JP6692102B2 - Carbon dioxide application support device and carbon dioxide application support program - Google Patents

Description

The present invention relates to a carbon dioxide application support device and a carbon dioxide application support program.
The present application claims priority based on Japanese Patent Application No. 2016-148443 filed in Japan on July 28, 2016, the contents of which are incorporated herein by reference.

  BACKGROUND ART Conventionally, there is known a technique of applying carbon dioxide to a greenhouse for growing plants to promote the growth of plants (for example, Patent Document 1).

JP, 2014-128263, A

During the time period of light intensity when plants actively perform photosynthesis, the temperature in the greenhouse rises too much, so the windows of the greenhouse may be opened. When the window of the greenhouse is opened, even if carbon dioxide is applied to the greenhouse, most of the carbon dioxide applied to the greenhouse leaks out of the window through the window. The manager who manages the greenhouse should increase or decrease the flow rate of carbon dioxide applied to the greenhouse according to the change in the growth environment of plants, but there is a problem that there is no rational method for determining the flow rate.
An object of the present invention is to provide a carbon dioxide application support device and a carbon dioxide application support program capable of notifying a manager of the flow rate of carbon dioxide applied to a greenhouse.

  One aspect of the present invention, from a measurement unit that measures the environment inside and outside the greenhouse for growing plants, an environmental condition acquisition unit that acquires environmental conditions for growing plants, and the environmental conditions that the environmental condition acquisition unit acquires. Of the above, the carbon dioxide concentration in the greenhouse, the carbon dioxide concentration outside the greenhouse, the ventilation frequency of the greenhouse, and the light intensity in the greenhouse, based on the carbon dioxide exchange performed by the plants in the greenhouse. An environment for generating environmental data in which an exchange rate calculation unit for calculating a rate, the environmental condition acquired by the environmental condition acquisition unit, and the carbon dioxide exchange rate calculated by the exchange rate calculation unit are associated with each other. Environmental data similar to the environmental condition acquired by the environmental condition acquisition unit is acquired as similar environmental data from the data generation unit and the environmental data generated in the past by the environmental data generation unit. Boundary data acquisition unit, based on the similar environmental data acquired by the environmental data acquisition unit, and the exchange rate of the carbon dioxide calculated by the exchange rate calculation unit, the plants in the greenhouse are carbon dioxide in the greenhouse. Among the environmental conditions acquired by the consumption rate calculation unit that calculates the rate of consuming carbon, the volume inside the greenhouse, the consumption rate calculated by the absorption rate calculation unit, and the environmental condition acquisition unit, the greenhouse. It is a carbon dioxide application support device comprising: an application rate estimation unit that estimates the relationship between the application rate of carbon dioxide applied to the greenhouse and the consumption rate based on the ventilation frequency.

  Further, in another aspect of the present invention, the consumption rate calculation unit is a relative value of the exchange rate of the carbon dioxide calculated by the exchange rate calculation unit and the exchange rate of the carbon dioxide included in the similar environment data. A carbon dioxide application support device for calculating the consumption rate based on the above.

  Further, in another aspect of the present invention, the application rate estimation unit further calculates a value related to the state of the plant based on the consumption rate calculated by the consumption rate calculation unit, a carbon dioxide application assistance device. Is.

  Further, another aspect of the present invention, the value related to the state of the plant, the foliage growth rate showing the speed of elongation of the foliage including the growth point of the plant, the water evaporated from the plant. The carbon dioxide application support device includes at least one of the transpiration rates indicating the amount per unit time.

  Further, in another aspect of the present invention, the environmental conditions include a condition of a satiety in the greenhouse, a condition of an air temperature in the greenhouse, and a condition of a liquid supply rate to be supplied to the plant. The speed estimation unit is a carbon dioxide application support device that further estimates the relationship between at least one of the environmental conditions and the consumed speed.

  One aspect of the present invention, a computer, from a measurement unit that measures the environment inside and outside the greenhouse for growing plants, an environmental condition acquisition step of acquiring the environmental conditions under which the plants are grown, and acquired in the environmental condition acquisition step. Among the environmental conditions, the concentration of carbon dioxide in the greenhouse, the concentration of carbon dioxide outside the greenhouse, the number of ventilations of the greenhouse, and the light intensity in the greenhouse are performed by the plants in the greenhouse. The respiratory rate calculation step of calculating the exchange rate of carbon dioxide, the environmental condition acquired in the environmental condition acquisition step, and the exchange rate of carbon dioxide calculated in the respiratory rate calculation step are associated with each other. From the environmental data generating step of generating environmental data and the environmental data generated in the past in the environmental data generating step, The environmental data acquisition step of acquiring environmental data similar to the environmental conditions acquired in the environmental condition acquisition step as similar environmental data, the similar environmental data acquired in the environmental data acquisition step, and the respiration rate calculation step Based on the exchange rate of the carbon dioxide calculated in, the consumption rate calculating step of calculating the rate at which plants in the greenhouse consume carbon dioxide in the greenhouse, the volume in the greenhouse, the consumption rate Based on the consumption rate calculated in the calculation step and the ventilation frequency of the greenhouse out of the environmental conditions acquired in the environmental condition acquisition step, the application rate of carbon dioxide applied in the greenhouse and the Carbon dioxide for performing the application rate estimation step of estimating the relationship with the consumption rate Is a use support program.

  According to the present invention, it is possible to provide a carbon dioxide application support device and a carbon dioxide application support program capable of notifying a manager of the flow rate of carbon dioxide applied to a greenhouse.

It is a figure which shows an example of the external appearance structure of a greenhouse. It is a figure which shows an example of a structure of a carbon dioxide application assistance device. It is a flow chart which shows an example of operation of a carbon dioxide application support device. It is a flow chart which shows an example of operation of a carbon dioxide application support device. It is a figure which shows an example of the environmental data memorize | stored in a memory | storage part. It is a figure which shows an example of the relationship between the carbon dioxide concentration in a greenhouse, and a pure photosynthesis rate. It is a figure which shows an example of the case where it correct | amends to the pure photosynthesis speed of similar environment data, and a case where it does not perform. It is a figure which shows an example of the application rate of the carbon dioxide which the application rate estimation part estimated. It is a figure which shows an example of the application rate of the carbon dioxide which the application rate estimation part estimated. It is a figure which shows an example of the relationship of the amount of the environmental data memorize | stored in the memory | storage part, and the pure photosynthesis rate which a consumption rate calculation part calculates. It is a figure which shows an example of the relationship between the permissible range of the similar environmental data which an environmental data acquisition part acquires from a memory | storage part, and the pure photosynthesis rate which a consumption rate calculation part calculates.

[Embodiment]
[External structure of greenhouse 1]
Hereinafter, an embodiment of a carbon dioxide application support device according to the present invention will be described with reference to the drawings. The number of components and the like described in this embodiment are not intended to limit the scope of the present invention thereto unless specifically stated, but are merely illustrative examples.
FIG. 1 is a diagram showing an example of an external configuration of the greenhouse 1.

  A plant NP is vegetated in the greenhouse 1. The greenhouse 1 is a building in which plant NPs are grown. The greenhouse 1 may receive sunlight and grow an internal plant NP, or may grow an internal plant NP by artificial light. The plant NP grows according to the environmental conditions of the greenhouse 1. Specifically, the plant NP receives light in the greenhouse 1 to absorb carbon dioxide in the greenhouse 1 to perform photosynthesis. In this example, the plant NP is vegetated in the greenhouse 1 in the seedling state. The plant NP may be vegetated in the greenhouse 1 when it is in a state other than seedlings.

  The greenhouse 1 includes a measurement unit 10, a window 20, a satiation calculation device 15, a ventilation frequency calculation unit 16, a carbon dioxide application control device 17, a greenhouse information device 18, and a carbon dioxide application support device 100. ..

The measuring unit 10 measures the environmental conditions of the greenhouse 1. The environmental conditions of the greenhouse 1 include the temperature in the greenhouse 1, the light intensity indicating the light intensity in the greenhouse 1, the satiety in the greenhouse 1, the carbon dioxide concentration inside and outside the greenhouse 1, and the ventilation frequency of the greenhouse 1. .. Here, the satiation is the difference between the total amount of water vapor in the air at a certain temperature and the amount of water vapor already contained in the air. The ventilation frequency is the amount of air flowing into the structure per hour divided by the volume of air in the structure. In this example, the ventilation frequency is the amount of air flowing into the greenhouse 1 per hour divided by the volume of air in the greenhouse 1. Specifically, the ventilation rate, within the greenhouse 1 of the air volume of ^{"500" (m 3),} "500" when the air ^{(m 3)} flows in per hour, ventilation rate is " 1 ″ (h ⁻¹ ).

The measurement unit 10 includes a temperature sensor 11, a light intensity sensor 12, an indoor carbon dioxide concentration measurement sensor 13, an outdoor carbon dioxide concentration measurement sensor 14, a satiety calculation device 15, and a ventilation frequency calculation unit 16.
The temperature sensor 11 measures the temperature inside the greenhouse 1. The temperature sensor 11 outputs the measured temperature in the greenhouse 1 to the carbon dioxide application support device 100. Specifically, the temperature sensor 11 measures the temperature inside the greenhouse 1.
The light intensity sensor 12 measures the intensity of light inside the greenhouse 1. The light intensity sensor 12 outputs the measured light intensity in the greenhouse 1 to the carbon dioxide application support device 100. In this example, the light intensity sensor 12 measures the amount of solar radiation in the greenhouse 1. In the case of a greenhouse that grows plants by artificial light, the light intensity sensor 12 may measure the intensity of artificial light.

The indoor carbon dioxide concentration measuring sensor 13 measures the carbon dioxide concentration in the greenhouse 1. The indoor carbon dioxide concentration measurement sensor 13 outputs the measured carbon dioxide concentration in the greenhouse 1 to the carbon dioxide application support device 100.
The outdoor carbon dioxide concentration measuring sensor 14 measures the carbon dioxide concentration outside the greenhouse 1. The outdoor carbon dioxide concentration measurement sensor 14 outputs the measured carbon dioxide concentration outside the greenhouse 1 to the carbon dioxide application support device 100.

  The satiation calculation device 15 calculates the satiation in the greenhouse 1. The satiation calculation device 15 calculates the satiation based on the temperature inside the greenhouse 1 and the relative humidity inside the greenhouse 1. The satiation calculation device 15 outputs the calculated satiation to the carbon dioxide application support device 100.

  The ventilation frequency calculation unit 16 calculates the ventilation frequency of the greenhouse 1. The ventilation frequency measuring unit 16 calculates the ventilation frequency based on the water balance method or the like. Here, the water balance method is a method of calculating the number of ventilations of the greenhouse 1 based on the moisture supplied to the greenhouse 1 and the moisture discharged from the greenhouse 1. The ventilation frequency calculation unit 16 outputs the measured ventilation frequency to the carbon dioxide application support device 100. The greenhouse 1 may have its ventilation frequency controlled by a fan (not shown) or the like. In this example, a case where the ventilation frequency is 1 will be described.

The window 20 opens and closes. When the window 20 opens and closes, the environmental conditions inside the greenhouse 1 change.
Specifically, when the window 20 is opened, the degree of replacement of the air in the greenhouse 1 increases. When the window 20 is opened, if the temperature inside the greenhouse 1 is higher than the temperature outside the greenhouse 1, the temperature inside the greenhouse 1 drops. When the window 20 is closed, the air in the greenhouse 1 is hardly replaced. When the window 20 is closed, the temperature in the greenhouse 1 will generally rise if the greenhouse 1 is in sunlight.

The carbon dioxide application control device 17 controls the application rate of carbon dioxide supplied to the greenhouse 1 based on the application rate of carbon dioxide calculated by the carbon dioxide application support device 100. In other words, the carbon dioxide application control device 17 controls the amount of carbon dioxide supplied into the greenhouse 1 based on the carbon dioxide application rate calculated by the carbon dioxide application support device 100.
The carbon dioxide application control device 17 outputs the carbon dioxide application rate CS indicating the application rate of carbon dioxide supplied by the carbon dioxide application control device 17 into the greenhouse 1 to the environment data generation unit 109.

  The greenhouse information device 18 is a device in which information related to the greenhouse 1 is stored. In this example, the greenhouse information device 18 stores information on the air volume in the greenhouse 1. The air volume in the greenhouse 1 is the volume of air in the greenhouse 1. The information on the air volume in the greenhouse 1 stored in the greenhouse information device 18 may be treated as a substantially fixed value for each greenhouse 1. The information on the air volume in the greenhouse 1 may be stored anywhere.

The carbon dioxide application support device 100 acquires environmental conditions inside and outside the greenhouse 1 that change depending on the season, weather, time, and the like. The carbon dioxide application support device 100 estimates a carbon dioxide application rate suitable for the plant NP in the greenhouse 1 based on the acquired environmental conditions. In this example, the carbon dioxide application rate estimated by the carbon dioxide application support device 100 is the carbon dioxide application rate applied to the plant NP in the greenhouse 1 and the plant NP in the greenhouse 1 according to the environmental conditions inside and outside the greenhouse 1. 2 is a curve showing the relationship with the pure photosynthetic rate of. In the following description, a curve showing the relationship between the carbon dioxide application rate applied to the plant NP in the greenhouse 1 and the net photosynthetic rate of the plant NP in the greenhouse 1 according to the environmental conditions inside and outside the greenhouse 1 is simply referred to as a CP curve. It may be described.
Details of the carbon dioxide application support device 100 will be described later.

Next, with reference to FIG. 2, a functional configuration of the carbon dioxide application support device 100 will be described.
FIG. 2 is a diagram showing an example of the configuration of the carbon dioxide application support device 100.
The carbon dioxide application support device 100 includes an environmental condition acquisition unit 101, an exchange speed calculation unit 108, an environmental data generation unit 109, a storage unit 110, an environmental data acquisition unit 111, a consumption speed calculation unit 112, and an applied speed. The estimation unit 113 and the display unit 114 are provided.

The environmental condition acquisition unit 101 acquires from the measurement unit 10 the environmental condition under which the plant NP is grown. When the plant NP is planted in the greenhouse 1, the environmental condition acquisition unit 101 opens the time interval and acquires the environmental condition from the measurement unit 10.
Specifically, the environmental condition acquisition unit 101 includes a temperature acquisition unit 102, a light intensity acquisition unit 103, a satiety acquisition unit 104, an indoor carbon dioxide concentration acquisition unit 105, and an outdoor carbon dioxide concentration acquisition unit 106. A ventilation frequency acquisition unit 107 is included.

  The temperature acquisition unit 102 acquires the temperature TV in the greenhouse 1 from the temperature sensor 11. The temperature acquisition unit 102 outputs the acquired temperature TV in the greenhouse 1 to the exchange rate calculation unit 108 and the environment data generation unit 109.

  The light intensity acquisition unit 103 acquires the light intensity LS in the greenhouse 1 from the light intensity sensor 12. The light intensity acquisition unit 103 outputs the acquired light intensity LS in the greenhouse 1 to the exchange rate calculation unit 108 and the environment data generation unit 109.

  The saturation difference acquisition unit 104 acquires the saturation difference HD in the greenhouse 1 from the saturation calculation device 15. The satiety difference acquiring unit 104 outputs the acquired satiety difference HD in the greenhouse 1 to the environment data generating unit 109.

  The indoor carbon dioxide concentration acquisition unit 105 acquires the carbon dioxide concentration ICD in the greenhouse 1 from the indoor carbon dioxide concentration measurement sensor 13. The indoor carbon dioxide concentration acquisition unit 105 outputs the acquired carbon dioxide concentration ICD in the greenhouse 1 to the exchange rate calculation unit 108 and the environmental data generation unit 109.

  The outdoor carbon dioxide concentration acquisition unit 106 acquires the carbon dioxide concentration OCD outside the greenhouse 1 from the outdoor carbon dioxide concentration measurement sensor 14. The outdoor carbon dioxide concentration acquisition unit 106 outputs the acquired carbon dioxide concentration OCD outside the greenhouse 1 to the exchange rate calculation unit 108 and the environmental data generation unit 109.

  The ventilation frequency acquisition unit 107 acquires the ventilation frequency VC from the ventilation frequency calculation unit 16. The ventilation frequency acquisition unit 107 outputs the acquired ventilation frequency VC to the exchange rate calculation unit 108, the environment data generation unit 109, and the application speed estimation unit 113.

  The exchange rate calculation unit 108 calculates the carbon dioxide exchange rate PS of the plant NP in the greenhouse 1. The exchange rate PS of carbon dioxide is the rate of carbon dioxide that is consumed or released by the plant NP in the greenhouse 1. Specifically, the exchange speed calculation unit 108 acquires the light intensity LS in the greenhouse 1 from the light intensity acquisition unit 103. The exchange rate calculation unit 108 acquires the carbon dioxide concentration ICD in the greenhouse 1 from the indoor carbon dioxide concentration acquisition unit 105. The exchange rate calculation unit 108 acquires the carbon dioxide concentration OCD outside the greenhouse 1 from the outdoor carbon dioxide concentration acquisition unit 106. The exchange rate calculation unit 108 acquires the ventilation frequency VC from the ventilation frequency acquisition unit 107. The exchange rate calculation unit 108 acquires the air volume AC from the greenhouse information device 18.

  Of the environmental conditions acquired by the environmental condition acquisition unit 101, the exchange rate calculation unit 108 includes the carbon dioxide concentration ICD in the greenhouse 1, the carbon dioxide concentration OCD outside the greenhouse 1, the ventilation frequency VC of the greenhouse 1, and the greenhouse 1 Based on the internal light intensity LS, the carbon dioxide exchange rate PS performed by the plant NP in the greenhouse 1 is calculated. Specifically, the exchange rate calculation unit 108 calculates the carbon dioxide exchange rate PS using the steady-state equation derived from the Seidel equation shown in equation (1).

Here, M in the formula (1) is a carbon dioxide exchange rate PS of the plant NP in the greenhouse 1. N in the equation (1) is the ventilation frequency VC. V in the equation (1) is the air volume AC in the greenhouse 1. ΔC in the equation (1) is the difference between the carbon dioxide concentration ICD in the greenhouse 1 and the carbon dioxide concentration OCD outside the greenhouse 1.
When the light intensity LS in the greenhouse 1 does not indicate the light intensity suitable for the photosynthesis of the plant NP (for example, at night), the exchange rate PS of carbon dioxide calculated by the exchange rate calculation unit 108 indicates that of the plant NP. Indicates the dark respiration rate. Here, dark respiration is respiration in which the plant NP emits carbon dioxide.
The exchange rate PS of carbon dioxide calculated by the exchange rate calculation unit 108 means that when the light intensity LS in the greenhouse 1 indicates the intensity of light suitable for photosynthesis of the plant NP (for example, in the daytime), It is a pure photosynthetic rate. The pure photosynthetic rate is the rate of carbon dioxide absorbed by the plant NP in the greenhouse 1 according to the carbon dioxide concentration ICD in the greenhouse 1. In the following description, the pure photosynthesis rate may be described as the consumption rate UD.
That is, when the light intensity indicated by the light intensity LS in the greenhouse 1 has not reached the intensity at which the plant NP can perform photosynthesis, the exchange rate calculation unit 108 calculates the carbon dioxide exchange rate PS as the dark respiration rate. To do. When the light intensity indicated by the light intensity LS in the greenhouse 1 reaches the intensity at which the plant NP can perform photosynthesis, the exchange rate calculation unit 108 calculates the carbon dioxide exchange rate PS as the pure photosynthetic rate. ..

  The carbon dioxide exchange rate PS calculated by the exchange rate calculation unit 108 may be distinguished between the dark respiration rate and the pure photosynthetic rate based on the time information. Specifically, the exchange rate PS of carbon dioxide calculated by the exchange rate calculation unit 108 may be the time during which the sun is appearing as the pure photosynthetic rate. Further, the exchange rate PS of carbon dioxide calculated by the exchange rate calculation unit 108 may be the time during which the sun is setting as the dark respiration rate.

  The environmental data generation unit 109 generates environmental data ED in which the environmental conditions acquired by the environmental condition acquisition unit 101 and the carbon dioxide exchange rate PS calculated by the exchange rate calculation unit 108 are associated with each other. Specifically, the environment data generation unit 109 acquires the temperature TV in the greenhouse 1 from the temperature acquisition unit 102. The environment data generation unit 109 acquires the light intensity LS in the greenhouse 1 from the light intensity acquisition unit 103. The environmental data generation unit 109 acquires the satiety HD in the greenhouse 1 from the satiety acquisition unit 104. The environmental data generation unit 109 acquires the carbon dioxide concentration ICD in the greenhouse 1 from the indoor carbon dioxide concentration acquisition unit 105. The environmental data generation unit 109 acquires the carbon dioxide concentration OCD outside the greenhouse 1 from the outdoor carbon dioxide concentration acquisition unit 106. The environment data generation unit 109 acquires the ventilation frequency VC from the ventilation frequency acquisition unit 107. The environmental data generation unit 109 acquires the carbon dioxide application rate CS from the carbon dioxide application controller 17.

The environmental data generation unit 109 includes a temperature TV in the greenhouse 1, a light intensity LS in the greenhouse 1, a saturation difference HD in the greenhouse 1, a carbon dioxide concentration ICD in the greenhouse 1, and a carbon dioxide concentration outside the greenhouse 1. The OCD, the ventilation frequency VC, the carbon dioxide application rate CS, the date and time when the environmental condition is acquired, and the carbon dioxide exchange rate PS are associated with each other to generate the environmental data ED.
The environment data generation unit 109 causes the storage unit 110 to store the generated environment data ED. The environment data generation unit 109 outputs the generated environment data ED to the environment data acquisition unit 111.
The storage unit 110 stores the environment data ED generated by the environment data generation unit 109.

  The environmental data acquisition unit 111 acquires environmental data similar to the environmental condition ED acquired by the environmental condition acquisition unit 101 from the environmental data ED generated in the past by the environmental data generation unit 109 as similar environmental data SED. The similar environment data SED is the environment data ED having a value close to the environment data ED used by the application rate estimation unit 113 to estimate the application rate AS of carbon dioxide among the environment data generated in the past. Specifically, the environmental data ED used by the environmental data acquisition unit 111 to select the similar environmental data SED indicates that the present environmental conditions in the greenhouse 1 are those in the greenhouse 1 due to sunset, large temperature change, cloudy weather, and rainfall. It may be environmental data ED before environmental conditions such as changes in light intensity LS have changed significantly. More specifically, for example, the environment data acquisition unit 111 may acquire, as the similar environment data SED, environment data similar to the environment data ED generated earlier than the most recently generated environment data ED. .. The environment data acquisition unit 111 acquires the environment acquired from the environment data generation unit 109 when acquiring the data similar to the environment data ED generated before the latest generated environment data ED as the similar environment data SED. The data ED may be accumulated, and the similar environment data SED may be acquired from the storage unit 110 based on the accumulated environment data ED.

The environmental data acquisition unit 111 acquires the environmental data ED from the environmental data generation unit 109.
Of the environmental data ED acquired from the environmental data generation unit 109, the environmental data acquisition unit 111 is similar to the light intensity LS in the greenhouse 1, the temperature TV in the greenhouse 1, and the satiety difference HD in the greenhouse 1. The environment data to be processed is acquired from the storage unit 110 as the similar environment data SED.
Specifically, the environmental data acquisition unit 111, among the environmental data ED acquired from the environmental data generation unit 109, the light intensity LS in the greenhouse 1, the temperature TV in the greenhouse 1, and the saturation difference HD in the greenhouse 1. The respective values of and are within the range of about ± 25% are acquired as the similar environment data SED. As an example, in the environmental data ED, the environmental data acquisition unit 111 determines that the light intensity LS in the greenhouse 1 is “100”, the temperature TV in the greenhouse 1 is “20”, and the saturation difference HD in the greenhouse 1 is “30”. In the case of, the light intensity LS in the greenhouse 1 is “75” to “125” and the temperature TV in the greenhouse 1 is “15” from the environmental data ED generated in the past stored in the storage unit 110. To “25” and the satiety difference HD in the greenhouse 1 from “22.5” to “37.5” is acquired as the similar environment data SED.

  The environment data acquisition unit 111 outputs the environment data ED acquired from the environment data generation unit 109 and the similar environment data SED acquired from the storage unit 110 to the consumption speed calculation unit 112.

Based on the similar environmental data SED acquired by the environmental data acquisition unit 111 and the carbon dioxide exchange rate PS calculated by the exchange rate calculation section 108, the consumption rate calculation section 112 determines that the plant NP in the greenhouse 1 is in the greenhouse 1. Calculate the speed UD of consuming the carbon dioxide of. The consumption rate calculation unit 112 consumes the carbon dioxide most recent to the date of the environmental data ED based on the most recent dark breathing rate of the environment data ED and the most recent dark breathing rate of the similar environment data SED. Correct the speed UD. Specifically, the consumption rate calculation unit 112 determines that the latest dark breathing rate of the environment data ED is “1” and the latest dark breathing rate of the similar environment data SED is “0.5”. , Doubles the speed UD of consuming carbon dioxide contained in the similar environment data SED. That is, the consumption rate calculation unit 112 corrects the rate UD of consuming carbon dioxide increased according to the growth of the plant NP in the greenhouse 1 based on the relative value of the dark respiration rate.
The consumption rate calculation unit 112 performs the above-described correction for each carbon dioxide concentration ICD in the greenhouse 1 included in the similar environment data SED. The consumption rate calculation unit 112 calculates the relationship between the carbon dioxide concentration ICD in the greenhouse 1 and the rate UD at which the corrected plant NP in the greenhouse 1 consumes carbon dioxide.
The consumption rate calculation unit 112 outputs the relationship between the calculated carbon dioxide concentration ICD in the greenhouse 1 and the carbon dioxide consumption rate UD to the application rate estimation unit 113.

The application rate estimation unit 113 determines the application rate of carbon dioxide applied in the greenhouse 1 based on the air volume AC in the greenhouse 1, the consumption rate UD, and the ventilation frequency VC of the greenhouse 1 among the environmental conditions. The relationship with the speed UD consumed by the plant NP in the greenhouse 1 is estimated.
The application speed estimation unit 113 acquires the speed UD at which carbon dioxide is consumed from the consumption speed calculation unit 112. The application speed estimation unit 113 acquires the air volume AC from the greenhouse information device 18. The application speed estimation unit 113 acquires the ventilation frequency VC from the ventilation frequency acquisition unit 107. The application speed estimation unit 113 is based on the speed UD of consuming carbon dioxide acquired from the consumption speed calculation unit 112, the air volume AC acquired from the greenhouse information device 18, and the ventilation frequency VC acquired by the ventilation frequency acquisition unit 107. Then, the CP curve is estimated. Specifically, the application speed estimation unit 113 estimates the CP curve from the above equation (1).
It should be noted that the application rate estimation unit 113 uses the equation in the steady state derived from the Seidel equation shown in Equation (2) for the similar environment data SED when carbon dioxide is applied in the greenhouse 1 to obtain CP. Estimate the curve.

Here, M in the formula (2) is a carbon dioxide exchange rate PS of the plant NP in the greenhouse 1. N in the equation (2) is the ventilation frequency VC. V in the equation (2) is the air volume AC in the greenhouse 1. ΔC in the equation (2) is the difference between the carbon dioxide concentration ICD in the greenhouse 1 and the carbon dioxide concentration OCD outside the greenhouse 1. S in the equation (2) is an application rate of carbon dioxide applied by the carbon dioxide application control device 17.
The application speed estimation unit 113 causes the display unit 114 to display the estimated CP curve.

The display unit 114 displays the CP curve.
The manager of the greenhouse 1 checks the CP curve displayed on the display unit 114. The administrator operates the operation unit (not shown) included in the carbon dioxide application support device 100 to previously input a condition for determining that the effect of applying carbon dioxide can be expected, whereby the carbon dioxide application control device 17 In addition, it is possible to control the application rate of the amount of carbon dioxide calculated by the carbon dioxide application support device 100. It should be noted that the carbon dioxide application support device 100 may have a threshold value of the rate at which carbon dioxide is applied to the greenhouse 1 set in advance. When the threshold value is set in advance, the carbon dioxide application support device 100 outputs the calculated carbon dioxide application rate to the carbon dioxide application control device 17 according to the threshold value.

[Outline of Environmental Condition Acquisition Operation of Carbon Dioxide Application Support Device 100]
Next, with reference to FIG. 3, an outline of the environmental condition acquisition operation of the carbon dioxide application support device 100 will be described.
FIG. 3 is a flowchart S1 showing an example of the operation of the carbon dioxide application support device 100.

  The environmental condition acquisition unit 101 included in the carbon dioxide application support device 100 starts to acquire the environmental conditions in the greenhouse 1 after the plant NP is planted in the greenhouse 1. The light intensity acquisition unit 103 acquires the light intensity LS in the greenhouse 1 from the light intensity sensor 12. The light intensity acquisition unit 103 outputs the light intensity LS in the greenhouse 1 acquired from the light intensity sensor 12 to the environment data generation unit 109 and the exchange speed calculation unit 108 (step S110).

  The temperature acquisition unit 102 acquires the temperature TV in the greenhouse 1 from the temperature sensor 11. The temperature acquisition unit 102 outputs the temperature TV in the greenhouse 1 acquired from the temperature sensor 11 to the environment data generation unit 109 (step S120).

  The saturation difference acquisition unit 104 acquires the saturation difference HD in the greenhouse 1 from the saturation calculation device 15. The saturation difference acquisition unit 104 outputs the saturation difference HD in the greenhouse 1 acquired from the saturation calculation device 15 to the environment data generation unit 109 (step S130).

  The outdoor carbon dioxide concentration acquisition unit 106 acquires the carbon dioxide concentration OCD outside the greenhouse 1 from the outdoor carbon dioxide concentration measurement sensor 14. The outdoor carbon dioxide concentration acquisition unit 106 outputs the carbon dioxide concentration OCD outside the greenhouse 1 acquired from the outdoor carbon dioxide concentration measurement sensor 14 to the environmental data generation unit 109 and the exchange speed calculation unit 108 (step S140). ).

  The indoor carbon dioxide concentration acquisition unit 105 acquires the carbon dioxide concentration ICD in the greenhouse 1 from the indoor carbon dioxide concentration measurement sensor 13. The indoor carbon dioxide concentration acquisition unit 105 outputs the carbon dioxide concentration ICD in the greenhouse 1 acquired from the indoor carbon dioxide concentration measurement sensor 13 to the environmental data generation unit 109 and the exchange rate calculation unit 108 (step S150). ).

  The ventilation frequency acquisition unit 107 acquires the ventilation frequency VC from the ventilation frequency calculation unit 16. The ventilation frequency acquisition unit 107 outputs the ventilation frequency VC acquired from the ventilation frequency calculation unit 16 to the environment data generation unit 109, the replacement speed calculation unit 108, and the application speed estimation unit 113 (step S160).

  The environment data generation unit 109 acquires the carbon dioxide application rate CS from the carbon dioxide application controller 17 (step S170).

  The exchange speed calculation unit 108 acquires the light intensity LS in the greenhouse 1 from the light intensity acquisition unit 103. The exchange rate calculation unit 108 acquires the carbon dioxide concentration ICD in the greenhouse 1 from the indoor carbon dioxide concentration acquisition unit 105. The exchange rate calculation unit 108 acquires the carbon dioxide concentration OCD outside the greenhouse 1 from the outdoor carbon dioxide concentration acquisition unit 106. The exchange rate calculation unit 108 acquires the ventilation frequency VC from the ventilation frequency acquisition unit 107. The exchange rate calculation unit 108 calculates the carbon dioxide exchange rate PS of the plant NP in the greenhouse 1 based on the above-described formula (1). The exchange rate calculation unit 108 outputs the calculated exchange rate PS of carbon dioxide to the environment data generation unit 109 (step S180).

  The environmental data generation unit 109 acquires the temperature TV in the greenhouse 1 from the temperature acquisition unit 102. The environment data generation unit 109 acquires the light intensity LS in the greenhouse 1 from the light intensity acquisition unit 103. The environmental data generation unit 109 acquires the satiety HD in the greenhouse 1 from the satiety acquisition unit 104. The environmental data generation unit 109 acquires the carbon dioxide concentration ICD in the greenhouse 1 from the indoor carbon dioxide concentration acquisition unit 105. The environmental data generation unit 109 acquires the carbon dioxide concentration OCD outside the greenhouse 1 from the outdoor carbon dioxide concentration acquisition unit 106. The environment data generation unit 109 acquires the ventilation frequency VC from the ventilation frequency acquisition unit 107. The environmental data generation unit 109 acquires the exchange rate PS of carbon dioxide from the exchange rate calculation unit 108. The environmental data generation unit 109 includes the temperature TV in the greenhouse 1 acquired from the temperature acquisition unit 102, the light intensity LS in the greenhouse 1 acquired from the light intensity acquisition unit 103, and the greenhouse 1 acquired from the satiety acquisition unit 104. Difference HD, the carbon dioxide concentration ICD in the greenhouse 1 acquired from the indoor carbon dioxide concentration acquisition unit 105, the carbon dioxide concentration OCD outside the greenhouse 1 acquired from the outdoor carbon dioxide concentration acquisition unit 106, and the ventilation frequency acquisition unit The ventilation data VC acquired from 107 and the carbon dioxide exchange rate PS acquired from the exchange rate calculation unit 108 are associated with each other to generate environment data ED. The environment data generation unit 109 stores the generated environment data ED in the storage unit 110 (step S190).

The carbon dioxide application support device 100 repeatedly executes the process of the flowchart S1. The carbon dioxide application support device 100 repeatedly executes the process of the flowchart S1 at time intervals. Here, the time interval for executing the process of the flowchart S1 is from several tens of seconds to several tens of minutes. More specifically, the carbon dioxide application supporting apparatus 100 accumulates a large amount of environmental data ED used for estimating the CP curve when the processing of the flowchart S1 is repeatedly executed at time intervals of 10 minutes or less. be able to. In this case, the carbon dioxide application support device 100 can estimate a more accurate CP curve based on many environmental data ED.
The carbon dioxide application support device 100 continuously performs the process of the flowchart S1 for several days or more, and stores the environmental data ED in the storage unit 110.
The order of the processes from step S110 to step S170 may be changed.

[Outline of Carbon Dioxide Application Rate Estimation Operation of Carbon Dioxide Application Support Device 100]
Next, with reference to FIG. 4, an outline of the carbon dioxide application rate estimation operation of the carbon dioxide application support device 100 will be described.
FIG. 4 is a flowchart S2 showing an example of the operation of the carbon dioxide application supporting apparatus 100.

  The environment data generation unit 109 outputs the environment data ED to the environment data acquisition unit 111. The environment data acquisition unit 111 acquires environment data ED acquired from the environment data generation unit 109 and similar environment data as similar environment data SED from the storage unit 110 (step S210). The environment data acquisition unit 111 stores the environment data ED acquired from the environment data acquisition unit 111, the similar environment data SED acquired from the storage unit 110, the dark respiration rate immediately before the date of the environment data ED, and the similar environment data SED. The dark breathing rate most recent to the date is output to the consumption rate calculating unit 112.

The consumption rate calculation unit 112 receives, from the environment data acquisition unit 111, the environment data ED, the similar environment data SED, the latest dark respiration rate of the environment data ED, and the latest dark respiration rate of the similar environment data SED. And get. The consumption rate calculation unit 112 corrects the pure photosynthetic rate of the similar environment data SED based on the latest dark respiratory rate of the environment data ED and the latest dark respiratory rate of the similar environment data SED. The consumption rate calculation unit 112 calculates the rate UD of consuming carbon dioxide indicating the relationship between the corrected pure photosynthetic rate and the carbon dioxide concentration ICD in the greenhouse 1 included in the similar environment data SED (step S220).
The consumption speed calculation unit 112 outputs the calculated carbon dioxide consumption speed UD to the application speed estimation unit 113.

  The application speed estimation unit 113 acquires the speed UD at which carbon dioxide is consumed from the consumption speed calculation unit 112. The application speed estimation unit 113 acquires the ventilation frequency VC from the ventilation frequency calculation unit 16. The application speed estimation unit 113 acquires the air volume AC from the greenhouse information device 18. The application rate estimation unit 113 estimates the CP curve for the current plant NP in the greenhouse 1 from the equation (1) described above (step S230). The application speed estimation unit 113 outputs the CP curve to the display unit 114.

  The display unit 114 acquires the CP curve from the application speed estimation unit 113. The display unit 114 displays the CP curve acquired from the application speed estimation unit 113 (step S240).

In addition, when the manager of the greenhouse 1 sets a condition that the effect of applying carbon dioxide can be expected in advance, the application rate estimation unit 113, based on the condition and the calculated CP curve, The application rate of carbon dioxide applied within 1 is calculated. The application rate estimation unit 113 outputs the calculated application rate of carbon dioxide applied to the greenhouse 1 to the carbon dioxide application control device 17. The carbon dioxide application control device 17 acquires the application rate of carbon dioxide applied to the greenhouse 1 from the application rate estimation unit 113. The carbon dioxide application control device 17 controls the application rate of the amount of carbon dioxide acquired from the application rate estimation unit 113.
The carbon dioxide application support device 100 repeatedly performs the process of the flowchart S2 described above.

[Specific Example of Operation of Carbon Dioxide Application Support Device 100]
Next, with reference to FIGS. 5 to 8, an example of a specific example of the operation of the carbon dioxide application support device 100 will be described.
FIG. 5 is a diagram showing an example of the environment data ED stored in the storage unit 110.

[Example of environmental data ED]
In the storage unit 110, the date when the environmental data ED is generated, the time when the environmental data ED is generated, the light intensity LS in the greenhouse 1, the temperature TV in the greenhouse 1, and the saturation difference HD in the greenhouse 1. , The carbon dioxide concentration ICD in the greenhouse 1, the carbon dioxide concentration OCD outside the greenhouse 1, information on the application rate of carbon dioxide applied by the carbon dioxide application controller 17, and pure photosynthesis corresponding to the application rate of carbon dioxide. The velocity UD for consuming carbon dioxide indicating the velocity and the ventilation frequency VC are stored in association with each other. In this example, the storage unit 110 stores environment data ED measured every 5 minutes for the past month.

Specifically, the storage unit 110 stores environmental data ED indicating the dark respiration rate on April 1 and environmental data ED indicating the pure photosynthetic rate on April 1. In the storage unit 110, environmental data ED indicating the dark respiration rate on April 20 and April 30, and environmental data ED indicating the pure photosynthetic rate on April 1, as in April 1. Is remembered. Here, the environmental data ED on April 20 is the environmental data ED during the growth of the plant NP. The environmental data ED on April 30 is the latest environmental data ED.
More specifically, in the storage unit 110, the date is “4/1”, the time is “0:00”, and the light intensity LS in the greenhouse 1 is “0” (μmol m ⁻² s ⁻¹ ). The temperature TV in the greenhouse 1 is "15" (° C), the satiety difference HD in the greenhouse 1 is "2.08" (kPa), and the carbon dioxide concentration ICD in the greenhouse 1 is "450" (mol mol ⁻¹ ), the carbon dioxide concentration OCD outside the greenhouse 1 is “440” (mol mol ⁻¹ ), the carbon dioxide application rate is “0” (L min ⁻¹ ), and the pure photosynthetic rate is “−0.4. “(Mol s ⁻¹ )” and the ventilation frequency “1” (h ⁻¹ ) are stored in association with each other.
In the storage unit 110, the date is “4/1”, the time is “10:00”, the light intensity LS inside the greenhouse 1 is “930” (μmol m ⁻² s ⁻¹ ), and the inside of the greenhouse 1 is The temperature TV is “29.0” (° C.), the saturation difference HD in the greenhouse 1 is “2.58” (kPa), and the carbon dioxide concentration ICD in the greenhouse 1 is “650” (mol mol ⁻¹ ). , The carbon dioxide concentration OCD outside the greenhouse 1 is “444” (mol mol ⁻¹ ), the carbon dioxide application rate is “30.1” (L min ⁻¹ ), and the pure photosynthetic rate is “1.2” (mol s ⁻¹ ) and ventilation frequency “1” (h ⁻¹ ) are stored in association with each other.
Similarly, the storage unit 110 stores data after 5 minutes and after 10 minutes.

In the storage unit 110, the date is “4/20”, the time is “0:00”, the light intensity LS in the greenhouse 1 is “0” (μmol m ⁻² s ⁻¹ ) Temperature TV is "17" (° C), satiety difference HD in greenhouse 1 is "1.88" (kPa), carbon dioxide concentration ICD in greenhouse 1 is "470" (mol mol ^-1 ), greenhouse The carbon dioxide concentration OCD outside 1 is “440” (mol mol ⁻¹ ), the carbon dioxide application rate is “0” (L min ⁻¹ ), and the pure photosynthetic rate is “−0.75” (mol s ^−1). ) And the ventilation frequency are “1” (h ⁻¹ ) are stored in association with each other.
In the storage unit 110, the date is “4/20”, the time is “13:00”, the light intensity LS in the greenhouse 1 is “924” (μmol m ⁻² s ⁻¹ ) The temperature TV is “32.1” (° C.), the saturation difference HD in the greenhouse 1 is “2.02” (kPa), and the carbon dioxide concentration ICD in the greenhouse 1 is “639” (mol mol ⁻¹ ). , The carbon dioxide concentration OCD outside the greenhouse 1 is “440” (mol mol ⁻¹ ), the carbon dioxide application rate is “0” (L min ⁻¹ ), and the pure photosynthetic rate is “2.1” (mol s ^{−). 1} ) and the ventilation frequency of “1” (h ⁻¹ ) are stored in association with each other.
Similarly, the storage unit 110 stores data after 5 minutes and after 10 minutes.

In the storage unit 110, the date is “4/30”, the time is “0:00”, the light intensity LS inside the greenhouse 1 is “0” (μmol m ⁻² s ⁻¹ ), and the inside of the greenhouse 1 is The temperature TV is "19" (° C), the saturation difference HD in the greenhouse 1 is "2.30" (kPa), and the carbon dioxide concentration ICD in the greenhouse 1 is "432" (mol mol ^-1 ). The carbon dioxide concentration OCD outside 1 is “444” (mol mol ⁻¹ ), the carbon dioxide application rate is “0” (L min ⁻¹ ), and the pure photosynthetic rate is “−1.0” (mol s ^−1). ) And the ventilation frequency are “1” (h ⁻¹ ) are stored in association with each other.
In the storage unit 110, the date is “4/30”, the time is “10:00”, the light intensity LS inside the greenhouse 1 is “920” (μmol m ⁻² s ⁻¹ ), and the inside of the greenhouse 1 is The temperature TV is “32.1” (° C.), the saturation difference HD in the greenhouse 1 is “2.00” (kPa), and the carbon dioxide concentration ICD in the greenhouse 1 is “441” (mol mol ⁻¹ ). , The carbon dioxide concentration OCD outside the greenhouse 1 is “445” (mol mol ⁻¹ ), the carbon dioxide application rate is “0” (L min ⁻¹ ), and the pure photosynthetic rate is “3.0” (mol s ^{−). 1} ) and the ventilation frequency of “1” (h ⁻¹ ) are stored in association with each other.

The environment data acquisition unit 111 indicates that the date is “4/30”, the time is “0:00”, the light intensity LS in the greenhouse 1 is “920” (μmol m ⁻² s ⁻¹ ), and the greenhouse 1 is in the greenhouse 1. Temperature TV is “32.1” (° C.), saturation difference HD in greenhouse 1 is “2.00” (kPa), and carbon dioxide concentration ICD in greenhouse 1 is “441” (mol mol ⁻¹ ). , The carbon dioxide concentration OCD outside the greenhouse 1 is "445" (mol mol ^-1 ), the carbon dioxide application rate is "0" (L min ^-1 ), and the pure photosynthetic rate is "3.0" (mol s). ⁻¹ ) and the ventilation frequency “1” (h ⁻¹ ) are associated with each other, and the allowable range for acquiring the similar environment data SED from the storage unit 110 is “± 1” ( %) Will be described. In this case, the environment data acquisition unit 111 determines from the storage unit 110 that the temperature TV in the greenhouse 1 is in the range of "910.8" to "929.2" and the light intensity LS in the greenhouse 1 is " Environmental data ED having data in the range of 31.779 "to" 32.421 "and the satiety difference HD in the greenhouse 1 of" 19.8 "to" 20.2 "is similar environmental data. Acquire as SED.

In other words, the environmental data acquisition unit 111 determines that the date is “4/30”, the time is “10:00”, the light intensity LS in the greenhouse 1 is “920” (μmol m ⁻² s ⁻¹ ), The temperature TV in the greenhouse 1 is “32.1” (° C.), the saturation difference HD in the greenhouse 1 is “2.00” (kPa), and the carbon dioxide concentration ICD in the greenhouse 1 is “441” (mol mol ⁻¹ ), the carbon dioxide concentration OCD outside the greenhouse 1 is “455” (mol mol ⁻¹ ), the carbon dioxide application rate is “0” (L min ⁻¹ ), and the pure photosynthetic rate is “3.0”. (Mol s ⁻¹ ) and the ventilation frequency “1” (h ⁻¹ ) are associated with each other to acquire the environmental data ED, and the allowable range for acquiring the similar environmental data SED from the storage unit 110 is “±”. The case of setting to 1 "(%) will be described. In this case, the environmental data acquisition unit 111 determines from the storage unit 110 that the light intensity LS in the greenhouse 1 is from “910.8” (μmol m ⁻² s ⁻¹ ) to “929.2” ( μmol m ⁻² s ⁻¹ ) and the temperature TV in the greenhouse 1 is in the range of “31.779” (° C.) to “32.421” (° C.), and the satiation in the greenhouse 1 is The environment data ED in which the HD has data from "19.8" (kPa) to "20.2" (kPa) is acquired as similar environment data SED.

In the example shown in FIG. 5, the past environmental data ED that falls within the range of “± 1” (%) is the environmental data ED with the date “4/20” and the time “13:00”. The environment data acquisition unit 111 acquires the environment data ED with the date “4/20” and the time “13:00” as the similar environment data SED.
An example of the past environmental data ED that does not fall within the range of “± 1” (%) is the environmental data ED with the date “4/20” and the time “13:05”. In the environmental data ED with the date “4/20” and the time “13:05”, the light intensity LS in the greenhouse 1 and the satiety difference HD in the greenhouse 1 are not within the range. Therefore, the environment data acquisition unit 111 does not select the environment data ED with the date “4/20” and the time “13:05”.

[Calculation of Relationship between Carbon Dioxide Concentration ICD in Greenhouse 1 and Pure Photosynthetic Rate]
Next, with reference to FIGS. 6 and 7, the carbon dioxide consumption rate UD calculated by the consumption rate calculation unit 112 will be described.
FIG. 6 is a diagram showing an example of the relationship between the carbon dioxide concentration ICD in the greenhouse 1 and the pure photosynthetic rate.

The consumption speed calculation unit 112 acquires the environment data ED and the similar environment data SED from the environment data acquisition unit 111. The consumption rate calculation unit 112, based on the relationship between the carbon dioxide concentration ICD in the greenhouse 1 included in the similar environment data SED acquired from the environment data acquisition unit 111 and the pure photosynthetic rate, indicates the environmental conditions indicated by the environmental data ED. Calculate the rate of carbon dioxide consumption UD of the plant NP in.
Specifically, the consumption rate calculation unit 112 shows the relationship between the carbon dioxide concentration ICD in the greenhouse 1 included in the similar environment data SED on the horizontal axis and the net photosynthetic rate of the plant NP in the greenhouse 1 on the vertical axis. Generate a graph. More specifically, the consumption rate calculation unit 112 calculates a relative value between the latest dark respiration rate and the latest dark respiration rate on the day when the similar environment data SED is recorded. The consumption rate calculation unit 112 corrects the pure photosynthetic rate included in the similar environment data SED based on the calculated relative value. The consumption rate calculation unit 112 plots the corrected net photosynthetic rate on a graph showing the relationship between the carbon dioxide concentration ICD in the greenhouse 1 and the net photosynthetic rate of the plant NP in the greenhouse 1 on the vertical axis.

The consumption rate calculation unit 112 repeats the process until the correction of the pure photosynthetic rate included in all the similar environment data SED acquired by the environment data acquisition unit 111 is completed.
The consumption rate calculation unit 112 performs regression analysis on each value of the corrected pure photosynthetic rate. The consumption rate calculation unit 112 calculates a regression line L1 shown in FIG. 6 as a result of regression analysis of the corrected pure photosynthetic rate.

  In the above description, the consumption rate calculation unit 112 consumes carbon dioxide based on the graph showing the relationship between the carbon dioxide concentration ICD in the greenhouse 1 and the vertical photosynthetic rate of the plant NP in the greenhouse 1 on the vertical axis. The case where the speed UD to be calculated is calculated has been described, but this is an example for description, and the consumption speed calculation unit 112 does not need to plot it on the graph. The consumption rate calculation unit 112 may perform regression analysis based on the corrected pure photosynthetic rate and the carbon dioxide concentration.

Next, with reference to FIG. 7, a description will be given of the difference between the case where the consumption rate calculation unit 112 corrects the pure photosynthetic rate of the similar environment data SED and the case where the correction is not performed.
FIG. 7 is a diagram showing an example of a case where the pure photosynthetic rate of the similar environment data SED is corrected and a case where it is not corrected.
FIG. 7A is an example of the pure photosynthetic rate calculated by performing the correction based on the relative value calculated from the dark respiration rate.
FIG. 7B is an example of a case where the pure respiration rate included in the similar environment data SED is directly plotted without correction.
Comparing FIG. 7A and FIG. 7B, it can be seen that the corrected FIG. 7A can obtain a pure photosynthetic rate that is similar to the measured pure photosynthetic rate.

[Estimation of CP curve]
Next, the CP curve estimated by the application speed estimation unit 113 will be described.
FIG. 8 is a diagram showing an example of the CP curve estimated by the application speed estimation unit 113.
FIG. 8 is a diagram showing an example of a CP curve estimated by the application rate estimation unit 113 at a certain time on the 18th day after the carbon dioxide application support device 100 acquires the environmental information in the greenhouse 1.
In FIG. 8, the light intensity LS in the greenhouse 1 is “200” (μmol m ⁻² s ⁻¹ ) and the allowable range of the similar environment data SED acquired from the storage unit 110 is “± 50” (μmol m ⁻² s ^{−). 1} ), the temperature TV in the greenhouse 1 is “25” (° C.), and the allowable range of the similar environmental data SED acquired from the storage unit 110 is “± 5” (° C.), and the satiety difference HD in the greenhouse 1 is “ The allowable range of the similar environment data SED acquired from 1.5 "(kPa) and the storage unit 110 is a CP curve calculated from the similar environment data SED that meets the environmental condition of" ± 1.0 "(kPa).

FIG. 9 is a diagram showing an example of the CP curve estimated by the application speed estimation unit 113.
FIG. 9 is a diagram showing an example of the CP curve estimated by the application rate estimation unit 113 at a certain time on the 18th day after the carbon dioxide application support device 100 acquires the environmental information in the greenhouse 1.
In FIG. 9, the light intensity LS in the greenhouse 1 is “300” (μmol m ⁻² s ⁻¹ ) and the allowable range of the similar environment data SED acquired from the storage unit 110 is “± 50” (μmol m ⁻² s ^{−). 1} ), the temperature TV in the greenhouse 1 is “30” (° C.), and the allowable range of the similar environmental data SED acquired from the storage unit 110 is “± 5” (° C.), and the satiety difference HD in the greenhouse 1 is “ The allowable range of the similar environment data SED acquired from 2.0 "(kPa) and the storage unit 110 is a CP curve estimated from the similar environment data SED that meets the environmental condition of" ± 1.0 "(kPa).

  Comparing the regression line L2 shown in FIG. 8 with the regression line L3 shown in FIG. 9, it can be seen that the environment shown in FIG. 9 has a higher effect of increasing the net photosynthetic rate of the plant NP by the carbon dioxide application. The manager of the greenhouse 1 will enter the conditions for determining the carbon dioxide application rate in the greenhouse 1 based on the shape of the regression line.

[Relationship between environmental data ED and CP curve estimation accuracy]
Up to this point, an example of the operation in which the carbon dioxide application support device 100 calculates the CP curve has been described.
Next, the relationship between the amount of the environmental data ED stored in the storage unit 110 and the accuracy of the pure photosynthesis rate estimated by the carbon dioxide application support device 100 will be described with reference to FIGS. 10 to 11.
FIG. 10 is a diagram showing an example of the relationship between the amount of environment data ED stored in the storage unit 110 and the pure photosynthetic rate calculated by the consumption rate calculation unit 112.
FIG. 10A shows an example of the pure photosynthetic rate calculated by the consumption rate calculating section 112 when the environment data ED for 7 days is stored in the storage section 110.
FIG. 10B shows an example of the pure photosynthetic rate calculated by the consumption rate calculator 112 when the environment data ED for 12 days is stored in the storage 110.
FIG. 10C shows an example of the pure photosynthetic rate calculated by the consumption rate calculating section 112 when the environmental data ED for 17 days is stored in the storage section 110.
The consumption rate calculation unit 112 can calculate an accurate pure photosynthetic rate as the amount of the environmental data ED stored in the storage unit 110 increases.

FIG. 11 is a diagram showing an example of the relationship between the permissible range of the similar environment data SED acquired by the environment data acquisition unit 111 from the storage unit 110 and the pure photosynthetic speed calculated by the consumption speed calculation unit 112.
In FIG. 11A, the consumption rate calculation unit 112 is set based on the result obtained by setting the allowable range of the light intensity LS in the greenhouse 1 to “± 10” and acquiring the similar environment data SED from the storage unit 110. An example of the pure photosynthetic rate calculated by
In FIG. 11B, the consumption rate calculation unit 112 is set based on the result obtained by setting the allowable range of the light intensity LS in the greenhouse 1 to “± 50” and acquiring the similar environment data SED from the storage unit 110. An example of the pure photosynthetic rate calculated by
In FIG. 11C, the consumption rate calculation unit 112 is set based on the result obtained by setting the allowable range of the light intensity LS in the greenhouse 1 to “± 300” and acquiring the similar environment data SED from the storage unit 110. An example of the pure photosynthetic rate calculated by
The consumption rate calculation unit 112 can calculate a more accurate pure photosynthetic rate as the allowable range is narrower. In this case, it is preferable that sufficient environmental data ED be stored in the storage unit 110. When narrowing the allowable range of the similar environment data SED acquired by the environment data acquisition unit 111, if sufficient environment data ED is not stored in the storage unit 110, the similar environment data SED acquired by the environment data acquisition unit 111 The number will decrease. If the similar environment data SED is small, the consumption rate calculation unit 112 may not be able to accurately calculate the pure photosynthetic rate.

As described above, the carbon dioxide application support device 100 includes the environmental condition acquisition unit 101, the exchange speed calculation unit 108, the environmental data generation unit 109, the environmental data acquisition unit 111, the consumption speed calculation unit 112, and And an application speed estimation unit 113.
The environmental condition acquisition unit 101 acquires environmental conditions inside and outside the greenhouse 1 from the measurement unit 10 provided in the greenhouse 1. The exchange rate calculation unit 108 calculates the carbon dioxide exchange rate PS of the plant NP in the greenhouse 1 based on the environmental conditions acquired by the environmental condition acquisition unit 101 and the air volume AC of the greenhouse 1. The carbon dioxide exchange rate PS is the net photosynthetic rate of plant NP and the dark respiration rate. The exchange rate calculation unit 108 calculates the dark respiration rate and the pure photosynthetic rate performed by the plant NP in the greenhouse 1 based on the light intensity LS in the greenhouse 1.

  The environmental data generation unit 109 associates the environmental condition acquired by the environmental condition acquisition unit 101 with the carbon dioxide exchange rate PS calculated by the exchange rate calculation unit 108, and stores the environmental data ED in the storage unit 110. The environment data acquisition unit 111 acquires environment data ED similar to the environment data ED generated by the environment data generation unit 109 from the storage unit 110 as similar environment data SED. The consumption speed calculation unit 112, based on the environmental data ED acquired by the environmental data acquisition unit 111 and the similar environmental data SED, the speed at which the plant NP in the greenhouse 1 consumes carbon dioxide based on the environmental data ED. Calculate UD. Here, the consumption rate calculation unit 112 calculates the rate UD of consuming carbon dioxide by performing correction based on the relative value between the dark respiration rate of the plant NP immediately before and the past dark respiration rate of the plant NP. ..

The application rate estimation unit 113 estimates the CP curve based on the carbon dioxide consumption rate UD calculated by the consumption rate calculation unit 112.
That is, the application rate estimation unit 113 calculates a curve of the pure photosynthetic rate with respect to the carbon dioxide application rate according to the environmental conditions inside and outside the greenhouse 1. Moreover, the application speed estimation unit 113 displays the calculated CP curve on the display unit 114 as a graph. As a result, the manager of the greenhouse 1 inputs the conditions for determining the rate of carbon dioxide application in the greenhouse 1 from the shape of the graph indicated by the CP curve. For example, even if the window 20 provided in the greenhouse 1 is opened to adjust the environment inside the greenhouse 1, the carbon dioxide application support device 100 is based on a change in the carbon dioxide consumption efficiency due to a change in the plant growth environment. Then, the application rate of carbon dioxide that applies carbon dioxide in an amount corresponding to the consumption efficiency in the greenhouse can be automatically and sequentially estimated according to the conditions input by the administrator.
Heretofore, the case where the application rate estimation unit 113 displays the estimated carbon dioxide application rate AS by the CP curve has been described. The carbon dioxide application rate AS estimated by the application rate estimation unit 113 is not limited to a curve. The application rate estimating unit 113 may display the words by using a word, a numerical value, a chart, or the like, based on the estimated degree of inclination of the CP curve or the sequential change of the CP curve.

  The carbon dioxide application support device 100 described above may not include the storage unit 110. In this case, the carbon dioxide application support device 100 may store the environmental data ED in another device connected to the network, a server, or the like.

  In the above-described example, the method of vegetating the plant NP in the greenhouse 1 once and acquiring the environmental data ED and calculating the CP curve until the plant NP is harvested has been described. In the case of repeatedly vegetating the same kind of plants NP and the same amount of plants NP in the same greenhouse 1, the carbon dioxide application support device 100 diverts a part of the past environmental data ED to obtain a CP curve. It may be estimated. When the environmental data ED can be diverted, when the CP curve is estimated without diverting the environmental data ED in the current environment, even if the amount of the environmental data ED is insufficient, an appropriate application rate of carbon dioxide can be obtained. AS can be estimated.

  Further, in the above-described embodiment, the carbon dioxide application support device 100 has been described with respect to the configuration for estimating the CP curve shown in FIG. 8 or 9, but the configuration is not limited to this. The application speed estimation unit 113 may further calculate a value related to the state of the plant NP based on the carbon dioxide consumption speed UD calculated by the consumption speed calculation unit 112. Specifically, the application rate estimation unit 113 may estimate the parameter calculated based on the pure photosynthetic rate shown on the vertical axis of the CP curve as the vertical axis. For example, the application rate estimation unit 113 may estimate the relationship between the carbon dioxide application rate applied to the plant NP in the greenhouse 1 and the degree of growth of the plant NP in the greenhouse 1. The degree of growth is a foliage elongation rate that indicates the degree of elongation of the foliage including the growth point of the plant NP, and a stem increase rate that indicates the degree of stalk increase of the plant NP. Further, the application rate estimation unit 113 may estimate the relationship between the carbon dioxide application rate applied to the plant NP in the greenhouse 1 and the transpiration rate of the plant NP in the greenhouse 1. The transpiration rate is the transpiration amount of water vapor released from the plant NP into the atmosphere per unit time. In this example, it is the transpiration amount of water vapor released from the plant NP into the greenhouse 1 per unit time.

The degree of growth described above is further calculated based on a captured image in which a predetermined growth point of a plant NP in the greenhouse 1 is captured by an imaging device (not shown). In the captured image in which a predetermined growing point is captured, the morphology of the foliage including the shoot apex growth point is captured. The shoot apex growth point is the growth point at the tip of the main stem.
The imaging device generates a plurality of picked-up images at predetermined growth points of the plant NP in the greenhouse 1 at time intervals. The application speed estimation unit 113 acquires the captured image generated by the imaging device. The application speed estimation unit 113 analyzes the foliage extension speed of the plant NP and the increase speed of the diameter of the stem based on the plurality of captured images acquired from the imaging device. Further, the application rate estimation unit 113 may calculate the amount of the fertilizer component given to the plant NP based on the analyzed growth rate of the foliage portion. When the application rate estimation unit 113 calculates the amount of the fertilizer component to be given to the plant NP based on the analyzed foliage growth rate, the storage unit 110 stores the type of the fertilizer component according to the foliage growth rate in advance, Fertilizer component information indicating the amount is stored.

In the following description, the case where the plant NP is a tomato strain will be described. The imaging device images a plurality of growth points of the main stem of tomato at time intervals. The growth point of the main stem of tomato is in the range of 20 to 30 (cm) from the tip of the main stem. The application rate estimation unit 113 grows the growth point of the main stem based on the captured image captured at the time when the plant NP starts photosynthesis and the captured image captured at the time when the plant NP ends photosynthesis. The rate of foliage elongation and the rate of stalk increase indicating the degree of Generally, the elongation rate of the main stem and the diameter (thickness) of the main stem showing the degree of growth of tomato vary depending on the component and amount of the given fertilizer component. If the growth rate of the main stem and the increase rate of the diameter of the main stem are known, it is possible to know whether or not the growth environment conditions for several days were appropriate.
The application rate estimation unit 113 determines the current degree of growth of the tomato plant according to the rate of increase in the diameter of the main stem of the tomato plant captured in the captured image. The application rate estimation unit 113 calculates the component and amount of the fertilizer component to be given to the tomato plant in the greenhouse 1 based on the determined degree of growth of the tomato plant and the fertilizer component information stored in the storage unit 110. To do.

  As described above, the application rate estimation unit 113 calculates the amount of the fertilizer component given to the plant NP based on the degree of growth of the plant NP, so that the plant NP fertilizer component growth (other than the reproductive organs) in the greenhouse 1 is calculated. It is possible to evaluate the balance between the region growth) and the reproductive growth (growth of the reproductive organs), and estimate the growth environment conditions so as to achieve the desired balance at the present time. That is, the carbon dioxide application support device 100 can appropriately estimate the amount of fertilizer components to be supplied to the plant NP in the greenhouse 1 based on the environmental data ED and the captured image of the plant NP. In the above description, the case where the type of plant NP is a tomato strain has been described, but the tomato strain is an example, and the present invention is not limited to this.

  Further, the application rate estimation unit 113 may further estimate the relationship between at least one of the other environmental conditions in the greenhouse 1 and the rate UD of consuming carbon dioxide. The other environmental conditions in the greenhouse 1 are the satiety difference HD in the greenhouse 1, the temperature TV in the greenhouse 1, or the liquid supply rate to the plant NP. Specifically, the application rate estimation unit 113 may set the carbon dioxide application rate UD applied to the plant NP in the greenhouse 1 shown on the horizontal axis of the CP curve to another environmental condition in the greenhouse 1. That is, the application rate estimation unit 113 may estimate the relationship between the pure photosynthetic rate and environmental conditions other than the carbon dioxide application rate applied to the plant NP in the greenhouse 1.

  In this case, the application rate estimation unit 113, based on the environment data ED acquired by the environment data acquisition unit 111 and the similar environment data SED, the dark respiration rate immediately before the plant NP and the past darkness of the plant NP. By performing the correction based on the relative value with the respiration rate, the environment other than the net photosynthetic rate of the plant NP in the greenhouse 1 at the time of acquiring the environmental data ED and the carbon dioxide application rate applied to the plant NP in the greenhouse 1 Estimate the relationship with the condition.

  Thereby, the application rate estimation unit 113 is not limited to the relationship between the pure photosynthetic rate and the carbon dioxide application rate indicated by the CP curve, and can estimate the information used for controlling the environment for growing the plant NP in the greenhouse 1. it can.

  Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and appropriate modifications may be made without departing from the spirit of the present invention. it can.

  The carbon dioxide application support device 100 described above has a computer inside. The process of each process of the above-described device is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing the program. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, the computer program may be distributed to the computer via a communication line, and the computer that receives the distribution may execute the program.

Further, the program may be for realizing a part of the functions described above.
Further, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

  1 ... Greenhouse, 10 ... Measuring part, 11 ... Temperature sensor, 12 ... Light intensity sensor, 13 ... Indoor carbon dioxide concentration measurement sensor, 14 ... Outdoor carbon dioxide concentration measurement sensor, 15 ... Saturation difference calculation device, 16 ... Ventilation frequency measurement Part, 17 ... Carbon dioxide application control device, 18 ... Greenhouse information device, 20 ... Window, 100 ... Carbon dioxide application support device, 114 ... Display part, 101 ... Environmental condition acquisition part, 102 ... Temperature acquisition part, 103 ... Light intensity Acquisition unit, 104 ... Saturation acquisition unit, 105 ... Indoor carbon dioxide concentration acquisition unit, 106 ... Outdoor carbon dioxide concentration acquisition unit, 107 ... Ventilation frequency acquisition unit, 108 ... Exchange rate calculation unit, 109 ... Environmental data generation unit, 110 ... storage unit, 111 ... environmental data acquisition unit, 112 ... consumption rate calculation unit, 113 ... application speed estimation unit, TV ... temperature in greenhouse, LS ... light intensity in greenhouse, HD ... satiety difference in greenhouse, I D ... Carbon dioxide concentration in greenhouse, OCD ... Carbon dioxide concentration outside greenhouse, VC ... Ventilation frequency, AC ... Air volume, ED ... Environmental data, SED ... Similar environmental data, UD ... Speed of consuming carbon dioxide, AS ... Carbon dioxide application rate

Claims (6)

From a measurement unit that measures the environment inside and outside the greenhouse for growing plants, an environmental condition acquisition unit that acquires the environmental conditions under which the plants are grown,
Of the environmental conditions acquired by the environmental condition acquisition unit, based on the carbon dioxide concentration in the greenhouse, the carbon dioxide concentration outside the greenhouse, the ventilation frequency of the greenhouse, and the light intensity in the greenhouse, An exchange rate calculation unit that calculates the exchange rate of carbon dioxide performed by the plants in the greenhouse,
An environmental data generation unit that generates environmental data in which the environmental conditions acquired by the environmental condition acquisition unit and the exchange rate of the carbon dioxide calculated by the exchange rate calculation unit are associated with each other,
From the environmental data generated by the environmental data generation unit in the past, an environmental data acquisition unit that acquires environmental data similar to the environmental conditions acquired by the environmental condition acquisition unit as similar environmental data,
Based on the similar environmental data acquired by the environmental data acquisition unit, and the exchange rate of the carbon dioxide calculated by the exchange rate calculation unit, the rate at which the plants in the greenhouse consume carbon dioxide in the greenhouse A consumption speed calculation unit for calculating,
Based on the volume of the greenhouse, the consumption speed calculated by the consumption speed calculation unit, and the ventilation frequency of the greenhouse out of the environmental conditions acquired by the environmental condition acquisition unit, and is applied to the greenhouse. A carbon dioxide application support device, comprising: an application rate estimation unit that estimates the relationship between the application rate of carbon dioxide and the consumption rate. The consumption rate calculation unit,
The consumption rate is calculated based on a relative value between the exchange rate of the carbon dioxide calculated by the exchange rate calculation unit and the exchange rate of the carbon dioxide included in the similar environment data. Carbon dioxide application support device. The carbon dioxide application support device according to claim 2, wherein the application speed estimation unit further calculates a value related to the state of the plant based on the consumption speed calculated by the consumption speed calculation unit. The value related to the state of the plant, the foliage growth rate showing the speed of elongation of the foliage including the shoot apex growth point of the plant, transpiration showing the amount per unit time of water evaporated from the plant. The carbon dioxide application support device according to claim 3, wherein at least one of the speeds is included. The environmental conditions include a condition of a satiety difference in the greenhouse, a condition of an air temperature in the greenhouse, a condition of a liquid supply rate supplied to the plant,
The carbon dioxide application support device according to any one of claims 1 to 4, wherein the application rate estimation unit further estimates a relationship between at least one of the environmental conditions and the consumption rate. .. On the computer,
From the measurement unit that measures the environment inside and outside the greenhouse for growing plants, an environmental condition acquisition step for acquiring the environmental conditions under which the plants are grown,
Among the environmental conditions acquired in the environmental condition acquisition step, based on the carbon dioxide concentration in the greenhouse, the carbon dioxide concentration outside the greenhouse, the ventilation frequency of the greenhouse, and the light intensity in the greenhouse. A respiration rate calculation step of calculating a carbon dioxide exchange rate performed by the plants in the greenhouse,
An environmental data generation step of generating environmental data in which the environmental conditions acquired in the environmental condition acquisition step and the exchange rate of the carbon dioxide calculated in the respiratory rate calculation step are associated with each other,
From the environmental data generated in the past in the environmental data generation step, environmental data acquisition step of acquiring environmental data similar to the environmental conditions acquired in the environmental condition acquisition step as similar environmental data,
Based on the similar environmental data acquired in the environmental data acquisition step and the exchange rate of the carbon dioxide calculated in the respiration rate calculation step, the plants in the greenhouse consume carbon dioxide in the greenhouse. A consumption speed calculation step for calculating the speed,
Based on the volume of the greenhouse, the consumption speed calculated in the consumption speed calculation step, and the number of ventilations of the greenhouse among the environmental conditions acquired in the environmental condition acquisition step, in the greenhouse. A carbon dioxide application support program for executing an application rate estimation step of estimating a relationship between an application rate of applied carbon dioxide and the consumption rate.

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