A water and fertilizer integrated intelligent control method and system for a corn field

Abstract

The present application relates to water and fertilizer integration control technical field, a kind of corn field's water and fertilizer integration intelligent control method and system, comprising: the target fertilization concentration corresponding to the target water and fertilizer diffusion section is identified, target fertilization concentration set is obtained, rainfall termination node and rainfall interval period are identified in suitable fertilization period, the current soil moisture content corresponding to rainfall termination node is identified, current fertilization concentration is identified according to current soil moisture content, obtain the fertilizer absorption curve of current soil moisture content under different soil fertilization amount, according to rainfall interval period, fertilizer absorption curve is calculated by absorption fertilizer interception, obtain fertilizer absorption set, the target soil fertilization amount corresponding to maximum fertilizer absorption is identified, and the drip irrigation fertilization of to-be-fertilized block is carried out according to current fertilization concentration and target soil fertilization amount.The present application can improve the fertilization efficiency in current water and fertilizer integration control process.

Description

Technical Field

[0001] This invention relates to the field of integrated water and fertilizer management technology, and in particular to an intelligent integrated water and fertilizer management method and system for cornfields. Background Technology

[0002] With the development of modern agricultural technology, integrated water and fertilizer drip irrigation technology has been widely used in corn planting. This technology combines drip irrigation with fertilization to achieve precise supply of water and nutrients, thereby improving corn yield and resource utilization efficiency.

[0003] However, existing integrated water and fertilizer drip irrigation technology still has shortcomings in dynamic regulation, especially in dealing with complex weather changes. It is difficult to adaptively adjust according to local rainfall, resulting in a mismatch between water and fertilizer supply and the actual needs of crops, which affects the growth and yield of maize. Therefore, current integrated water and fertilizer regulation methods suffer from low fertilization efficiency. Summary of the Invention

[0004] This invention provides a method and system for intelligent water and fertilizer integration regulation in cornfields, the main purpose of which is to improve the fertilization efficiency in the current water and fertilizer integration regulation process.

[0005] To achieve the above objectives, the present invention provides an intelligent water and fertilizer integration control method for cornfields, comprising: The optimal fertilizer concentration for corn fertilization nodes was obtained, and the optimal concentration of water and fertilizer was prepared according to the optimal fertilizer concentration. The optimal concentration of water and fertilizer was used to drip irrigate and fertilize the soil blocks of the preset control group and water and fertilizer diffusion sampling was carried out to obtain the control water and fertilizer diffusion cross section. The control group soil blocks refer to soil blocks with a water content of 0. Soil blocks of the test group are extracted sequentially from the pre-set test group soil block set. Drip irrigation and fertilization are carried out on the test group soil blocks according to the pre-set gradient concentration water and fertilizer set, and water and fertilizer diffusion sampling is carried out to obtain the test water and fertilizer diffusion cross section set. The test group soil block set refers to the set of soil blocks corresponding to soils with different water contents. The target water and fertilizer diffusion cross section that is most similar to the control water and fertilizer diffusion cross section is extracted from the experimental water and fertilizer diffusion cross section set. The target fertilizer concentration corresponding to the target water and fertilizer diffusion cross section is identified to obtain the target fertilizer concentration set. Among them, the target fertilizer concentration has a corresponding relationship with the soil blocks of the experimental group. A table of water content-fertilizer concentration relationship was constructed based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration. The appropriate fertilization period for corn is determined, and within the appropriate fertilization period, the rainfall termination point and rainfall interval are identified, and the current soil moisture content corresponding to the rainfall termination point is identified. Identify the current fertilizer concentration based on the current soil moisture content in the moisture content-fertilizer concentration relationship table; Based on the current fertilizer concentration, fertilizer absorption curves are obtained under different soil fertilization amounts at the current soil moisture content. The fertilizer absorption curves are then truncated and calculated according to the rainfall intervals to obtain a set of fertilizer absorption amounts. Identify the maximum fertilizer absorption rate within the fertilizer absorption rate cluster, and then identify the target soil fertilization rate corresponding to the maximum fertilizer absorption rate. Drip irrigation is applied to the fertilization area based on the current fertilizer concentration and target soil fertilizer application amount to achieve intelligent water and fertilizer integration control of the cornfield.

[0006] Optionally, the step of applying drip irrigation fertilizer to a pre-defined control group soil block using optimal concentration of water and fertilizer, and then sampling the water and fertilizer diffusion to obtain a control water and fertilizer diffusion cross section, includes: Obtain the soil node fertilization amount at the corn fertilization node; Based on the soil node fertilization amount and the optimal concentration of water and fertilizer, a diffusion sampling water and fertilizer solution was prepared. Using the aforementioned diffusion sampling water and fertilizer, drip irrigation and fertilization were carried out on the control group soil block according to the preset drip irrigation rate to obtain the control drip irrigation soil block; A cross-section of the control drip-irrigated soil block was obtained; An array of diffusion sampling sites was set on the cross-section of the control drip-irrigated soil according to a preset sampling interval; The water and fertilizer diffusion concentration of each diffusion sampling site in the diffusion sampling site array is collected to obtain a diffusion sampling concentration array. The water and fertilizer diffusion concentration refers to the total water and fertilizer diffusion of the diffusion sampling site in the corresponding spatial block of the control group drip irrigation soil block. Using a preset concentration-pixel conversion formula, the diffusion sampling concentration array is converted from concentration to pixel to obtain a diffusion sampling pixel array. The concentration-pixel conversion formula is as follows: in, This represents the pixel value of the i-th diffuse sampling pixel in the diffuse sampling pixel array. This indicates the preset maximum total amount of water and fertilizer diffusion. This represents the i-th diffusion sampling concentration in the i-th diffusion sampling concentration array; The control water and fertilizer diffusion cross section is fitted based on the diffusion sampling pixel array, wherein the control water and fertilizer diffusion cross section refers to the water and fertilizer diffusion concentration distribution map representing the control drip irrigation soil cross section.

[0007] Optionally, before sequentially extracting soil blocks from the pre-defined test group soil block set, the method further includes: Obtain a gradient rainfall set, and extract the gradient rainfall values ​​sequentially from the gradient rainfall set; Based on the gradient rainfall and the preset rainfall interval threshold, the rainfall interval is calculated using the following formula: in, This indicates the minimum rainfall within a given rainfall range. This represents the j-th gradient rainfall amount in the gradient rainfall set. Indicates the threshold of the rainfall range. Indicates the maximum rainfall within the rainfall area; Obtain historical rainfall records, and extract a set of rainfall events belonging to the rainfall range from the historical rainfall records; Identify the rainfall intensity corresponding to each rainfall event in the rainfall event set to obtain a rainfall intensity set, and calculate the average rainfall intensity based on the rainfall intensity set; Based on the gradient rainfall amount and average rainfall intensity, simulated rainfall tests were conducted on the soil blocks of the control group to obtain the soil block set of the experimental group.

[0008] Optionally, the step of extracting the target water-fertilizer diffusion cross section most similar to the control water-fertilizer diffusion cross section from the experimental water-fertilizer diffusion cross section includes: The experimental water and fertilizer diffusion sections were sequentially extracted from the experimental water and fertilizer diffusion section set. The diffusion cross sections of the experimental water and fertilizer and the control water and fertilizer were divided into diffusion blocks to obtain experimental diffusion block sets and control diffusion block sets. Identify the diffusion area of ​​the test water and fertilizer and the diffusion area of ​​the control water and fertilizer at the test water and fertilizer diffusion cross sections, respectively; Using a pre-constructed diffusion difference formula, the difference between the experimental water and fertilizer diffusion cross section and the control water and fertilizer diffusion cross section is calculated based on the experimental water and fertilizer diffusion area, the control water and fertilizer diffusion area, the experimental diffusion block set, and the control diffusion block set, thus obtaining the difference set. Extract the minimum difference from the set of differences, and identify the target water and fertilizer diffusion cross section corresponding to the minimum difference.

[0009] Optionally, the diffusion difference formula is as follows: in, This represents the degree of difference between the water-fertilizer diffusion cross section of the k-th experiment and the control water-fertilizer diffusion cross section. This represents the area weighting coefficient. Indicates the area of ​​water and fertilizer diffusion in the experiment. This indicates the area of ​​water and fertilizer diffusion in the control group. This represents the pixel weight coefficient of the first test diffusion block or control diffusion block in the test diffusion block set or control diffusion block set. This represents the total number of pixels in the first test diffusion block or control diffusion block within the test diffusion block set or control diffusion block set. This represents the pixel value of the x-th pixel in the first test diffusion block of the test diffusion block set. This represents the pixel value of the x-th pixel in the first control diffusion block of the control diffusion block set. Indicates the first in the set of experimental diffusion blocks or control diffusion blocks. Pixel weight coefficients for each experimental or control diffusion block. This represents the total number of pixels in the nth test diffusion block or control diffusion block within the test diffusion block set or control diffusion block set. This represents the pixel value of the x-th pixel in the n-th test diffusion block within the test diffusion block set. This represents the pixel value of the x-th pixel in the n-th control diffusion block of the control diffusion block set.

[0010] Optionally, identifying the rainfall termination point and rainfall interval within the suitable fertilization period includes: Obtain rainfall forecasts for the suitable fertilization period, identify rainfall termination times sequentially based on the rainfall forecasts, and use the rainfall termination times as rainfall termination nodes; The start time of the next rainfall is identified within the suitable fertilization period after the rainfall termination point, and the rainfall interval is calculated based on the rainfall termination time and the start time of the next rainfall.

[0011] Optionally, obtaining the fertilizer absorption curves under different soil fertilization rates based on the current soil moisture content according to the current fertilization concentration includes: Obtain the remaining fertilization amount for each corn fertilization node, and based on the remaining fertilization amount, set the soil fertilization amount set using the following formula: in, This represents the q-th soil fertilization amount concentrated in the soil fertilization process. This indicates the amount of fertilizer applied per unit of soil. Indicates the remaining amount of fertilizer applied to the node; The soil fertilization amount is extracted sequentially from the soil fertilization amount set, and the water and fertilizer to be absorbed is prepared according to the soil fertilization amount and the current fertilization concentration; The current soil block to be absorbed is set according to the current soil moisture content; The fertilizer absorption test is conducted on the soil block to be absorbed using the current water and fertilizer to be absorbed, and the test absorption soil block is obtained; The amount of fertilizer remaining in the test soil block is detected at preset time intervals to obtain a fertilizer remaining sequence. Calculate the fertilizer absorption sequence based on the fertilizer remaining amount sequence and the soil fertilization amount; Fertilizer absorption curves were fitted based on the fertilizer absorption sequence to obtain fertilizer absorption curves under different soil fertilization amounts.

[0012] Optionally, the step of calculating the fertilizer absorption amount by extracting fertilizer from the fertilizer absorption curve based on the rainfall interval to obtain the fertilizer absorption set includes: Based on the rainfall interval, an interval absorption curve is extracted from the fertilizer absorption curve, wherein the interval absorption curve refers to the absorption curve segment of the fertilizer absorption curve that belongs to the rainfall interval. Identify the terminal fertilizer absorption amount of the interval absorption curve to obtain a fertilizer absorption amount set, wherein the terminal fertilizer absorption amount refers to the fertilizer absorption amount corresponding to the end position of the interval absorption curve.

[0013] Optionally, after drip irrigation fertilization of the fertilized area according to the current fertilizer concentration and target soil fertilizer amount, the method further includes: Calculate the remaining fertilizer application amount at the calculation node and the target soil fertilizer application amount to calculate the current remaining fertilizer application amount; Determine whether the current remaining amount of fertilizer is greater than 0; If the current remaining amount of fertilizer is not greater than 0, then the intelligent control of water and fertilizer integration at the corn fertilization node is completed. If the current remaining fertilizer amount is greater than 0, then Determine whether there will be any rainfall events during the appropriate fertilization period; If a rainfall event occurs during the suitable fertilization period, the remaining fertilization amount of the node is updated using the current remaining fertilization amount, and the steps of obtaining the suitable fertilization period of the corn fertilization node are returned. If there is no rainfall during the suitable fertilization period, then artificial fertilization will be performed according to the current remaining amount of fertilizer.

[0014] To achieve the above objectives, the present invention also provides an intelligent water and fertilizer integrated control system for cornfields, comprising: A module for constructing a moisture content-fertilizer concentration relationship table is used to obtain the optimal fertilizer concentration for each fertilization node in maize. Based on this optimal concentration, the module configures the optimal water and fertilizer concentration. Using this optimal concentration, drip irrigation is applied to a pre-defined control group soil block, and water and fertilizer diffusion sampling is performed to obtain the control water and fertilizer diffusion cross-section. The control group soil block refers to the soil block with 0% moisture content. Experimental group soil blocks are sequentially extracted from a pre-defined set of experimental group soil blocks. Drip irrigation is applied to these experimental group soil blocks according to a pre-defined gradient concentration water and fertilizer set, and water and fertilizer diffusion sampling is performed to obtain the experimental water and fertilizer diffusion cross-section set. The experimental group soil block set refers to the set of soil blocks corresponding to different moisture contents. The module then extracts the target water and fertilizer diffusion cross-section most similar to the control water and fertilizer diffusion cross-section from the experimental water and fertilizer diffusion cross-section set, identifies the target fertilizer concentration corresponding to the target water and fertilizer diffusion cross-section, and obtains the target fertilizer concentration set. The target fertilizer concentration has a corresponding relationship with the experimental group soil blocks. A moisture content-fertilizer concentration relationship table is constructed based on this correspondence between the experimental group soil blocks and the target fertilizer concentration. The current fertilizer concentration identification module is used to obtain the appropriate fertilization period for corn fertilization nodes, identify the rainfall termination node and rainfall interval within the appropriate fertilization period, identify the current soil moisture content corresponding to the rainfall termination node, and identify the current fertilizer concentration based on the current soil moisture content in the moisture content-fertilizer concentration relationship table. The target soil fertilization amount identification module is used to obtain the fertilizer absorption curve of the current soil moisture content under different soil fertilization amounts based on the current fertilization concentration, and to perform fertilizer absorption truncation calculation on the fertilizer absorption curve according to the rainfall interval to obtain the fertilizer absorption amount set; the maximum fertilizer absorption amount is identified in the fertilizer absorption amount set, and the target soil fertilization amount corresponding to the maximum fertilizer absorption amount is identified. The drip irrigation fertilization module is used to apply fertilizer to the fertilized area based on the current fertilizer concentration and the target soil fertilization amount.

[0015] To address the above problems, the present invention also provides an electronic device, the electronic device comprising: A memory for storing at least one instruction; and a processor for executing the instructions stored in the memory to implement the aforementioned intelligent water and fertilizer integration control method for cornfields.

[0016] To address the aforementioned problems, the present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an electronic device to implement the aforementioned intelligent water and fertilizer integration control method for cornfields.

[0017] To address the problems described in the background art, this invention first requires determining the target fertilization concentration corresponding to soils with different moisture contents. Since rainfall may occur multiple times during suitable fertilization periods, it is necessary to determine the target soil fertilization amount for each rainfall interval. Once the target fertilization concentration and target soil fertilization amount are obtained, drip irrigation fertilization can be carried out on the fertilization area based on the current fertilization concentration and target soil fertilization amount. When obtaining the target fertilization concentration corresponding to soils with different moisture contents, it is necessary to first obtain the optimal fertilization concentration for the corn fertilization node, and then configure the optimal concentration based on the optimal fertilization concentration. Water and fertilizer were applied using drip irrigation to a pre-defined control group soil plot at the optimal concentration, and water and fertilizer diffusion sampling was performed to obtain a control water and fertilizer diffusion cross-section. Then, soil plots from the pre-defined experimental group soil plots were sequentially extracted, and drip irrigation was applied to these plots according to a pre-defined gradient concentration water and fertilizer set, with water and fertilizer diffusion sampling performed to obtain an experimental water and fertilizer diffusion cross-section set. To extract the experimental water and fertilizer diffusion cross-section that best approximates the fertilization effect of the target fertilization concentration, a target water and fertilizer diffusion cross-section most similar to the control water and fertilizer diffusion cross-section can be extracted from the experimental water and fertilizer diffusion cross-section set. Then, the target water and fertilizer diffusion cross-section is identified. The target fertilizer concentration set is obtained by determining the target fertilizer concentration corresponding to the fertilizer diffusion cross section. Finally, a water content-fertilizer concentration relationship table is constructed based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration. To obtain the target soil fertilizer amount, it is necessary to first obtain the suitable fertilization period for the maize fertilization node, and then identify the rainfall termination node and rainfall interval within the suitable fertilization period. The current soil water content is identified through the rainfall termination node. Since the water content-fertilizer concentration relationship table records the correspondence between soils with different water contents and the target fertilizer concentration, it is possible to determine the target fertilizer concentration based on the current soil water content. The current fertilizer concentration is identified in the fertilizer application rate-fertilizer concentration relationship table. To identify the target soil fertilization rate, fertilizer absorption curves under different soil fertilization rates can be obtained based on the current fertilizer concentration and soil moisture content. Then, based on rainfall intervals, the absorbed fertilizer is extracted from these curves to calculate the fertilizer absorption amount set. The maximum fertilizer absorption amount is identified within this set, and finally, the target soil fertilization rate corresponding to the maximum absorption amount is determined. Drip irrigation is then applied to the fertilized area based on the current fertilizer concentration and the target soil fertilization rate, thus completing the intelligent water and fertilizer integration regulation of the cornfield. Therefore, this invention can improve the fertilization efficiency in the current water and fertilizer integration regulation process. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating an intelligent water and fertilizer integration control method for cornfields according to an embodiment of the present invention. Figure 2 A functional module diagram of an integrated water and fertilizer intelligent control system for cornfields provided in an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of an electronic device for implementing the intelligent water and fertilizer integration control method for cornfields, according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 10. Electronic device; 11. Processor; 12. Memory; 13. Bus.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] This application provides a method for intelligent water and fertilizer management in cornfields. The executing entity of this method includes, but is not limited to, at least one electronic device that can be configured to execute the method provided in this application, such as a server or a terminal. In other words, the method can be executed by software or hardware installed on a terminal device or a server device, and the software may be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0023] Reference Figure 1 The diagram shown is a flowchart illustrating an intelligent water and fertilizer integration control method for cornfields according to an embodiment of the present invention. In this embodiment, the intelligent water and fertilizer integration control method for cornfields includes: S1. Obtain the optimal fertilizer concentration at the corn fertilization node, configure the optimal concentration of water and fertilizer according to the optimal fertilizer concentration, use the optimal concentration of water and fertilizer to drip fertilize the preset control group soil block and conduct water and fertilizer diffusion sampling to obtain the control water and fertilizer diffusion section.

[0024] Specifically, the control group soil block refers to a soil block with a moisture content of 0.

[0025] Understandably, the term "corn fertilization node" refers to specific fertilization points for corn, such as: basal fertilizer node, seedling fertilizer node, jointing fertilizer node, ear fertilizer node, etc. The term "optimal fertilizer concentration" refers to the optimal water and fertilizer concentration at the specified corn fertilization node. The optimal fertilizer concentration can be the optimal concentration for nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, etc. The term "optimal concentration water and fertilizer" refers to water and fertilizer prepared according to the optimal concentration. The term "control group soil block" refers to a soil block used as a blank control, and the soil block can be a 1 cubic meter soil block. The term "drip irrigation fertilization" refers to drip irrigation fertilization using drip irrigation pipes. The term "water and fertilizer diffusion sampling" refers to sampling the water and fertilizer diffusion concentration at various spatial locations within the soil block after drip irrigation fertilization. The term "control water and fertilizer diffusion cross-section" refers to a water and fertilizer concentration distribution map representing a vertical cross-section at the center of the control group soil block. This vertical cross-section passes through the midpoint of the soil surface layer of the soil block; when the soil block is a cube, the soil surface layer is a square.

[0026] In this embodiment of the invention, the step of applying drip irrigation fertilization to a pre-defined control group soil block using optimal concentration of water and fertilizer, and then sampling the water and fertilizer diffusion to obtain a control water and fertilizer diffusion cross-section, includes: Obtain the soil node fertilization amount at the corn fertilization node; Based on the soil node fertilization amount and the optimal concentration of water and fertilizer, a diffusion sampling water and fertilizer solution was prepared. Using the aforementioned diffusion sampling water and fertilizer, drip irrigation and fertilization were carried out on the control group soil block according to the preset drip irrigation rate to obtain the control drip irrigation soil block; A cross-section of the control drip-irrigated soil block was obtained; An array of diffusion sampling sites was set on the cross-section of the control drip-irrigated soil according to a preset sampling interval; The water and fertilizer diffusion concentration of each diffusion sampling site in the diffusion sampling site array is collected to obtain a diffusion sampling concentration array. The water and fertilizer diffusion concentration refers to the total water and fertilizer diffusion of the diffusion sampling site in the corresponding spatial block of the control group drip irrigation soil block. Using a preset concentration-pixel conversion formula, the diffusion sampling concentration array is converted from concentration to pixel to obtain a diffusion sampling pixel array. The concentration-pixel conversion formula is as follows: in, This represents the pixel value of the i-th diffuse sampling pixel in the diffuse sampling pixel array. This indicates the preset maximum total amount of water and fertilizer diffusion. This represents the i-th diffusion sampling concentration in the i-th diffusion sampling concentration array; The control water and fertilizer diffusion cross section is fitted based on the diffusion sampling pixel array, wherein the control water and fertilizer diffusion cross section refers to the water and fertilizer diffusion concentration distribution map representing the control drip irrigation soil cross section.

[0027] Understandably, the soil node fertilization amount refers to the amount of a certain type of fertilizer required at the corn fertilization node. The diffusion sampling water-fertilizer refers to a water-fertilizer solution with the optimal concentration and a total fertilizer content equal to the soil node fertilization amount. The drip irrigation rate can be 10 ml / min. The control drip-irrigated soil block refers to the control group soil block that has undergone drip irrigation fertilization. The sampling interval refers to the distance between sampling points on the control drip-irrigated soil cross-section, for example, 5 cm. The diffusion sampling site array refers to an array of sampling points on the control drip-irrigated soil cross-section at a distance equal to the sampling interval. The water-fertilizer diffusion concentration refers to the amount of fertilizer per unit volume corresponding to the diffusion sampling site. For example, when the sampling interval is 5 cm, the site spatial block (unit volume) is a cubic soil block centered on the diffusion sampling site. The diffusion sampling concentration array refers to an array composed of water-fertilizer diffusion concentrations. The diffusion sampling pixel array refers to an array composed of pixel values ​​corresponding to each water-fertilizer diffusion concentration. The water-fertilizer diffusion concentration distribution map refers to a distribution map representing the water-fertilizer concentration at various locations in the control drip-irrigated soil cross-section, fitted based on the diffusion sampling pixel array.

[0028] S2. Extract soil blocks from the pre-set experimental group soil blocks sequentially, apply drip irrigation and fertilizer to the soil blocks according to the pre-set gradient concentration water and fertilizer set, and perform water and fertilizer diffusion sampling to obtain the experimental water and fertilizer diffusion cross-section set.

[0029] In detail, the experimental group soil block set refers to the set of soil blocks corresponding to soils with different moisture contents.

[0030] Furthermore, the experimental soil blocks refer to soil blocks used for water and fertilizer diffusion experiments on soils with different moisture contents. The gradient concentration water and fertilizer set refers to a set of water and fertilizer concentrations at different application rates. For example, when the corn fertilization node is a basal fertilizer node and the fertilizer type is nitrogen fertilizer, the gradient concentration water and fertilizer set can be 1 g / L, 2 g / L, 3 g / L, etc. The experimental water and fertilizer diffusion cross-section set refers to the set of water and fertilizer concentration distribution maps of the vertical cross-section at the middle position of the experimental soil blocks under drip irrigation fertilization experiments with different gradient concentrations of water and fertilizer.

[0031] In this embodiment of the invention, before sequentially extracting soil blocks from the pre-defined test group soil blocks, the method further includes: Obtain a gradient rainfall set, and extract the gradient rainfall values ​​sequentially from the gradient rainfall set; Based on the gradient rainfall and the preset rainfall interval threshold, the rainfall interval is calculated using the following formula: in, This indicates the minimum rainfall within a given rainfall range. This represents the j-th gradient rainfall amount in the gradient rainfall set. Indicates the threshold of the rainfall range. Indicates the maximum rainfall within the rainfall area; Obtain historical rainfall records, and extract a set of rainfall events belonging to the rainfall range from the historical rainfall records; Identify the rainfall intensity corresponding to each rainfall event in the rainfall event set to obtain a rainfall intensity set, and calculate the average rainfall intensity based on the rainfall intensity set; Based on the gradient rainfall amount and average rainfall intensity, simulated rainfall tests were conducted on the soil blocks of the control group to obtain the soil block set of the experimental group.

[0032] Understandably, the gradient rainfall set refers to a collection of rainfall at different gradients. The rainfall interval threshold can be 0.4 mm.

[0033] S3. Extract the target water and fertilizer diffusion cross section that is most similar to the control water and fertilizer diffusion cross section from the experimental water and fertilizer diffusion cross section set, identify the target fertilizer concentration corresponding to the target water and fertilizer diffusion cross section, and obtain the target fertilizer concentration set.

[0034] In detail, the target fertilizer concentration corresponds to the soil blocks in the experimental group.

[0035] Understandably, the target water and fertilizer diffusion cross section refers to the experimental water and fertilizer diffusion cross section most similar to the control water and fertilizer diffusion cross section. The target fertilizer concentration refers to the fertilizer concentration of the gradient concentration water and fertilizer corresponding to the target water and fertilizer diffusion cross section. The target fertilizer concentration set refers to the set of target fertilizer concentrations corresponding to the soil blocks of each experimental group.

[0036] In this embodiment of the invention, the step of extracting the target water-fertilizer diffusion cross section most similar to the control water-fertilizer diffusion cross section from the experimental water-fertilizer diffusion cross section includes: The experimental water and fertilizer diffusion sections were sequentially extracted from the experimental water and fertilizer diffusion section set. The diffusion cross sections of the experimental water and fertilizer and the control water and fertilizer were divided into diffusion blocks to obtain experimental diffusion block sets and control diffusion block sets. Identify the diffusion area of ​​the test water and fertilizer and the diffusion area of ​​the control water and fertilizer at the test water and fertilizer diffusion cross sections, respectively; Using a pre-constructed diffusion difference formula, the difference between the experimental water and fertilizer diffusion cross section and the control water and fertilizer diffusion cross section is calculated based on the experimental water and fertilizer diffusion area, the control water and fertilizer diffusion area, the experimental diffusion block set, and the control diffusion block set, thus obtaining the difference set. Extract the minimum difference from the set of differences, and identify the target water and fertilizer diffusion cross section corresponding to the minimum difference.

[0037] Furthermore, the diffusion difference formula is as follows: in, This represents the degree of difference between the water-fertilizer diffusion cross section of the k-th experiment and the control water-fertilizer diffusion cross section. This represents the area weighting coefficient. Indicates the area of ​​water and fertilizer diffusion in the experiment. This indicates the area of ​​water and fertilizer diffusion in the control group. This represents the pixel weight coefficient of the first test diffusion block or control diffusion block in the test diffusion block set or control diffusion block set. This represents the total number of pixels in the first test diffusion block or control diffusion block within the test diffusion block set or control diffusion block set. This represents the pixel value of the x-th pixel in the first test diffusion block of the test diffusion block set. This represents the pixel value of the x-th pixel in the first control diffusion block of the control diffusion block set. Indicates the first in the set of experimental diffusion blocks or control diffusion blocks. Pixel weight coefficients for each experimental or control diffusion block. This represents the total number of pixels in the nth test diffusion block or control diffusion block within the test diffusion block set or control diffusion block set. This represents the pixel value of the x-th pixel in the n-th test diffusion block within the test diffusion block set. This represents the pixel value of the x-th pixel in the n-th control diffusion block of the control diffusion block set.

[0038] Furthermore, the experimental diffusion block set refers to the set of experimental diffusion regions after the experimental water and fertilizer diffusion cross section has been divided into diffusion blocks, and the control diffusion block set refers to the set of control diffusion regions after the control water and fertilizer diffusion cross section has been divided into diffusion blocks. For example, when the experimental water and fertilizer diffusion cross section is a square and the coordinates of its four vertices are (0, 0), (0, 6), (6, 6), and (6, 0), the area enclosed by the four points (2, 2), (4, 2), (2, 0), and (4, 0) on the experimental water and fertilizer diffusion cross section can be used as the first diffusion block. Then, the first diffusion block can be removed from the area enclosed by the four points (1, 4), (5, 4), (1, 0), and (5, 0) to obtain the second diffusion block. Finally, the first and second diffusion blocks can be removed from the control water and fertilizer diffusion cross section, and the remaining blocks can be used as the third diffusion block. The division method of the control diffusion block set is similar and will not be repeated here.

[0039] Understandably, the experimental water-fertilizer diffusion area refers to the area of ​​the experimental water-fertilizer diffusion cross section, and the control water-fertilizer diffusion area refers to the area of ​​the control water-fertilizer diffusion cross section. The difference degree refers to the degree of difference between the water-fertilizer diffusion cross section of the experimental water-fertilizer and the control water-fertilizer diffusion cross section. The difference degree set refers to the set of differences corresponding to each experimental water-fertilizer diffusion cross section.

[0040] Furthermore, the x-th pixel of the first test diffusion block in the test diffusion block set is at the same position as the x-th pixel of the first control diffusion block in the control diffusion block set. For example, they are the pixel positions in the first row and tenth column of the test water-fertilizer diffusion cross-section and the control water-fertilizer diffusion cross-section, respectively. Similarly, the x-th pixel of the second test diffusion block in the test diffusion block set is also at the same position as the x-th pixel of the second control diffusion block in the control diffusion block set.

[0041] S4. Construct a water content-fertilizer concentration relationship table based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration.

[0042] Understandably, the moisture content-fertilizer concentration relationship table refers to a table showing the relationship between soil moisture content and target fertilizer concentration in the soil blocks of the experimental group, where the target fertilizer concentration is the optimal fertilizer concentration for the corresponding soil block of the experimental group.

[0043] S5. Obtain the appropriate fertilization period for corn fertilization nodes, identify the rainfall termination node and rainfall interval within the appropriate fertilization period, and identify the current soil moisture content corresponding to the rainfall termination node.

[0044] Understandably, the suitable fertilization period refers to the fertilization time period appropriate for the corn fertilization node. For example, when the corn fertilization node is the basal fertilizer node, the suitable fertilization period can be from March 15th to April 10th. The rainfall termination node refers to the end time of rainfall within the suitable fertilization period, and the rainfall interval period refers to the interval between the rainfall termination node and the next rainfall within the suitable fertilization period. The current soil moisture content refers to the soil moisture content corresponding to the rainfall termination node.

[0045] In this embodiment of the invention, identifying the rainfall termination point and rainfall interval within the suitable fertilization period includes: Obtain rainfall forecasts for the suitable fertilization period, identify rainfall termination times sequentially based on the rainfall forecasts, and use the rainfall termination times as rainfall termination nodes; The start time of the next rainfall is identified within the suitable fertilization period after the rainfall termination point, and the rainfall interval is calculated based on the rainfall termination time and the start time of the next rainfall.

[0046] S6. Identify the current fertilizer concentration in the moisture content-fertilizer concentration relationship table based on the current soil moisture content.

[0047] Understandably, since the moisture content-fertilizer concentration relationship table can represent the correspondence between soil moisture content and target fertilizer concentration in the soil blocks of the experimental group, the corresponding target fertilizer concentration can be indexed in the moisture content-fertilizer concentration relationship table according to the current soil moisture content, and the corresponding target fertilizer concentration can be used as the current fertilizer concentration.

[0048] S7. Obtain fertilizer absorption curves under different soil fertilization amounts based on the current soil moisture content according to the current fertilization concentration. Calculate the fertilizer absorption amount by extracting the fertilizer from the fertilizer absorption curves based on the rainfall intervals.

[0049] Furthermore, the fertilizer absorption curve refers to the curve showing the change of fertilizer absorption by corn plants over time under the current soil moisture content, current fertilizer concentration, and different soil fertilizer application rates. The fertilizer absorption set refers to the set of fertilizer absorption by corn plants during the rainfall interval period in the fertilizer absorption curves under various soil fertilizer application rates.

[0050] In this embodiment of the invention, obtaining the fertilizer absorption curves under different soil fertilization amounts based on the current soil moisture content according to the current fertilization concentration includes: Obtain the remaining fertilization amount for each corn fertilization node, and based on the remaining fertilization amount, set the soil fertilization amount set using the following formula: in, This represents the q-th soil fertilization amount concentrated in the soil fertilization process. This indicates the amount of fertilizer applied per unit of soil. Indicates the remaining amount of fertilizer applied to the node; The soil fertilization amount is extracted sequentially from the soil fertilization amount set, and the water and fertilizer to be absorbed is prepared according to the soil fertilization amount and the current fertilization concentration; The current soil block to be absorbed is set according to the current soil moisture content; The fertilizer absorption test is conducted on the soil block to be absorbed using the current water and fertilizer to be absorbed, and the test absorption soil block is obtained; The amount of fertilizer remaining in the test soil block is detected at preset time intervals to obtain a fertilizer remaining sequence. Calculate the fertilizer absorption sequence based on the fertilizer remaining amount sequence and the soil fertilization amount; Fertilizer absorption curves were fitted based on the fertilizer absorption sequence to obtain fertilizer absorption curves under different soil fertilization amounts.

[0051] Understandably, the remaining fertilizer amount at a node refers to the amount of fertilizer still needed at the corn fertilization node. For example, if a 1 cubic meter soil block requires 30g of diammonium phosphate at the basal fertilizer node, and 10g has already been applied to that soil block at the basal fertilizer node, then the remaining fertilizer amount at that node is 20g. The unit soil fertilizer amount can be 2g, so the soil fertilizer amount set can be 2g, 4g, 6g, 8g, etc. The currently absorbable sap-fertilizer solution refers to the sap-fertilizer solution prepared according to the soil fertilizer amount and the current fertilizer concentration. The currently absorbable soil block refers to a soil block with the current soil moisture content. The test absorption soil block refers to the soil block where the fertilizer absorption test is conducted. The time interval can be 12 hours, so the time for detecting the remaining fertilizer amount can be 12 hours, 24 hours, 26 hours, etc., from the start of the test. The remaining fertilizer amount sequence refers to the sequence of remaining fertilizer amounts obtained from the remaining fertilizer amount detection.

[0052] Understandably, the fertilizer absorption sequence refers to the sequence of fertilizer absorbed by corn plants in the soil block during the fertilizer absorption test. The fertilizer absorption in the fertilizer absorption sequence is equal to the sequence of differences between the soil fertilization amount and the remaining fertilizer amount in each fertilizer residue sequence. For example, if the remaining fertilizer amount sequence is 9.8g, 9.6g, 9.3g, 9.2g, 9.1g, etc., and the soil fertilization amount is 10g, then the fertilizer absorption sequence is 0.2g, 0.3g, 0.1g, 0.1g.

[0053] In this embodiment of the invention, the step of calculating the fertilizer absorption amount by extracting fertilizer from the fertilizer absorption curve based on the rainfall interval to obtain the fertilizer absorption set includes: Based on the rainfall interval, an interval absorption curve is extracted from the fertilizer absorption curve, wherein the interval absorption curve refers to the absorption curve segment of the fertilizer absorption curve that belongs to the rainfall interval. Identify the terminal fertilizer absorption amount of the interval absorption curve to obtain a fertilizer absorption amount set, wherein the terminal fertilizer absorption amount refers to the fertilizer absorption amount corresponding to the end position of the interval absorption curve.

[0054] Understandably, when the endpoint of the interval absorption curve is 50h, the terminal fertilizer absorption amount is the fertilizer absorption amount corresponding to 50h on the fertilizer absorption curve.

[0055] S8. Identify the maximum fertilizer absorption in the fertilizer absorption concentration and identify the target soil fertilization amount corresponding to the maximum fertilizer absorption.

[0056] Furthermore, the target soil fertilization amount refers to the amount of soil fertilizer corresponding to the maximum fertilizer absorption amount.

[0057] S9. Based on the current fertilizer concentration and target soil fertilizer application amount, drip irrigation is applied to the fertilization area to complete the intelligent regulation of water and fertilizer integration in the cornfield.

[0058] In this embodiment of the invention, after drip irrigation fertilization of the fertilization area according to the current fertilizer concentration and the target soil fertilizer amount, the method further includes: Calculate the remaining fertilizer application amount at the calculation node and the target soil fertilizer application amount to calculate the current remaining fertilizer application amount; Determine whether the current remaining amount of fertilizer is greater than 0; If the current remaining amount of fertilizer is not greater than 0, then the intelligent control of water and fertilizer integration at the corn fertilization node is completed. If the current remaining fertilizer amount is greater than 0, then Determine whether there will be any rainfall events during the appropriate fertilization period; If a rainfall event occurs during the suitable fertilization period, the remaining fertilization amount of the node is updated using the current remaining fertilization amount, and the steps of obtaining the suitable fertilization period of the corn fertilization node are returned. If there is no rainfall during the suitable fertilization period, then artificial fertilization will be performed according to the current remaining amount of fertilizer.

[0059] Understandably, after fertilizing at the rainfall termination node based on the current fertilizer concentration and target soil fertilizer amount, it is necessary to determine whether the corn fertilization node has been completed. If the current remaining fertilizer amount is not greater than 0, it indicates that the corn fertilization node has been completed. If the current remaining fertilizer amount is greater than 0, it indicates that the corn fertilization node still needs to be fertilized. At this time, it is necessary to determine whether there will be more rainfall within the suitable fertilization period. If there will be more rainfall, the remaining fertilizer amount of the node is updated using the current remaining fertilizer amount, and the suitable fertilization period of the corn fertilization node is retrieved again. If there will be no more rainfall, artificial fertilization can be carried out directly according to the optimal fertilizer concentration and the current remaining fertilizer amount.

[0060] To address the problems described in the background art, this invention first requires determining the target fertilization concentration corresponding to soils with different moisture contents. Since rainfall may occur multiple times during suitable fertilization periods, it is necessary to determine the target soil fertilization amount for each rainfall interval. Once the target fertilization concentration and target soil fertilization amount are obtained, drip irrigation fertilization can be carried out on the fertilization area based on the current fertilization concentration and target soil fertilization amount. When obtaining the target fertilization concentration corresponding to soils with different moisture contents, it is necessary to first obtain the optimal fertilization concentration for the corn fertilization node, and then configure the optimal concentration based on the optimal fertilization concentration. Water and fertilizer were applied using drip irrigation to a pre-defined control group soil plot at the optimal concentration, and water and fertilizer diffusion sampling was performed to obtain a control water and fertilizer diffusion cross-section. Then, soil plots from the pre-defined experimental group soil plots were sequentially extracted, and drip irrigation was applied to these plots according to a pre-defined gradient concentration water and fertilizer set, with water and fertilizer diffusion sampling performed to obtain an experimental water and fertilizer diffusion cross-section set. To extract the experimental water and fertilizer diffusion cross-section that best approximates the fertilization effect of the target fertilization concentration, a target water and fertilizer diffusion cross-section most similar to the control water and fertilizer diffusion cross-section can be extracted from the experimental water and fertilizer diffusion cross-section set. Then, the target water and fertilizer diffusion cross-section is identified. The target fertilizer concentration set is obtained by determining the target fertilizer concentration corresponding to the fertilizer diffusion cross section. Finally, a water content-fertilizer concentration relationship table is constructed based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration. To obtain the target soil fertilizer amount, it is necessary to first obtain the suitable fertilization period for the maize fertilization node, and then identify the rainfall termination node and rainfall interval within the suitable fertilization period. The current soil water content is identified through the rainfall termination node. Since the water content-fertilizer concentration relationship table records the correspondence between soils with different water contents and the target fertilizer concentration, it is possible to determine the target fertilizer concentration based on the current soil water content. The current fertilizer concentration is identified in the fertilizer application rate-fertilizer concentration relationship table. To identify the target soil fertilization rate, fertilizer absorption curves under different soil fertilization rates can be obtained based on the current fertilizer concentration and soil moisture content. Then, based on rainfall intervals, the absorbed fertilizer is extracted from these curves to calculate the fertilizer absorption amount set. The maximum fertilizer absorption amount is identified within this set, and finally, the target soil fertilization rate corresponding to the maximum absorption amount is determined. Drip irrigation is then applied to the fertilized area based on the current fertilizer concentration and the target soil fertilization rate, thus completing the intelligent water and fertilizer integration regulation of the cornfield. Therefore, this invention can improve the fertilization efficiency in the current water and fertilizer integration regulation process.

[0061] like Figure 2 The diagram shown is a functional block diagram of an integrated water and fertilizer intelligent control system for cornfields provided in an embodiment of the present invention.

[0062] The intelligent water and fertilizer integrated control system 100 for cornfields described in this invention can be installed in an electronic device. Depending on the functions implemented, the intelligent water and fertilizer integrated control system 100 for cornfields may include a moisture content-fertilizer concentration relationship table construction module 101, a current fertilizer concentration identification module 102, a target soil fertilizer application rate identification module 103, and a drip irrigation fertilization module 104. The module described in this invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and can perform a fixed function, and are stored in the memory of the electronic device.

[0063] The moisture content-fertilizer concentration relationship table construction module 101 is used to obtain the optimal fertilizer concentration for each corn fertilization node, configure the optimal concentration of water and fertilizer according to the optimal fertilizer concentration, and use the optimal concentration of water and fertilizer to drip irrigate and sample the diffusion of water and fertilizer in a preset control group soil block to obtain the control water and fertilizer diffusion cross section. The control group soil block refers to the soil block with a moisture content of 0. Experimental group soil blocks are sequentially extracted from a preset set of experimental group soil blocks. Drip irrigation and diffusion sampling are performed on the experimental group soil blocks according to a preset gradient concentration water and fertilizer set to obtain an experimental water and fertilizer diffusion cross section set. The experimental group soil block set refers to the set of soil blocks corresponding to different moisture contents. The target water and fertilizer diffusion cross section most similar to the control water and fertilizer diffusion cross section is extracted from the experimental water and fertilizer diffusion cross section set. The target fertilizer concentration corresponding to the target water and fertilizer diffusion cross section is identified to obtain a target fertilizer concentration set. The target fertilizer concentration has a corresponding relationship with the experimental group soil blocks. A moisture content-fertilizer concentration relationship table is constructed based on the correspondence between the experimental group soil blocks and the target fertilizer concentration. The current fertilizer concentration identification module 102 is used to obtain the appropriate fertilization period for corn fertilization nodes, identify the rainfall termination node and rainfall interval within the appropriate fertilization period, identify the current soil moisture content corresponding to the rainfall termination node, and identify the current fertilizer concentration in the moisture content-fertilizer concentration relationship table based on the current soil moisture content. The target soil fertilization amount identification module 103 is used to obtain the fertilizer absorption curve of the current soil moisture content under different soil fertilization amounts according to the current fertilization concentration, and to perform fertilizer absorption truncation calculation on the fertilizer absorption curve according to the rainfall interval to obtain the fertilizer absorption amount set; to identify the maximum fertilizer absorption amount in the fertilizer absorption amount set, and to identify the target soil fertilization amount corresponding to the maximum fertilizer absorption amount. The drip irrigation fertilization module 104 is used to perform drip irrigation fertilization on the fertilization area according to the current fertilization concentration and the target soil fertilization amount.

[0064] In detail, the modules in the integrated water and fertilizer intelligent control system 100 for cornfields described in this embodiment of the invention employ the same methods as described above during use. Figure 1The method used is the same as the intelligent water and fertilizer integration control method for cornfields described above, and can produce the same technical effects, so it will not be repeated here.

[0065] like Figure 3 The diagram shown is a schematic diagram of an electronic device for implementing an intelligent water and fertilizer integration control method for cornfields, according to an embodiment of the present invention.

[0066] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and capable of running on the processor 10, such as a program for an integrated water and fertilizer intelligent control method for cornfields.

[0067] The memory 11 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as the portable hard drive of the electronic device 1. In other embodiments, the memory 11 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device 1. Furthermore, the memory 11 includes both internal storage units and external storage devices of the electronic device 1. The memory 11 can be used not only to store application software and various types of data installed on the electronic device 1, such as the code of a smart water and fertilizer integration control method program for cornfields, but also to temporarily store data that has been output or will be output.

[0068] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., a smart water and fertilizer integration control method program for cornfields) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0069] The bus 12 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize the connection and communication between the memory 11 and at least one processor 10, etc.

[0070] Figure 3 Only electronic devices with components are shown; it will be understood by those skilled in the art that... Figure 3 The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0071] For example, although not shown, the electronic device 1 may also include a power supply (such as a battery) to power the various components. Preferably, the power supply can be logically connected to the at least one processor 10 through a power management device, thereby enabling functions such as charging management, discharging management, and power consumption management. The power supply may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0072] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), which is typically used to establish communication connections between the electronic device 1 and other electronic devices.

[0073] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device 1 and to display a visual user interface.

[0074] The intelligent water and fertilizer integration control method program for cornfields stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When run in the processor 10, it can achieve the following: The optimal fertilizer concentration for corn fertilization nodes was obtained, and the optimal concentration of water and fertilizer was prepared according to the optimal fertilizer concentration. The optimal concentration of water and fertilizer was used to drip irrigate and fertilize the soil blocks of the preset control group and water and fertilizer diffusion sampling was carried out to obtain the control water and fertilizer diffusion cross section. The control group soil blocks refer to soil blocks with a water content of 0. Soil blocks of the test group are extracted sequentially from the pre-set test group soil block set. Drip irrigation and fertilization are carried out on the test group soil blocks according to the pre-set gradient concentration water and fertilizer set, and water and fertilizer diffusion sampling is carried out to obtain the test water and fertilizer diffusion cross section set. The test group soil block set refers to the set of soil blocks corresponding to soils with different water contents. The target water and fertilizer diffusion cross section that is most similar to the control water and fertilizer diffusion cross section is extracted from the experimental water and fertilizer diffusion cross section set. The target fertilizer concentration corresponding to the target water and fertilizer diffusion cross section is identified to obtain the target fertilizer concentration set. Among them, the target fertilizer concentration has a corresponding relationship with the soil blocks of the experimental group. A table of water content-fertilizer concentration relationship was constructed based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration. The appropriate fertilization period for corn is determined, and within the appropriate fertilization period, the rainfall termination point and rainfall interval are identified, and the current soil moisture content corresponding to the rainfall termination point is identified. Identify the current fertilizer concentration based on the current soil moisture content in the moisture content-fertilizer concentration relationship table; Based on the current fertilizer concentration, fertilizer absorption curves are obtained under different soil fertilization amounts at the current soil moisture content. The fertilizer absorption curves are then truncated and calculated according to the rainfall intervals to obtain a set of fertilizer absorption amounts. Identify the maximum fertilizer absorption rate within the fertilizer absorption rate cluster, and then identify the target soil fertilization rate corresponding to the maximum fertilizer absorption rate. Drip irrigation is applied to the fertilization area based on the current fertilizer concentration and target soil fertilizer application amount to achieve intelligent water and fertilizer integration control of the cornfield.

[0075] Specifically, the processor 10's implementation method for the above instructions can be found in [reference needed]. Figures 1 to 3 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0076] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0077] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor of an electronic device, can perform the following: The optimal fertilizer concentration for corn fertilization nodes was obtained, and the optimal concentration of water and fertilizer was prepared according to the optimal fertilizer concentration. The optimal concentration of water and fertilizer was used to drip irrigate and fertilize the soil blocks of the preset control group and water and fertilizer diffusion sampling was carried out to obtain the control water and fertilizer diffusion cross section. The control group soil blocks refer to soil blocks with a water content of 0. Soil blocks of the test group are extracted sequentially from the pre-set test group soil block set. Drip irrigation and fertilization are carried out on the test group soil blocks according to the pre-set gradient concentration water and fertilizer set, and water and fertilizer diffusion sampling is carried out to obtain the test water and fertilizer diffusion cross section set. The test group soil block set refers to the set of soil blocks corresponding to soils with different water contents. The target water and fertilizer diffusion cross section that is most similar to the control water and fertilizer diffusion cross section is extracted from the experimental water and fertilizer diffusion cross section set. The target fertilizer concentration corresponding to the target water and fertilizer diffusion cross section is identified to obtain the target fertilizer concentration set. Among them, the target fertilizer concentration has a corresponding relationship with the soil blocks of the experimental group. A table of water content-fertilizer concentration relationship was constructed based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration. The appropriate fertilization period for corn is determined, and within the appropriate fertilization period, the rainfall termination point and rainfall interval are identified, and the current soil moisture content corresponding to the rainfall termination point is identified. Identify the current fertilizer concentration based on the current soil moisture content in the moisture content-fertilizer concentration relationship table; Based on the current fertilizer concentration, fertilizer absorption curves are obtained under different soil fertilization amounts at the current soil moisture content. The fertilizer absorption curves are then truncated and calculated according to the rainfall intervals to obtain a set of fertilizer absorption amounts. Identify the maximum fertilizer absorption rate within the fertilizer absorption rate cluster, and then identify the target soil fertilization rate corresponding to the maximum fertilizer absorption rate. Drip irrigation is applied to the fertilization area based on the current fertilizer concentration and target soil fertilizer application amount to achieve intelligent water and fertilizer integration control of the cornfield.

[0078] In the several embodiments provided by this invention, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and actual implementations may have other classification methods.

[0079] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0081] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for intelligent water and fertilizer integration regulation in cornfields, characterized in that, The method includes: The optimal concentration of water and fertilizer was prepared according to the preset optimal fertilization concentration. The optimal concentration of water and fertilizer was used to drip fertilize the preset control group soil block and water and fertilizer diffusion sampling was carried out to obtain the control water and fertilizer diffusion cross section. The control group soil block refers to the soil block with 0 water content. Soil blocks of the test group were extracted sequentially from the pre-set test group soil blocks. Drip irrigation and fertilization were carried out on the test group soil blocks according to the pre-set gradient concentration water and fertilizer set, and water and fertilizer diffusion sampling was carried out to obtain the test water and fertilizer diffusion cross section set. The target water and fertilizer diffusion cross section that is most similar to the control water and fertilizer diffusion cross section is extracted from the experimental water and fertilizer diffusion cross section set, and the target fertilizer concentration corresponding to the target water and fertilizer diffusion cross section is identified to obtain the target fertilizer concentration set; A table of water content-fertilizer concentration relationship was constructed based on the correspondence between soil blocks in the experimental group and the target fertilizer concentration. Identify the rainfall termination point and rainfall interval within the preset suitable fertilization period, and identify the current soil moisture content corresponding to the rainfall termination point; Identify the current fertilizer concentration based on the current soil moisture content in the moisture content-fertilizer concentration relationship table; Based on the current fertilizer concentration, fertilizer absorption curves are obtained under different soil fertilization amounts at the current soil moisture content. The fertilizer absorption curves are then truncated and calculated according to the rainfall interval to obtain the fertilizer absorption set. Identify the target soil fertilization amount corresponding to the maximum fertilizer absorption, and perform drip irrigation fertilization on the fertilization area according to the current fertilizer concentration and the target soil fertilization amount, thus completing the intelligent regulation of water and fertilizer integration in the cornfield.

2. The intelligent water and fertilizer integration control method for cornfields as described in claim 1, characterized in that, The process involves drip irrigation and fertilization of a pre-defined control group soil plot using optimal concentration of water and fertilizer, followed by water and fertilizer diffusion sampling to obtain a control water and fertilizer diffusion cross-section, including: Obtain the soil node fertilization amount at the corn fertilization node; Based on the soil node fertilization amount and the optimal concentration of water and fertilizer, a diffusion sampling water and fertilizer solution was prepared. Using the aforementioned diffusion sampling water and fertilizer, drip irrigation and fertilization were carried out on the control group soil block according to the preset drip irrigation rate to obtain the control drip irrigation soil block; A cross-section of the control drip-irrigated soil block was obtained; An array of diffusion sampling sites was set on the cross-section of the control drip-irrigated soil according to a preset sampling interval; The water and fertilizer diffusion concentration of each diffusion sampling site in the diffusion sampling site array is collected to obtain a diffusion sampling concentration array. The water and fertilizer diffusion concentration refers to the total water and fertilizer diffusion of the diffusion sampling site in the corresponding spatial block of the control group drip irrigation soil block. Using a preset concentration-pixel conversion formula, the diffusion sampling concentration array is converted from concentration to pixel to obtain a diffusion sampling pixel array. The concentration-pixel conversion formula is as follows: in, This represents the pixel value of the i-th diffuse sampling pixel in the diffuse sampling pixel array. This indicates the preset maximum total amount of water and fertilizer diffusion. This represents the i-th diffusion sampling concentration in the i-th diffusion sampling concentration array; The control water and fertilizer diffusion cross section is fitted based on the diffusion sampling pixel array, wherein the control water and fertilizer diffusion cross section refers to the water and fertilizer diffusion concentration distribution map representing the control drip irrigation soil cross section.

3. The intelligent water and fertilizer integration control method for cornfields as described in claim 2, characterized in that, Before sequentially extracting soil blocks from the pre-defined test group soil block set, the method further includes: Obtain a gradient rainfall set, and extract the gradient rainfall values ​​sequentially from the gradient rainfall set; Based on the gradient rainfall and the preset rainfall interval threshold, the rainfall interval is calculated using the following formula: in, This indicates the minimum rainfall within a given rainfall range. This represents the j-th gradient rainfall amount in the gradient rainfall set. Indicates the threshold of the rainfall range. Indicates the maximum rainfall within the rainfall area; Obtain historical rainfall records, and extract a set of rainfall events belonging to the rainfall range from the historical rainfall records; Identify the rainfall intensity corresponding to each rainfall event in the rainfall event set to obtain a rainfall intensity set, and calculate the average rainfall intensity based on the rainfall intensity set; Based on the gradient rainfall amount and average rainfall intensity, simulated rainfall tests were conducted on the soil blocks of the control group to obtain the soil block set of the experimental group.

4. The intelligent water and fertilizer integration control method for cornfields as described in claim 3, characterized in that, The extraction of the target water-fertilizer diffusion cross section most similar to the control water-fertilizer diffusion cross section from the experimental water-fertilizer diffusion cross section includes: The experimental water and fertilizer diffusion sections were sequentially extracted from the experimental water and fertilizer diffusion section set. The diffusion cross sections of the experimental water and fertilizer and the control water and fertilizer were divided into diffusion blocks to obtain experimental diffusion block sets and control diffusion block sets. Identify the diffusion area of ​​the test water and fertilizer and the diffusion area of ​​the control water and fertilizer at the test water and fertilizer diffusion cross sections, respectively; Using a pre-constructed diffusion difference formula, the difference between the experimental water and fertilizer diffusion cross section and the control water and fertilizer diffusion cross section is calculated based on the experimental water and fertilizer diffusion area, the control water and fertilizer diffusion area, the experimental diffusion block set, and the control diffusion block set, thus obtaining the difference set. Extract the minimum difference from the set of differences, and identify the target water and fertilizer diffusion cross section corresponding to the minimum difference.

5. The intelligent water and fertilizer integration control method for cornfields as described in claim 4, characterized in that, The diffusion difference formula is as follows: in, This represents the degree of difference between the water-fertilizer diffusion cross section of the k-th experiment and the control water-fertilizer diffusion cross section. This represents the area weighting coefficient. Indicates the area of ​​water and fertilizer diffusion in the experiment. This indicates the area of ​​water and fertilizer diffusion in the control group. This represents the pixel weight coefficient of the first test diffusion block or control diffusion block in the test diffusion block set or control diffusion block set. This represents the total number of pixels in the first test diffusion block or control diffusion block within the test diffusion block set or control diffusion block set. This represents the pixel value of the x-th pixel in the first test diffusion block of the test diffusion block set. This represents the pixel value of the x-th pixel in the first control diffusion block of the control diffusion block set. Indicates the first in the set of experimental diffusion blocks or control diffusion blocks. Pixel weight coefficients for each experimental or control diffusion block. This represents the total number of pixels in the nth test diffusion block or control diffusion block within the test diffusion block set or control diffusion block set. This represents the pixel value of the x-th pixel in the n-th test diffusion block within the test diffusion block set. This represents the pixel value of the x-th pixel in the n-th control diffusion block of the control diffusion block set.

6. The intelligent water and fertilizer integration control method for cornfields as described in claim 5, characterized in that, The process of identifying the rainfall termination point and rainfall interval within a preset suitable fertilization period includes: Obtain rainfall forecasts for the suitable fertilization period, identify rainfall termination times sequentially based on the rainfall forecasts, and use the rainfall termination times as rainfall termination nodes; The start time of the next rainfall is identified within the suitable fertilization period after the rainfall termination point, and the rainfall interval is calculated based on the rainfall termination time and the start time of the next rainfall.

7. The intelligent water and fertilizer integration control method for cornfields as described in claim 6, characterized in that, The process of obtaining fertilizer absorption curves based on the current soil moisture content under different soil fertilization rates according to the current fertilization concentration includes: Obtain the remaining fertilization amount for each corn fertilization node, and based on the remaining fertilization amount, set the soil fertilization amount set using the following formula: in, This represents the q-th soil fertilization amount concentrated in the soil fertilization process. This indicates the amount of fertilizer applied per unit of soil. Indicates the remaining amount of fertilizer applied to the node; The soil fertilization amount is extracted sequentially from the soil fertilization amount set, and the water and fertilizer to be absorbed is prepared according to the soil fertilization amount and the current fertilization concentration; The current soil block to be absorbed is set according to the current soil moisture content; The fertilizer absorption test is conducted on the soil block to be absorbed using the current water and fertilizer to be absorbed, and the test absorption soil block is obtained; The amount of fertilizer remaining in the test soil block is detected at preset time intervals to obtain a fertilizer remaining sequence. Calculate the fertilizer absorption sequence based on the fertilizer remaining amount sequence and the soil fertilization amount; Fertilizer absorption curves were fitted based on the fertilizer absorption sequence to obtain fertilizer absorption curves under different soil fertilization amounts.

8. The intelligent water and fertilizer integration control method for cornfields as described in claim 7, characterized in that, The step of calculating the fertilizer absorption amount by extracting fertilizer segments from the fertilizer absorption curve based on the rainfall intervals yields a set of fertilizer absorption amounts, including: Based on the rainfall interval, an interval absorption curve is extracted from the fertilizer absorption curve, wherein the interval absorption curve refers to the absorption curve segment of the fertilizer absorption curve that belongs to the rainfall interval. Identify the terminal fertilizer absorption amount of the interval absorption curve to obtain a fertilizer absorption amount set, wherein the terminal fertilizer absorption amount refers to the fertilizer absorption amount corresponding to the end position of the interval absorption curve.

9. The intelligent water and fertilizer integration control method for cornfields as described in claim 8, characterized in that, After drip irrigation fertilization is carried out on the fertilization area according to the current fertilizer concentration and the target soil fertilizer amount, the method further includes: Calculate the remaining fertilizer application amount at the calculation node and the target soil fertilizer application amount to calculate the current remaining fertilizer application amount; Determine whether the current remaining amount of fertilizer is greater than 0; If the current remaining amount of fertilizer is not greater than 0, then the intelligent control of water and fertilizer integration at the corn fertilization node is completed. If the current remaining fertilizer amount is greater than 0, then Determine whether there will be any rainfall events during the appropriate fertilization period; If a rainfall event occurs during the suitable fertilization period, the remaining fertilization amount of the node is updated using the current remaining fertilization amount, and the steps of obtaining the suitable fertilization period of the corn fertilization node are returned. If there is no rainfall during the suitable fertilization period, then artificial fertilization will be performed according to the current remaining amount of fertilizer.

10. A smart water and fertilizer integrated control system for cornfields, characterized in that, The system includes: The module for constructing a moisture content-fertilizer concentration relationship table is used to configure the optimal concentration of water and fertilizer according to a preset optimal fertilization concentration. This optimal concentration of water and fertilizer is then used to drip-irrigate and sample the diffusion of water and fertilizer in a preset control group soil block, resulting in a control water and fertilizer diffusion cross-section. The control group soil block refers to a soil block with a moisture content of 0. Next, soil blocks in the preset experimental group soil block set are sequentially extracted. Based on a preset gradient concentration water and fertilizer set, drip-irrigate and sample the diffusion of water and fertilizer in the experimental group soil blocks, resulting in an experimental water and fertilizer diffusion cross-section set. From this set, the target water and fertilizer diffusion cross-section is extracted that is most similar to the control water and fertilizer diffusion cross-section. The target fertilization concentration corresponding to the target water and fertilizer diffusion cross-section is identified, resulting in a target fertilization concentration set. Finally, a moisture content-fertilizer concentration relationship table is constructed based on the correspondence between the experimental group soil blocks and the target fertilization concentration. The current fertilizer concentration identification module is used to identify the rainfall termination point and rainfall interval within the preset suitable fertilization period, identify the current soil moisture content corresponding to the rainfall termination point, and identify the current fertilizer concentration in the moisture content-fertilizer concentration relationship table based on the current soil moisture content. The target soil fertilization amount identification module is used to obtain the fertilizer absorption curve of the current soil moisture content under different soil fertilization amounts based on the current fertilization concentration, calculate the absorbed fertilizer based on the fertilizer absorption curve according to the rainfall interval, and obtain the fertilizer absorption amount set; and identify the target soil fertilization amount corresponding to the maximum fertilizer absorption amount. The drip irrigation fertilization module is used to apply fertilizer to the fertilized area based on the current fertilizer concentration and the target soil fertilization amount.

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