CN112241818A - Method for determining methane emission in rice field - Google Patents

Method for determining methane emission in rice field Download PDF

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CN112241818A
CN112241818A CN201910586844.1A CN201910586844A CN112241818A CN 112241818 A CN112241818 A CN 112241818A CN 201910586844 A CN201910586844 A CN 201910586844A CN 112241818 A CN112241818 A CN 112241818A
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rice
methane
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郭玥锋
姜涵
钱晶
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Suzhou Wuyun Mingtai Technology Co ltd
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Abstract

The embodiment of the disclosure discloses a method for determining methane emission of a rice field. One embodiment of the method comprises: acquiring position range information of a target rural area; according to the position range information, acquiring the rice field planting information in the range prompted by the position range information, wherein the rice field planting information comprises: the sowing area of the rice field and the type of the rice field; determining at least one planting type of the rice field according to the planting information of the rice field; determining, for each of said at least one planting type of rice field, the amount of methane emitted by the rice field during the course of a year of growth; and (4) summarizing the methane emission of the rice fields of various planting types, and determining the methane emission of the rice fields in the target rural area. The embodiment realizes the improvement of the accuracy of the accounting result.

Description

Method for determining methane emission in rice field
Technical Field
The embodiment of the application relates to the technical field of environmental protection, in particular to a method for determining methane emission in a rice field.
Background
China is one of the countries with the longest history of rice production and the most abundant genetic resources of rice. At present, rice plants in China are widely distributed, but no matter single-season rice, double-season early rice and late rice, methane gas is emitted to the atmosphere in the growing process of the rice. Methane gas belongs to one kind of greenhouse gas, and the global warming effect is aggravated due to the emission of a large amount of greenhouse gas, and even the consequences of increased plant diseases and insect pests, sea level rise, abnormal climate, increased ocean storm, arid land, increased desertification area and the like can be caused. In order to achieve better environmental protection, it is necessary to determine the methane gas discharged from each paddy field. However, the current accounting methods cannot meet the requirements.
Disclosure of Invention
Embodiments of the present disclosure provide a method of determining methane emission from a rice field, the method including: acquiring position range information of a target rural area; according to the position range information, acquiring the rice field planting information in the range prompted by the position range information, wherein the rice field planting information comprises: the sowing area of the rice field and the type of the rice field; determining at least one planting type of the rice field according to the planting information of the rice field; determining, for each of said at least one planting type of rice field, the amount of methane emitted by the rice field during the course of a year of growth; and (4) summarizing the methane emission of the rice fields of various planting types, and determining the methane emission of the rice fields in the target rural area.
In some embodiments, the discharge amount of the paddy field is transmitted to a discharge amount display device according to the determined discharge amount of methane generated in the paddy field during the growth of one year, wherein the discharge amount of the paddy field is displayed by the methane discharge amount terminal.
In some embodiments, determining an amount of methane emitted from the rice field during a year of growth for each of the at least one planting type comprises:
determining the methane emission of the rice field according to the following formula:
ECH4＝∑EFi×ADi，
wherein the content of the first and second substances,ECH4representing the total methane emission of the rice field;
expressing classification of paddy fields, wherein the classification of the paddy fields comprises single-season paddy rice, double-season paddy rice and late rice;
EFirepresenting the methane emission factor of the i-th paddy field;
ADiindicates the planting area of the i-th rice.
In some embodiments, the method includes transmitting the methane emission to an emission display device according to the determined methane emission generated by the paddy field during the growth of the paddy field in one year, wherein the emission display device displays the methane emission, and the method includes the following steps: receiving selection operation sent by a user through a terminal, wherein the selection operation comprises at least one of the following operations: displaying the total methane emission amount of the rice field, the methane emission amount of single-season rice in the rice field, the methane emission amount of double-season rice in the rice field and the methane emission amount of late rice in the rice field; determining corresponding data of methane emission according to received selection operation sent by a user, wherein the emission display equipment displays the corresponding methane emission; the methane emission device is used for displaying the methane emission of a plurality of rice types, and the methane emission device is used for sequencing the emission of the rice types or displaying the methane emission of the rice types to a terminal of a user in a form of a histogram.
In some embodiments, the methane emission corresponding to the selection operation is compared with a preset emission threshold, and if the methane emission is greater than the preset emission threshold, the emission display device flashes a red light and displays the data of the methane emission in a highlighted color.
In some embodiments, if the methane emission is greater than a preset emission threshold, a reminding instruction is sent to an alarm system, wherein the alarm system transmits the reminding instruction to a terminal connected with the alarm system, and the transmission instruction comprises the methane emission and the position range information of the rice field.
Compared with the prior art, the method for determining the methane emission of the rice field provided by the embodiment of the application has the advantages that the accuracy of the accounting result is greatly improved by the method for accounting the methane emission of different types of rice fields.
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Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is an exemplary system architecture diagram to which some embodiments according to the present disclosure may be applied;
FIG. 2 is a flow chart of one embodiment of a method of determining methane emissions from a rice field according to some embodiments of the present disclosure;
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for the convenience of description, only the parts related to the related applications are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring first to fig. 1, an exemplary system architecture 100 for a method of determining greenhouse gas emissions in forest conversion to which embodiments of the present disclosure may be applied is shown.
As shown in fig. 1, the system architecture 100 may include terminal devices 101, 102, 103, a network 104, and a server 105. The network 104 serves as a medium for providing communication links between the terminal devices 101, 102, 103 and the server 105. Network 104 may include various connection types, such as wired, wireless communication links, or fiber optic cables, to name a few.
The user may use the terminal devices 101, 102, 103 to interact with the server 105 via the network 104 to receive or send messages or the like. The terminal devices 101, 102, 103 may have various communication client applications installed thereon, such as a web browser application, a shopping application, a search application, an instant messaging tool, a mailbox client, social platform software, and the like.
The user may use the terminal devices 101, 102, 103 to interact with the server 105 via the network 104 to receive or send messages or the like. The terminal devices 101, 102, 103 may have various communication client applications installed thereon, such as a web browser application, an instant messaging tool, and social platform software.
The terminal devices 101, 102, 103 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, e-book readers, laptop portable computers, desktop computers, and the like.
The server 105 may be a server that provides various services, such as a service that provides data processing and data transmission to applications installed on the terminal apparatuses 101, 102, 103.
It should be noted that the method for determining the greenhouse gas emission amount in forest conversion provided by the embodiment of the disclosure is generally executed by the server 105.
It should be noted that the server may be hardware or software. When the server is hardware, it may be implemented as a distributed server cluster formed by multiple servers, or may be implemented as a single server. When the server is software, it may be implemented as multiple pieces of software or software modules, for example, to provide distributed services, or as a single piece of software or software module. And is not particularly limited herein.
It should be understood that the number of terminal devices, networks, and servers in fig. 1 is merely illustrative. There may be any number of terminal devices, networks, and servers, as desired for implementation.
Referring next to fig. 2, a flow diagram 200 of one embodiment of a method of determining methane emissions from a rice field is shown, in accordance with embodiments of the present disclosure.
Step 201, obtaining the position range information of the target rural area.
In the present embodiment, the execution subject of the method of determining the methane emission amount of the paddy field in the target rural area may be a methane emission amount monitoring system. Generally, for a particular country, the country typically contains multiple rice fields. The methane emission is mainly concentrated in the above-mentioned multiple paddy fields.
As an example, the methane emission monitoring system may store statistical data of the administrative unit in the target rural area, and further, may obtain the location range information of the paddy field in the target rural area from statistical data of the administrative unit at a local level, the administrative unit at a prefecture level, or a smaller administrative unit. Therefore, the methane emission monitoring system can acquire the position range information of the target rural area through the statistical data.
Step 202, acquiring the rice field planting information within the range prompted by the position range information according to the position range information.
In the present embodiment, the paddy field planting information may be the seeding area of the paddy field and the type of the paddy field. The target rural area rice field planting information can be obtained continuously through the statistical data of the administrative districts with the city level, the administrative units with the county level or the administrative units with the smaller levels, and further, the statistical data of the administrative units with the multiple levels can be fused. Thereby obtaining the sowing area and the type of the rice field in the position range.
And step 203, determining at least one planting type of the rice field according to the planting information of the rice field.
In the present embodiment, the types of rice field planted include single-season rice, double-season early rice and late rice. According to the rice cropping system, the single cropping rice is a rice cropping system which follows only one cropping rice in one year; the double cropping rice follows a rice cropping system for planting and harvesting the double cropping rice in the same rice field in one year; the double-season early rice and late rice are distinguished according to the sowing period, the growing period and the mature period of the rice. Therefore, the rice field planting type can be determined by distinguishing the rice growing system and the growth information according to the geographical position of the rice growth and the sowing period, the growing period and the mature period, and further determining the rice field planting type according to the statistical data obtained from each administrative unit.
In step 204, for each of the at least one planting type of rice field, the amount of methane emitted from the rice field during the growth of the rice field over the course of one year is determined.
In this embodiment, the executing entity determines the methane emission generated during the growth of the rice field in one year according to the following formula:
ECH4＝∑EFi×ADiin which ECH4Indicating the total methane emission of the rice field.
i represents the classification of paddy fields including single-season rice, double-season rice and late rice;
EFiindicating the methane emission factor of the i-th paddy field. For example, the methane emission factor of each paddy field can be obtained based on the average organic fertilizer (including crop straws and farmyard manure) application level, paddy water management mode, climate conditions, rice productivity level (rice yield per unit) and the like of the paddy fields in large areas in 2005, and the specific numerical value can be obtained through actual sampling and determination, or relevant data can be obtained through literature data collection and arrangement and is obtained through statistical analysis and calculation. Or the methane emission factor for single cropping rice in south China, for example, may be 236.7 kilograms of methane gas emitted per hectare; the methane emission factor of double-season early rice in south China can be 241 kilograms of methane gas per hectare; the methane emission factor of double cropping late rice in south China may be 273.2 kilograms of methane gas emitted per hectare.
ADiIndicates the planting area of the i-th rice.
The process of methane discharge in the paddy field is as follows: after the methane in the soil water reaches its maximum saturated solubility, the newly produced methane will aggregate to form bubbles. These bubbles accumulate to a volume, move upward under buoyancy and eventually enter the atmosphere through the water-gas interface. The methane in the bubbles is rarely oxidized in the process. The way is mainly characterized in that when the aeration tissue of the plant is not developed enough in the early growth stage of the rice, the emission of methane gradually transits to the way of entering the atmosphere through the aeration tissue of the plant along with the gradual development of the aeration tissue of the rice.
Alternatively, the methane emission factor of the paddy field can be calculated by dividing the total methane emission amount of the paddy field by the sowing area of the paddy field, so that the total methane emission amount E of the paddy field can be obtained first.
The total discharge E of methane from the rice field is determined according to the following formula:
Figure BDA0002114804680000061
wherein E represents the total discharge of methane from the paddy field, such as the total discharge of methane generated in the target rural paddy field within a set time.
P represents the generation rate of methane in the paddy soil. For example, the production of methane in soil results from the activity of various methanogens under soil reducing conditions, during which the oxidation-reduction potential of the soil has a critical influence.
EpIndicating the discharge rate of methane from the rice field through the plant aeration tissue. For example, in the early stage of rice growth, when the plant aeration tissue is not sufficiently developed, as the rice aeration tissue gradually develops, the methane emission gradually transits to the atmosphere via the plant aeration tissue, and EpIndicating the extent to which methane passes through the plant's aerated tissue in rice fields.
FpIt represents the ratio of the discharge of methane to the atmosphere through the plants to the methane production in the soil. For example, after the maximum saturation solubility of methane in the soil water is reached, newly produced methane will aggregate to form bubbles. These bubbles gather in a volume, move upward under buoyancy and eventually enter the atmosphere through the water-gas interface, FpRepresents the ratio of the amount of methane discharged to the atmosphere by the plants to the amount of methane newly produced in the soil.
Eb1Which means that methane is discharged to the atmosphere in the form of bubbles, for example, newly produced methane will accumulate to form bubbles after the methane in the soil water reaches its maximum saturated solubility. Eb1Representing methane emissions from bubbles moving upward under buoyancy and eventually entering the atmosphere through the water-gas interface.
P is determined according to the following formula:
P＝0.27×FEh×(COM+TI×CR)。
wherein 0.27 represents methane (CH)4) With methanogenic substrate (C)6H12O6) Ratio of molecular weights.
FEhRepresenting the soil oxidation-reduction potential influence function.
COMIndicates the methane matrix (C) produced by daily decomposition of exogenous organic matter6H12O6)。
TI represents the soil temperature influence function.
CRRepresents the daily substrate of methane produced by the metabolism of rice plants.
FEhIs determined by the following formula:
Figure BDA0002114804680000062
where Eh represents the soil oxidation-reduction potential expressed by the prototype as a function of the number of days t after initial irrigation, and Eh 1390t-0.87250, for example, the specific value can be obtained by actual sampling measurement, or can be obtained by literature data collection and arrangement, and can be obtained by statistical analysis and calculation.
COMIs determined according to the following formula:
COM＝0.65×SI×TI×(k1×OMNO+k2×OMSO)。
wherein, COMIndicating the methane matrix produced by daily decomposition of exogenous organic matter.
OMNORepresents the content of the labile component, e.g., represents the initial amount of non-structural organic carbohydrates (exogenous organic labile component).
OMSORepresents the content of recalcitrant components, for example, the initial amount of structural organic functional carbohydrates (exogenous organic recalcitrant components).
k1The first order kinetics, which represents the potential decomposition rate of the readily decomposable component, was 2.7X 10-2，d-1For example, it hasThe volume value can be obtained through actual sampling measurement, and can also be obtained through collecting and sorting literature data and calculating through statistical analysis.
k2The first order kinetics, which represents the potential decomposition rate of the refractory component, was 3.0X 10-3，d-1For example, the specific value can be obtained by actual sampling measurement, or can be obtained by obtaining relevant data through literature data collection and arrangement, and can be obtained through statistical analysis and calculation.
SI denotes the soil texture impact function, which is a dimensionless soil indicator that characterizes the relative impact of soil texture on methane production or release, and is related to the soil SAND content, and 0.325+0.0225SAND, where SAND denotes the percentage of SAND represented in a given soil. SI less than 1, sand ratio less than 30 and greater than 1, and sand percentage greater than 30. For example, the specific value can be obtained by actual sampling measurement, or can be obtained by obtaining relevant data through literature data collection and arrangement, and can be obtained through statistical analysis and calculation.
TI is determined according to the following equation:
Figure BDA0002114804680000071
(Tsoilwhen the temperature is 30 ℃, Tsoil is less than or equal to 40 ℃ when the temperature is 30 ℃.
Wherein, the reduction coefficient of the average soil temperature is calculated by the average soil temperature in the formula to replace TI-Q10 (Tsoil-30/10)(Tsoil. 30 for. tends to be 30 < Tsoil. ltoreq.40 ℃). Coenzyme Q10 is a temperature coefficient with a value of 3. Tsoil is the daily average soil temperature. TI ranges from 1 to 3. T issoil＝4.4+0.76×Tair1Wherein, the data source of Tair is the routine meteorological observation of meteorological department, for example, the above specific values can be obtained by actual sampling measurement, and also can be obtained by collecting and sorting literature data and obtaining related data by statistical analysis and calculation. )
CR: is determined according to the following formula:
CR＝1.8×10-3×VI×SI×W1.25。
wherein VI represents a variety index for identifying the relative difference of the rice variety methane yield, and a rice variety coefficient represents the difference of the rice methane emission rate among different rice varieties under the same other conditions.
EpIs determined according to the following formula:
Ep＝Fp×P。
Fpis determined according to the following formula:
Figure BDA0002114804680000081
w represents the aboveground biomass of the rice plant.
WmaxRepresents the biomass of the aerial part of the maturation period.
W is determined according to the following formula:
Figure BDA0002114804680000082
Wmaxis determined according to the following formula:
Wmax＝9.46×GY0.76。
B0is determined according to the following formula:
B0＝Wmax/W0-1。
wherein GY represents rice yield.
WmaxRepresents the biomass of the aerial part of the maturation period.
W0Represents the biomass of the overground part of the rice in the transplanting period.
t represents the number of days after transplantation.
r represents the intrinsic growth rate of the overground part of rice.
Eb1Is determined according to the following formula:
Eb1＝0.7×(P-P0)×ln(Tsoil)/Wroot。
wherein P is0Indicating soilThe critical methane production rate of bubbles generated after methane in the soil is saturated is 0.002, for example, the specific value can be obtained by actual sampling measurement, or relevant data can be obtained by literature data collection and arrangement and is obtained by statistical analysis and calculation.
WrootIndicating the root biomass of rice.
WrootIs determined according to the following formula:
Wroot＝-0.136×(Wroot+W)0.936。
wherein, for a given value of W, a discretized recursive algorithm (W) is usedroot (0)Starting from 0, Wroot (0)-Wroot (0)< 0.1 as the end condition of the recursion), the corresponding rice root biomass can be calculated.
Eh is determined according to the following formula:
waterflooding process Eh(t+2)＝Eh(t)-DEh×(AEh+min(1，CoM))×(Eh(t)-BEh)。
Draining Process EH(t+1)＝Eh(t)-DEh×(AEh+0.7)×(Eh(t)-BEh)。
Wherein, the water management modes of field baking and intermittent irrigation which are frequently used in rice planting in China. t represents the days after flooding or field baking begins;
Eh(t)a soil Eh value representing time t;
AEhand DEhThe difference coefficients are respectively 0.23 and 0.16, and for example, the specific values can be obtained by actual sampling measurement, or relevant data can be obtained by literature data collection and arrangement, and the data can be obtained by statistical analysis and calculation.
BEhRepresenting the upper limit (for field baking process) and the lower limit (for flooding process) of the assumed soil Eh value, the values are respectively 300mv and-250 mv, for example, the specific value can be obtained by actual sampling and measurement, or the relevant data can be obtained by document data collection and arrangement, and the statistical analysis and calculation are carried outAnd (4) obtaining.
For intermittent irrigation, due to different irrigation frequencies, the soil is different in degree of keeping moist, and under the condition, the Eh value of the soil randomly fluctuates around-20 mv, the fluctuation amplitude is 10-20 mv, for example, the specific numerical value can be obtained through actual sampling measurement, or relevant data can be obtained through document data collection and arrangement, and the data can be obtained through statistical analysis and calculation.
In addition, various main factors influencing the methane emission of the rice field in the rice growing season are quantized in a CH4MOD model and serve as input parameters, and the factors comprise rice yield, rice field exogenous organic matter addition amount data (OM), rice variety parameters, percentage content of sand grains in rice field soil, soil temperature, rice transplanting and harvesting date data, rice field water management modes, different water management date data and the like.
And step 205, summarizing the methane emission amount of the rice fields of all the planting types, and determining the methane emission amount of the rice fields in the target rural areas.
In this embodiment, the executing entity may obtain the methane emission amount emitted during the growth process of each rice field in the target rural area through the exemplary method of the above steps 202, 203 and 204, and may determine the total amount of the greenhouse gas emitted by the semiconductor enterprises in the target urban area by summing up the methane emission amount.
In some optional implementations of this embodiment, the method may further include: and transmitting the discharge amount of the rice field to a discharge amount display device according to the determined discharge amount of methane generated in the growth process of the rice field in one year, wherein the discharge amount of the rice field is displayed by a methane discharge amount terminal.
Optionally, the above embodiment may further perform the following steps:
receiving a selection operation sent by a user through a terminal, wherein the selection operation comprises at least one of the following operations: displaying the total methane emission amount of the rice field, the methane emission amount of single-season rice in the rice field, the methane emission amount of double-season rice in the rice field and the methane emission amount of late rice in the rice field;
determining corresponding data of methane emission according to received selection operation sent by a user, wherein the emission display equipment displays the corresponding methane emission;
and for displaying the methane emission amount of a plurality of rice types, the methane emission amount equipment sorts the emission amount according to the emission amount, or displays the methane emission amount of the rice types to the terminal of the user in a form of a histogram.
Alternatively, the selection operation may be a display instruction of the methane gas emission amount of one or more rice field types input by the user on the emission amount display device with the man-machine interaction interface through clicking, sliding, pressing, shifting and the like. For example, the emission amount display device may be a device installed with an application program matching the server, such as a mobile phone, a tablet, and a computer, through which the user performs a selection operation to send a request to the server. The server transmits data of the methane emission amount corresponding to the selection operation to the emission amount display device according to the detected selection operation of the user. The user can check the methane emission amount corresponding to the selection operation through the emission amount display device.
Optionally, the above embodiment may further perform the following steps:
comparing the methane emission corresponding to the selection operation with a preset emission threshold, and if the methane emission is greater than the preset emission threshold, flashing a red light by the emission display device and displaying the data of the methane emission in a highlighted color;
and if the methane emission is greater than a preset emission threshold, sending a reminding instruction to an alarm system, wherein the alarm system transmits the reminding instruction to a terminal connected with the alarm system, and the transmission instruction comprises the methane emission and the position range information of the rice field.
In the present embodiment, the execution main body compares the methane emission amount called by the user with a preset emission amount threshold. The threshold value can be set manually, the specific set rule can be obtained through actual sampling measurement, or relevant data can be obtained through document data collection and arrangement and is obtained through statistical analysis and calculation. And if the methane emission is greater than a preset emission threshold, the execution main body sends a reminding instruction to an alarm system connected with the execution main body. The alarm system transmits the methane emission and the position range information of the rice field to a terminal used by a user, and meanwhile, warning operations such as alarm sound or flashing light can be accompanied.
The methane discharge amount of one or more rice field types is output through the discharge amount display equipment, so that the query of the data of the methane discharge amount is more visual. In addition, the user can be clearly and definitely informed and reminded by comparing the methane emission with a preset threshold value and sending a reminding instruction to the user by an alarm system.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the invention.

Claims (6)

1. A method of determining methane emission from a rice field comprising:
acquiring position range information of a target rural area;
according to the position range information, rice field planting information in a range prompted by the position range information is acquired, and the rice field planting information comprises: the sowing area of the rice field and the type of the rice field;
determining at least one planting type of the rice field according to the planting information of the rice field;
determining, for each of said at least one planting type of rice field, the amount of methane emitted by the rice field during the course of a year of growth;
and (4) summarizing the methane emission of the rice fields of various planting types, and determining the methane emission of the rice fields in the target rural area.
2. The method of claim 1, further comprising:
and transmitting the discharge amount of the rice field to a discharge amount display device according to the determined discharge amount of methane generated in the growth process of the rice field in one year, wherein the discharge amount of the rice field is displayed by the methane discharge amount terminal.
3. The method of claim 1, wherein said determining, for each of said at least one plant type, the amount of methane emitted from the rice field during the course of a year comprises:
determining the methane emission of the rice field according to the following formula:
ECH4＝∑EFi×ADi，
wherein E isCH4Representing the total methane emission of the rice field;
i represents the classification of paddy fields, including single-season rice, double-season rice and late rice;
EFirepresenting the methane emission factor of the i-th paddy field;
ADiindicates the planting area of the i-th rice.
4. The method as claimed in claim 2, wherein the transmitting of the methane emission to an emission display device according to the determined methane emission generated from the rice field during the growth of the rice field for one year, wherein the emission display device displays the methane emission comprises:
the execution main body receives a selection operation sent by a user through a terminal, wherein the selection operation comprises at least one of the following operations: displaying the total methane emission amount of the rice field, the methane emission amount of single-season rice in the rice field, the methane emission amount of double-season rice in the rice field and the methane emission amount of late rice in the rice field;
determining corresponding data of methane emission according to received selection operation sent by a user, wherein the emission display equipment displays the corresponding methane emission;
and for displaying the methane emission amount of a plurality of rice types, the methane emission amount equipment sorts the emission amount according to the emission amount, or displays the methane emission amount of the rice types to the terminal of the user in a form of a histogram.
5. The method of claim 4, further comprising:
and comparing the methane emission corresponding to the selection operation with a preset emission threshold, and if the methane emission is greater than the preset emission threshold, the emission display equipment flickers a red light and displays the data of the methane emission in a highlighted color.
6. The method of claim 5, further comprising:
and if the methane emission is greater than a preset emission threshold, sending a reminding instruction to an alarm system, wherein the alarm system transmits the reminding instruction to a terminal connected with the alarm system, and the transmission instruction comprises the methane emission and the position range information of the rice field.
CN201910586844.1A 2019-07-01 2019-07-01 Method for determining methane emission in rice field Withdrawn CN112241818A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115240791A (en) * 2022-07-13 2022-10-25 北京市燃气集团有限责任公司 Gas plant station methane emission accounting method, device, equipment and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115240791A (en) * 2022-07-13 2022-10-25 北京市燃气集团有限责任公司 Gas plant station methane emission accounting method, device, equipment and storage medium

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