JP2023164357A - Rice field methane reduction support apparatus, rice field methane reduction support system, information processing apparatus, and agriculture support system - Google Patents

Abstract

To evaluate a state of reduction of methane from a rice field by a farmer to improve convenience.SOLUTION: A rice field methane reduction support apparatus 1 has: a storage unit 1b for storing model data used for calculating a methane emission amount of a rice field; and a control unit 1a for calculating a methane emission amount of a rice field based on the model data. The control unit 1a acquires farmer information relating to a farmer and work information relating to farm work for cultivating crop corresponding to the farmer information; and calculate a methane reduction amount reduced from a predetermined reference methane emission amount of the rice field based on an actual work state of the farm work included in the work information.SELECTED DRAWING: Figure 1

Description

The present invention relates to technology that supports the reduction of methane emitted from rice fields.

Methane is a greenhouse gas that contributes to global warming. Methane is known to be emitted from paddy fields where crops such as rice are grown. For example, as disclosed in Non-Patent Documents 1 to 5, it is effective to reduce methane emissions from rice fields by changing agricultural practices such as water management in rice fields and/or application of organic matter; There are also negative effects such as a decrease in crop yields. Furthermore, Non-Patent Documents 2 to 5 describe a model (DNDC-Rice model) and calculation formulas for calculating the amount of methane released from rice fields.

August 2012 (Germany) National Institute of Agriculture and Environmental Technology, “New water management technology manual for suppressing rice field methane generation” (revised edition), [ON LINE] [Searched on April 28, 2020] Internet (URL: https://www.naro.affrc.go.jp/ /archive/niaes/techdoc/methane_manual.pdf) Ministry of the Environment Homepage, Calculation and Reporting of Greenhouse Gas Emissions and Absorption, etc., 3.C Rice Cultivation, "3.C.1 Rice Cultivation - Irrigated Intermittently Flooded (CH4)", [ON LINE] [Reiwa Searched on April 28, 2014] Internet (URL: https://www.env.go.jp/earth/ondanka/ghg-mrv/methodology/material/methodology_3C1.pdf) Tamon Fumoto et.al, Global Change Biology (2008) 14, 382-402, “Revising a process-based biogeochemistry model (DNDC) to simulate methane emission from rice paddy fields under various residue management and fertilizer regimes”, [ON LINE] [Retrieved April 28, 2020] Internet (URL: https://onlinelibrary.wiley.com/doi:10.1111/j.1365-2486.2007.01475.x) Nobuko Katayanagi et.al, Science of the Total Environment “Development of a method for estimating total CH4 emission from rice paddies in Japan using the DNDC-Rice model”, [ON LINE] [Retrieved April 28, 2020] Internet (URL: http://dx.doi.org/10.1016/j.scitotenv.2015.12.149) Hiroko Akiyama et.al, Atmos. Chem. Phys., 18, 10419-10431, 2018 “Controlling variables and emission factors of methane from global rice fields”, [ON LINE] [Retrieved April 28, 2020] Internet (URL: https://doi.org/10.5194/acp-18-10419-2018)

Currently, even if farmers change their farming practices in rice fields in order to reduce methane emissions from rice fields, there is no way to evaluate the methane reduction status, so it is not very convenient for farmers. It is. For this reason, it may be difficult for farmers to promote efforts to reduce methane from rice fields.

In view of the above-mentioned problems, the present invention aims to improve convenience by evaluating the reduction of methane from rice fields by farmers.

The technical means of the present invention for solving the above technical problem is characterized by the following points.

A rice field methane reduction support device according to one aspect of the present invention includes a storage unit that stores model data for calculating methane emissions from rice fields, and a control unit that calculates methane emissions from rice fields based on the model data. and, the control unit acquires farmer information regarding the farmer and work information regarding agricultural work for cultivating crops in a paddy field corresponding to the farmer information, and the control unit acquires farmer information regarding the farmer and work information regarding agricultural work for cultivating crops in the paddy field corresponding to the farmer information, and A methane reduction amount is calculated from a predetermined basic methane emission amount of the rice field based on the implementation state of agricultural work.

In one aspect of the present invention, the control unit may calculate the methane reduction amount of the rice field based on water management information included in the work information and indicating a water management state of the rice field.

Further, in one aspect of the present invention, the control unit identifies a dry state during crop cultivation in the paddy field based on the water management information indicating flooding, irrigation, and falling water in the paddy field, and The methane reduction amount of the rice field may be calculated based on the dry state.

Further, in one aspect of the present invention, the control unit may notify the farmer of evaluation information indicating the amount of methane reduction in the rice field based on the farmer information.

Further, in one aspect of the present invention, the control unit acquires rice field information regarding the rice field, and calculates the methane emission amount of the rice field based on the rice field information, the work information, and the model data. a formula is set, a basic semi-dry state of the paddy field is set based on the conventional water management information of the paddy field, and the basic methane emission of the paddy field is determined based on the calculation formula and the basic semi-dry state. calculate the amount, store the calculation formula, the basic semi-dry state, and the basic methane emission amount in the storage unit in association with the rice field information, based on the changed water management information of the rice field, Identify the semi-dry state of the rice field, calculate the methane emissions of the paddy field based on the semi-dry state of the paddy fields and the calculation formula, and calculate the methane emissions from the basic methane emissions of the paddy fields. The amount of methane reduction in the rice field may be calculated by subtracting .

Further, in one aspect of the present invention, the control unit acquires rice field information regarding the rice field, and calculates the methane emission amount of the rice field based on the rice field information, the work information, and the model data. a formula is set, the basic semi-dry state of the paddy field is set based on the conventional water management information of the paddy field, and the basic methane of the paddy field is determined based on the calculation formula and the basic semi-dry state. Calculate the amount of emissions, store the calculation formula, the basic semi-dry state, and the basic methane emissions in the storage unit in association with the rice field information, and include in the basic semi-dry state of the paddy field in the simulation. Each time the basic mid-dry period is extended at predetermined intervals, the methane reduction amount is calculated based on the extended mid-dry period, the calculation formula for the paddy field, the basic mid-dry period, and the basic methane emissions. calculate and derive a correlation between the dry period of the rice field and the methane reduction amount, store first correlation data indicating the correlation in the storage unit, and calculate the changed water management information of the rice field. Based on this, a mid-dry period of the rice field may be specified, and a methane reduction amount of the paddy field may be calculated based on the mid-dry period and the first correlation data.

Further, in one aspect of the present invention, the control unit may update the calculation formula for the rice field in accordance with a change in at least one of the rice field information and the work information for the rice field.

Further, in one aspect of the present invention, the rice field methane reduction support device includes a communication unit that communicates with an external device, and the control unit has a database constructed that stores information regarding a plurality of rice fields and a plurality of farmers. The communication unit transmits the farmer information and the paddy field information and work information of the paddy field corresponding to the farmer information from at least one of an agricultural management device and a farmer terminal device used by the farmer. and transmitting the water management information of the paddy field corresponding to the farmer information from at least one of a detection device that detects the water management state of the paddy field, the agricultural management device, and the farmer terminal device. It may be acquired by the department.

Further, in one aspect of the present invention, the detection device detects the water management state during crop cultivation in the rice field from a detection result of a water level sensor that detects a water level in the rice field, and the control unit The water management information indicating the water management state of the rice field detected by is acquired periodically or at a predetermined timing, and based on the plurality of acquired water management information, the dry state of the rice field is determined. may be specified.

Further, in one aspect of the present invention, the detection device detects the water management state during crop cultivation in the paddy field from observation results of the paddy field by a flying object or an observation device mounted on the flying object, and detects the water management state during crop cultivation in the paddy field. acquires the water management information indicating the water management state of the rice field detected by the detection device periodically or at a predetermined timing, and based on the acquired plurality of pieces of water management information, determines the water management status of the rice field. The dry state may be specified. Furthermore, the observation device may include a synthetic aperture radar.

Further, in one aspect of the present invention, each time the basic mid-dry period included in the basic mid-dry state of the paddy field is extended at a predetermined interval before and after in the simulation, the control unit may be configured to Calculating the methane reduction amount based on the calculation formula of the rice field, the basic mid-dry period, and the basic methane emission amount, and deriving a correlation between the mid-dry period of the rice field and the methane reduction amount; First correlation data indicating the correlation is stored in the storage unit, and based on the first correlation data, a recommended mid-drought period for the rice fields during which the methane reduction amount is equal to or greater than a predetermined value is determined, and Work proposal information including the dry period may be notified to the farmer based on the farmer information.

In one aspect of the present invention, the control unit estimates the basic yield of the crop in the paddy field based on the basic mid-dry period of the paddy field, the paddy field information, and the work information, and performs a simulation to estimate the basic yield of the crop in the paddy field. Each time the basic mid-dry period of a paddy field is extended at predetermined intervals, the yield of the crop in the paddy field is estimated based on the extended mid-dry period, the paddy field information, and the work information of the paddy field. and calculating the yield loss of the crop based on the yield and the basic yield, deriving a correlation between the mid-dry period of the paddy field and the yield loss of the crop, and calculating a second correlation showing the correlation. data is stored in the storage unit, and based on the first correlation data and the second correlation data, the methane reduction amount is greater than or equal to a first predetermined value and the yield reduction amount of the crop is less than or equal to a second predetermined value. The recommended mid-drying period of the paddy field may be determined.

Further, in one aspect of the present invention, the control unit transmits report information including the methane reduction amount of the rice field and the farmer information corresponding to the rice field to the credit management device through the communication unit, and The communication unit may acquire credit information indicating an electronic credit issued by the credit management device according to the amount of methane reduction, and notify the farmer of the credit information based on the farmer information. .

Further, in one aspect of the present invention, the control unit adds up the methane reduction amount of the plurality of rice fields and transmits report information indicating the combined methane reduction amount to the credit management device through the communication unit, The communication unit acquires credit information indicating a credit issued by the credit management device according to the total methane reduction amount, and the credit indicated by the credit information is distributed according to the methane reduction amount of the plurality of rice fields. and credit information indicating the distributed credits may be notified to the farmers corresponding to each of the plurality of rice fields based on the farmer information.

Further, in one aspect of the present invention, the control unit includes paddy field information regarding the paddy field, the conventional work information in the paddy field, and the target work indicating the agricultural work changed to reduce methane from the paddy field. information, a calculation formula for calculating the methane emissions of the rice fields set based on the model data, and variables included in the calculation formula are included in the report information by the communication unit. It may also be transmitted to a credit management device.

Further, in one aspect of the present invention, the control unit estimates the credit according to the amount of methane reduction in the rice field, includes provisional credit information indicating the estimated credit in the report information, and causes the communication unit to credit the credit. The provisional credit information may be transmitted to a management device or may be notified to the farmer based on the farmer information.

Further, in one aspect of the present invention, the rice field methane reduction support device includes an input/output interface for inputting and outputting information, and the control unit includes a sales request indicating that the farmer wants to sell the credit owned by the farmer. When information is received by the communication unit from the farmer terminal device used by the farmer, the input/output method inputs and outputs payment instruction information indicating an instruction to make a predetermined trader pay the price of the credit indicated by the sale request information. When payment completion information outputted by the interface and indicating that the transactor has paid the price to the farmer is inputted by the input/output interface, the owner of the credit is transferred from the farmer to the transactor. You may change it to someone else.

Further, in one aspect of the present invention, when the communication unit receives purchase request information indicating that the credit is to be purchased from a customer terminal device used by a consumer, the control unit is configured to receive purchase request information indicating that the customer wants to purchase the credit. A payment instruction for causing the consumer to pay the price of the credit to be sent to the consumer terminal device, and payment completion information indicating that the consumer has paid the price to the trader is sent to the consumer terminal. When received by the communication unit from the device, the owner of the credit may be changed from the transaction person to the consumer.

A rice field methane reduction support system according to one aspect of the present invention includes the rice field methane reduction support device, and an agricultural management device in which a database storing information regarding a plurality of rice fields and a plurality of farmers is constructed, and the rice field methane reduction support system includes: The control unit of the methane reduction support device receives farmer information regarding the farmer and a paddy field corresponding to the farmer information from at least one of the agricultural management device and a farmer terminal device used by the farmer. and work information related to agricultural work for cultivating crops, and calculate the amount of methane reduction reduced from a predetermined basic methane emission amount of the rice field based on the implementation status of the agricultural work included in the work information. It's okay.

In one aspect of the present invention, the control unit of the rice field methane reduction support device transmits evaluation information indicating the methane reduction amount of the rice field to the farmer terminal device based on the farmer information using the communication unit. You may.

Further, in one aspect of the present invention, the rice field methane reduction support system includes a detection device that detects a water management state of the rice field, and the detection device detects a detection result of a water level sensor that detects the water level of the rice field, or a flying object. Alternatively, the water management state of the rice field is detected based on the observation results of the rice field by an observation device mounted on an aircraft, and the water management information including the water management state is transmitted to the agricultural management device and the rice field methane. The control unit of the rice field methane reduction support device transmits the farmer information and the agricultural information from at least one of the agricultural management device and the farmer terminal device. The paddy field information and the work information of the paddy field corresponding to the worker information are acquired by the communication unit, and the information on the crops in the paddy field is acquired from at least one of the detection device, the agricultural management device, and the farmer terminal device. The communication unit acquires the water management information during cultivation periodically or at a predetermined timing, identifies the mid-dry state of the paddy field based on the acquired plurality of water management information, and determines the mid-dry state of the rice field. The methane reduction amount of the rice field is calculated based on the state.

Further, in one aspect of the present invention, the farmer terminal device may be configured to be able to input at least one of the farmer information, the work information, and rice field information regarding the rice fields.

Further, in one aspect of the present invention, the control unit of the rice field methane reduction support device transmits report information including the methane reduction amount of the rice field and the farmer information corresponding to the rice field by the communication unit. The communication unit acquires credit information indicating an electronic credit transmitted to a management device and issued from the credit management device according to the methane reduction amount, and the credit information is transmitted to the farmer terminal device by the communication unit. You may also send it to

An information processing device according to one aspect of the present invention includes an acquisition unit that acquires work information related to agricultural work for cultivating crops in a rice field and detected water management information indicating a water management state of the rice field detected by a detection device. , a control unit that determines whether a water management abnormality has occurred in the rice field based on a difference between target water management information indicating a water management state of the rice field identified from the work information and the detected water management information; and an output unit that outputs water management abnormality information indicating that the water management abnormality has occurred.
An agricultural support system according to one aspect of the present invention includes a detection device that detects a water management state of a rice field, and the information processing device.

In one aspect of the present invention, the detected water management information includes a detection result of a water level sensor that detects the water level of the rice field, and the control unit determines the target water level of the rice field from the target water management information. The actual water level of the rice field may be identified from the detection result of the water level sensor, and if the actual water level is higher than the target water level by a predetermined value or more, it may be determined that the water management abnormality has occurred.

Further, in one aspect of the present invention, the detected water management information includes observation results of an observation device that observes the area where the rice field is located, and the control unit controls the area of the rice field from the target water management information. A target water management state is specified, and it is determined from the observation results of the observation device whether the surface of the rice field is a water surface, and the target water management state is a falling water state in which the rice field is not filled with water. It may be determined that the water management abnormality has occurred when the surface of the rice field is determined to be a water surface based on the observation results of the observation device.

Further, in one aspect of the present invention, the detected water management information includes an observation result of an observation device that observes an area where at least one of the rice fields is located, and the control unit is configured to cause the acquisition unit to acquire rice field information related to the rice field, specify the position of the rice field from the rice field information, calculate the target water surface area of the rice field whose surface becomes water surface from the target water management information, and calculate the target water surface area of the rice field whose surface becomes the water surface from the observation results of the observation device. and determine whether the surface of the land around the rice field is a water surface, calculate the actual water surface area that is the sum of the areas of the rice field and the land whose surface is water surface, If the water surface area is larger than the target water surface area by a predetermined value or more, it may be determined that the water management abnormality has occurred.

Further, in one aspect of the present invention, the acquisition unit acquires farmer information regarding the farmer corresponding to the rice field, and when it is determined that the water management abnormality has occurred, the farmer information is transmitted to the farmer based on the farmer information. The water management abnormality information may be notified by the output unit. Alternatively, the control unit acquires land management information including information indicating a manager of land around the rice field using the acquisition unit, and when it is determined that the water management abnormality has occurred, the control unit acquires land management information including information indicating a manager of land around the rice field, and when it is determined that the water management abnormality has occurred, The water management abnormality information may be notified to the administrator by the output unit.

According to the present invention, it is possible to quantitatively evaluate the reduction status of methane from rice fields by farmers, thereby improving convenience.

It is a block diagram of an example of a rice field methane reduction support system. It is a diagram showing an example of the timing and water level when cultivating rice in a paddy field. It is a flowchart which shows an example of the outline operation of a rice field methane reduction support device. It is a flowchart which shows an example of initial setting operation of a rice field methane reduction support device. It is a figure showing an example of a model formula of a rice field methane reduction support device. It is a flowchart which shows an example of methane evaluation operation of a rice field methane reduction support device. It is a figure which shows an example of the 1st correlation data which shows the correlation between the drying period of a rice field, and the amount of methane reduction. It is a flowchart which shows an example of the drying proposal operation of the rice field methane reduction support device. It is a flowchart which shows an example of calculation formula update operation of a rice field methane reduction support device. It is a flowchart which shows an example of credit conversion operation of a rice field methane reduction support device. It is a flowchart which shows another example of the credit conversion operation of the rice field methane reduction support device. It is a flowchart which shows an example of credit purchase operation of a rice field methane reduction support device. It is a flowchart which shows an example of credit transaction operation of a rice field methane reduction support device. FIG. 1 is a configuration diagram of an example of an agricultural support system. It is a flowchart which shows an example of water management abnormality detection operation of an information processing device.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an example of a rice field methane reduction support system 100. In the rice field methane reduction support system 100, the rice field methane reduction support device 1 and the agricultural management device 2 are configured with at least one information processing device such as a computer and a server installed in a management center, for example.

The rice field methane reduction support device 1 is a device that supports the reduction of methane emitted from rice fields, and includes a control section 1a, a storage section 1b, a communication section 1c, and an input/output interface 1d. The control unit 1a is a controller, and is composed of a CPU (or microcomputer), memory, and the like.

The storage unit 1b is a storage, and is composed of a volatile memory, a nonvolatile memory, a hard disk, or the like. The storage unit 1b stores a software program executed by the control unit 1a, and stores various control data used by the control unit 1a in a readable and writable manner. Furthermore, the storage unit 1b stores model data for calculating the amount of methane emitted from the rice fields. The control unit 1a calculates the methane emission amount, methane reduction amount, etc. of the rice field based on the model data stored in the storage unit 1b.

The communication unit 1c is a communication interface for communicating with an external device via a public communication network, the Internet, or the like. The input/output interface 1d includes an input interface such as a mouse, keyboard, or touch panel, and an output interface such as a display, speaker, or touch panel.

The agricultural management device 2 is a device that manages various information related to agriculture. Although one agricultural management device 2 is illustrated in FIG. 1, there may be two or more agricultural management devices 2. The agricultural management device 2 also includes a control section, a storage section, a communication section, and an input/output interface (not shown). Further, the agricultural management device 2 is constructed with a database 2d that stores various information regarding a plurality of rice fields and a plurality of farmers who cultivate crops in the rice fields. Specifically, the database 2d stores a plurality of pieces of farmer information regarding farmers, paddy field information regarding paddy fields, and work information regarding agricultural work performed to cultivate crops in paddy fields. Furthermore, the farmer information, paddy field information, and work information are stored in the database 2d in association with each farmer or each paddy field.

The farmer information includes information such as the farmer's personal information, identification information such as the farmer's account, and the IP address of the farmer terminal device 3 used by the farmer. Paddy field information includes identification information of the paddy field, area where the paddy field is located, location of the paddy field (latitude, longitude, etc.), area, contour shape, soil condition, drainage, cultivated crops, and sensors installed in the paddy field. Contains information such as equipment.

The work information includes a farm work plan for cultivating crops in paddy fields, the contents of the farm work, the implementation status of the farm work, and the like. In addition, the agricultural work included in the work information includes, for example, water management work such as flooding, irrigation, and falling water in rice fields, and the relevant water management work and its implementation status (water management status, such as the water intake or drainage of the rice field). The work information includes water management information indicating the opening/closing status of the exit, the opening/closing date and time, etc. Further, the work information may include the implementation status of agricultural work such as plowing in rice straw in a paddy field, taking out rice straw, and applying compost. Further, the work information may include weather information on the day of agricultural work in the rice field and information on the growth of crops in the rice field. As the growth information of crops in the paddy field, the work information may include, for example, the heading date, tillering stage, and panicle formation stage of paddy rice. For example, the work information may be an electronic agricultural diary in a rice field.

The control unit 1a of the rice field methane reduction support device 1 communicates with the agricultural management device 2 through the communication unit 1c, and acquires (receives) farmer information, rice field information, and work information from the database 2d. Further, the control unit 1a transmits information regarding the reduction of methane from rice fields to the agricultural management device 2 through the communication unit 1c, and causes the information to be stored in the database 2d.

The farmer terminal device 3 includes a personal computer, a tablet terminal device, a smartphone, or the like used by the farmer. In FIG. 1, two farmer terminal devices 3 are illustrated, but there may be three or more farmer terminal devices 3. The farmer terminal device 3 also includes a control section, a storage section, a communication section, and an input/output interface (not shown). The farmer inputs various information such as farmer information, paddy field information, and work information into the farmer terminal device 3. The farmer terminal device 3 transmits input farmer information, rice field information, work information, etc. to the agricultural management device 2 or the rice field methane reduction support device 1.

When the agricultural management device 2 receives the farmer information, paddy field information, work information, etc. transmitted from the farmer terminal device 3, it stores each piece of information in the database 2d. When the rice field methane reduction support device 1 (control unit 1a) receives farmer information, rice field information, work information, etc. transmitted from the farmer terminal device 3 through the communication unit 1c, the rice field methane reduction support device 1 (control unit 1a) stores each information in the storage unit 1b. let

The water management device 4 is installed on the edge of a rice field or inside the rice field, and the water level sensor 5 is installed inside the rice field. The water management device 4 and the water level sensor 5 are electrically connected by wire or wirelessly. In FIG. 1, one water management device 4 and one water level sensor 5 are illustrated, but one or more water management devices 4 and one or more water level sensors 5 are installed in each paddy field. The water management device 4 also includes a control section, a storage section, and a communication section (not shown). Further, the water management device 4 is equipped with an operation switch, an actuator, a storage battery, a solar power generation device, and the like. The water management device 4 opens and closes the water gate of the rice field using an actuator such as a motor to supply or drain water to the rice field. Furthermore, the water management device 4 may be provided with another actuator such as a pump that facilitates water supply and drainage to the rice fields. In this case, the operating state of an actuator such as a pump may be included in the work information.

The water level sensor 5 detects the water level in the rice field and transmits the detection result to the water management device 4. The water management device 4 detects a water management state such as flooding, irrigation, or falling water in the rice field based on the detection result of the water level sensor 5. Then, the water management device 4 controls the operation of the actuator according to the detection result of the water level sensor 5 and the water management state of the paddy field, supplies or drains water to the paddy field, and performs flooding of the paddy field, intermittent irrigation, and Perform a falling water.

Further, the water management device 4 transmits water management information indicating the detection result of the water level sensor 5 and the water management state of the rice field to the agricultural management device 2 or the rice field methane reduction support device 1. When the agricultural management device 2 receives the water management information transmitted from the water management device 4, the agricultural management device 2 stores the water management information in the database 2d so that it is included (associated) with the work information of the corresponding rice field. When the rice field methane reduction support device 1 (control unit 1a) receives water management information transmitted from the water management device 4, it stores the water management information in the storage unit 1b.

The earth observation satellite 7 is an example of a flying object and an observation device, and observes the earth's surface. In the rice field methane reduction support system 100, the earth observation satellite 7 is composed of a SAR (Synthetic Aperture Radar) satellite, and observes rice fields using a synthetic aperture radar. The monitoring device 6 acquires observation results of the earth observation satellite 7. The monitoring device 6 also includes a control section, a storage section, a communication section, and an input/output interface (not shown). In FIG. 1, one monitoring device 6 and one earth observation satellite 7 are illustrated, but there may be two or more monitoring devices 6 and two or more earth observation satellites 7.

The monitoring device 6 detects water management conditions such as flooding, irrigation, and falling water in the rice fields from the observation results of the earth observation satellite 7. Specifically, the monitoring device 6 acquires a radar image of the rice field captured by the synthetic aperture radar of the earth observation satellite 7, and detects uneven portions of the rice field based on the radar image. Then, the monitoring device 6 calculates, for example, the ratio of the area of the uneven portion to the surface area of the paddy field, and if the ratio is less than a predetermined value, determines that the surface of the paddy field is a water surface and that the paddy field is in a flooded state. do. In addition, the monitoring device 6 determines that the surface of the paddy field is not the water surface (the water level of the paddy field is zero) and that the paddy field is in a flooded state when the ratio of the area of the uneven portion to the surface area of the paddy field is greater than or equal to a predetermined value. do. Further, the monitoring device 6 may determine that the paddy field is in an irrigated state based on a change in the ratio of the area of the uneven portion to the surface area of the paddy field.

Determination of water management conditions such as flooding, irrigation, and falling water in rice fields based on the radar image of the synthetic aperture radar is not limited to the above method, and may be determined using other methods. Furthermore, the rice field methane reduction support device 1 may be equipped with AI (Artificial Intelligence), and the water management state of the rice field may be detected from the radar image of the synthetic aperture radar using the AI by machine learning.

The monitoring device 6 transmits water management information indicating the water management state of the rice fields to the agricultural management device 2 or the rice field methane reduction support device 1. When the agricultural management device 2 receives the water management information transmitted from the monitoring device 6, the agricultural management device 2 stores the water management information in the database 2d so as to include (associate) the water management information with the work information of the corresponding rice field. Paddy methane reduction support device 1 (control unit 1
In a), when water management information transmitted from the monitoring device 6 is received, the water management information is stored in the storage unit 1b.

In order to detect the water management state of the rice fields, at least one of a first detection configuration including a water level sensor 5 and a water management device 4 and a second detection configuration including an earth observation satellite 7 and a monitoring device 6 is used. The detection configuration may be applied to the rice field methane reduction support system 100. Further, in addition to or in place of at least one of the first detection configuration and the second detection configuration, the farmer may input the water management state of the rice field using the farmer terminal device 3. In addition, observation devices such as synthetic aperture radar, three-dimensional laser surveying instruments, or imaging devices can be mounted on flying objects other than the Earth observation satellite 7, or flying objects such as drones or UAVs (Unmanned Aerial Vehicles) to survey rice fields. May be observed.

The credit management device 8 is a device that manages electronic credits according to the amount of greenhouse gas reduction, and is used by a credit management company. The credit management device 8 also includes a control section, a storage section, a communication section, and an input/output interface (not shown). Although one credit management device 8 is illustrated in FIG. 1, there may be two or more credit management devices 8. Further, there may be a plurality of credit management companies.

The rice field methane reduction support device 1 (control unit 1a) transmits report information including the amount of methane reduction in the rice field and farmer information corresponding to the rice field to the credit management device 8. The credit management device 8 issues a credit according to the amount of methane reduction in the rice field included in the report information received from the rice field methane reduction support device 1, and transmits credit information indicating the credit to the rice field methane reduction support device 1. Upon receiving the credit information from the credit management device 8, the rice field methane reduction support device 1 (control unit 1a) transmits (transfers) the credit information to the farmer terminal device 3 used by the corresponding farmer. Furthermore, the rice field methane reduction support device 1 (control unit 1a) executes processing for purchasing credits from farmers.

The customer terminal device 9 is a terminal device used by a customer such as a company, an organization, or an individual who buys and sells credits. The customer terminal device 9 also includes a control section, a storage section, a communication section, and an input/output interface (not shown). In FIG. 1, one customer terminal device 9 is illustrated, but there may be two or more customer terminal devices 9. Moreover, there may be multiple consumers. The rice field methane reduction support device 1 (control unit 1a) executes processing for trading (buying and selling) credits with the consumer terminal device 9.

FIG. 2 is a diagram showing an example of the timing and water level WL when paddy rice R is cultivated in the paddy field H. When paddy rice R is cultivated as a crop in a paddy field H, the paddy field H is watered from the puddling period, and the paddy field H is brought into a deep water state during the rice planting period and the rooting period. Then, for a while after the tillering period, the paddy field H is watered intermittently to bring it into a shallow water state, and then the water is allowed to fall from the paddy field H, and the paddy field H is left to dry for a while (the water level in the paddy field is zero). state). Additionally, if rice fields H remain flooded during the tillering period when temperatures are high, soil reduction will progress and the activity of methane-producing bacteria in the soil will become active, using organic matter such as rice straw as a substrate to produce methane. (greenhouse gas) is generated. The generated methane is discharged into the atmosphere through the organs of rice R.

In order to reduce the amount of methane emitted from the rice fields H, for example, the rice fields H are irrigated intermittently or dried during the drying period to introduce oxygen into the soil, thereby changing the soil from a reduced state to an oxidized state. Furthermore, by extending the drying period of the rice fields H, methane emissions from the rice fields H can be further reduced. Mid-drying of paddy H is either not carried out in normal farming methods, or is carried out for the purpose of suppressing the occurrence of wasteful tillering, preventing overgrowth, promoting root development, and preventing lodging. In addition, mid-drying leaves the rice in a state of falling water to the extent that slight cracks appear on the rice field, and this state continues for approximately 5 to 7 days. There is also the idea that it would be preferable to extend the mid-drying period for paddy fields by at least seven days.
However, before and after the panicle formation stage of paddy rice R, intermittent irrigation (intermittent irrigation) is applied to paddy field H. In order to reduce methane emissions between the tillering stage of paddy field H and the panicle formation stage (more preferably before heading of rice field R) without adversely affecting the panicle formation of rice field R, it is necessary to It is more effective to extend the period earlier (toward the tillering stage) than to extend it later (toward the panicle formation stage).

Before and after the heading period, the paddy field H is flooded to bring it into a deep water state. Thereafter, during the ripening stage of rice R, the rice field H is intermittently watered, and at the ripening stage, water falls from the rice field H to bring the water level in the rice field to zero and dry the soil of the rice field. By plowing rice straw into the soil after harvesting paddy rice R, methane emissions from paddy field H can also be reduced. Furthermore, by applying compost during plowing (autumn plowing), the amount of methane emitted from the rice fields H is further reduced.

FIG. 3 is a flowchart showing an example of a schematic operation of the rice field methane reduction support device 1. Each process is executed by the control unit 1a. (The control unit 1a also executes each process in FIGS. 4, 6, and 8 to 12, which will be described later.)

The control unit 1a of the rice field methane reduction support device 1 first registers the farmer and the rice field whose methane emissions are to be reduced (S1 in FIG. 3). Next, the control unit 1a performs settings for evaluating the reduction of methane from rice fields (S2). Then, the control unit 1a evaluates the reduction status of methane from the rice fields based on the implementation status of agricultural work in the rice fields by farmers (S3). At the time of the evaluation, the control unit 1a calculates the amount of methane reduction in the rice fields. Thereafter, the control unit 1a converts the amount of methane reduction in the rice fields into credits using the credit management device 8 (S4), and trades the credits with farmers via the farmer terminal device 3 or via the consumer terminal device 9. and transact with the consumer (S5).

FIG. 4 is a flowchart showing an example of the initial setting operation (operation at the time of initial setting) of the rice field methane reduction support device 1. The initial setting operation in FIG. 4 shows details of the processes S1 and S2 in FIG. For example, when a farmer connects to the rice field methane reduction support device 1 using the farmer terminal device 3 and inputs the identification information of the rice field whose methane is to be reduced, etc., the farmer terminal device 3 The registration information including the identification information is generated and the registration information is transmitted to the rice field methane reduction support device 1.

When the controller 1a of the rice field methane reduction support device 1 receives the registration information from the farmer terminal device 3 through the communication unit 1c (S11 in FIG. 4), the controller 1a uses the farmer's identification information and the rice field's identification information included in the registration information. An information request signal requesting transmission of farmer information, paddy field information, and work information corresponding to the above information is transmitted to the agricultural management device 2 by the communication unit 1c (S12).

The agricultural management device 2 receives the information request signal from the rice field methane reduction support device 1, searches the database 2d, and stores farmer information and rice fields corresponding to the requested farmer identification information and rice field identification information. If the information and work information are stored in the database 2d, the farmer information, rice field information, and work information are transmitted to the rice field methane reduction support device 1. When the control unit 1a of the rice field methane reduction support device 1 receives (acquires) the farmer information, rice field information, and work information from the farmer terminal device 3 through the communication unit 1c (S13: YES), the control unit 1a receives the farmer information, the rice field information, and the work information from the farmer terminal device 3 (S13: YES). The paddy field information and work information are stored in the storage unit 1b (S18). At this time, the farmer information, paddy field information, and work information acquired by the control unit 1a correspond to each other.

On the other hand, the agricultural management device 2 stores farmer information, past rice field information, and work information corresponding to the farmer identification information and the rice field identification information requested by the rice field methane reduction support device 1 in the database 2d. If not, the rice field methane reduction support device 1 is notified that there is no corresponding information. When the control unit 1a of the rice field methane reduction support device 1 receives a notification from the communication unit 1c indicating that there is no corresponding information (S14), the control unit 1a sends the farmer information to the farmer terminal device 3 corresponding to the farmer's identification information. An information request signal requesting rice field information and work information is transmitted by the communication unit 1c (S15).

When the farmer terminal device 3 receives the information request signal from the rice field methane reduction support device 1, it causes the input/output interface display to display a screen for inputting farmer information, rice field information, and work information. That is, the farmer terminal device 3 is configured to be able to input farmer information, work information, rice field information, and the like. When the farmer information, paddy field information, and work information are inputted using the keyboard of the input/output interface, the farmer terminal device 3 transmits the farmer information, paddy field information, and work information to the paddy field methane reduction support device 1. Send.

When the control unit 1a of the rice field methane reduction support device 1 receives farmer information, rice field information, and work information from the farmer terminal device 3 through the communication unit 1c (S16), the control unit 1a receives the farmer information, rice field information, and work information from the farmer terminal device 3 (S16). is transmitted to the agricultural management device 2 and stored in the database 2d (S17), and the farmer information, paddy field information, and work information are stored in the storage unit 1b (S18). At this time, the farmer information, paddy field information, and work information acquired by the control unit 1a also correspond to each other.

Next, the control unit 1a calculates the amount of methane emissions from the rice fields based on the rice field information and work information received (acquired) from the agricultural management device 2 or the farmer terminal device 3, and the model data stored in the storage unit 1b. A calculation formula to be calculated is set (S19a). The model data includes known model equations (1) and (2) as shown in FIG. 5, and variables A, fd, fw, fo, EF, α in the model equations (1) and (2) , a, X, b, table data (not shown), etc. are included. Model formula (1) is a formula for calculating the methane emission amount E of rice fields. Model formula (2) is a formula for calculating the emission coefficient included in model formula (1).

The control unit 1a sets the variables A, fd, fw, fo, α, EF, (A: paddy rice cultivation area by region, fd: drainage ratio, fw: water management ratio, fo: organic matter ratio, α: correction factor, EF: emission factor, X: organic matter application amount by region and applied organic matter, a: By determining the slope by region, drainage gender, and water management, b: intercept by region, drainage gender, and water management, the formula for calculating methane emissions from rice fields (formula (1) after determining variables, (2)).

The variables fw, EF, a, and b in model formula (2) are values determined by the water management state of the rice field. The correction coefficient α in model formula (1) may be determined based on, for example, a global warming coefficient published by a predetermined organization. The variables fd and EF in model formulas (1) and (2) are determined based on the drainage performance of the rice field, and the drainage performance is determined based on the results of measuring the daily water depth of the rice field under predetermined conditions. It's okay. Further, the daily water depth of the rice field may be included in the work information.

The control unit 1a sets the basic drying state of the paddy field based on the conventional water management information included in the paddy field work information received (acquired) from the agricultural management device 2 or the farmer terminal device 3 (see FIG. 4). S19b). Conventional water management information indicates, for example, the state of rice field water management that is customary in a region where there is a rice field. The control unit 1a may set the basic semi-dry state of the rice fields, for example, based on water management information from the current fiscal year to the past several years. The basic mid-dry state includes whether or not mid-dry is implemented and the mid-dry period (for example, the duration of the state in which the water level in the rice field is zero or substantially zero (including a certain degree of error)). There is. The control unit 1a identifies whether or not mid-drying is to be implemented and the mid-drying period based on, for example, the water supply date and draining date for the rice fields, or the mid-drying start date and mid-drying end date, which are indicated in the conventional water management information. Good too.

The control unit 1a also sets a variable a based on the basic mid-dry state and a predetermined slope calculation formula included in the model data, and sets a variable a based on the basic mid-dry state and a predetermined intercept calculation formula included in the model data. b is set, and a variable fw is set based on the basic mid-dry state and predetermined table data included in the model data. Then, the control unit 1a calculates the basic methane emission amount of the rice field using the determined calculation formulas (1) and (2) (S19c). That is, the control unit 1a calculates the basic methane emission amount of the rice field based on the determined calculation formulas (1) and (2) and the basic semi-dry state. Further, the control unit 1a stores the determined calculation formulas (1) and (2), the basic dry condition, and the basic methane emission amount in the storage unit 1b (S19d).

The model data and calculation formula for calculating the methane emissions of rice fields are not limited to the above, and may be formulas or data other than formulas (1) and (2) in FIG. 5. Furthermore, the amount of methane emissions from the rice fields may be calculated using model data and calculation formulas that take into consideration information other than the rice field information and work information of the rice fields, such as weather information. Furthermore, a formula for calculating methane emissions from rice fields may be set or the methane emissions from rice fields may be calculated using AI and machine learning.

FIG. 6 is a flowchart showing an example of the methane evaluation operation (operation during methane evaluation) of the rice field methane reduction support device 1. The methane evaluation operation in FIG. 6 is an operation for evaluating the state of reduction of methane from rice fields, and shows details of the process S3 in FIG. 3. For example, in order to reduce methane from rice fields, farmers change their farming operations such as water management in rice fields, and then harvest the crops (paddy rice) in the rice fields to complete the current farming season. Then, when the farmer connects to the rice field methane reduction support device 1 using the farmer terminal device 3 and instructs the execution of methane evaluation of the rice field, the farmer terminal device 3 sends a methane evaluation command to the rice field methane reduction support device 1. do.

When the control unit 1a of the rice field methane reduction support device 1 receives the methane evaluation command from the farmer terminal device 3 through the communication unit 1c (S21 in FIG. 6), the control unit 1a includes the farmer's identification information included in the methane evaluation command and The farmer information, paddy field information, and work information corresponding to the identification information are acquired from the agricultural management device 2 or the farmer terminal device 3 (S22). This information acquisition process S22 is executed in the same procedure as the processes S12 to S18 in FIG. 4. (The information acquisition process in process S31 in FIG. 8 and process S41 in FIG. 9, which will be described later, is also similar.)

Next, the control unit 1a reads the implementation state of the agricultural work included in the acquired work information, and identifies the drying state of the rice field in which the agricultural work was performed based on the water management information included in the work information (S23). The mid-drying state identified at this time includes whether or not mid-drying is implemented in the rice fields and the mid-drying period. For example, the control unit 1a determines whether or not mid-drying is to be carried out and the mid-drying based on the water supply date and draining date for the paddy field, or the mid-drying start date and mid-drying end date indicated by the water management information included in the acquired work information. The period may also be specified. Further, at this time, the control unit 1a may check whether at least the start date of the specified start date and end date of the mid-dry period is before the heading of paddy rice cultivated in the paddy field. Then, the control unit 1a determines the specified mid-dry period if the start date of the mid-dry period is before the heading of paddy rice, and determines the specified mid-dry period if the start date of the mid-dry period is the heading date of paddy rice or after the heading of rice. It is also possible to invalidate the mid-season period and determine that the mid-season period was not implemented. The heading date of paddy rice in a paddy field can be determined by, for example, inputting the date on which the farmer visually confirmed the paddy rice heading into the farmer terminal device 3, and then using the farmer terminal device 3 directly or through the agricultural management device 2 to reduce rice methane. It is sent to the support device 1.

Next, the control unit 1a reads the calculation formula (the above-described determined formulas (1) and (2)) corresponding to the rice field from the storage unit 1b, and specifies the calculation formula, the read implementation state of the agricultural work, and The amount of methane emitted from the rice field is calculated based on the dry state of the rice field (S24). Next, the control unit 1a reads the basic methane emissions corresponding to the rice fields from the storage unit 1b, and calculates the methane reduction amount of the rice fields by subtracting the methane emissions of the rice fields from the basic methane emissions (S25 ). That is, the control unit 1a calculates the amount of methane reduction in the paddy field that is reduced due to a change in agricultural work in the paddy field or a change in the specified mid-dry state to the basic mid-dry state.

Then, the control unit 1a generates evaluation information including the calculated amount of methane reduction in the rice fields, and transmits the evaluation information to the farmer terminal device 3 using the communication unit 1c based on the farmer information (S26). . The evaluation information may include not only the amount of methane reduction in the rice fields, but also the specified mid-dry period or the calculated amount of methane emissions.

The methane evaluation operation shown in Figure 6 shows an example in which methane emissions are calculated using a calculation formula corresponding to rice fields, and the methane reduction amount is calculated by subtracting the methane emissions from the basic methane emissions. However, in addition to this, for example, the correlation between the dry period of rice fields and the amount of methane reduction can be derived in advance based on a calculation formula, and the amount of methane reduction can be calculated based on the correlation and the specified dry period. It's okay.

Specifically, for example, the control unit 1a may extend the basic mid-drying period included in the basic mid-drying state of paddy fields at predetermined intervals forward or backward (forward or backward) in the initial setting operation or the like in advance in the simulation. Methane emissions are calculated based on the extended mid-dry period and the rice field calculation formula, and the methane emissions are subtracted from the basic methane emissions to calculate the methane reduction amount for the rice fields. Then, the control unit 1a derives a correlation between the dry period of the rice fields and the amount of methane reduction, and causes the storage unit 1b to store first correlation data indicating the correlation.

FIG. 7 is a diagram showing an example of first correlation data showing the correlation between the drying period of rice fields and the amount of methane reduction. The first correlation data shown in FIG. 7 shows the correlation between the dry period of rice fields and the amount of methane reduction in a table format. In addition, the first correlation data shows the amount of methane reduction in the case of the basic drying period (5 days) of rice fields, the amount of methane reduction in the case of extending the basic drying period by 7 days and 14 days, respectively, and the basic drying period. Methane reduction amount when the basic dry period is extended by 7 days and 14 days, respectively, Methane reduction amount when the basic dry period is extended by 7 days earlier and 7 days later, Methane reduction amount when the basic dry period is extended by 7 days and 7 days later, respectively The figure shows the amount of methane reduced when the period is extended for 14 days.

In this case, in the methane evaluation operation, the control unit 1a identifies the dry state of the rice field, and calculates the methane emission amount of the rice field based on the dry period included in the dry state and the first correlation data. Calculate methane reduction amount without Specifically, for example, when the mid-drying period of rice fields is extended by 10 days earlier than the basic mid-drying period, the control unit 1a calculates the methane reduction amount Ya in the case of 7 days in advance of the first correlation data and Based on the methane reduction amount Yc for 14 days, the methane reduction amount for the mid-dry period of 10 days ahead of schedule is calculated.

The method for calculating the amount of methane reduction in rice fields is not limited to the calculation method described above, and the amount of methane reduction in rice fields may be calculated based on other calculation formulas or data. In addition, as the amount of methane reduction (and methane emissions) in rice fields, at least one of the amount of methane reduction (and methane emissions) in the entire rice field and the amount of methane reduction (and methane emissions) per unit area of the rice field. It may be calculated. Alternatively, the methane reduction rate (%) of the rice fields may be calculated as the methane reduction amount. Furthermore, the amount of methane reduction in the rice fields may be calculated using model data and calculation formulas that take into consideration information other than the rice field information and work information of the rice fields, such as weather information. Furthermore, the amount of methane reduction in rice fields may be calculated using AI and machine learning.

FIG. 8 is a flowchart showing an example of the drying proposal operation of the rice field methane reduction support device 1. The drying proposal operation in FIG. 8 is an operation that proposes a recommended drying period that effectively and beneficially reduces methane from rice fields. For example, before a farmer starts drying work in a rice field, the control unit 1a of the rice field methane reduction support device 1 transmits farmer information, rice field information, and work information corresponding to the rice field to the agricultural management device 2 or the farmer terminal. It is acquired from the device 3 (S31 in FIG. 8). This information acquisition process S31 is executed in the same procedure as the processes S12 to S18 in FIG. 4.

Next, as described above, the control unit 1a calculates the amount of methane reduction in the paddy fields each time the basic dry period included in the basic dry state of the paddy fields is extended at predetermined intervals before and after the simulation, and The correlation between the middle dry period and the amount of methane reduction is derived, and first correlation data indicating the correlation is stored in the storage unit 1b (S32 in FIG. 8).

In addition, the control unit 1a calculates the yield loss of crops in the paddy field each time the basic dry period of the paddy field is extended at predetermined intervals before and after the basic dry period of the paddy field, and calculates the correlation between the mid-dry period of the paddy field and the yield loss of the crops. is derived, and second correlation data indicating the correlation is stored in the storage unit 1b (S33).

Specifically, for example, the control unit 1a estimates the basic yield of crops in the paddy field based on the basic mid-dry period of the paddy field, the paddy field information, and the work information. In addition, each time the basic mid-dry period of the paddy field is extended at predetermined intervals in the simulation, the control unit 1a controls the production of crops in the paddy field based on the extended mid-dry period, paddy field information, and work information of the paddy field. Estimate yield. The longer the dry period in rice fields, the lower the crop yield. Therefore, the control unit 1a calculates the reduced crop yield by subtracting the crop yield calculated for each extended mid-dry period from the basic yield, and correlates the mid-dry period of the paddy field with the reduced crop yield. A relationship is derived, and second correlation data indicating the correlation is generated. The second correlation data may be data in a table format or may be an arithmetic expression.

Next, the control unit 1a determines, based on the first correlation data and the second correlation data, recommended mid-drying for paddy fields in which the amount of methane reduction is greater than or equal to a first predetermined value and the amount of crop yield reduction is less than or equal to a second predetermined value. The period is determined (S34). Then, the control unit 1a transmits work proposal information including the determined recommended mid-drying period to the farmer terminal device 3 corresponding to the paddy field through the communication unit 1c (S35). If the basic mid-drying period is 0 days, that is, if mid-drying has not been carried out in the paddy fields in the past, the control unit 1a includes information to recommend implementation of mid-drying in the work proposal information in step S35. Good too. If the basic mid-drying period is one day or more, that is, if mid-drying has traditionally been carried out in paddy fields, the control unit 1a includes the extension date and time of the conventional mid-drying period in the work proposal information in step S35. Good too.

The farmer terminal device 3 receives the work proposal information from the rice field methane reduction support device 1, and displays the recommended mid-drought period for the rice fields indicated by the work proposal information on the display of the input/output interface.

As another example, the control unit 1a derives either the first correlation data or the second correlation data, and determines the optimal You may also determine the recommended mid-drying period. As another example, in order to reduce methane in paddy fields, the control unit 1a may perform water management operations such as intermittent irrigation of paddy fields, and perform crop maintenance in addition to or in place of drying the paddy fields and extending the drying period. It may be suggested to carry out agricultural activities such as plowing rice straw or applying compost after harvesting. Furthermore, AI and machine learning may be used to derive suggestions such as a recommended mid-drying period for rice fields, recommended water management work, plowing in rice straw, or application of compost.

FIG. 9 is a flowchart showing an example of the calculation formula updating operation of the rice field methane reduction support device 1. The calculation formula updating operation in FIG. 9 is an operation for updating the calculation formula for the amount of methane emissions from rice fields. For example, when the administrator of the rice field methane reduction support device 1 inputs an instruction to update the calculation formula corresponding to a certain rice field through the input/output interface 1d (S41 in FIG. 9), the control unit 1a updates the rice field information corresponding to the rice field. and work information from the agricultural management device 2 or farmer terminal device 3 (S42). Then, when there is a change in the information related to the calculation of methane emissions of the rice field among the information included in the acquired rice field information and work information (S43: YES), the control unit 1a responds to the change in the information. The formula for calculating the amount of methane emissions from the rice fields is updated (S44).

Specifically, for example, if there is a change in the drainage performance of the paddy field included in the paddy field information or the applied organic matter included in the work information, the control unit 1a changes the formula for calculating the amount of methane emissions from the paddy field in accordance with the change. The calculation formula is updated by changing the variables fd, fo, EF, a, and b in (FIG. 5) (S44).

Further, in conjunction with updating the above calculation formula, the control unit 1a may also update the basic methane emission amount. In addition, the operator operates the input/output interface 1d (mouse, keyboard, etc.) of the rice field methane reduction support device 1, and the storage section The model data stored in 1b may be updated.

FIG. 10 is a flowchart showing an example of the crediting operation of the rice field methane reduction support device 1. The credit conversion operation shown in FIG. 10 is an operation when converting the amount of methane reduction in rice fields into electronic credits, and shows the details of the process S4 in FIG. 3. After calculating the methane reduction amount in the rice field, the control unit 1a of the rice field methane reduction support device 1 generates report information including the methane reduction amount in the rice field and farmer information corresponding to the rice field, and transmits the report information to the communication unit. 1c to the credit management device 8 (S51 in FIG. 10).

At this time, the control unit 1a includes paddy field information regarding the paddy fields, conventional work information in the paddy fields (for example, work information from the past several years), and target work information (for example, work information for the past several years) indicating agricultural work that has been changed to reduce methane from the paddy fields. current year's work information), a fixed calculation formula for calculating methane emissions of rice fields set based on model data (formula with fixed variables of model formulas (1) and (2) in Figure 5), At least one of the variables in the calculation formula may be included in the report information and transmitted to the credit management device 8 by the communication unit 1c. In addition, when the variable in the above calculation formula is included in the report information, the control unit 1a also includes the data used to determine the variable (for example, a measured value such as daily water depth, and whether there was no rainfall at the time of measurement of the measured value). (e.g., weather information indicating the weather) may also be included in the report information. Furthermore, the conventional work information and target work information that the control unit 1a includes in the report information may include water management information such as the heading date of paddy rice grown in the paddy field and the mid-dry period of the paddy field.

When the credit management device 8 receives the report information from the rice field methane reduction support device 1, it issues a credit according to the amount of methane reduction in the rice field included in the report information, and transfers the credit information indicating the credit to the rice field methane reduction support device. Send to 1. At this time, the report information may be confirmed (verified), for example, by the credit management device 8 or the credit management company. At that time, there are cases where only the water management information of rice fields entered (declared) by the farmer is included in the report information, and cases where the report information includes only the water management information of the rice fields entered (declared) by the farmer. When objective water management information of detected rice fields (corroboration of water management status) is included in the report information, more credits are issued in the latter case than in the above case. , a difference may be made in the amount of credits to be issued.

The credit information from the credit management device 8 includes information such as the value of the credit, identification information (management number), and the owner of the credit. Upon receiving the credit information from the credit management device 8 (S52), the control unit 1a identifies the farmer who is the owner of the credit indicated by the credit information, and transmits the received information to the farmer terminal device 3 used by the farmer. The received credit information is transmitted (S53).

In the crediting operation of FIG. 10, the methane reduction amount is credited for each rice field, but in addition to this, the methane reduction amount of a plurality of rice fields may be credited all at once, as shown in FIG. 11, for example.

FIG. 11 is a flowchart showing another example of the crediting operation of the rice field methane reduction support device 1. The control unit 1a of the rice field methane reduction support device 1 adds up the methane reduction amount of a plurality of rice fields (S54 in FIG. 11), generates report information including the combined methane reduction amount, and sends the report information to the communication unit. 1c to the credit management device 8 (S51a).

Then, when the control unit 1a receives (obtains) credit information indicating credits issued from the credit management device 8 according to the total methane reduction amount through the communication unit 1c (S52a), the control unit 1a receives the credit indicated by the credit information. , and distribute it according to the amount of methane reduction in a plurality of rice fields (S55). Further, the control unit 1a newly generates credit information indicating the distributed credits, and transmits the credit information to the farmer terminal device 3 of the farmer corresponding to the plurality of rice fields through the communication unit 1c (S53a). .

Further, the control unit 1a estimates credits corresponding to the amount of methane reduction in the rice fields based on a predetermined calculation formula or predetermined table data, and includes provisional credit information indicating the estimated credits in the report information, and the communication unit 1c It may also be transmitted to the credit management device 8 by. The predetermined calculation formula or predetermined table data may be stored in advance in the storage unit 1b or the database 2d of the agricultural management device 2 (FIG. 1), for example. When a predetermined calculation formula or predetermined table data is stored in the database 2d, the control unit 1a may acquire (receive) the predetermined calculation formula or predetermined table data from the agricultural management device 2 through the communication unit 1c. .

Further, the control unit 1a may notify the farmer of the temporary credit information based on the farmer information. Specifically, the control unit 1a transmits temporary credit information to the farmer terminal device 3 used by the farmer, for example, through the communication unit 1c. The farmer terminal device 3 that has received the provisional credit information outputs the provisional credit information on a display or the like. This allows farmers to recognize temporary credit information.

The control unit 1a also includes, as the conventional work information and target work information to be included in the report information, the heading date of paddy rice grown in the paddy field and water management information such as the mid-drying period of the paddy field. There may also be information indicating the implementation date and implementation status of rice straw plowing and compost application. That is, in addition to water management operations such as drying rice fields, other operations that affect the amount of methane produced, such as controlling the amount or timing of plowing rice straw and applying organic fertilizers, were carried out. In this case, this will be reflected in the increase or decrease in the amount of credits issued due to the implementation of the work, and may be eligible for credit issuance.

More specifically, the control unit 1a or the like (or the credit management device 8 may be used) controls the amount and timing of at least one of plowing rice straw in the paddy field and applying organic fertilizer to the paddy field. The amount of credits issued for the amount of methane generated reduced by drying may be increased or decreased. In addition, if the amount or timing of at least one of rice straw plowing and organic fertilizer application is expected to be reduced by changing the amount or timing of at least one of rice straw plowing and organic fertilizer application, the amount of reduction will be Credits may be issued. For example, in paddy fields, if the timing of plowing in rice straw or applying organic fertilizer is changed from just before paddy rice planting to after the previous year's harvest, a falling water condition is maintained before irrigation to promote oxidative decomposition of organic matter. , the proportion of organic matter subject to anaerobic decomposition can be reduced.

FIG. 12 is a flowchart showing an example of the credit purchasing operation of the rice field methane reduction support device 1. The credit purchasing operation in FIG. 12 is an operation when purchasing credits from a farmer, and shows an example of the process S7 in FIG. 3. For example, when information indicating that a farmer wants to sell the credits he/she owns is inputted into the farmer terminal device 3, the farmer terminal device 3 generates sales wish information indicating that the farmer wants to sell the credits, and sells the credits. The desired information is transmitted to the rice field methane reduction support device 1. The information on the desire to sell includes not only the fact that the user wants to sell the credit, but also credit information indicating the value of the credit, the identification number, and the like.

When the control unit 1a of the rice field methane reduction support device 1 receives the sales information from the farmer terminal device 3 through the communication unit 1c (S61), it determines the price of the credit indicated by the sales information. At this time, there is a case where the credit indicated by the credit information is issued based only on the water management information of the rice field inputted by the farmer, and a case where the credit indicated by the credit information is issued based only on the water management information of the rice field inputted by the farmer. Even if there is a difference in the amount of consideration, such as when the credit is issued based on objective rice field water management information such as good.

Then, the control unit 1a outputs payment instruction information indicating an instruction to make a predetermined trader pay the determined price through the input/output interface 1d (S62). At this time, for example, the control unit 1a displays payment instruction information on a display included in the input/output interface 1d. Alternatively, the payment instruction information may be transferred to a transactor terminal device (not shown) used by a predetermined transactor.

Thereafter, when payment completion information indicating that the trader has paid the price to the farmer is input through the input/output interface 1d (mouse, keyboard, etc.) (S63), the control unit 1a The person is changed from the farmer to the trader and the credit is managed on behalf of the trader (S64). Further, the control unit 1a generates change report information including credit information indicating the corresponding credit and information indicating that the owner of the credit has been changed from a farmer to a trader, and transmits the change report information. The communication unit 1c transmits it to the credit management device 8 (S65).

Upon receiving the change report information from the rice field methane reduction support device 1, the credit management device 8 accepts a change in the owner of the credit indicated by the change report information, and updates the management information of the credit.

FIG. 13 is a flowchart showing an example of credit transaction operation of the rice field methane reduction support device 1. The credit transaction operation in FIG. 13 is an operation when selling credit to a consumer, and shows an example of the process S7 in FIG. 3. For example, when the control unit 1a of the rice field methane reduction support device 1 receives purchase request information indicating that the credit to be managed is to be purchased from the customer terminal device 9 used by the customer through the communication unit 1c (S71), A price for the credit indicated by the purchase request information is determined, and a payment instruction for making the consumer pay the price is transmitted to the consumer terminal device 9 (S72).

Thereafter, when the communication unit 1c receives payment completion information indicating that the consumer has paid the price to the transactor from the consumer terminal device 9 (S73), the control unit 1a transfers the owner of the corresponding credit to the transactor. The credit is changed from the credit to the consumer (S74), and the credit is removed from the management target. In addition, the control unit 1a generates change report information including credit information indicating the credit and information indicating that the owner of the credit has been changed from the transactor to the consumer, and communicates the change report information. The unit 1c transmits it to the credit management device 8 (S75).

In the above embodiment, an example was shown in which the agricultural management device 2 and the farmer terminal device 3 are external devices to the rice field methane reduction support device 1, but the present invention is not limited to this. For example, the rice field methane reduction support device 1 and the agricultural management device 2 may be configured with the same computer or server, or the rice field methane reduction support device 1 and the farmer terminal device 3 may be configured with the same computer or terminal device. You can also Furthermore, the rice field methane reduction support device 1, the agricultural management device 2, and the farmer terminal device 3 may be provided on the cloud so that they can input and output information to each other on the cloud. In this case, evaluation information indicating the amount of methane reduction in rice fields, work proposal information including the recommended drying period for rice fields, and credit information indicating credits according to the amount of methane reduction can be input and output on the same computer or on the cloud. You may.

Further, in order to calculate the amount of emissions and reductions of greenhouse gases other than methane (carbon dioxide, etc.) emitted from agricultural fields such as rice fields, a computer or the like constituting the rice field methane reduction support device 1 may be used. . In this case, model data for calculating the target greenhouse gas emissions and reduction amounts may be used.

By the way, in regions where crops such as rice are cultivated in paddy fields, abnormal water increases such as flooding may occur due to heavy rainfall during the rainy season. It is dangerous for farmers and others to approach rice fields when abnormally high water levels occur around them. For example, when water management work such as drying is carried out to reduce methane emissions from rice fields, if a drainage abnormality occurs in which water cannot drain from the rice fields due to blockages in the drains, the methane No reduction effect can be obtained. Furthermore, even if water supply work is carried out to the rice fields to complete drying of the rice fields, if a water supply abnormality occurs in which the rice fields are not flooded due to blockage of the water supply ports or water shortage, Yield will decrease. Therefore, by using the configuration shown in FIG. 14, for example, it is possible to quickly detect the occurrence of water management abnormality in rice fields as described above.

FIG. 14 is a configuration diagram of an example of the agricultural support system 100. This agricultural support system 100 has the same configuration as the rice field methane reduction support system 100 shown in FIG. 1 except for the land management terminal device 10. That is, the agricultural support system 100 constitutes a rice field methane reduction support system 100. Further, as described above, the rice field methane reduction support device 1 is composed of an information processing device such as a computer. The rice field methane reduction support device 1 is an information processing device that detects the occurrence of water management abnormalities in rice fields. Hereinafter, the rice field methane reduction support device 1 may be referred to as the information processing device 1.

The land management terminal device 10 includes a computer, a tablet terminal device, a smartphone, or the like used by an administrator who manages land around rice fields. The land manager may be an individual, a farming organization, a corporation, a local government in the area where the rice fields are located, or the like. In FIG. 14, one land management terminal device 10 is illustrated, but there may be two or more land management terminal devices 10.

The land management terminal device 10 includes a control unit (CPU), a storage unit (memory), a communication unit (communication interface), and an input/output interface (not shown). The land management terminal device 10 receives information regarding the land around the rice fields through the Internet or the like through the communication unit, and outputs (displays) the received information through the input/output interface.

FIG. 15 is a flowchart illustrating an example of the water management abnormality detection operation of the information processing device 1. The control unit 1a of the information processing device 1 executes the main water management abnormality detection operation at a predetermined period at a predetermined time such as the rainy season, for example. First, the control unit 1a uses the communication unit 1c to acquire rice field information and work information corresponding to the target rice field from the agricultural management device 2 or the farmer terminal device 3 used by the farmer corresponding to the rice field (S121). The communication unit 1c is an example of an acquisition unit and an output unit.

Further, the control unit 1a acquires detected water management information indicating the water management state of the rice field detected by the water management device 4 or the monitoring device 6 from the agricultural management device 2 through the communication unit 1c (S122). The detected water management information includes at least one of the detection results of the water level sensor 5 that detects the water level of the rice fields and the observation results (radar images) of the earth observation satellite 7 that observes the area where the rice fields are located. .

Next, the control unit 1a identifies target water management information indicating the target water management state of the rice field from the acquired work information (S123). At this time, the control unit 1a reads, for example, the implementation status (water management status) of water management work such as flooding, irrigation, and falling water in the rice field from the implementation status of agricultural work included in the work information, and uses the implementation status to set the goal for the rice field. It is determined whether the surface condition is a water surface or not, and the determination result is specified as target water management information. Alternatively, the control unit 1a may specify, as the target water management information, for example, the target water level of the rice field, or the area of the area where the surface of the rice field is the water surface.

Next, the control unit 1a determines whether there is a water management abnormality based on the difference between the target water management information and the detected water management information (S124). At this time, the control unit 1a specifies, for example, the target water level of the rice field from the target water management information, and specifies the actual water level (actual value of the water level) of the rice field from the detection result of the water level sensor 5 included in the detected water management information. Then, when the actual water level in the rice field is higher than the target water level by a first predetermined value or more, the control unit 1a determines that a water management abnormality (abnormal water increase) has occurred in the rice field. Further, if a second predetermined value that is larger than the first predetermined value is set and the actual water level of the paddy field is higher than the target water level by the second predetermined value or more, the control unit 1a determines that a flood has occurred in and around the paddy field. It's okay. On the other hand, if the actual water level in the rice field is not higher than the target water level by the first predetermined value or more, the control unit 1a determines that no water management abnormality has occurred in the rice field.

As another example, the control unit 1a identifies the target water management state of the rice field from the target water management information, and determines whether the surface of the rice field is a water surface from the observation results of the earth observation satellite 7 included in the detected water management information. Specify whether or not. Then, the control unit 1a determines that the target water management state of the paddy field is a falling water state in which no water is filled in the paddy field (a state in which the water level is substantially zero), and based on the observation results of the earth observation satellite 7, the surface of the paddy field is If it is determined that the water is on the water surface, it is determined that a water management abnormality (abnormal water drainage such as drainage abnormality in the paddy field or abnormal increase in water such as flooding around the paddy field) has occurred in the paddy field. In addition, if the target water management state of the rice field is a falling water state in which the rice field is not filled with water, and the surface of the rice field is not a water surface from the observation results of the earth observation satellite 7, the control unit 1a determines that there is a water management abnormality in the rice field. It is determined that this has not occurred.

As another example, the control unit 1a identifies the position of the rice field from the rice field information, and calculates the target water surface area of the rice field whose surface becomes the water surface from the target water management information. In addition, the control unit 1a determines whether the surface of the paddy field and the land around the paddy field is a water surface based on the observation results of the earth observation satellite 7, and calculates the area of the paddy field and land whose surface is a water surface. Calculate the actual water surface area. For example, if water overflows from the paddy field into the surrounding land due to heavy rain and the actual water surface area becomes larger than the target water surface area by a predetermined value or more, the control unit 1a will cause a water management abnormality ( It is determined that an abnormal water rise (such as a flood) has occurred. Furthermore, if the actual water surface area is not larger than the target water surface area by a predetermined value or more, the control unit 1a determines that no water management abnormality has occurred in or around the rice fields.

Furthermore, although the above example shows an example in which drainage abnormality or abnormal water increase is detected as a water management abnormality in a rice field, the control unit 1a determines a water supply abnormality in a rice field from the difference between the target water management information and the detected water management information. You can also do it. For example, the control unit 1a determines that a water supply abnormality (water management abnormality) has occurred in the rice field when the actual water level of the rice field is lower than the target water level by a third predetermined value or more. The third predetermined value is set smaller than the first predetermined value. Furthermore, if the target water management state of the paddy field is a flooded state, but the surface of the paddy field is determined to be not a water surface based on the observation results of the earth observation satellite 7, a water supply abnormality occurs in the paddy field. I judge that I did.

When the control unit 1a determines that a water management abnormality has occurred as described above (S125: YES), the communication unit 1c outputs water management abnormality information indicating that a water management abnormality has occurred in and around the rice fields ( S126). At this time, the control unit 1a may include the details of the water management abnormality, target water management information, detected water management information, etc. in the water management abnormality information.

Further, the control unit 1a acquires farmer information regarding a farmer corresponding to a rice field, for example, from the agricultural management device 2 or the farmer terminal device 3 using the communication unit 1c, and communicates water management abnormality information based on the farmer information. The information may be transmitted (output) to the farmer terminal device 3 by the unit 1c. In this case, upon receiving the water management abnormality information, the farmer terminal device 3 displays the water management abnormality information on the input/output interface, thereby informing the farmer that a water management abnormality has occurred in the rice field (and around the rice field). Notify the person. At this time, if the water management abnormality information indicates that a flood has occurred as a water management abnormality, the farmer terminal device 3 sends a warning (message, etc.) to the farmer indicating that he should not go near the rice field due to a flood. may be notified. Note that the control unit 1a may acquire farmer information through the communication unit 1c before determining that a water management abnormality has occurred.

Further, when the control unit 1a determines that a flood has occurred as a water management abnormality in the rice field, the control unit 1a transmits land management information including information indicating the manager of the land around the rice field from the agricultural management device 2 or the land management terminal device 10. The water management abnormality information may be acquired by the communication unit 1c and transmitted (output) to the land management terminal device 10 by the communication unit 1c based on the land management information. When the land management terminal device 10 receives the water management abnormality information, it displays the water management abnormality information on the input/output interface, thereby informing the management of the land surrounding the rice fields that a flood has occurred in and around the rice fields. Notify the person. At this time as well, the farmer terminal device 3 may notify the farmer of a warning (such as a message) indicating that the farmer should not go near the rice field because of a flood. Note that the control unit 1a may acquire land management information from the communication unit 1c before determining that a flood has occurred.

Further, the control unit 1a may output water management abnormality information indicating that a flood has occurred to the agricultural management device 2 through the communication unit 1c. Further, the information processing device 1, agricultural management device 2, and land management terminal device 10 access a predetermined provider and display water management abnormality information indicating that a flood has occurred on a predetermined homepage on the Internet. Good too. In addition, the control unit 1a directly or instructs the agricultural management device 2 to issue a water supply and drainage command to the water management device 5 corresponding to the rice field in which the water management abnormality has occurred, instructing it to execute a water supply and drainage operation to eliminate the water management abnormality. It may also be sent via. When the water management device 5 receives the water supply and drainage command, it operates an actuator based on the water supply and drainage command to drain water or supply water to the rice field.

The water management abnormality detection operation described above may be executed by the control unit 1a for one paddy field, or may be executed for a plurality of paddy fields. In addition, when the control unit 1a determines that an abnormal water increase (water management abnormality) has occurred in a plurality of rice fields within a predetermined range, it is determined that a flood has occurred in the area where the rice fields are located, and the control unit 1a determines that a flood has occurred in the area where the rice fields are located. If it is determined that an abnormal increase in water has occurred in one of the rice fields, and it is determined that an abnormal increase in water has not occurred in the other rice field, it may be determined that no flooding has occurred in the area where the rice fields are located.

In addition, when the control unit 1a determines that an abnormal increase in water (water management abnormality) has occurred in the paddy field, the communication unit 1c communicates with the agricultural management device 2 or the water management device 4 corresponding to the paddy field, and Alternatively, it may be confirmed whether a drainage error has occurred in the drainage sluice gate that prevents normal drainage. For example, the control unit 1a transmits a request signal requesting transmission of error information corresponding to a rice field to the agricultural management device 2 or the water management device 4 through the communication unit 1c. When the communication unit 1c receives error information indicating that a drainage error has occurred from the agricultural management device 2 or the water management device 4, it is determined that an abnormal water increase has occurred in the rice field due to a drainage error. Furthermore, if the control unit 1a does not receive error information from the agricultural management device 2 or the water management device 4, it determines that the abnormal increase in water in the rice fields is not due to a discharge error but is a flood caused by heavy rain or the like. That is, after confirming that the abnormal increase in water in the rice field is not due to a drainage error, the control unit 1a determines that the abnormal increase in water is due to flooding around the rice field.

In addition, when the control unit 1a determines whether there is an abnormal increase in water in a rice field using the observation results of the earth observation satellite 7, that is, a radar image (SAR satellite image), a radar image when the surface of the rice field is a water surface, A threshold value for determining whether the surface of the rice field is a water surface may be set based on a radar image when the surface of the rice field is not a water surface. In addition, the threshold value may be used to determine whether the surface of land other than rice fields, such as other fields (fields), roads, residential areas, industrial parks, riverbeds, etc., is a water surface. . The water management abnormality detection operation shown in FIG. 15 may be applied when determining the presence or absence of abnormal water rise (or flooding) in land other than rice fields. In this case, the control unit 1a detects the presence or absence of abnormal water rise (or flooding) in various target locations by detecting the actual water level and water surface condition of the target locations, for example, from the observation results of the earth observation satellite 7. Moreover, the presence or absence of abnormal water rise (or flooding) can be detected over a wide range without installing a water level sensor 5 or the like in the target area.

In the embodiment described above, an example was shown in which the information processing device constituting the rice field methane reduction support device 1 executed the water management abnormality detection operation, but instead of this, the information processing device constituting the agricultural management device 2 A water management abnormality detection operation may also be performed. Alternatively, an information processing device different from the rice field methane reduction support device 1 and the agricultural management device 2 may perform the water management abnormality detection operation.

The rice field methane reduction support device 1 and the rice field methane reduction support system 100 of the present embodiment described above have the following configurations and are effective.

The rice field methane reduction support device 1 of this embodiment includes a storage unit 1b that stores model data (FIG. 5) for calculating the amount of methane emissions from the rice fields, and calculates the amount of methane emissions from the rice fields based on the model data. The control unit 1a acquires farmer information regarding a farmer and work information regarding agricultural work for cultivating crops in a paddy field corresponding to the farmer information, and acquires the work information. Calculate the amount of methane reduced from the predetermined basic methane emissions of rice fields based on the implementation status of agricultural operations included in.

In addition, the rice field methane reduction support system 100 of the present embodiment includes a rice field methane reduction support device 1 that supports the reduction of methane emissions from rice fields, and a database 2d that stores information regarding a plurality of rice fields and a plurality of farmers. and an agricultural management device 2.

According to the above configuration, the amount of methane reduction in the rice field is quantitatively evaluated by the rice field methane reduction support device 1 when the farmer changes the implementation status of agricultural work in the rice field, so convenience can be improved. can. This will also encourage farmers to take steps to reduce methane from rice fields, making it possible to activate methane reduction in the agricultural sector.

In this embodiment, the control unit 1a calculates the amount of methane reduction in the rice field based on water management information included in the work information and indicating the water management state of the rice field. As a result, farmers can quantitatively evaluate the amount of methane reduction in rice fields by the rice field methane reduction support device 1 by changing the implementation status of water management work such as intermittent irrigation or mid-drying of rice fields, improving convenience. can be done.

Further, in the present embodiment, the control unit 1a identifies a dry state during crop cultivation in the paddy field based on water management information indicating flooding, irrigation, and overwatering of the paddy field, and identifies a dry state during crop cultivation in the paddy field. Calculate the amount of methane reduction in rice fields. As a result, when farmers carry out mid-drying of rice fields or extend the mid-drying period, the rice field methane reduction support device 1 quantitatively evaluates the amount of methane reduction in the rice fields, improving convenience. be able to.

Further, in the present embodiment, the control unit 1a notifies the farmer of evaluation information indicating the amount of methane reduction in the rice field based on the farmer information. Further, in one embodiment, the control unit 1a transmits evaluation information indicating the amount of methane reduction in the rice field to the farmer terminal device 3 based on the farmer information using the communication unit 1c. As a result, farmers can easily grasp the methane reduction effect caused by changing the implementation status of agricultural work in rice fields, and can improve convenience.

Further, in the present embodiment, the control unit 1a acquires rice field information regarding the rice fields, sets a calculation formula for calculating the methane emissions of the rice fields based on the rice field information, work information, and model data, and Based on the conventional water management information of The basic methane emission amount is stored in the storage unit 1b in association with the rice field information, the dry state of the rice field is specified based on the changed water management information of the rice field, and the dry state of the rice field is combined with the calculation formula. Based on this, the methane emissions from the rice fields are calculated, and the methane emissions are subtracted from the basic methane emissions from the rice fields to calculate the amount of methane reduction from the rice fields. This will reduce the amount of methane emissions from rice fields compared to the basic methane emissions by changing the actual drying period, such as extending the actual drying period compared to the basic drying state of rice fields. The amount can be calculated.

In addition, in the present embodiment, each time the basic drying period included in the basic drying state of paddy fields is extended at a predetermined interval before and after in the simulation, the control unit 1a calculates the calculation formula for the medium drying period after the extension and the paddy field. The amount of methane reduction is calculated based on the basic dry period and the basic methane emission amount, the correlation between the dry period of rice fields and the amount of methane reduction is derived, and the first correlation data indicating the correlation is stored in the storage unit. 1b, a mid-dry period of the paddy field is specified based on the changed water management information of the paddy field, and a methane reduction amount of the paddy field is calculated based on the mid-dry period and the first correlation data. Thereby, the methane reduction amount can be easily calculated based on the mid-dry period and the first correlation data without calculating the methane emission amount of the rice fields.

Further, in the present embodiment, the control unit 1a updates the calculation formula for the paddy field in response to a change in at least one of the paddy field information and work information of the paddy field. As a result, the first correlation data indicating the correlation between the basic methane emissions of the rice fields or the dry period and the amount of methane reduction can also be updated, making it possible to improve the accuracy of the amount of methane reduction in the rice fields.

In addition, in this embodiment, the rice field methane reduction support device 1 includes a communication unit 1c that communicates with an external device, and the control unit 1a has a database 2d that stores information regarding a plurality of rice fields and a plurality of farmers. The communication unit 1c acquires farmer information and paddy field information and work information of the paddy field corresponding to the farmer information from at least one of the agricultural management device 2 and the farmer terminal device 3 used by the farmer. , the detection devices 4 and 6 (water management device 4, monitoring device 6), agricultural management device 2, and farmer terminal device 3 corresponding to farmer information. The water management information of the rice fields is acquired by the communication unit 1c. As a result, the rice field methane reduction support device 1 can accurately determine the mid-dry state based on the water management information indicating the water management state of the rice field acquired from the detection devices 4 and 6, the agricultural management device 2, or the farmer terminal device 3. can be specified.

Moreover, in this embodiment, the farmer terminal device 3 is configured to be able to input at least one of farmer information, work information, and rice field information. Therefore, even if there is a change in farmer information, work information, or rice field information, the farmer can immediately input the changed farmer information, work information, or rice field information. Further, the farmer can input, using the farmer terminal device 3, work information including water management information indicating the water management state of the rice fields that cannot be detected by the detection devices 4 and 6. Then, the rice field methane reduction support device 1 can identify the dry state based on the water management information of the rice field.

Further, in this embodiment, the detection device 4 (water management device 4) detects the water management state during crop cultivation in the paddy field from the detection result of the water level sensor 5 that detects the water level in the paddy field, and the control unit 1a The water management information indicating the water management state of the rice field detected by the detection device 4 is acquired periodically or at a predetermined timing, and the dry state of the rice field is identified based on the plurality of acquired water management information. . Thereby, based on the water level detection result of the rice field by the water level sensor 5, the water management status of the rice field including flooding, irrigation, and falling water is accurately detected, and based on the water management information indicating the water management status, the rice field is It is possible to more accurately identify the mid-dry state of

In the present embodiment, the detection device 6 (monitoring device 6) detects the water management status during crop cultivation in the paddy field based on the observation results of the paddy field by the flying object or the observation device (earth observation satellite) 7 mounted on the flying object. , the control unit 1a periodically or at a predetermined timing acquires water management information indicating the water management state of the paddy field detected by the detection device 6, and based on the acquired plurality of water management information. , to identify the dry state of rice fields. As a result, the water management status of flooding, irrigation, and falling water in the rice field can be accurately detected based on the observation results of the rice field by the observation device 7, and the water management status of the rice field can be accurately detected based on the water management information indicating the water management status. The dry state can be identified more accurately. Furthermore, since it is not necessary to install a device for detecting water management conditions in the rice field, the cost for installing the device can be reduced.

Furthermore, in this embodiment, the observation device 7 includes a synthetic aperture radar. As a result, rice fields can be observed using synthetic aperture radar without being affected by weather or clouds, and based on the observation results, the water management status of rice fields such as flooding, irrigation, or falling water can be accurately detected. Based on the water management information indicating the water management state, it is possible to more accurately identify the dry state of the rice fields.

Furthermore, in the present embodiment, the control unit 1a determines a recommended dry period for rice fields in which the amount of methane reduction is equal to or greater than a predetermined value, based on first correlation data indicating the correlation between the dry period of rice fields and the amount of methane reduction. Based on the farmer's information, the farmer is notified of work proposal information including the recommended mid-drying period. This will notify farmers of the recommended mid-drying period suitable for reducing methane from paddy fields, so farmers can easily reduce methane from paddy fields by carrying out mid-drying of paddy fields based on the recommended mid-drying period. In addition, it is possible to effectively reduce the amount, and it becomes possible to further improve convenience.

Further, in the present embodiment, the control unit 1a estimates the basic yield of crops in the paddy field based on the basic dry period of the paddy field, the paddy field information and the work information corresponding to the paddy field, and performs a simulation to calculate the basic dry period of the paddy field. Each time the period is extended at predetermined intervals, the yield of crops in the paddy field is estimated based on the mid-dry period after the extension, the paddy field information and the work information of the paddy field, and the yield is estimated based on the yield and the basic yield. The yield loss of the crop is calculated, the correlation between the dry period of the paddy field and the yield loss of the previous crop is derived, second correlation data indicating the correlation is stored in the storage unit 1b, and the first correlation data and the second correlation data are stored. Based on the correlation data, a recommended mid-drying period for rice fields in which the amount of methane reduction is greater than or equal to a first predetermined value and the amount of crop yield reduction is less than or equal to a second predetermined value is determined. As a result, farmers will be notified of the recommended drying period that balances the amount of methane reduction in rice fields with crop yield, making it easier for farmers to carry out drying of rice fields based on the recommended drying period. As a result, it is possible to reduce methane from rice fields while keeping the loss of crop yields low, making it possible to further improve convenience.

Further, in the present embodiment, the control unit 1a transmits report information including the amount of methane reduction in the rice fields and farmer information corresponding to the rice fields to the credit management device 8 through the communication unit 1c, and reports the amount of methane reduction in the rice fields. Accordingly, the communication unit 1c acquires credit information indicating the electronic credit issued from the credit management device 8, and notifies the farmer of the credit information based on the farmer information. As a result, farmers can obtain credits based on the amount of methane reduced due to changes in farming practices in rice fields without having to go through complicated procedures, improving convenience and profitability for farmers. becomes possible.

Further, in the present embodiment, the control unit 1a adds up the methane reduction amount of a plurality of rice fields, transmits report information indicating the combined methane reduction amount to the credit management device 8 through the communication unit 1c, and The communication unit 1c acquires credit information indicating credits issued from the credit management device 8 according to the amount of methane reduction that has been made, and distributes the credits indicated by the credit information according to the amount of methane reduction of a plurality of rice fields, Credit information indicating the distributed credits is notified to farmers corresponding to each of the plurality of rice fields based on the farmer information. As a result, farmers can receive credits in a lump sum based on the amount of methane reduced due to changes in farming practices, without having to go through complicated procedures for each rice field. Even if the amount of methane reduction is small, credits can be obtained according to the amount of methane reduction. Therefore, it becomes possible to further improve convenience and usefulness for farmers.

Further, in the present embodiment, the control unit 1a makes settings based on rice field information regarding rice fields, conventional work information in the rice fields, target work information indicating agricultural work that has been changed to reduce methane from the rice fields, and model data. At least one of the calculation formula for calculating the amount of methane emissions from the rice fields and the variables included in the calculation formula is included in the report information and transmitted to the credit management device 8 by the communication unit 1c. As a result, the credit management company can verify the amount of methane reduction included in the report information, using the rice field information, work information, calculation formula, or variable included in the report information received by the credit management device 8, and It is possible to judge the validity of the amount and issue credits legitimately.

Further, in the present embodiment, the control unit 1a estimates credits according to the amount of methane reduction in rice fields, includes provisional credit information indicating the estimated credits in report information, and transmits the report information to the credit management device 8 through the communication unit 1c. , or notify the farmer of the provisional credit information based on the farmer information. This allows the rice field methane reduction support device 1 to manage the credit estimate according to the amount of methane reduction in the rice field, or allows the farmer to grasp the estimate.

In addition, in this embodiment, the rice field methane reduction support device 1 includes an input/output interface 1d for inputting and outputting information, and the control unit 1a sends sale wish information indicating that the farmer wants to sell credits owned by the farmer. When received by the communication unit 1c from the farmer terminal device 3, the input/output interface 1d outputs payment instruction information indicating an instruction to make a predetermined trader pay the price of the credit indicated by the relevant sale information, and the trader When payment completion information indicating that the price has been paid to the farmer is input through the input/output interface 1d, the owner of the credit is changed from the farmer to the trader. This allows farmers to easily obtain compensation for the credits they own without having to deal with credits directly with consumers through complicated procedures, further improving convenience and profitability for farmers. becomes.

Further, in the present embodiment, when the communication unit 1c receives purchase request information indicating that the customer wants to purchase credits from the consumer terminal device 9 used by the customer, the control unit 1a receives the purchase request information indicated by the purchase request information. A payment instruction to make the consumer pay the price is sent to the consumer terminal device 9, and payment completion information indicating that the consumer has paid the price to the transaction person is received by the communication unit 1c from the consumer terminal device 9. Then, the owner of the credit is changed from the transactor to the consumer. As a result, credits issued according to the amount of methane reduction in rice fields can be easily traded with consumers, making it possible to further improve convenience.

The information processing device 1 of the present embodiment shows work information related to agricultural work for cultivating crops in a paddy field and the water management status of the paddy field detected by the detection devices 4 and 6 (water management device 4 and monitoring device 6). The acquisition unit (communication unit) 1c that acquires the detected water management information detects a water management abnormality in the rice field based on the difference between the target water management information indicating the water management status of the rice field identified from the work information and the detected water management information. The water management system includes a control unit 1a that determines whether or not a water management abnormality has occurred, and an output unit (communication unit) 1c that outputs water management abnormality information indicating that a water management abnormality has occurred. Further, the agricultural support system 100 of this embodiment includes detection devices 4 and 6 and an information processing device 1.

With the above configuration, it is possible to quickly detect that a water management abnormality has occurred in a rice field from the target water management information of the rice field and the detected water management information detected by the detection devices 4 and 6. In addition, water management abnormality information indicating that water management abnormalities have occurred in rice fields can be output and notified to related parties, allowing farmers and others to appropriately deal with water management abnormalities in rice fields. .

Further, in the present embodiment, the detected water management information includes the detection result of the water level sensor 5 that detects the water level of the rice field, and the control unit 1a specifies the target water level of the rice field from the target water management information, The actual water level of the rice field is determined from the detection result of the water level sensor, and if the actual water level is higher than the target water level by a predetermined value or more, it is determined that a water management abnormality has occurred in the rice field. With this, for example, when the water level of a rice field increases abnormally due to heavy rain, it is possible to reliably and quickly detect that a water management abnormality such as a flood has occurred.

Further, in this embodiment, the detected water management information includes the observation results of the observation device (earth observation satellite) 7 that observes the area where the rice fields are located, and the control unit 1a controls the detection of the rice fields from the target water management information. The target water management state is specified, and from the observation results of the observation device 7 it is determined whether or not the surface of the rice field is a water surface. When it is determined that the surface of the rice field is a water surface from the observation results of the device 7, it is determined that a water management abnormality has occurred in the rice field. For example, if a farmer unintentionally causes a flood in which water accumulates in a rice field due to heavy rainfall and then the water overflows around the rice field, it can be confirmed reliably and quickly that the flood has occurred. can be detected.

Further, in this embodiment, the detected water management information includes the observation results of the observation device 7 that observes an area where at least one rice field is located, and the control unit 1a uses the acquisition unit 1c to obtain rice field information regarding the rice field. The position of the rice field is determined from the rice field information, the target water surface area of the rice field where the surface becomes the water surface is calculated from the target water management information, and the area of the rice field and the land around the rice field is determined from the observation results of the observation device 7. It is determined whether the surface is a water surface or not, and the actual water surface area is calculated by combining the areas of paddy fields and land whose surfaces are water surfaces. If the actual water surface area is larger than the target water surface area by a predetermined value or more, the paddy field It is determined that a water management abnormality has occurred. As a result, for example, when water overflows from a paddy field into surrounding land due to heavy rainfall and a water management abnormality such as a flood occurs in that land, it is possible to reliably and quickly detect that the water management abnormality has occurred. can.

Further, in the present embodiment, the control unit 1a acquires farmer information regarding the farmer corresponding to the rice field using the acquisition unit 1c, and when it is determined that a water management abnormality has occurred, the control unit 1a sends water to the farmer based on the farmer information. The management abnormality information is notified by the output unit 1c. As a result, farmers and the like can reliably recognize that a water management abnormality has occurred in or around a rice field, and can appropriately deal with the water management abnormality.

Furthermore, in the present embodiment, the control unit 1a acquires land management information including information indicating the manager of the land around the rice field using the acquisition unit 1c, and when it is determined that a water management abnormality has occurred, the control unit 1a changes the land management information to the land management information. Based on this, the water management abnormality information is notified to the administrator by the output unit 1c. Thereby, the manager of the land around the rice field can reliably recognize that a water management abnormality has occurred in or around the rice field, and can appropriately deal with the water management abnormality. In addition, if the water management abnormality is an abnormal increase in water such as a flood, land managers etc. can inform the local people that the abnormal increase in water has occurred, so that the local people can can be prevented from approaching.

Although the present invention has been described above, the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 Rice field methane reduction support device, information processing device 1a Control unit 1b Storage unit 1c Communication unit (acquisition unit, output unit)
1d Input/output interface 2 Agricultural management device (external device, information processing device)
2d Database 3 Farmer terminal device (external device)
4 Water management device (external device, detection device)
5 Water level sensor 6 Monitoring device (external device, detection device)
7 Earth observation satellite (observation equipment)
8 Credit management device (external device)
9 Consumer terminal device (external device)
100 Paddy field methane reduction support system, agricultural support system H Paddy field R Paddy rice (crop)

Claims (31)

A storage unit that stores model data for calculating methane emissions from rice fields;
a control unit that calculates methane emissions from the rice field based on the model data,
The control unit acquires farmer information regarding the farmer and work information regarding agricultural work for cultivating crops in the paddy field corresponding to the farmer information, and determines the implementation state of the agricultural work included in the work information. A rice field methane reduction support device that calculates a methane reduction amount reduced from a predetermined basic methane emission amount of the rice field based on the rice field. The rice field methane reduction support device according to claim 1, wherein the control unit calculates the methane reduction amount of the rice field based on water management information included in the work information and indicating a water management state of the rice field. The control unit identifies a semi-dry state during crop cultivation in the paddy field based on the water management information indicating flooding, irrigation, and falling water in the paddy field, and determines the dry state of the paddy field based on the semi-dry state. The rice field methane reduction support device according to claim 2, which calculates a methane reduction amount. The rice field methane reduction support device according to any one of claims 1 to 3, wherein the control unit notifies the farmer of evaluation information indicating the amount of methane reduction in the rice field based on the farmer information. The control unit includes:
acquiring rice field information regarding the rice field, and setting a calculation formula for calculating methane emissions of the rice field based on the rice field information, the work information, and the model data;
setting a basic dry state of the rice field based on the conventional water management information of the rice field;
Calculating the basic methane emission amount of the rice field based on the calculation formula and the basic dry state,
storing the calculation formula, the basic dry state, and the basic methane emission amount in the storage unit in association with the rice field information;
identifying the semi-dry state of the rice field based on the changed water management information of the rice field;
Calculating the methane emissions of the rice field based on the dry state of the rice field and the calculation formula,
The rice field methane reduction support device according to claim 3, wherein the methane emission amount is subtracted from the basic methane emission amount of the rice field to calculate the methane reduction amount of the rice field. The control unit includes:
acquiring rice field information regarding the rice field, and setting a calculation formula for calculating methane emissions of the rice field based on the rice field information, the work information, and the model data;
setting the basic semi-dry state of the rice field based on the conventional water management information of the rice field;
Calculating the basic methane emission amount of the rice field based on the calculation formula and the basic dry state,
storing the calculation formula, the basic dry state, and the basic methane emission amount in the storage unit in association with the rice field information;
Each time the basic mid-dry period included in the basic mid-dry state of the paddy field is extended at predetermined intervals before and after in the simulation, the mid-dry period after the extension, the calculation formula for the paddy field, the basic mid-dry period, and the The methane reduction amount is calculated based on the basic methane emission amount, a correlation between the dry period of the rice field and the methane reduction amount is derived, and first correlation data indicating the correlation is stored in the storage unit. let me remember,
The method further comprises: identifying a mid-dry period of the paddy field based on the changed water management information of the paddy field, and calculating a methane reduction amount of the paddy field based on the mid-dry period and the first correlation data. 3. The rice field methane reduction support device described in 3. The rice field methane reduction support device according to claim 5 or 6, wherein the control unit updates the calculation formula for the rice field in accordance with a change in at least one of the rice field information and the work information of the rice field. Equipped with a communication unit that communicates with external devices,
The control unit includes:
The farmer information and the farmer concerned are acquired from at least one of an agricultural management device in which a database storing information about a plurality of rice fields and a plurality of farmers is stored, and a farmer terminal device used by the farmer. acquiring the paddy field information and the work information of the paddy field corresponding to the information by the communication unit;
The communication unit acquires the water management information of the rice field corresponding to the farmer information from at least one of the detection device that detects the water management state of the rice field, the agricultural management device, and the farmer terminal device. The rice field methane reduction support device according to claim 5 or 6. The detection device detects the water management state during crop cultivation in the rice field from the detection result of a water level sensor that detects the water level of the rice field,
The control unit acquires the water management information indicating the water management state of the rice field detected by the detection device periodically or at a predetermined timing, and based on the acquired plurality of water management information. 9. The rice field methane reduction support device according to claim 8, wherein the rice field methane reduction support device identifies the dry state of the rice field. The detection device detects the water management state during crop cultivation in the paddy field from observation results of the paddy field by a flying object or an observation device mounted on the flying object,
The control unit acquires the water management information indicating the water management state of the rice field detected by the detection device periodically or at a predetermined timing, and based on the acquired plurality of water management information. 9. The rice field methane reduction support device according to claim 8, wherein the rice field methane reduction support device identifies the dry state of the rice field. The rice field methane reduction support device according to claim 10, wherein the observation device has a synthetic aperture radar. The control unit includes:
acquiring rice field information regarding the rice field, and setting a calculation formula for calculating methane emissions of the rice field based on the rice field information, the work information, and the model data;
setting a basic dry state of the rice field based on the conventional water management information of the rice field;
Calculating the basic methane emission amount of the rice field based on the calculation formula and the basic dry state,
Each time the basic mid-dry period included in the basic mid-dry state of the paddy field is extended at predetermined intervals before and after in the simulation, the mid-dry period after the extension, the calculation formula for the paddy field, the basic mid-dry period, and the The methane reduction amount is calculated based on the basic methane emission amount, a correlation between the dry period of the rice field and the methane reduction amount is derived, and first correlation data indicating the correlation is stored in the storage unit. let me remember,
Based on the first correlation data, determining a recommended mid-drought period for the rice field during which the methane reduction amount is equal to or greater than a predetermined value;
The rice field methane reduction support device according to claim 3, wherein the farmer is notified of work proposal information including the recommended drying period based on the farmer information. The control unit includes:
Estimating the basic yield of the crop in the paddy field based on the basic mid-dry period of the paddy field, the paddy field information, and the work information,
Each time the basic mid-dry period of the paddy field is extended at predetermined intervals in the simulation, the crops of the paddy field are determined based on the extended mid-dry period, the paddy field information, and the work information of the paddy field. Estimate the yield, calculate the yield loss of the crop based on the yield and the basic yield, derive a correlation between the mid-dry period of the paddy field and the yield decrease of the crop, and show the correlation. storing second correlation data in the storage unit;
Based on the first correlation data and the second correlation data, determine the recommended mid-drought period for the paddy field during which the methane reduction amount is at least a first predetermined value and the yield loss of the crops is at most a second predetermined value. The rice field methane reduction support device according to claim 12, which makes a determination. Equipped with a communication unit that communicates with external devices,
The control unit includes:
transmitting report information including the methane reduction amount of the rice field and the farmer information corresponding to the rice field to a credit management device by the communication unit;
acquiring credit information indicating an electronic credit issued by the credit management device according to the methane reduction amount by the communication unit;
The rice field methane reduction support device according to claim 1, wherein the credit information is notified to the farmer based on the farmer information. Equipped with a communication unit that communicates with external devices,
The control unit includes:
summing the methane reduction amounts of the plurality of rice fields and transmitting report information indicating the combined methane reduction amount to the credit management device by the communication unit;
acquiring credit information indicating credits issued by the credit management device according to the total methane reduction amount by the communication unit;
Distributing the credits indicated by the credit information according to the amount of methane reduction in the plurality of rice fields;
The rice field methane reduction support device according to claim 1, wherein credit information indicating the distributed credits is notified to the farmers corresponding to each of the plurality of rice fields based on the farmer information. The control unit sets the settings based on the rice field information regarding the rice field, the conventional work information in the rice field, the target work information indicating the agricultural work changed to reduce methane from the rice field, and the model data. 15. The reporting information includes at least one of a calculation formula for calculating the methane emission amount of the rice field and a variable included in the calculation formula, and is transmitted to the credit management device by the communication unit. Or the rice field methane reduction support device according to claim 15. The control unit estimates the credit according to the amount of methane reduction in the rice field, includes temporary credit information indicating the estimated credit in the report information, and transmits the report information to the credit management device through the communication unit, or The rice field methane reduction support device according to claim 14 or 15, wherein credit information is notified to the farmer based on the farmer information. Equipped with an input/output interface for inputting and outputting information,
The control unit includes:
When the communication unit receives sale request information indicating that the farmer wants to sell the credit owned by the farmer from the farmer terminal device used by the farmer, the communication unit receives a predetermined price for the credit indicated by the sale request information. outputting payment instruction information indicating an instruction to make payment to the transaction person through the input/output interface;
When payment completion information indicating that the transaction person has paid the price to the farmer is input through the input/output interface, the owner of the credit is changed from the farmer to the transaction person. The rice field methane reduction support device according to 14 or 15. The control unit includes:
When the communication unit receives purchase request information indicating that the customer wishes to purchase the credit from a customer terminal device used by the customer, a payment instruction is issued to cause the customer to pay the price of the credit indicated by the purchase request information. to the consumer terminal device,
When the communication unit receives payment completion information indicating that the consumer has paid the price to the trader from the consumer terminal device, the owner of the credit is changed from the trader to the consumer. The rice field methane reduction support device according to claim 14 or 15. A rice field methane reduction support device that supports the reduction of methane emissions from rice fields,
an agricultural management device in which a database storing information regarding a plurality of rice fields and a plurality of farmers is constructed;
The rice field methane reduction support device is
a communication unit that communicates with an external device;
A storage unit that stores model data for calculating methane emissions from rice fields;
a control unit that calculates methane emissions from the rice field based on the model data,
The control unit receives farmer information regarding the farmer from at least one of the agricultural management device and a farmer terminal device used by the farmer, and cultivates crops in the paddy field corresponding to the farmer information. A rice field methane reduction support system that calculates a methane reduction amount reduced from a predetermined basic methane emission amount of the rice field based on the implementation status of the agricultural work included in the work information. . 21. The control unit of the rice field methane reduction support device transmits evaluation information indicating the methane reduction amount of the rice field to the farmer terminal device based on the farmer information using the communication unit. Rice field methane reduction support system. Includes a detection device that detects the water management status of rice fields,
The detection device detects the water management state of the paddy field based on the detection result of a water level sensor that detects the water level of the paddy field, or the observation result of the paddy field by a flying object or an observation device mounted on a flying object. transmitting the water management information including the water management state to at least one of the agricultural management device and the rice field methane reduction support device;
The control unit of the rice field methane reduction support device includes:
The communication unit acquires the farmer information and the paddy field information and work information of the rice field corresponding to the farmer information from at least one of the agricultural management device and the farmer terminal device;
The communication unit periodically or at a predetermined timing acquires the water management information during crop cultivation in the paddy field from at least one of the detection device, the agricultural management device, and the farmer terminal device; The rice field methane reduction support according to claim 20, wherein the partially dry state of the rice field is specified based on the plurality of acquired water management information, and the methane reduction amount of the rice field is calculated based on the partially dry state. system. The rice field methane reduction support system according to claim 20, wherein the farmer terminal device is configured to be able to input at least one of the farmer information, the work information, and rice field information regarding the rice field. The control unit of the rice field methane reduction support device includes:
transmitting report information including the methane reduction amount of the rice field and the farmer information corresponding to the rice field to a credit management device by the communication unit;
acquiring credit information indicating an electronic credit issued by the credit management device according to the methane reduction amount by the communication unit;
The rice field methane reduction support system according to any one of claims 20 to 23, wherein the credit information is transmitted to the farmer terminal device by the communication unit. an acquisition unit that acquires work information related to agricultural work for cultivating crops in a rice field and detected water management information indicating a water management state of the rice field detected by a detection device;
a control unit that determines whether a water management abnormality has occurred in the rice field based on a difference between target water management information indicating a water management state of the rice field identified from the work information and the detected water management information;
An information processing device comprising: an output unit that outputs water management abnormality information indicating that the water management abnormality has occurred. The detected water management information includes a detection result of a water level sensor that detects the water level of the rice field,
The control unit includes:
identifying the target water level of the rice field from the target water management information;
Identifying the actual water level of the rice field from the detection result of the water level sensor,
The information processing device according to claim 25, wherein it is determined that the water management abnormality has occurred when the actual water level is higher than the target water level by a predetermined value or more. The detected water management information includes observation results of an observation device that observes the area where the rice field is located,
The control unit includes:
identifying a target water management state of the rice field from the target water management information;
Identifying whether the surface of the rice field is a water surface from the observation results of the observation device,
If the target water management state is a falling water state in which the rice field is not filled with water, and the observation result of the observation device indicates that the surface of the rice field is a water surface, it is determined that the water management abnormality has occurred. The information processing apparatus according to claim 25, wherein the information processing apparatus makes a determination. The detected water management information includes observation results of an observation device that observes an area where at least one of the rice fields is located,
The control unit includes:
acquiring rice field information regarding the rice field by the acquisition unit, and identifying the position of the rice field from the rice field information;
Calculating a target water surface area of the rice field whose surface is a water surface from the target water management information,
From the observation results of the observation device, it is determined whether the surface of the paddy field and the land around the paddy field is a water surface, and the actual water surface area is determined by adding the area of the paddy field and the land whose surface is a water surface. Calculate,
The information processing device according to claim 25, wherein it is determined that the water management abnormality has occurred when the actual water surface area is larger than the target water surface area by a predetermined value or more. The control unit includes:
acquiring farmer information regarding a farmer corresponding to the rice field by the acquisition unit;
The information processing device according to any one of claims 25 to 28, wherein when determining that the water management abnormality has occurred, the output unit notifies the farmer of the water management abnormality information based on the farmer information. The control unit includes:
acquiring land management information including information indicating a manager of land surrounding the rice field by the acquisition unit;
The information processing device according to any one of claims 25 to 28, wherein when determining that the water management abnormality has occurred, the output unit notifies the manager of the water management abnormality information based on the land management information. A detection device that detects water management status of rice fields;
an information processing device;
The information processing device includes:
an acquisition unit that acquires work information related to agricultural work for cultivating crops in the rice field and detected water management information indicating a water management state of the rice field detected by the detection device;
a control unit that determines whether a water management abnormality has occurred in the rice field based on a difference between target water management information indicating a water management state of the rice field identified from the work information and the detected water management information;
An agricultural support system comprising: an output unit that outputs water management abnormality information indicating that the water management abnormality has occurred.

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