Automatic water-saving precise irrigation system for paddy field

Abstract

The invention discloses an automatic water-saving precise irrigation system for a paddy field, and particularly relates to the technical field of water-saving irrigation, which comprises an automatic water-saving irrigation area division module, an automatic water-saving irrigation monitoring equipment setting module, an automatic water-saving irrigation data acquisition module, an automatic water-saving irrigation analysis decision module and an automatic water-saving irrigation control module, and an automatic water-saving irrigation man-machine interaction module. The automatic water-saving irrigation area division module is used for determining a paddy field in a jurisdiction area as a target area, and dividing the target area into a plurality of monitoring sub-areas which are sequentially marked as 1, 2, 3,..., n; according to the method, the paddy field in the target area is monitored, the water demand of each stage is analyzed according to different growth and development stages, it is ensured that the paddy obtains the needed water in the growth process, and waste of the water is avoided. The growth environment of the rice is optimized, and growth obstacles caused by too much or too little water are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water-saving irrigation, and in particular to an automatic water-saving precision irrigation system for rice fields. Background Art

[0002] Rice is one of the most important food crops for human beings, and China is one of the origins of rice. The growth period of rice is specifically divided into: seedling stage, tillering stage, jointing stage, booting stage, heading stage, flowering stage, filling stage, and maturity stage. Paddy fields are one of the environments for rice growth. Rice has a relatively large demand for water. The current rice irrigation method mainly relies on manual experience and feeling to judge the water demand of rice fields, and then irrigates through channels or irrigation equipment to provide the amount of water required for the growth and development stage of rice.

[0003] The traditional rice irrigation method is to flood the rice fields through channels or irrigation equipment, which not only wastes water resources and has low water utilization, but is also not conducive to the growth and development of rice roots, affecting the normal growth of crops. As global water resources become increasingly scarce, China, as a major agricultural country, has increased the cost of agricultural water use, which has increased the cost of rice cultivation. Therefore, water-saving precision irrigation and efficient use of water resources are particularly important.

[0004] Therefore, an automated water-saving precision irrigation system for rice fields is provided to solve the problems existing in the above-mentioned irrigation methods, thereby monitoring the water demand of the rice fields in real time, and automatically controlling the operation of the irrigation equipment according to the preset irrigation strategy to achieve precise irrigation, effectively reduce the water consumption during the growth of rice, alleviate the problem of water shortage, improve the efficiency of water resource utilization, and make the water more evenly distributed in the soil, which is conducive to the full absorption and utilization of rice. This can not only reduce the waste of water resources, but also improve the yield and quality of rice. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an automatic water-saving precision irrigation system for rice fields to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic water-saving precision irrigation system for rice fields, comprising an automatic water-saving irrigation area division module, an automatic water-saving irrigation monitoring equipment setting module, an automatic water-saving irrigation data acquisition module, an automatic water-saving irrigation analysis and decision module, an automatic water-saving irrigation control module, and an automatic water-saving irrigation human-computer interaction module;

[0007] The automatic water-saving irrigation area division module is used to determine the rice fields in the jurisdiction area as the target area, and divide the target area into a plurality of monitoring sub-areas, which are sequentially recorded as 1, 2, 3, ..., n;

[0008] The automatic water-saving irrigation monitoring equipment setting module is used to set up an image acquisition device on the paddy field soil above and below each monitoring sub-area of ​​the paddy field, respectively, place a soil moisture sensor, a water level sensor and a pH tester on the ridges in each monitoring sub-area, and transmit the monitored data to the automatic water-saving irrigation data acquisition module;

[0009] The automatic water-saving irrigation data acquisition module is used to collect data from the sub-areas, obtain various parameters that affect the amount of irrigation water for rice fields, and output the various parameters to the automatic water-saving irrigation analysis and decision-making module;

[0010] The automatic water-saving irrigation analysis and decision-making module includes an irrigation water analysis unit for different rice growth and development stages, a rice leaf state analysis unit, and a rice growth environment soil state calculation unit, which are respectively used to calculate the temperature parameters and sunshine duration parameters, leaf parameters, and soil water retention performance parameters of each rice growth and development stage, and output the corresponding calculations to the automatic water-saving irrigation control module;

[0011] The specific formula for obtaining water requirement parameters for rice at different growth and development stages in each monitoring sub-area in the automatic water-saving irrigation analysis and decision-making module is:

[0012] Where j represents the four stages of rice growth and development, k i j represents the rice water demand coefficient of the jth stage in the ith sub-region, N i j represents the water demand of the i-th sub-area at the j-th stage, T i j represents the sum of the average weather temperature in the jth period of the ith sub-region, (dt) i j represents the total sunshine duration of the jth stage in the ith sub-region, t2 represents the sunset time of each day, t1 represents the sunrise time of each day, E represents the field water requirement of crops during the whole growth period, T k represents the weather temperature at the kth point, k=1 is 2 a.m., k=2 is 8 a.m., k=3 is 12 noon, and k=4 is 8 p.m.;

[0013] The specific formula for obtaining rice leaf parameters in each monitoring sub-area in the automatic water-saving irrigation analysis and decision module is: Where e is the empirical constant, Y i j represents the rice leaf water requirement index at the jth stage in the ith monitoring sub-area, y j represents the chromaticity value of rice leaves corresponding to the jth stage, y 0 Indicates the leaf chromaticity value of rice under normal growth conditions, s0 Indicates the expanded area of ​​rice leaves when there is sufficient water, s j represents the expanded area of ​​rice leaves corresponding to the jth stage;

[0014] The specific formula for obtaining soil water retention performance parameters in each monitoring sub-area in the automatic water-saving irrigation analysis and decision-making module is: Where R i j represents the soil water retention performance index of the i-th monitoring sub-area at the j-th stage, γ represents the soil water retention performance influencing factor, (TS) j0 represents the soil temperature required for normal rice growth in the jth stage, (TS) j represents the actual soil temperature of rice growth at stage j, (PH) j0 Indicates the pH of the soil required for normal growth of rice at stage j, (PH) j represents the actual pH value of the rice growing soil at the jth stage, C j0 represents the soil moisture required for normal growth of rice in the jth stage, C j Indicates the actual soil moisture level of rice growth at the jth stage;

[0015] The automatic water-saving irrigation control module is used to comprehensively analyze the analysis and decision results obtained by the automatic water-saving irrigation analysis and decision module, automatically control the switch of the irrigation equipment according to the comprehensive analysis results, adjust the irrigation amount, including the design of the control circuit of the irrigation equipment and the alarm circuit, and send out an alarm signal when necessary, and transmit the alarm signal to the automatic water-saving irrigation human-computer interaction module;

[0016] The automated water-saving irrigation human-computer interaction module is used for rice field workers to check the irrigation status of each growth stage of the rice field according to the comprehensive analysis results and alarm information transmitted by the control module, remotely and manually control and adjust irrigation parameters, and notify field workers to control irrigation equipment on site when necessary.

[0017] Preferably, the various parameters that affect the amount of irrigation water for rice fields in the automatic water-saving irrigation data acquisition module include target area information, contact information of rice field staff, parameters of rice at each growth and development stage, rice image parameters, and soil state parameters. The parameters of rice at each growth and development stage obtain temperature parameters and sunshine duration parameters through the image information acquisition function; the rice image parameters are specifically the leaf chromaticity and leaf expansion area in the monitoring sub-area; the soil state parameters obtain the temperature, soil humidity and soil acidity of the rice field in the monitoring sub-area through the temperature sensor, humidity sensor and pH tester.

[0018] Preferably, the various growth and development stages of rice in the automated water-saving irrigation analysis and decision-making module are: transplanting greening stage, tillering stage, jointing and booting stage, and heading and maturity stage, and the growth and development stages are numbered in sequence: 1, 2, 3, 4.

[0019] Preferably, the calculation formula for the amount of irrigation water required for rice in each monitoring sub-area in the automatic water-saving irrigation analysis and decision module is as follows: Where E i j represents the amount of irrigation water required for rice in the jth stage of the ith monitoring sub-area, k c represents the rice growth coefficient, β2 represents the leaf water demand factor, β1 represents the soil irrigation coefficient, N i j represents the water demand of the i-th sub-region at the j-th stage, Y i j represents the rice leaf water requirement index at the jth stage in the ith monitoring sub-area, R i j represents the soil water retention performance index of the i-th monitoring sub-area at the j-th stage, (dn) i j represents the soil moisture leakage at the jth growth stage in the ith monitoring sub-area, B i j It represents the soil underground drainage volume in the jth growth and development stage of the ith monitoring sub-area.

[0020] Preferably, the comprehensive analysis result model in the automatic water-saving irrigation control module is: Where E j represents the comprehensive irrigation water required for rice in the target area at stage j, E i j It represents the amount of irrigation water required for rice in the i-th monitoring sub-area at the j-th stage.

[0021] Technical effects and advantages of the present invention:

[0022] 1. The present invention monitors the rice fields in the target area, analyzes the water requirements at different stages of growth and development, ensures that the rice gets the required water during the growth process, and avoids water waste. It optimizes the growth environment of rice and reduces growth disorders caused by too much or too little water. It helps the rice form healthy plants and panicles, improves the fruit setting rate and thousand-grain weight, and ultimately increases the yield. At the same time, due to the balanced supply of water and nutrients, the quality of rice will also be improved;

[0023] 2. The present invention monitors the rice fields in the target area, analyzes the current water demand of rice in the monitoring area according to the state of rice leaves, adjusts the irrigation water volume, avoids waste caused by excessive water, maintains an appropriate amount of water supply, improves the photosynthesis efficiency of rice leaves, prevents excessive transpiration of leaves, and further promotes the growth and development of rice;

[0024] 3. The present invention monitors the rice fields in the target area, analyzes the irrigation water volume of the soil in the rice growth environment in the monitoring area according to the soil status of the rice fields, and performs corresponding control to maintain the moisture balance in the soil, avoid excessive moisture or dryness of the soil, achieve water-saving and precise irrigation of the rice fields, promote the release and effective utilization of nutrients in the soil, provide a good soil environment for rice growth, and achieve the goals of rational use of water resources and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall process of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 As shown, the present invention provides an automated water-saving precision irrigation system for rice fields, including an automated water-saving irrigation area division module, an automated water-saving irrigation monitoring equipment setting module, an automated water-saving irrigation data acquisition module, an automated water-saving irrigation analysis and decision module, an automated water-saving irrigation control module, and an automated water-saving irrigation human-computer interaction module.

[0028] The automated water-saving irrigation area division module is connected to the automated water-saving irrigation monitoring equipment setting module, the automated water-saving irrigation data acquisition module is respectively connected to the automated water-saving irrigation analysis and decision-making module and the automated water-saving irrigation monitoring equipment setting module, the automated water-saving irrigation control module is respectively connected to the automated water-saving irrigation decision-making module and the automated water-saving irrigation human-computer interaction module, and the automated water-saving irrigation human-computer interaction module terminal is connected to the automated water-saving irrigation analysis and decision-making module.

[0029] The automatic water-saving irrigation area division module is used to determine the rice fields in the jurisdiction area as the target area, and divide the target area into a plurality of monitoring sub-areas, which are sequentially recorded as 1, 2, 3, ..., n;

[0030] What needs to be specifically explained in this embodiment is that the target monitoring area in this embodiment is divided into monitoring sub-areas according to equal areas, and the rice varieties and planting environments of the monitoring sub-areas are the same.

[0031] The automatic water-saving irrigation monitoring equipment setting module is used to set up an image acquisition device on the paddy field soil above and below each monitoring sub-area of ​​the paddy field, respectively, place a soil moisture sensor, a water level sensor and a pH tester on the ridges in each monitoring sub-area, and transmit the monitored data to the automatic water-saving irrigation data acquisition module;

[0032] The automatic water-saving irrigation data acquisition module is used to collect data from the sub-areas, obtain various parameters that affect the amount of irrigation water for rice fields, and output the various parameters to the automatic water-saving irrigation analysis and decision-making module;

[0033] In this embodiment, it is necessary to specifically explain that the various parameters that affect the amount of irrigation water for rice fields in the automatic water-saving irrigation data acquisition module include target area information, contact information of rice field staff, parameters of rice at various growth and development stages, rice image parameters, and soil state parameters. Among them, the parameters of rice at various growth and development stages obtain temperature parameters and sunshine duration parameters through the image information acquisition function; the rice image parameters are specifically the leaf chromaticity and leaf expansion area in the monitoring sub-area; the soil state parameters obtain the temperature, soil humidity and soil acidity of the rice field in the monitoring sub-area through the temperature sensor, humidity sensor and pH tester.

[0034] The automatic water-saving irrigation analysis and decision module includes an irrigation water analysis unit for different rice growth and development stages, a rice leaf state analysis unit, and a rice growth environment soil state calculation unit, which are respectively used to calculate the temperature parameters and sunshine duration parameters, leaf parameters, and soil water retention performance parameters of each rice growth and development stage, and output the corresponding calculations to the automatic water-saving irrigation control module. The decision analysis includes the following steps:

[0035] It should be specifically explained in this embodiment that the various growth and development stages of rice are: transplanting green stage, tillering stage, jointing and heading stage, and heading and maturity stage, and the growth and development stages are numbered as 1, 2, 3, 4 in sequence.

[0036] Step 1: The growth and development stage of rice is an important factor affecting its water requirement. The water requirements of different stages vary. The specific formula for obtaining water requirement parameters of rice in different growth and development stages in each monitoring sub-area in the automated water-saving irrigation analysis and decision module is:

[0037] Where j represents the four stages of rice growth and development, k i jrepresents the rice water demand coefficient of the jth stage in the ith sub-region, N i j represents the water demand of the i-th sub-area at the j-th stage, T i j represents the sum of the average weather temperature in the jth period of the ith sub-region, (dt) i j represents the total sunshine duration of the jth stage in the ith sub-region, t2 represents the sunset time of each day, t1 represents the sunrise time of each day, E represents the field water requirement of crops during the whole growth period, T k represents the weather temperature at the kth point, k=1 is 2 a.m., k=2 is 8 a.m., k=3 is 12 noon, and k=4 is 8 p.m.;

[0038] Step 2: The state of rice leaves is one of the important bases for judging its water requirement. By observing the color and extension of rice leaves, farmers can more accurately judge the water demand of rice and carry out reasonable irrigation. Healthy rice leaves should be green and full, and no additional irrigation is required. However, if the leaves turn yellow, dry or curl, it may be a sign of insufficient water, and timely irrigation is required. Secondly, the extension of the leaves can also reflect the water demand of rice. When the water supply is sufficient, the rice leaves will fully expand and show an upright posture. If the water supply is insufficient, the leaves may shrink or droop due to lack of water, and the irrigation amount needs to be increased. The specific formula for obtaining rice leaf parameters in each monitoring sub-area in the automated water-saving irrigation analysis and decision module is: Where e is the empirical constant, Y i j represents the rice leaf water requirement index at the jth stage in the ith monitoring sub-area, y j represents the chromaticity value of rice leaves corresponding to the jth stage, y 0 Indicates the leaf chromaticity value of rice under normal growth conditions, s 0 Indicates the expanded area of ​​rice leaves when there is sufficient water, s j represents the expanded area of ​​rice leaves corresponding to the jth stage;

[0039] Step 3: The water retention performance of the soil in the rice growing environment is poor, and more frequent irrigation is required; the soil has good water retention capacity, and the number of irrigation times can be reduced. The specific formula for obtaining soil water retention performance parameters in each monitoring sub-area in the automated water-saving irrigation analysis and decision module is:

[0040] Where R i j represents the soil water retention performance index of the i-th monitoring sub-area at the j-th stage, γ represents the soil water retention performance influencing factor, (TS) j0represents the soil temperature required for normal rice growth in the jth stage, (TS) j represents the actual soil temperature of rice growth at stage j, (PH) j0 Indicates the pH of the soil required for normal growth of rice at stage j, (PH) j represents the actual pH value of the rice growing soil at the jth stage, C j0 represents the soil moisture required for normal growth of rice in the jth stage, C j It indicates the actual soil moisture of rice growing in the jth stage. Generally, the soil moisture of rice in the target water-saving irrigation area is relatively high when the rice is in a normal growth state due to the presence of water. When the soil is short of water, the water in the soil is lost and the soil moisture decreases.

[0041] Step 4: Water-saving precision irrigation of rice fields is affected by the growth and development stage of rice, soil water retention performance, and leaf state parameters. The calculation formula for the amount of irrigation water required for rice in each monitoring sub-area at each stage in the automated water-saving irrigation analysis and decision module is as follows: Where E i j represents the amount of irrigation water required for rice in the jth stage of the ith monitoring sub-area, k c represents the rice growth coefficient, β2 represents the leaf water demand factor, β1 represents the soil irrigation coefficient, N i j represents the water demand of the i-th sub-region at the j-th stage, Y i j represents the rice leaf water requirement index at the jth stage in the ith monitoring sub-area, R i j represents the soil water retention performance index of the i-th monitoring sub-area at the j-th stage, (dn) i j represents the soil moisture leakage at the jth growth stage in the ith monitoring sub-area, B i j It represents the soil underground drainage volume in the jth growth and development stage of the ith monitoring sub-area;

[0042] The automatic water-saving irrigation control module is used to comprehensively analyze the analysis and decision results obtained by the automatic water-saving irrigation analysis and decision module, automatically control the switch of the irrigation equipment according to the comprehensive analysis results, adjust the irrigation amount, including the design of the control circuit of the irrigation equipment and the alarm circuit, and send out an alarm signal when necessary, and transmit the alarm signal to the automatic water-saving irrigation human-computer interaction module. The comprehensive analysis result model is: Where E j represents the comprehensive irrigation water required for rice in the target area at stage j, E i jrepresents the amount of irrigation water required for rice in the jth stage in the ith monitoring sub-area;

[0043] The automated water-saving irrigation human-computer interaction module is used for rice field workers to check the irrigation status of each growth stage of the rice field according to the comprehensive analysis results and alarm information transmitted by the control module, remotely and manually control and adjust irrigation parameters, and notify field workers to control irrigation equipment on site when necessary.

[0044] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0045] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The automatic water-saving precision irrigation system for rice fields is characterized by: It includes an automated water-saving irrigation area division module, an automated water-saving irrigation monitoring equipment setting module, an automated water-saving irrigation data acquisition module, an automated water-saving irrigation analysis and decision-making module, an automated water-saving irrigation control module, and an automated water-saving irrigation human-computer interaction module; The automatic water-saving irrigation area division module is used to determine the rice fields in the jurisdiction area as the target area, and divide the target area into a plurality of monitoring sub-areas, which are sequentially recorded as 1, 2, 3, ..., n; The automatic water-saving irrigation monitoring equipment setting module is used to set up an image acquisition device on the paddy field soil above and below each monitoring sub-area of ​​the paddy field, respectively, place a soil moisture sensor, a water level sensor and a pH tester on the ridges in each monitoring sub-area, and transmit the monitored data to the automatic water-saving irrigation data acquisition module; The automatic water-saving irrigation data acquisition module is used to collect data from the sub-areas, obtain various parameters that affect the amount of irrigation water for rice fields, and output the various parameters to the automatic water-saving irrigation analysis and decision-making module; The automatic water-saving irrigation analysis and decision-making module includes an irrigation water analysis unit for different rice growth and development stages, a rice leaf state analysis unit, and a rice growth environment soil state calculation unit, which are respectively used to calculate the temperature parameters and sunshine duration parameters, leaf parameters, and soil water retention performance parameters of each rice growth and development stage, and output the corresponding calculations to the automatic water-saving irrigation control module; The specific formula for obtaining water requirement parameters for rice at different growth and development stages in each monitoring sub-area in the automatic water-saving irrigation analysis and decision-making module is: Where j represents the four stages of rice growth and development, k i j represents the rice water demand coefficient of the jth stage in the ith sub-region, N i j represents the water demand of the i-th sub-area at the j-th stage, T i j represents the sum of the average weather temperature in the jth period of the ith sub-region, (dt) i j represents the total sunshine duration of the jth stage in the ith sub-region, t2 represents the sunset time of each day, t1 represents the sunrise time of each day, E represents the field water requirement of crops during the whole growth period, T k represents the weather temperature at the kth point, k=1 is 2 a.m., k=2 is 8 a.m., k=3 is 12 noon, and k=4 is 8 p.m.; The specific formula for obtaining rice leaf parameters in each monitoring sub-area in the automatic water-saving irrigation analysis and decision module is: Where e is the empirical constant, Y i j represents the rice leaf water requirement index at stage j in the ith monitoring sub-area, y j represents the chromaticity value of rice leaves corresponding to the jth stage, y 0 Indicates the leaf chromaticity value of rice under normal growth conditions, s 0 Indicates the expanded area of ​​rice leaves when there is sufficient water, s j represents the expanded area of ​​rice leaves corresponding to the jth stage; The specific formula for obtaining soil water retention performance parameters in each monitoring sub-area in the automatic water-saving irrigation analysis and decision-making module is: Where R i j represents the soil water retention performance index of the i-th monitoring sub-area at the j-th stage, γ represents the soil water retention performance influencing factor, (TS) j0 represents the soil temperature required for normal rice growth in the jth stage, (TS) j represents the actual soil temperature of rice growth at stage j, (PH) j0 Indicates the pH of the soil required for normal growth of rice at stage j, (PH) j represents the actual pH value of the rice growing soil at the jth stage, C j0 represents the soil moisture required for normal growth of rice in the jth stage, C j Indicates the actual soil moisture level of rice growth at the jth stage; The automatic water-saving irrigation control module is used to comprehensively analyze the analysis and decision results obtained by the automatic water-saving irrigation analysis and decision module, automatically control the switch of the irrigation equipment according to the comprehensive analysis results, adjust the irrigation amount, including the design of the control circuit of the irrigation equipment and the alarm circuit, and send out an alarm signal when necessary, and transmit the alarm signal to the automatic water-saving irrigation human-computer interaction module; The automated water-saving irrigation human-computer interaction module is used for rice field workers to check the irrigation status of each growth stage of the rice field according to the comprehensive analysis results and alarm information transmitted by the control module, remotely and manually control and adjust irrigation parameters, and notify field workers to control irrigation equipment on site when necessary.

2. The automatic water-saving precision irrigation system for rice fields according to claim 1 is characterized by: The various parameters that affect the amount of irrigation water in the rice field in the automatic water-saving irrigation data acquisition module include target area information, contact information of rice field staff, parameters of each growth and development stage of rice, rice image parameters, and soil state parameters. The parameters of each growth and development stage of rice are obtained through the image information acquisition function to obtain temperature parameters and sunshine duration parameters; the rice image parameters are specifically the leaf chromaticity and leaf expansion area in the monitoring sub-area; The soil state parameters are obtained through temperature sensors, humidity sensors, and pH testers to monitor the temperature, soil humidity, and soil acidity of the paddy fields in the sub-area.

3. The automatic water-saving precision irrigation system for rice fields according to claim 1 is characterized by: The various growth and development stages of rice in the automated water-saving irrigation analysis and decision-making module are: transplanting greening stage, tillering stage, jointing and heading stage, and heading maturity stage, and the growth and development stages are numbered in sequence: 1, 2, 3, 4.

4. The automatic water-saving precision irrigation system for rice fields according to claim 1 is characterized by: The calculation formula for the amount of irrigation water required for rice in each monitoring sub-area in the automatic water-saving irrigation analysis and decision-making module is as follows: Where E i j represents the amount of irrigation water required for rice in the jth stage of the ith monitoring sub-area, k c represents the rice growth coefficient, β2 represents the leaf water demand factor, β1 represents the soil irrigation coefficient, N i j represents the water demand of the i-th sub-region at the j-th stage, Y i j represents the rice leaf water requirement index at the jth stage in the ith monitoring sub-area, R i j represents the soil water retention performance index of the i-th monitoring sub-area at the j-th stage, (dn) i j represents the soil moisture leakage at the jth growth stage in the ith monitoring sub-area, B i j It represents the soil underground drainage volume in the jth growth and development stage of the ith monitoring sub-area.

5. The automatic water-saving precision irrigation system for rice fields according to claim 1 is characterized by: The comprehensive analysis result model in the automatic water-saving irrigation control module is: Where E j represents the comprehensive irrigation water required for rice in the target area at stage j, E i j It represents the amount of irrigation water required for rice in the i-th monitoring sub-area at the j-th stage.

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