Method and system for regulating and controlling crop nutrients in watershed and medium

Abstract

The invention discloses a crop nutrient regulation and control method and system in a watershed and a medium, and relates to the technical field of land resource data processing, and the method comprises the steps: carrying out the region division of a target watershed according to crop types, and obtaining crop space partitions, obtaining the nutrient demand quantity and the nutrient allowable input quantity of each distribution area of each crop in the crop space partition, calculating the nutrient input quantity of each distribution area of each crop, and when the nutrient demand quantity is smaller than or equal to the nutrient allowable input quantity, determining that the nutrient input quantity is equal to the nutrient demand quantity; and when the nutrient demand quantity is greater than the allowable nutrient input quantity, the nutrient input quantity is equal to the allowable nutrient input quantity. According to the method, accurate regulation and control of the nutrients in the specific distribution area of the specific crops are realized, the crop yield and the pollution emission reduction target requirement are considered at the same time, calculation of the nutrient input taking the crop yield and the pollution emission reduction target requirement into consideration is realized, and the accuracy of nutrient regulation and control is improved.

Description

Technical Field

[0001] The present application relates to the technical field of land resource data processing, and in particular to a method, system and medium for regulating crop nutrients in a watershed. Background Art

[0002] The results of the first and second national pollution source surveys show that the crop industry is an important source of water pollution. Reducing crop industry pollution is one of the main problems facing the ecological environment today, among which excessive nutrient application is the main cause of agricultural non-point source pollution. Therefore, determining a reasonable nutrient management method is an effective way to prevent and control crop industry pollution.

[0003] The current nutrient management methods are all based on nutrient management for the convenience of crop yields. They are regulated for the purpose of fully ensuring crop yields. There is a lack of nutrient regulation based on the water environment pollution level. The water environment pollution in the basin caused by excessive nutrient input is becoming more and more serious. The current nutrient regulation measures cannot meet the pollution reduction target requirements while ensuring crop production. In addition, the current nutrient regulation measures cannot accurately calculate the nutrient input for specific crops in specific areas, and the accuracy of nutrient regulation is low. Summary of the invention

[0004] The purpose of this application is to provide a method, system and medium for crop nutrient regulation in a watershed, which can realize the precise regulation of nutrients in a specific distribution area of ​​a specific crop, take into account the pollution reduction target requirements while considering the crop yield, realize the calculation of nutrient input that takes into account both crop yield and pollution reduction target requirements, and improve the accuracy of nutrient regulation.

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

[0006] In a first aspect, the present application provides a method for regulating crop nutrients in a watershed, the method comprising: dividing the target watershed into regions according to crop types to obtain crop space partitions; the crop space partitions include different distribution areas of different crops; obtaining the nutrient demand and allowable nutrient input of each distribution area of ​​each crop in the crop space partitions; calculating the nutrient input of each distribution area of ​​each crop, when the nutrient demand is less than or equal to the allowable nutrient input, the nutrient input is equal to the nutrient demand, and when the nutrient demand is greater than the allowable nutrient input, the nutrient input is equal to the allowable nutrient input; and regulating crop nutrients according to the nutrient input of each distribution area of ​​each crop.

[0007] In a second aspect, the present application provides a computer system comprising: 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 any of the above-mentioned methods for regulating crop nutrients in a watershed.

[0008] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for regulating crop nutrients in a watershed.

[0009] According to the specific embodiments provided in this application, this application discloses the following technical effects.

[0010] This application divides the target watershed into regions according to crop types to obtain crop space partitions, and obtains the nutrient demand and nutrient allowable input of each distribution area of ​​each crop in the crop space partitions, and calculates the nutrient input of each distribution area of ​​each crop. When the nutrient demand is less than or equal to the nutrient allowable input, the nutrient input is equal to the nutrient demand, and when the nutrient demand is greater than the nutrient allowable input, the nutrient input is equal to the nutrient allowable input. This application achieves precise regulation of nutrients in specific distribution areas of specific crops, while considering crop yields, it also takes into account pollution reduction target requirements, and achieves the calculation of nutrient input that takes into account both crop yields and pollution reduction target requirements, thereby improving the accuracy of nutrient regulation.

[0011] The present application realizes precise control of nutrients in a specific distribution area of ​​a specific crop, takes into account the pollution reduction target requirements while considering the crop yield, realizes the calculation of nutrient input that takes into account both the crop yield and the pollution reduction target requirements, and improves the accuracy of nutrient control. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic flow chart of a method for regulating crop nutrients in a watershed provided in an embodiment of the present application.

[0014] Figure 2 A schematic diagram of the structure of a computer system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Embodiment 1, as Figure 1 As shown, this embodiment provides a method for regulating nutrients of crops in a watershed, and the method for regulating nutrients of crops in a watershed includes the following steps.

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

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

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

[0021] In the specific implementation process, the spatial distribution of each crop in the target watershed is comprehensively considered to divide the 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 according to the water quality targets of the target water bodies determined in the planning documents.

[0022] S2. Obtaining the nutrient requirement and the allowable nutrient input of each distribution area of ​​each crop in the crop space partition, specifically including the following steps.

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

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

[0025] Furthermore, the calculation formula for the allowable nutrient emission of each crop in each distribution area is as follows:

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

[0027] In the formula, F ijis the allowable nutrient discharge of crop i in distribution area j (kg / ha), C is the nutrient concentration of the water quality of the target basin (mg / L), R ij is the nutrient entry coefficient of crop i in distribution area j (dimensionless), J ij is the crop drainage volume of crop i in distribution area j (mm). The nutrient entry coefficient of crop i in distribution area j is obtained according to literature analysis. The crop drainage volume is calculated according to regional rainfall and runoff coefficient, where rainfall is obtained from the local meteorological bureau and runoff coefficient is obtained from literature.

[0028] S23. Calculate the nutrient requirement of each crop in each distribution area based on the nutrient requirement of each crop in each distribution area and the crop target yield.

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

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

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

[0032] Optionally, the target crop yield of each crop in each distribution area is an average crop yield of each crop in each distribution area in recent three years.

[0033] S24. The allowable nutrient input amount of each crop in each distribution area is calculated based on the allowable nutrient discharge amount of each crop in each distribution area.

[0034] Furthermore, the calculation formula for the allowable nutrient input for each distribution area of ​​each crop is as follows.

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

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

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

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

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

[0040]

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

[0042] S4. Regulate crop nutrients based on the nutrient input of each crop in each distribution area.

[0043] This application achieves precise control of nutrients in a specific distribution area of ​​a specific crop, taking into account the pollution reduction target requirements while considering crop yield, and realizes the calculation of nutrient input that takes into account both crop yield and pollution reduction target requirements, thereby improving the accuracy of nutrient control. Based on the traditional method of determining nutrient input based on yield, this application takes into account environmental goals. At the same time, it considers the impact of nutrient input of crops in different spatial regions on the environment, determines the nutrient optimization management method for different regions and crops, and provides a scientific guidance method for the control of agricultural non-point source pollution.

[0044] Embodiment 2, the present application also provides a computer system, which may be a server or a terminal, and its internal structure diagram may be as follows: Figure 2As shown. The computer system includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer system is used to provide computing and control capabilities. The memory of the computer system includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer system is used to store video tag processing data. The input / output interface of the computer system is used to exchange information between the processor and an external device. The communication interface of the computer system is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for regulating crop nutrients in a watershed is implemented.

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

[0046] Embodiment 3: The present application also provides a computer-readable storage medium storing a computer program, which implements the above methods when executed by a processor.

[0047] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present 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 may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for regulating crop nutrients in a watershed, characterized in that: The method for regulating and controlling crop nutrients in the watershed comprises: Divide the target watershed into regions according to crop types to obtain crop space partitions; the crop space partitions include different distribution areas of different crops; Obtain the nutrient requirement and nutrient allowable input of each crop in each distribution area in the crop spatial division; Calculate the nutrient input of each crop in each distribution area. When the nutrient demand is less than or equal to the allowable nutrient input, the nutrient input is equal to the nutrient demand. When the nutrient demand is greater than the allowable nutrient input, the nutrient input is equal to the allowable nutrient input. Crop nutrient regulation is carried out according to the nutrient input of each crop in each distribution area.

2. The method for regulating crop nutrients in a watershed according to claim 1, characterized in that: The target watershed is divided into regions according to crop types to obtain crop spatial zoning, including: Geographic information system tools were used to couple the crop type distribution map and spatial distribution map of the target watershed to obtain the crop spatial zoning.

3. The method for regulating crop nutrients in a watershed according to claim 1, characterized in that: Obtain the nutrient requirement and nutrient allowable input of each crop in each distribution area in the crop spatial partition, including: Obtain crop drainage, nutrient requirements and crop target yield for each distribution area of ​​each crop; The allowable nutrient discharge of each crop in each distribution area is calculated based on the crop drainage of each crop in each distribution area; The nutrient requirement of each crop in each distribution area is calculated based on the nutrient requirement of each crop in each distribution area and the crop target yield; The allowable nutrient input for each crop in each distribution area is calculated based on the allowable nutrient discharge for each crop in each distribution area.

4. The method for regulating crop nutrients in a watershed according to claim 3, characterized in that: The calculation formula for the allowable nutrient discharge per distribution area of ​​each crop is as follows: F ij =C / R ij *J ij / 100; In the formula, F ij is the nutrient allowable discharge of crop i in distribution area j, C is the nutrient concentration of the water quality in the target basin, R ij is the nutrient entry coefficient of crop i in distribution area j, J ij is the crop drainage of distribution area j of crop i.

5. The method for regulating crop nutrients in a watershed according to claim 3, characterized in that: The nutrient requirement for each crop per distribution area is calculated as follows: D ij =Y ij *C ij / 1000; Where D ij is the nutrient requirement of crop i in distribution area j, Y ij is the target yield of crop i in distribution area j, C ij is the nutrient content in the grains of crop i in distribution area j.

6. The method for regulating crop nutrients in a watershed according to claim 3, characterized in that: 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 is the allowable nutrient input of crop i in distribution area j, F ij is the nutrient allowable emission of crop i in distribution area j, L ij is the nutrient loss coefficient of crop i in distribution area j.

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

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

9. A computer system comprising: 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 method for regulating crop nutrients in a watershed according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for regulating crop nutrients in a watershed described in any one of claims 1 to 8 is implemented.

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