A method, system and medium for regulating crop nutrients within a watershed

Abstract

This application discloses a method, system, and medium for crop nutrient regulation within a watershed, relating to the field of land resource data processing technology. The method includes: dividing the target watershed into regional zones according to crop type to obtain crop spatial partitions; acquiring the nutrient requirements and allowable nutrient inputs for each distribution area of ​​each crop within the spatial partitions; calculating the nutrient input for each distribution area of ​​each crop; and determining that when the nutrient requirements are less than or equal to the allowable nutrient inputs, the nutrient input equals the nutrient requirements; and when the nutrient requirements are greater than the allowable nutrient inputs, the nutrient input equals the allowable nutrient inputs. This application achieves precise nutrient regulation for specific distribution areas of specific crops, considering both crop yield and pollution reduction targets, thus improving the accuracy of nutrient regulation.

Description

Technical Field

[0001] This application relates to the field of land resource data processing technology, and in particular to a method, system and medium for regulating crop nutrients within a watershed. Background Technology

[0002] Water pollution is a serious problem in my country and a major environmental issue that urgently needs to be addressed. The results of the first and second national pollution source surveys show that agriculture is a significant source of water pollution, and reducing agricultural pollution is one of the major challenges facing the ecological environment field today. Excessive nutrient application is a primary cause of agricultural non-point source pollution. Therefore, determining reasonable nutrient management methods is an effective way to control agricultural pollution.

[0003] Current nutrient management methods are all based on the convenience of crop yield, and are regulation aimed at maximizing crop yield. They lack regulation of nutrients based on water pollution. However, water pollution caused by excessive nutrient input is becoming increasingly serious. Current nutrient regulation measures cannot meet pollution reduction targets while ensuring crop production. In addition, current nutrient regulation measures cannot accurately calculate the nutrient input for specific crops in specific regions, resulting in low accuracy of nutrient regulation. Summary of the Invention

[0004] The purpose of this application is to provide a method, system, and medium for crop nutrient regulation within a watershed, which enables precise regulation of nutrients in a specific distribution area of ​​a particular crop. It takes into account both crop yield and pollution reduction targets, and calculates nutrient input that balances crop yield and pollution reduction targets, thereby improving the accuracy of nutrient regulation.

[0005] To achieve the above objectives, this application provides the following solution:

[0006] Firstly, this application provides a method for regulating crop nutrients within a watershed. The method includes: dividing the target watershed into regional zones according to crop type to obtain crop spatial partitions; each crop spatial partition includes different distribution areas for different crops; obtaining the nutrient requirements and allowable nutrient inputs for each distribution area of ​​each crop within the crop spatial partitions; calculating the nutrient input for each distribution area of ​​each crop, where the nutrient input equals the nutrient requirements when the nutrient requirements are less than or equal to the allowable nutrient inputs, and the nutrient input equals the allowable nutrient inputs when the nutrient requirements are greater than the allowable nutrient inputs; and regulating crop nutrients based on the nutrient input for each distribution area of ​​each crop.

[0007] Secondly, this application provides a computer system, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the crop nutrient regulation method in the watershed described in any one of the above-mentioned methods.

[0008] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the crop nutrient regulation method in the watershed described above.

[0009] Based on the specific embodiments provided in this application, the following technical effects are disclosed.

[0010] This application divides the target watershed into regional zones based on crop type, obtaining crop spatial partitions. It then acquires the nutrient requirements and allowable nutrient inputs for each distribution area of ​​each crop within these partitions. The nutrient input for each distribution area of ​​each crop is calculated. When the nutrient requirement is less than or equal to the allowable nutrient input, the nutrient input equals the nutrient requirement; when the nutrient requirement exceeds the allowable nutrient input, the nutrient input equals the allowable nutrient input. This application achieves precise nutrient regulation for specific distribution areas of specific crops, considering both crop yield and pollution reduction targets. It realizes a nutrient input calculation that balances crop yield and pollution reduction targets, thus improving the accuracy of nutrient regulation.

[0011] This application enables precise regulation of nutrients in specific distribution areas of specific crops. It takes into account both crop yield and pollution reduction targets, and calculates nutrient input that balances crop yield and pollution reduction targets, thereby improving the accuracy of nutrient regulation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a flowchart illustrating a method for regulating crop nutrients within a watershed, as provided in an embodiment of this application.

[0014] Figure 2 This is a schematic diagram of the structure of a computer system provided in an embodiment of this application. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1, as Figure 1 As shown in the figure, this embodiment provides a method for regulating crop nutrients within a watershed, which includes the following steps.

[0018] S1. Divide the target watershed into regions according to crop type to obtain crop spatial partitions; the crop spatial partitions include different distribution areas of different crops.

[0019] Step S1 specifically includes: using geographic information system tools to couple the crop type distribution map and spatial distribution map of the target watershed to obtain crop spatial partitioning.

[0020] Furthermore, the nutrients include at least one or more of nitrogen and phosphorus.

[0021] In the specific implementation process, the spatial distribution of various crops within the target watershed is comprehensively considered to divide the area into crop spatial zones that take into account both crop type and spatial distribution. The concentration of nutrients (nitrogen and phosphorus) in the water quality of the target watershed is determined based on the water quality targets for the target water bodies specified in the planning documents.

[0022] S2. Obtain the nutrient requirements and allowable nutrient input for each distribution area of ​​each crop in the crop spatial partition, specifically including the following steps.

[0023] S21. Obtain crop drainage, nutrient requirements, and target crop yield for each distribution area of ​​each crop.

[0024] S22. Calculate the allowable nutrient discharge for each crop in each distribution area based on the crop drainage volume for each distribution area of ​​each crop.

[0025] Furthermore, the formula for calculating the allowable nutrient emissions for each crop in each distribution area is as follows:

[0026] F ij =C / R ij *J ij / 100.

[0027] In the formula, F ijLet C be the allowable nutrient discharge (kg / ha) in distribution area j of crop i, C be the nutrient concentration (mg / L) in the target watershed, and R be the nutrient concentration in the target watershed. ij J is the nutrient inflow coefficient (dimensionless) of crop i in distribution area j. ij Let represent the crop drainage volume (mm) in distribution area j of crop i. The nutrient inflow coefficient for distribution area j of crop i was obtained from literature analysis. Crop drainage volume was calculated based on regional rainfall and runoff coefficient, with rainfall data obtained from the local meteorological bureau and runoff coefficient obtained from literature.

[0028] S23. The nutrient requirements for each crop in each distribution area are calculated based on the nutrient content in the grains of each crop in each distribution area and the target yield of the crop.

[0029] Furthermore, the formula for calculating the nutrient requirements of each crop in each distribution area is as follows:

[0030] D ij =Y ij *C ij / 1000.

[0031] In the formula, D ij Y represents the nutrient requirement (kg / ha) of crop i in distribution area j. ij C represents the target yield (kg / ha) for distribution area j of crop i. ij The nutrient content (g / kg) in the grains of crop i in distribution area j.

[0032] Optionally, the target crop yield for each distribution area of ​​each crop is the average crop yield over the past three years for each distribution area of ​​each crop.

[0033] S24. Calculate the allowable nutrient input for each crop in each distribution area based on the allowable nutrient discharge for each crop in each distribution area.

[0034] Furthermore, the formula for calculating the allowable nutrient input for each crop in each distribution area is as follows.

[0035] A ij =F ij / L ij .

[0036] In the formula, A ij F represents the allowable nutrient input (kg / ha) in distribution area j of crop i. ij Let L be the allowable nutrient emissions (kg / ha) for distribution area j of crop i. ij Let be the nutrient loss coefficient (dimensionless) in the distribution area j of crop i.

[0037] Optionally, the nutrient loss coefficient is obtained based on the coefficient from the national pollution source census.

[0038] S3. Calculate the nutrient input for each crop in each distribution area. When the nutrient requirement is less than or equal to the allowable nutrient input, the nutrient input equals the nutrient requirement. When the nutrient requirement is greater than the allowable nutrient input, the nutrient input equals the allowable nutrient input.

[0039] Furthermore, the formula for calculating the nutrient input for each crop in each distribution area is as follows.

[0040] .

[0041] In the formula, E ij D represents the nutrient input in distribution area j of crop i. ij Let A be the nutrient requirement of crop i in distribution area j. ij Let be the allowable nutrient input in the distribution area j of crop i.

[0042] S4. Adjust crop nutrients according to the nutrient input of each crop in each distribution area.

[0043] This application achieves precise nutrient regulation for specific crops in specific distribution areas, taking into account both crop yield and pollution reduction targets. It calculates nutrient inputs that balance both crop yield and pollution reduction goals, improving the accuracy of nutrient regulation. Building upon the traditional method of determining nutrient input based on yield, this application also considers environmental objectives and the environmental impact of crop nutrient inputs in different spatial regions. It establishes a regional and crop-specific nutrient optimization management method, providing scientific guidance for agricultural non-point source pollution control.

[0044] Example 2: This application also provides a computer system, which can be a server or a terminal, and its internal structure diagram can be as follows. Figure 2As shown, the computer system includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operating system and computer programs stored in the non-volatile storage media. The database stores video tag processing data. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a method for regulating crop nutrients within a watershed.

[0045] Those skilled in the art will understand that Figure 2 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer system to which the present application is applied. A specific computer system may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0046] Example 3: This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods described above.

[0047] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for regulating crop nutrients within a watershed, characterized in that, The methods for regulating crop nutrients within the watershed include: The target watershed is divided into regions according to crop type to obtain crop spatial partitions; the crop spatial partitions include different distribution areas of different crops. Obtain the nutrient requirements and allowable nutrient inputs for each distribution area of ​​each crop in the crop spatial partition, specifically including: Obtain crop drainage, nutrient requirements, and target crop yield for each crop in each distribution area; The allowable nutrient discharge for each crop in each distribution area is calculated based on the crop drainage volume in each distribution area. The formula for calculating the allowable nutrient discharge for each crop in each distribution area is as follows: F ij =C / R ij *J ij / 100; In the formula, F ij Let C be the allowable nutrient discharge in the distribution area j of crop i, C be the nutrient concentration in the target watershed, and R be the allowable nutrient discharge. ij J is the nutrient inflow coefficient of crop i in distribution area j. ij Let i be the crop drainage volume in the distribution area j of crop i; The nutrient requirement for each crop in each distribution area is calculated based on the nutrient content of the grains and the target yield of each crop in each distribution area. The formula for calculating the nutrient requirement for each crop in each distribution area is as follows: D ij =Y ij *C ij / 1000; In the formula, D ij Y represents the nutrient requirement of crop i in distribution area j. ij C represents the target yield for crop i in distribution area j. ij The nutrient content in the grains of crop i in distribution area j; The allowable nutrient input for each crop in each distribution area is calculated based on the allowable nutrient emissions for each crop in each distribution area. The formula for calculating the allowable nutrient input for each crop in each distribution area is as follows: A ij =F ij / L ij ; In the formula, A ij F represents the allowable nutrient input in distribution area j of crop i. ij L represents the allowable nutrient emissions in distribution area j of crop i. ij Let be the nutrient loss coefficient in the distribution area j of crop i; Calculate the nutrient input for each crop in each distribution area. When the nutrient requirement is less than or equal to the allowable nutrient input, the nutrient input equals the nutrient requirement. When the nutrient requirement is greater than the allowable nutrient input, the nutrient input equals the allowable nutrient input. Crop nutrient regulation is carried out based on the nutrient input of each crop in each distribution area.

2. The method for regulating crop nutrients within a watershed according to claim 1, characterized in that, The target watershed is divided into regional zones based on crop type, resulting in crop spatial partitions, specifically including: Geographic Information System (GIS) tools were used to couple crop type distribution maps and spatial distribution maps of the target watershed to obtain crop spatial zoning.

3. The method for regulating crop nutrients within a watershed according to claim 1, characterized in that, The formula for calculating the nutrient input for each crop in each distribution area is as follows: ; In the formula, E ij D represents the nutrient input in distribution area j of crop i. ij Let A be the nutrient requirement of crop i in distribution area j. ij Let be the allowable nutrient input in the distribution area j of crop i.

4. The method for regulating crop nutrients within a watershed according to claim 1, characterized in that, The nutrients include at least one or more of nitrogen and phosphorus.

5. A computer system, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the watershed crop nutrient regulation method according to any one of claims 1-4.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the crop nutrient regulation method within the watershed as described in any one of claims 1-4.

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