Saline-alkali soil irrigation method, device, intelligent control system and saline-alkali soil treatment system

Abstract

The application relates to a saline-alkali soil irrigation method, device, intelligent control system and saline-alkali soil treatment system, and is applied to the field of agricultural planting irrigation in a salinization area. The method comprises the following steps: periodically acquiring soil information of a target irrigation area and a current month, wherein the soil information comprises soil water content and soil conductivity; according to the current month, accurate irrigation quantity and soil information threshold values which are in line with the characteristics of the current month are determined from preset irrigation information, wherein the soil information threshold values comprise a soil water content threshold value and a soil conductivity threshold value; when it is determined that irrigation needs to be performed according to the soil information and the soil information threshold values, the irrigation system is controlled to automatically realize water source irrigation according to the irrigation quantity, irrigation efficiency is improved, and the saline-alkali soil treatment effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of agricultural irrigation in a salinization area, and in particular to a saline-alkali soil irrigation method, device, intelligent control system and saline-alkali soil treatment system. BACKGROUND

[0002] With the growth of population, the demand for food will also increase accordingly. However, due to unreasonable farming and irrigation and drainage measures, the water-salt ratio in the soil is unreasonable, causing soil salinization, especially in the arid and water-deficient northwest region. Soil salinization in farmland is not conducive to crop planting, and the treatment of soil that has been salinized and the prevention of the aggravation of salinization are important means for the development of agriculture and the guarantee of food security.

[0003] At present, the salt content in saline-alkali soil is high, which can cause toxic effects on the root system of crops, resulting in the crops being unable to normally absorb water and nutrients, thereby affecting the growth and development of the crops. The buried pipe is a new type of saline-alkali soil treatment technology in recent years, which is mainly used for quickly removing excess water and salt in the soil to achieve the goal of salinization treatment. Although the current buried pipe measure has been applied in many regions, the irrigation mode still relies on traditional experience values for manual irrigation, which can achieve the purpose of rapid desalination, but the irrigation is not accurate, and targeted salinization treatment cannot be achieved, resulting in waste of water resources in the arid and water-deficient northwest region. SUMMARY

[0004] The application aims to provide a saline-alkali soil irrigation method, device, intelligent control system and saline-alkali soil treatment system, which can accurately irrigate and improve the irrigation efficiency while quickly removing the salt content in the soil to treat the saline-alkali soil.

[0005] In a first aspect, a saline-alkali soil irrigation method is provided, comprising:

[0006] Periodically acquiring soil information of a target irrigation area and a current month, wherein the soil information comprises soil water content and soil conductivity;

[0007] According to the current month, a corresponding irrigation amount and soil information threshold value are determined from the preset irrigation information, wherein the soil information threshold value comprises a soil water content threshold value and a soil conductivity threshold value;

[0008] According to the soil information and the soil information threshold value, it is determined whether irrigation is needed;

[0009] If irrigation is needed, the irrigation system is controlled to perform water source irrigation according to the irrigation amount.

[0010] By the technical scheme, the soil information of the target irrigation area and the current month are periodically acquired, the accurate irrigation amount and the soil information threshold value conforming to the characteristics of the current month are determined from the preset irrigation information according to the current month, the irrigation system is controlled to automatically realize water source irrigation according to the irrigation amount when it is determined that irrigation is needed according to the soil information and the soil information threshold value, and the irrigation efficiency and the water resource utilization rate are improved.

[0011] In a possible implementation manner, the soil layer of the target irrigation area is provided with a buried pipe drainage and salt removal system, which is used for draining water containing salt leached from the soil by irrigation or rainfall, and collecting the drainage through a water collecting pipeline to a water storage bay or a drainage ditch;

[0012] The saline-alkali soil irrigation method further includes:

[0013] The water quality salinity of the water storage bay is acquired.

[0014] It is determined whether the water quality salinity of the water storage bay is greater than a first water quality salinity threshold value, and if so, a water pumping station of the water storage bay is controlled to discharge the water of the water storage bay.

[0015] By the technical scheme, when the water quality salinity of the water storage bay is greater than the first water quality salinity threshold value, it indicates that the salt content of the water in the water storage bay exceeds the standard and cannot be used as a water source for crop irrigation, and at this time, the water of the water storage bay is discharged to provide space for the water storage bay to store the drainage again.

[0016] In a possible implementation manner, before the water quality salinity of the water storage bay is acquired, the method further includes:

[0017] The flow rate of the drainage is acquired.

[0018] When the flow rate of the drainage is greater than a preset flow rate threshold value, the water quality salinity of the drainage is acquired.

[0019] When the water quality salinity of the drainage is greater than a second water quality salinity threshold value, an electromagnetic valve at a water inlet of the water storage bay is closed to introduce the drainage into a drainage ditch through a drainage pipeline, and the water inlet of the water storage bay is a water inlet at the junction of the buried pipe drainage and salt removal system and the water storage bay.

[0020] By the technical scheme, the flow rate of the drainage is monitored, and when the flow rate of the drainage is greater than the preset flow rate threshold value and the water quality salinity of the drainage is greater than the second water quality salinity threshold value, if the drainage is stored in the water storage bay, the water quality salinity of the water storage bay will rapidly increase, and the drainage is introduced into the drainage ditch to avoid the drainage flowing into the water storage bay, thereby reducing the waste of water resources.

[0021] In a possible implementation manner, the soil information includes soil information of a plurality of sub-regions, and the plurality of sub-regions are sub-regions obtained by dividing the target irrigation area.

[0022] determining whether irrigation is needed according to the soil information and the soil information threshold value, comprises:

[0023] determining average soil information of the target irrigation area according to the soil information of the plurality of sub-areas; and determining whether irrigation is needed according to the average soil information and the soil information threshold value;

[0024] or,

[0025] for the soil information of each sub-area, determining demand information according to the soil information of each sub-area and the soil information threshold value; and determining whether irrigation is needed for the target irrigation area according to the demand information of each sub-area.

[0026] By the above technical solution, irrigation demand judgment is made by monitoring soil information at different positions, which can improve the accuracy of irrigation demand judgment.

[0027] In a possible implementation, if irrigation is needed, the method further comprises:

[0028] when a preset time length after irrigation according to the irrigation amount is reached, determining an expected value corresponding to post-irrigation soil information of the target irrigation area according to post-irrigation soil information of the plurality of sub-areas;

[0029] determining a variance according to the number of sub-areas of the plurality of sub-areas and the expected value of the target irrigation area;

[0030] when the variance is less than a preset variance threshold value, generating a first prompt, the first prompt being used to prompt a user to complete irrigation;

[0031] when the variance is not less than the preset variance threshold value, determining a plurality of target sub-areas from the plurality of sub-areas according to the post-irrigation soil information and the expected value of the plurality of sub-areas, the target sub-areas being sub-areas whose difference between the expected value and the post-irrigation soil information meets a preset condition; and generating a second prompt according to the plurality of target sub-areas, the second prompt being used to prompt the user that the plurality of target sub-areas need to be subjected to supplemental irrigation.

[0032] By the above technical solution, after irrigation is completed, the expected value and the variance are determined based on post-irrigation soil information of the plurality of sub-areas; when the variance is less than a preset variance threshold value, it indicates that the sub-areas are sufficiently irrigated; when the variance is not less than the preset variance threshold value, it indicates that some sub-areas are not sufficiently irrigated; then, the sub-areas corresponding to the information with large difference are selected as the sub-areas that are not sufficiently irrigated according to the post-irrigation soil information, and a prompt is given, so as to enable the user to carry out targeted supplemental irrigation, and ensure the water demand of crops.

[0033] In a possible implementation, after the second prompt is generated according to the target sub-regions, the method further includes:

[0034] For each target sub-region, a plurality of first sprinkling points corresponding to the target sub-region are determined according to the sub-regions corresponding to the respective sprinkling points.

[0035] A relationship table of the target sub-regions corresponding to each first sprinkling point and the number of sub-regions is constructed.

[0036] The target sprinkling point is determined according to the relationship table, the first sprinkling point with the maximum number of sub-regions is determined as the target sprinkling point, and the information of the first sprinkling point with the maximum number of sub-regions and the set sub-regions in the sub-regions corresponding to the other first sprinkling points in the relationship table are deleted, the set sub-regions being the sub-regions corresponding to the first sprinkling point with the maximum number of sub-regions.

[0037] The target sprinkling point is repeatedly determined until there is no target sub-region in the relationship table, and all target sprinkling points are obtained; and the sprinkling equipment corresponding to the target sprinkling points in the irrigation system is controlled to sprinkle the target sub-regions according to the target sprinkling points.

[0038] According to the technical solution, after the target sub-regions are determined to be supplemented, a plurality of first sprinkling points corresponding to each sub-region are determined, a relationship table of the target sub-regions corresponding to each first sprinkling point and the number of sub-regions is constructed, and the least number of sprinkling points, i.e., a plurality of target sprinkling points, capable of covering all target sub-regions are selected based on the relationship table, the sprinkling equipment corresponding to the target sprinkling points in the irrigation system is controlled to sprinkle the target sub-regions according to the target sprinkling points, and all regions needing to be supplemented are effectively covered by the least number of sprinkling equipment, thereby reducing the waste of water resources.

[0039] In a possible implementation, the water source includes a fresh water source and a brackish water source, and the irrigation system is controlled to be irrigated by the water source according to the irrigation amount, including:

[0040] The proportion of the fresh water source and the brackish water source is determined according to the current month.

[0041] The irrigation system is controlled to be irrigated by the water source based on the proportion and the irrigation amount.

[0042] According to the technical solution, the proportion of the fresh water source and the brackish water source is determined according to time, the brackish water resource is reasonably utilized for irrigation, the water resource utilization efficiency is improved, and the water recovery is realized under the condition that the crops grow normally.

[0043] In a second aspect, a saline-alkali soil irrigation device is provided, including:

[0044] An acquisition module is configured to periodically acquire soil information of a target irrigation area and a current month, wherein the soil information comprises soil water content and soil conductivity.

[0045] An information determination module is configured to determine, according to the current month, irrigation amount corresponding to the current month and soil information threshold from preset irrigation information, wherein the soil information threshold comprises soil water content threshold and soil conductivity threshold.

[0046] A watering demand determination module is configured to determine whether irrigation is needed according to the soil information and the soil information threshold; and a watering module is configured to control the irrigation system to perform water source irrigation according to the irrigation amount if irrigation is needed.

[0047] In a third aspect, a smart control system is provided, which comprises:

[0048] one or more processors;

[0049] a memory;

[0050] one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to perform operations corresponding to the saline-alkali soil irrigation method according to any possible implementation manner of the first aspect.

[0051] In a fourth aspect, a computer-readable storage medium is provided, which stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the saline-alkali soil irrigation method according to any possible implementation manner of the first aspect.

[0052] In a fifth aspect, a saline-alkali soil treatment system is provided, which comprises:

[0053] a soil water and salt migration monitoring system configured to monitor soil information in real time, wherein the soil information at least comprises soil water content and soil conductivity;

[0054] an irrigation system configured to extract a water source to make the water source pass through an irrigation pipeline to irrigate crops;

[0055] a smart control system connected with the soil water and salt migration monitoring system and the irrigation system, and configured to implement the saline-alkali soil irrigation method according to any one of the first aspect to leach soil salt with irrigation water.

[0056] a subsurface pipe drainage and salt removal system arranged in a soil layer, configured to drain water leaching soil salt by irrigation or rainfall and collect the drainage through a water collection pipeline to a water storage interval or a drainage channel.

[0057] Water storage room, for storing the drainage delivered by the subsurface drainage and salt removal system.

[0058] In summary, the present application includes at least one of the following beneficial technical effects:

[0059] 1. Periodically acquire soil information of the target irrigation area and the current month, determine the accurate irrigation amount and soil information threshold according to the current month from the preset irrigation information, and determine the need for irrigation according to the soil information and the soil information threshold, then control the irrigation system to automatically realize water irrigation according to the irrigation amount, improve the irrigation efficiency and water resource utilization rate, and improve the saline-alkali land treatment and prevention effect. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 A structural schematic diagram of a saline-alkali land treatment system provided by the embodiment of the present application;

[0061] Figure 2 A flowchart of a saline-alkali land irrigation method provided by the embodiment of the present application;

[0062] Figure 3 A flowchart of determining the supplemental irrigation demand provided by the embodiment of the present application;

[0063] Figure 4 A flowchart of sprinkler irrigation control provided by the embodiment of the present application

[0064] Figure 5 A structural schematic diagram of a saline-alkali land irrigation device provided by the embodiment of the present application;

[0065] Figure 6 A structural schematic diagram of a smart control system provided by the embodiment of the present application. DETAILED DESCRIPTION

[0066] The following will be described in detail with reference to the accompanying drawings. Figure 1 to the accompanying drawings Figure 6 The present application will be further described in detail.

[0067] The present embodiment is only an explanation of the present application, and is not a limitation of the present application. Those skilled in the art can make modifications to the present embodiment without creative contribution after reading the present specification, but as long as the modifications are within the scope of the present application, they are protected by the patent law.

[0068] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0069] In addition, the term "and / or" in the present application only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects unless otherwise specified.

[0070] The present application relates to the field of saline-alkali soil treatment and ecological restoration, and specifically provides a method for treating saline-alkali soil by combining underground pipe salt drainage and precise irrigation. In order to facilitate understanding, please refer to Figure 1 , Figure 1 A structural schematic diagram of a saline-alkali soil treatment system 10 provided by the present application is shown in the figure, which comprises:

[0071] A soil water and salt migration monitoring system 100 is used for monitoring soil information in real time, and the soil information at least includes soil water content and soil conductivity, so as to accurately obtain the salinization level in the soil.

[0072] An irrigation system 200 is used for extracting a water source so that the water source is used for crop irrigation through an irrigation pipeline.

[0073] A smart control system 300 connected with the soil water and salt migration monitoring system 100 and the irrigation system 200 respectively is used for obtaining soil information of a target irrigation area and a current month, the soil information including soil water content and soil conductivity; according to the current month, a preset irrigation information is determined to obtain an irrigation amount corresponding to the current month and soil information threshold values, the soil information threshold values including soil water content threshold values and soil conductivity threshold values; according to the soil information and the soil information threshold values, it is determined whether irrigation is needed; if irrigation is needed, the irrigation system 200 is controlled to perform water source irrigation according to the irrigation amount.

[0074] An underground pipe drainage and salt drainage system 400 arranged in a soil layer is used for draining water containing salt in the soil washed by irrigation or rainfall, and collecting the drainage through a water collecting pipeline to a water storage room for recycling of water resources such as brackish water, or discharging into a drainage ditch.

[0075] A water storage room 500 is used for storing the drainage delivered by the underground pipe drainage and salt drainage system.

[0076] In one feasible approach, the irrigation system 200 is a brackish water combined irrigation system, including irrigation pipes and reuse pipes.

[0077] The soil water and salt transport monitoring system 100 includes: a soil water meter, an electrical conductivity meter, a groundwater level meter, and a water mineralization meter. Each meter is installed at multiple locations in the soil or water source to detect relevant information. The specific installation locations are not limited in this embodiment.

[0078] The concealed drainage and salt removal system 400 includes: a water collection well and water collection pipes;

[0079] The intelligent control system 300 includes an irrigation control system that controls the irrigation system and an intelligent control center that controls the soil water and salt transport monitoring system; after each measuring instrument in the soil water and salt transport monitoring system 100 detects soil information, it sends it to the intelligent control center of the intelligent control system.

[0080] The water storage room 500 includes a water storage space, an overflow outlet, and a pumping station.

[0081] Specifically, this application provides a method for irrigating saline-alkali land, such as... Figure 1 As shown, the method provided in this application embodiment can be executed by an intelligent control system, which can be a server or a terminal device. The server can be an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smartphone, tablet, laptop, desktop computer, etc., but is not limited to these. The terminal device and the server can be directly or indirectly connected via wired or wireless communication. This application embodiment does not impose any limitations on this connection. The saline-alkali land irrigation method includes:

[0082] S101. Periodically acquire soil information for the target irrigation area and the current month. Soil information includes: soil moisture content and soil electrical conductivity.

[0083] The acquisition period can be customized.

[0084] Alternatively, based on the current month and month information, determine the corresponding cycle for the current month. The month information is the correspondence between different months and different cycles. The cycle of the rainy season months can be longer than that of the dry months, so as to obtain soil information more frequently in the dry months to determine whether irrigation is needed and to promptly identify the irrigation needs of crops.

[0085] Or, the next month is dynamically adjusted based on the historical period soil information, specifically, the change rate of the soil information is determined to increase according to the historical soil information of a preset number of periods corresponding to the current time, and a difference between the soil information corresponding to the current time and the soil information threshold is less than a preset difference threshold, which indicates that the soil water content is rapidly decreasing or the soil conductivity is rapidly increasing, and the threshold will be reached soon, which is not conducive to crop growth, at this time, the period is reduced to determine the soil water demand more frequently, so as to find the water demand time and automatically irrigate in time, and the size of the period after the reduction is not limited in the embodiment of the application.

[0086] S102, from the preset irrigation information, determine the irrigation amount corresponding to the current month and the soil information threshold, the soil information threshold includes the soil water content threshold and the soil conductivity threshold;

[0087] The preset irrigation information is the association relationship between the multiple months, the multiple irrigation amounts and the multiple soil information thresholds, and the preset irrigation information is obtained by a user based on experience or based on a test environment for crop planting or by a formula.

[0088] S103, determine whether irrigation is needed according to the soil information and the soil information threshold;

[0089] S104, if irrigation is needed, control the irrigation system to irrigate the water source according to the irrigation amount.

[0090] When at least one of the soil water content is lower than the soil water content threshold and the soil conductivity is higher than the soil conductivity threshold is met, it is determined that irrigation is needed; otherwise, it is determined that irrigation is not needed, so as to automatically monitor the water demand of the soil through the soil information and the soil information threshold, and then control the irrigation system to irrigate based on the irrigation amount when irrigation is needed to realize automatic and accurate irrigation of the saline-alkali soil. The water source can be water in a water storage room and / or water in a river channel, and in one possible implementation, the salinity of the water in the water storage room is less than 2 g / L. It can be seen that in the embodiment of the application, the soil information of the target irrigation area and the current month are periodically obtained, the accurate irrigation amount and the soil information threshold suitable for the characteristics of the current month are determined from the preset irrigation information according to the current month, and when it is determined that irrigation is needed according to the soil information and the soil information threshold, the irrigation system is automatically controlled to realize water source irrigation according to the irrigation amount, thereby improving the irrigation efficiency and the water resource utilization rate.

[0091] In one possible implementation of the application, the preset irrigation information can include: the soil water content threshold is 9% and the soil conductivity threshold is 5 dS / m in April-June, the irrigation amount is 1200-1550 m 3 / hm 2; the soil water content threshold value is 9%, the soil electrical conductivity threshold value is 9 dS / m, and the irrigation amount is 800-1200 m 3 / hm 2 ; the soil electrical conductivity threshold value is 15 dS / m, and the irrigation amount is 1800-2250 m 3 / hm 2 .

[0092] In another possible implementation manner of the present application, the irrigation amount in the preset irrigation information can be calculated based on a formula. Specifically, the specific calculation process of the irrigation amount in the Hetao irrigation area can include the following steps.

[0093] 1. Crop growth water requirement W Cd Calculation

[0094] W Cd = ET * A (1)

[0095] ET = max [0, ET c - P e ] (2)

[0096] ET c = K c * ET0 (3)

[0097] P e = P e(month) (4)

[0098]

[0099] In the formula:

[0100] A, is the planting area, m 2 ;

[0101] ET c , is the evapotranspiration during the crop growth period, mm;

[0102] P e , is the effective precipitation during the crop growth period (corresponding to the month), mm; P e (month)ini, P e (month)mid, and P e (month)end represent the rainfall accumulation amount during the initial growth period, the growth period, and the end growth period of the crop, respectively (the data is derived from the National Science and Technology Infrastructure Platform—National Earth System Science Data Center);

[0103] P month , is the precipitation during the crop growth period, mm / month;

[0104] ET0, potential evapotranspiration, mm / month; ET0 ini, ET0 mid, ET0 end represent the potential evapotranspiration in the early growth stage, the growth stage, and the late growth stage of crops, respectively (data from National Earth System Science Data Center of National Science and Technology Infrastructure);

[0105] K c , is the crop coefficient; K c ini, K c mid, K c end represent the crop coefficient in the early growth stage, the growth stage, and the late growth stage of crops, respectively (FAO, 2020).

[0106] 2. Leaching soil salt water requirement W ld is calculated as follows (6)-(8):

[0107] W ld = D i *A (6)

[0108]

[0109]

[0110] In the formula:

[0111] W ld : soil salt leaching water requirement, m 3

[0112] A: is the planting area of crops, hm 2

[0113] D i : irrigation water thickness, mm, affected by the leaching coefficient;

[0114] ET c , evapotranspiration, mm;

[0115] LR: leaching coefficient;

[0116] EC i : is the electrical conductivity of irrigation water, dS / m;

[0117] EC d : is the maximum electrical conductivity that can be tolerated in the root layer, dS / m.

[0118] 1. Irrigation water requirement Q tot

[0119] The irrigation water requirement (Q tot ) is calculated according to the following formula (9):

[0120] Q tot = Q​​net / (η f *η c ) (9)

[0121] wherein:

[0122] η f , field utilization coefficient;

[0123] η c , canal utilization coefficient;

[0124] Q net , net irrigation water requirement, (m 3 ), the net irrigation water requirement is different in different seasons:

[0125] (1) irrigation water requirement in April to June

[0126] Q net = W cd +W ld (10)

[0127] (2) irrigation water requirement in July to August

[0128] Q tnet = Max [W cd , W ld ] (11)

[0129] (3) irrigation water requirement in October to November

[0130] Q tnet = W ld (12)

[0131] The precise irrigation amount (irrigation water requirement) can be calculated through the above formula.

[0132] In a possible implementation of the embodiment, the soil layer of the target irrigation area is provided with a buried pipe drainage and salt removal system for draining water containing salt leached from the soil by irrigation or rainfall, and collecting the drainage through a water collecting pipe to a water storage room or a drainage ditch; the buried pipe is arranged to drain water and remove salt, so that the soil moisture is reduced to reduce the toxicity to the crop root system, and the crop can normally absorb water and nutrients, and thus normally grow and develop.

[0133] The saline-alkali soil irrigation method further includes:

[0134] obtaining the water quality salinity of the water storage room;

[0135] determining whether the water quality salinity of the water storage room is greater than a first water quality salinity threshold; if yes, controlling the water pumping station of the water storage room to discharge the water in the water storage room.

[0136] In the embodiments of the present application, the underground drainage and salt discharge system is arranged to discharge the water containing salt from the soil irrigated or washed by rain, and the water is collected by the water collecting pipeline and stored in the storage room, and the water quality salinity detector is arranged in the storage room. The water quality salinity detected by the water quality salinity detector in the storage room is obtained; if the water quality salinity is greater than the first water quality salinity threshold, it indicates that the water in the storage room at this time is non-recyclable water resource, and if it is used for irrigating crops, it may affect the normal growth and development of crops, therefore, the water pump station of the storage room is controlled to discharge the water in the storage room, so as to ensure that the water quality salinity of the water in the storage room can be suitable for crop irrigation, so as to recycle the quickly discharged fresh water or slightly salty water that can be used for irrigation; wherein the first water quality salinity threshold can be 2g / L.

[0137] Further, the size of the water quantity in the storage room can also be detected, and under the condition that the storage water quantity in the storage room reaches the storage water quantity threshold and meets the first water quality salinity threshold, the water in the storage room is pumped to the water source to ensure that the storage room can continuously store water.

[0138] It can be seen that when the water quality salinity in the storage room is greater than the first water quality salinity threshold, it indicates that the salt content of the water in the storage room is excessive and cannot be used as a water source for crop irrigation, at this time, the water in the storage room is discharged to provide space for the storage room to store the drainage again.

[0139] Further, before obtaining the water quality salinity of the storage room, it further includes:

[0140] The flow rate of the drainage is obtained;

[0141] When the flow rate of the drainage is greater than the preset flow rate threshold, the water quality salinity of the drainage is obtained;

[0142] When the water quality salinity of the drainage is greater than the second water quality salinity threshold, the electromagnetic valve at the water inlet of the storage room is closed, so that the drainage is introduced into the drainage channel through the drainage pipeline, and the water inlet of the storage room is the water inlet at the junction of the underground drainage and salt discharge system and the storage room.

[0143] Wherein, the flowmeter can be arranged at the drainage outlet to monitor the flow rate of the drainage. The preset flow rate threshold can be set by the user, and when the flow rate of the drainage is greater than the preset flow rate threshold, it indicates that a large amount of drainage will flow into the storage room through the pipeline, and if the water quality salinity of the drainage is greater than the second water quality salinity threshold, it indicates that the concentration of the drainage flowing into the storage room is much greater than the first water quality salinity threshold, at this time, if a large amount of water flows into the storage room, it may cause the water quality salinity of the storage room to exceed the standard, therefore, the drainage is introduced into the drainage channel, which does not affect the water quality salinity of the storage room as irrigation water for crops.

[0144] It can be seen that in the embodiment of the present application, the flow rate of the drainage is monitored. When the flow rate of the drainage is greater than the preset flow rate threshold, and the water quality salinity of the drainage is greater than the second water quality salinity threshold, if the drainage is stored in the water storage room, the water quality salinity of the water storage room will rapidly rise. Therefore, the drainage is introduced into the drainage channel, and the drainage is prevented from flowing into the water storage room, thereby reducing the waste of water resources.

[0145] Specifically, in order to accurately determine whether the target irrigation area needs to be irrigated, the soil information includes soil information of a plurality of sub-regions, and the plurality of sub-regions are sub-regions obtained by dividing the target irrigation area. The division of the sub-regions is not limited in the embodiment of the present application. After the sub-regions are divided, a soil water and salt transport monitoring system is arranged in each sub-region, so that the soil information of each sub-region can be monitored.

[0146] In an implementable manner, the determination of whether irrigation is needed according to the soil information and the soil information threshold includes: determining average soil information of the target irrigation area according to the soil information of the plurality of sub-regions; and determining whether irrigation is needed according to the average soil information and the soil information threshold.

[0147] The average soil information includes an average soil water content and an average soil electrical conductivity threshold. When at least one of the average soil water content being lower than a soil water content threshold and the average soil electrical conductivity being higher than a soil electrical conductivity threshold is satisfied, it is determined that irrigation is needed. Otherwise, it is determined that irrigation is not needed. By monitoring the soil information at different positions to determine the irrigation demand, the accuracy of the irrigation demand determination can be improved.

[0148] In another implementable manner, the determination of whether irrigation is needed according to the soil information and the soil information threshold includes: for the soil information of each sub-region, determining demand information according to the soil information of each sub-region and the soil information threshold; and determining whether the target irrigation area needs to be irrigated according to the demand information of each sub-region.

[0149] For the soil information of each sub-region, the soil information of the sub-region is compared with the soil information threshold. If at least one of the soil water content being lower than a soil water content threshold and the soil electrical conductivity being higher than a soil electrical conductivity threshold is satisfied, it is determined that the demand information of the sub-region is irrigation needed. Otherwise, it is determined that irrigation is not needed.

[0150] If the number of sub-regions needing irrigation is greater than a preset irrigation number, it is determined that irrigation is needed. Otherwise, it is determined that irrigation is not needed. The preset irrigation number can be 1, 2 or 3, which can be set by the user according to actual needs.

[0151] By determining the water demand of each sub-region, the demand of the target irrigation area can be better grasped, and the accuracy of the irrigation demand determination can be improved.

[0152] Further, after irrigation, some areas in the target irrigation area may not be fully irrigated due to topography or soil quality, etc., affecting the growth of crops, so the embodiments of the application divide the target irrigation area, determine the position that needs to be irrigated by combining the soil information of the divided sub-areas, so as to targetedly supplement irrigation and ensure the water demand of crops. Specifically, if irrigation is needed, the irrigation system is controlled to irrigate the water source according to the irrigation amount, and please refer to Figure 3 The method further comprises: S201-S204 (not shown in the figure), wherein:

[0153] S201, when the preset time length after the irrigation according to the irrigation amount is completed, the expected value corresponding to the post-irrigation soil information of the target irrigation area is determined according to the post-irrigation soil information of the plurality of sub-areas; S202, the variance is determined according to the number of sub-areas and the expected value of the target irrigation area.

[0154] The preset time length can be self-defined, which is 1h, 2h.

[0155] The post-irrigation soil information of the plurality of sub-areas is obtained, such as obtaining the mean value as the expected value μ based on the post-irrigation soil information of the plurality of sub-areas, and using The variance D(x) is calculated, wherein xi is the soil information of each sub-area, and n is the number of sub-areas.

[0156] It should be noted that the determined variance includes the variance corresponding to the soil moisture content and the variance corresponding to the soil electrical conductivity.

[0157] S203, when the variance is less than the preset variance threshold, a first prompt is generated, and the first prompt is used to prompt the user to complete the irrigation; the preset variance threshold can be self-defined by the user. When at least one of the variance corresponding to the soil moisture content and the variance corresponding to the soil electrical conductivity is less than the preset variance threshold, it indicates that the difference between all sub-areas is small, relatively concentrated, and the fluctuation or dispersion degree of the post-irrigation soil information is small. The first prompt can be to display the completion of irrigation on the display interface of the intelligent control system, or to send a short message to the user's client device to complete the irrigation.

[0158] S204, when the variance is not less than the preset variance threshold, a plurality of target sub-areas are determined from the plurality of sub-areas according to the post-irrigation soil information and the expected value, the target sub-area is a sub-area whose difference between the expected value and the post-irrigation soil information meets the preset condition; and a second prompt is generated according to the plurality of target sub-areas, and the second prompt is used to prompt the user that the plurality of target sub-areas need to be supplemented.

[0159] When the variance is not less than the preset variance threshold, it indicates that the soil humidity distribution is uneven, or the current soil conductivity is uneven, and some sub-regions are not fully irrigated. The expected value and the post-irrigation soil information are selected according to the post-irrigation soil information and the expected value, and the target sub-region with a difference greater than a preset threshold is selected.

[0160] The preset condition is (post-irrigation average soil moisture content - post-irrigation soil moisture content) > moisture content difference threshold, or (post-irrigation soil conductivity - post-irrigation average soil conductivity) > conductivity difference threshold, wherein the moisture content difference threshold and the conductivity difference threshold can be set by the user.

[0161] The second prompt includes the area location information of the target sub-regions and the post-irrigation soil information. The specific form of the second prompt can refer to the first prompt, and the embodiments of the present application are not limited thereto.

[0162] It can be seen that after the irrigation is completed, the expected value and the variance are determined based on the post-irrigation soil information of the plurality of sub-regions. When the variance is less than the preset variance threshold, it indicates that each sub-region is fully irrigated. When the variance is not less than the preset variance threshold, it indicates that some sub-regions are not fully irrigated. Then, the region corresponding to the information with large difference is selected as the insufficiently irrigated region from the post-irrigation soil information, and a prompt is given, so that the user can supplement irrigation in a targeted manner to ensure the water demand of crops.

[0163] Further, after the second prompt is generated according to the plurality of target sub-regions, as shown in Figure 4 , it further includes S301-S305, wherein:

[0164] S301, for each target sub-region, determining a plurality of first sprinkling points corresponding to the target sub-region according to the sub-regions corresponding to each sprinkling point;

[0165] Each sprinkling point corresponds to a sprinkling device for crop sprinkling. One sprinkling point corresponds to a plurality of sub-regions, and the regions corresponding to the sprinkling points intersect, such as the sprinkling point a corresponding to the sub-region 1, the sub-region 2 and the sub-region 3; the sprinkling point b corresponding to the sub-region 3 and the sub-region 4; the sprinkling point c corresponding to the sub-region 1 and the sub-region 4.

[0166] S302, constructing a relationship table of the target sub-region and the number of sub-regions corresponding to each first sprinkling point;

[0167] The relationship table is constructed, as shown in Table 1.

[0168] Table 1, first relationship table

[0169]

[0170] S303, determining, according to the relationship table, the first sprinkling point with the largest number of sub-regions as the target sprinkling point, and deleting the information of the first sprinkling point with the largest number of sub-regions and the set sub-regions in the sub-regions corresponding to the other first sprinkling points in the relationship table, the set sub-regions being the sub-regions corresponding to the first sprinkling point with the largest number of sub-regions;

[0171] It is determined that the target sprinkling point is the first sprinkling point p, and the corresponding content in the relationship table is deleted to obtain Table 2.

[0172] Table 2, second relationship table

[0173] First sprinkling point Target sub-area Number of sub-areas First sprinkling point o Target sub-area 1, target sub-area 3 2 First sprinkling point q Target sub-area 3 1

[0174] S304, determining whether the target sub-region exists in the relationship table; if not, performing S305, and if yes, performing S303 based on the relationship table after the deletion;

[0175] There are the target sub-region 1, the target sub-region 2 and the target sub-region 3 in Table 2, S303 is performed based on Table 2 to determine that the target sprinkling point is the first sprinkling point o, the corresponding content in Table 2 is deleted, and the obtained table is empty, that is, the target sub-region does not exist in the relationship table, and S305 is performed. At this time, the target sprinkling point determined is the first sprinkling point p and the first sprinkling point o.

[0176] S305, controlling the sprinkling equipment corresponding to the target sprinkling point in the irrigation system to perform the sprinkling of the target sub-region according to the target sprinkling point.

[0177] It can be seen that in the embodiment of the application, after it is determined that the target sub-region needs to be supplemented, a plurality of first sprinkling points corresponding to each sub-region are determined, a relationship table of the target sub-region and the number of sub-regions corresponding to each first sprinkling point is constructed, and the least sprinkling point, that is, a plurality of target sprinkling points, capable of covering all the target sub-regions is selected based on the relationship table. The sprinkling equipment corresponding to the target sprinkling point in the irrigation system is controlled to perform the sprinkling of the target sub-region according to the target sprinkling point, so that all the regions needing to be supplemented can be effectively covered by the least sprinkling equipment, and the waste of water resources can be reduced.

[0178] In an implementable manner, the water source includes a fresh water source and a brackish water source, and the irrigation system is controlled to perform water source irrigation according to the irrigation amount, including:

[0179] The proportion of the fresh water source and the brackish water source is determined according to the current month, and the irrigation system is controlled to perform water source irrigation based on the proportion and the irrigation amount.

[0180] The system is preset with a corresponding relationship between the month and the proportion, the corresponding relationship is set by a user based on actual experience, and the crops can grow normally by using the proportion for irrigation.

[0181] It can be known that the ratio of fresh water source and brackish water source can be determined according to time in the embodiment of the application, the brackish water resource is reasonably utilized for irrigation, the water body for leaching soil salt is discharged by the buried pipe, the soil salt content is reduced, and the water resource utilization efficiency is improved under the condition of ensuring the normal growth of crops.

[0182] In the above embodiment, a saline-alkali soil irrigation method is introduced from the perspective of method flow, and the following embodiment introduces a saline-alkali soil irrigation device from the perspective of module or unit. For details, see the following embodiment.

[0183] The embodiment of the application provides a saline-alkali soil irrigation device, as shown in the figure, which can include: Figure 5

[0184] The acquisition module 510 is configured to periodically acquire soil information of the target irrigation area and a current month, and the soil information includes soil water content and soil conductivity.

[0185] The information determination module 520 is configured to determine, according to the current month, an irrigation amount corresponding to the current month and a soil information threshold from the preset irrigation information, and the soil information threshold includes a soil water content threshold and a soil conductivity threshold.

[0186] The irrigation demand determination module 530 is configured to determine whether irrigation is needed according to the soil information and the soil information threshold.

[0187] The irrigation module 540 is configured to control the irrigation system to perform water source irrigation according to the irrigation amount if irrigation is needed.

[0188] In a possible implementation, the soil layer of the target irrigation area is provided with a buried pipe drainage and salt removal system for discharging water for leaching soil salt during irrigation or rainfall, and collecting the drainage through a water collecting pipeline to a water storage room or a drainage channel; the saline-alkali soil irrigation device further includes:

[0189] The water quality salinity acquisition module is configured to acquire the water quality salinity of the water storage room.

[0190] The first control module is configured to determine whether the water quality salinity of the water storage room is greater than a first water quality salinity threshold; if yes, the water pump station of the water storage room is controlled to discharge the water in the water storage room.

[0191] In a possible implementation, the device further includes:

[0192] The flow rate determination module is configured to acquire the flow rate of the drainage.

[0193] The water quality salinity acquisition module of the drainage is configured to acquire the water quality salinity of the drainage when the flow rate of the drainage is greater than a preset flow rate threshold.

[0194] ​The second control module is configured to close the electromagnetic valve at the water inlet of the water storage room when the salinity of the drainage is greater than the second water quality salinity threshold, so as to guide the drainage into the drainage channel through the drainage pipeline, the water inlet being the water inlet at the junction of the underground drainage salt removal system and the water storage room.

[0195] In a possible implementation, the soil information includes soil information of a plurality of sub-regions, and the plurality of sub-regions are sub-regions obtained by dividing the target irrigation region;

[0196] The irrigation demand determination module 530 determines whether irrigation is needed according to the soil information and the soil information threshold, and is configured to: determine average soil information of the target irrigation region according to the soil information of the plurality of sub-regions; and determine whether irrigation is needed according to the average soil information and the soil information threshold.

[0197] Or,

[0198] For the soil information of each sub-region, the demand information is determined according to the soil information of each sub-region and the soil information threshold; and whether the target irrigation region needs irrigation is determined according to the demand information of each sub-region.

[0199] In a possible implementation, the system further includes:

[0200] The supplemental irrigation demand determination module is configured to:

[0201] When a preset time length after the irrigation according to the irrigation amount is completed, the post-irrigation soil information of the target irrigation region is determined according to the post-irrigation soil information of the plurality of sub-regions.

[0202] The variance is determined according to the number of sub-regions of the plurality of sub-regions and the expected value of the target irrigation region.

[0203] When the variance is less than a preset variance threshold, a first prompt is generated, and the first prompt is used to prompt the user to complete the irrigation.

[0204] When the variance is not less than the preset variance threshold, a plurality of target sub-regions are determined from the plurality of sub-regions according to the post-irrigation soil information of the plurality of sub-regions and the expected value, the target sub-region being a sub-region whose difference between the expected value and the post-irrigation soil information satisfies a preset condition; and a second prompt is generated according to the plurality of target sub-regions, and the second prompt is used to prompt the user that the plurality of target sub-regions need supplemental irrigation.

[0205] In a possible implementation, the system further includes:

[0206] The sprinkling determination module is configured to:

[0207] For each target sub-region, a plurality of first sprinkling points corresponding to the target sub-region are determined according to the sub-regions corresponding to the plurality of sprinkling points.

[0208] Construct a table showing the relationship between each first sprinkler point and the target sub-region and the number of sub-regions;

[0209] Steps to determine the target sprinkler point: Based on the relationship table, determine the first sprinkler point with the largest number of sub-regions as the target sprinkler point, and delete the information of the first sprinkler point with the largest number of sub-regions in the relationship table, as well as the set sub-regions in the sub-regions corresponding to the other first sprinkler points. The set sub-region is the sub-region corresponding to the first sprinkler point with the largest number of sub-regions.

[0210] Repeat the step of determining the target sprinkler point until there is no target sub-region in the relationship table, and obtain all target sprinkler points; control the sprinkler equipment in the irrigation system corresponding to the target sprinkler point to perform sprinkler irrigation of the target sub-region according to the target sprinkler point.

[0211] In one possible implementation, the water source includes both freshwater and brackish water. The irrigation module controls the irrigation system to provide water for irrigation based on the irrigation volume, for the purpose of:

[0212] The ratio of freshwater to brackish water sources will be determined based on the current month.

[0213] Irrigation systems are designed to control water supply based on ratios and irrigation volume.

[0214] The saline-alkali land irrigation device provided in this application embodiment is applicable to the above method embodiment, and will not be described again here.

[0215] This application provides an intelligent control system, such as... Figure 6 As shown, Figure 6 The intelligent control system 300 shown includes a processor 301 and a memory 303. The processor 301 and the memory 303 are connected, for example, via a bus 302. Optionally, the intelligent control system 300 may also include a transceiver 304. It should be noted that in practical applications, the transceiver 304 is not limited to one, and the structure of this intelligent control system 300 does not constitute a limitation on the embodiments of this application.

[0216] The processor 301 can be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It can implement or execute the various exemplary logical blocks, modules and circuits described in connection with the disclosure. The processor 301 can also be a combination of computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0217] The bus 302 can include a path for transmitting information between the above-mentioned components. The bus 302 can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, or the like. The bus 302 can be divided into an address bus, a data bus, a control bus, and the like. For convenience of representation, Figure 6 In the figure, only one thick line is used, but it does not mean that there is only one bus or only one type of bus.

[0218] The memory 303 can be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, an optical disk storage (including a compact disk, a laser disk, an optical disk, a digital versatile disk, a Blu-ray disk, and the like), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0219] The memory 303 is configured to store application program codes for implementing the solutions of the present application, and the processor 301 is configured to control the execution of the application program codes stored in the memory 303. The processor 301 is configured to execute the application program codes stored in the memory 303 to implement the content shown in the foregoing method embodiments.

[0220] The smart control system includes, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablets), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. Figure 6 The illustrated smart control system is merely an example and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0221] The embodiments of the present application provide a computer readable storage medium, which has stored thereon a computer program, and when the computer program is run on a computer, the computer can execute the corresponding content in the foregoing method embodiments.

[0222] It should be understood that, although each step in the flowchart of the accompanying drawings is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the flowchart of the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or sub-steps or stages of other steps.

[0223] The above is only some of the embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method of irrigating a saline soil, characterized by, The method comprises the following steps: Periodically acquiring soil information of a target irrigation area and a current month, the soil information comprising soil water content and soil conductivity; According to the current month, determining an irrigation amount and soil information thresholds corresponding to the current month from preset irrigation information, the soil information thresholds comprising a soil water content threshold and a soil conductivity threshold; Determining whether irrigation is needed according to the soil information and the soil information thresholds; If irrigation is needed, controlling an irrigation system to perform water source irrigation according to the irrigation amount; If irrigation is needed, after the irrigation system performs water source irrigation according to the irrigation amount, the method further comprises the following steps: When a preset time length after irrigation is completed according to the irrigation amount, determining an expected value corresponding to post-irrigation soil information of the target irrigation area according to post-irrigation soil information of a plurality of sub-areas; Determining a variance according to a number of sub-areas of the plurality of sub-areas and the expected value of the target irrigation area; When the variance is less than a preset variance threshold, generating a first prompt, the first prompt being used to prompt a user to complete irrigation; When the variance is not less than the preset variance threshold, determining a plurality of target sub-areas from the plurality of sub-areas according to the post-irrigation soil information of the plurality of sub-areas and the expected value, the target sub-areas being sub-areas whose difference between the expected value and the post-irrigation soil information satisfies a preset condition; and generating a second prompt according to the plurality of target sub-areas, the second prompt being used to prompt the user that the plurality of target sub-areas need to be subjected to supplementary irrigation, the preset condition being: (post-irrigation average soil water content-post-irrigation soil water content) > water content difference threshold, or (post-irrigation soil conductivity-post-irrigation average soil conductivity) > conductivity difference threshold; After the second prompt is generated according to the plurality of target sub-areas, the method further comprises the following steps: For each target sub-area, determining a plurality of first sprinkling points corresponding to the target sub-area according to sub-areas corresponding to each sprinkling point; Constructing a relationship table of each first sprinkling point, the target sub-area and the number of sub-areas corresponding to the first sprinkling point; A target sprinkling point determination step: determining a first sprinkling point with the largest number of sub-areas as the target sprinkling point according to the relationship table, and deleting information of the first sprinkling point with the largest number of sub-areas and a set sub-area in sub-areas corresponding to other first sprinkling points in the relationship table, the set sub-area being a sub-area corresponding to the first sprinkling point with the largest number of sub-areas; Repeating the target sprinkling point determination step until there is no target sub-area in the relationship table, and obtaining all target sprinkling points; Controlling sprinkling equipment corresponding to the target sprinkling point in the irrigation system to perform sprinkling irrigation on the target sub-area according to the target sprinkling point; The specific calculation process of the irrigation amount comprises the following steps: ； ＝ ； ＝ × ； ET = max [0, - ] ; = ET * A, determining crop water requirement ; In the formula: A, the planting area, ; Evapotranspiration for the crop growth period, mm; , effective rainfall for the crop growth period corresponding to the month, mm ini, mid, end respectively indicate the rainfall accumulation amount at the early growth stage, the growth and development stage, and the late growth stage of the crop for the crop growing period, mm / month; , potential evapotranspiration, mm / month; ini, mid, end represent the potential evapotranspiration at the beginning of the growth, during the growth and at the end of the growth, respectively; crop coefficient; ini, mid, end respectively represent the crop coefficient at the initial growth stage, the growth development stage, and the final growth stage of the crop. According to ; ； = Wld = Wld + Wle A, determine the water requirement of leaching soil salt Wld; In the formula: : water requirement for salt leaching in soil, ; A: the planting area of the crop, h ; : irrigation water thickness, mm, influenced by leaching coefficient; : evaporation, mm; LR: leaching coefficient; : Conductivity of irrigation water, dS / m; : maximum conductivity allowable in the root zone, dS / m; According to = / * ), determine irrigation water requirement ; In the formula: , field utilization coefficient; , canal utilization coefficient; Net irrigation water requirement, Net irrigation water requirement varies with seasons: 4-6 month irrigation water requirement: = + ; July-August irrigation water requirement: = Max[ , ]; 10-11 month irrigation water requirement: = .

2. The method of claim 1, wherein, The soil layer of the target irrigation area is provided with a buried pipe drainage and salt removal system, which is used to drain water containing salt removed from the soil by irrigation or rainfall leaching, and collect the drainage through a water collecting pipeline to a water storage room or a drainage ditch; the saline-alkali land irrigation method further comprises the following steps: Acquiring water quality salinity of the water storage room; Determining whether the water quality salinity of the water storage room is greater than a first water quality salinity threshold; If yes, a water pump station of the water storage room is controlled to discharge water in the water storage room.

3. The method of claim 2, wherein, Before the water quality salinity of the water storage room is acquired, the method further includes: acquiring a flow rate of the drainage water; when the flow rate of the drainage water is greater than a preset flow rate threshold, acquiring a water quality salinity of the drainage water; when the water quality salinity of the drainage water is greater than a second water quality salinity threshold, closing an electromagnetic valve at a water inlet of the water storage room so as to introduce the drainage water into a drainage channel through a drainage pipeline, the water inlet of the water storage room being a water inlet at an intersection between the underground drainage salt discharge system and the water storage room.

4. The method of claim 1, wherein, The soil information includes soil information of a plurality of sub-regions, and the plurality of sub-regions are sub-regions obtained by dividing the target irrigation region; The determining whether irrigation is needed according to the soil information and the soil information threshold includes: determining average soil information of the target irrigation region according to the soil information of the plurality of sub-regions; determining whether irrigation is needed according to the average soil information and the soil information threshold; or for the soil information of each sub-region, determining demand information according to the soil information of each sub-region and the soil information threshold; determining whether the target irrigation region needs irrigation according to the demand information of each sub-region. The water source includes fresh water and brackish water, and the controlling the irrigation system to perform water source irrigation according to the irrigation amount includes:

5. The method of claim 1, wherein, determining a ratio of fresh water and brackish water according to the current month; controlling the irrigation system to perform water source irrigation based on the ratio and the irrigation amount. The method includes:

6. A saline-alkali soil irrigation device, characterized in that, acquiring, periodically, soil information of a target irrigation region and a current month, the soil information including soil water content and soil electrical conductivity; determining, from preset irrigation information, an irrigation amount corresponding to the current month and a soil information threshold corresponding to the current month according to the current month, the soil information threshold including a soil water content threshold and a soil electrical conductivity threshold; determining whether irrigation is needed according to the soil information and the soil information threshold; controlling the irrigation system to perform water source irrigation according to the irrigation amount if irrigation is needed; wherein the supplemental irrigation demand determination module is configured to: determining an expected value corresponding to post-irrigation soil information of the target irrigation region according to post-irrigation soil information of a plurality of sub-regions when a preset time length after the irrigation according to the irrigation amount is reached; determining a variance according to a number of sub-regions of the plurality of sub-regions and the expected value of the target irrigation region; generating a first prompt when the variance is less than a preset variance threshold, the first prompt being used to prompt a user to complete irrigation. ​ When the variance is not less than a preset variance threshold, a plurality of target sub-regions are determined from the plurality of sub-regions according to the post-irrigation soil information and the expected value of the plurality of sub-regions, the target sub-regions being sub-regions whose difference between the expected value and the post-irrigation soil information satisfies a preset condition; and a second prompt is generated according to the plurality of target sub-regions, the second prompt being used to prompt a user that the plurality of target sub-regions need to be supplemented with irrigation, the preset condition being: (post-irrigation average soil water content - post-irrigation soil water content) > water content difference threshold, or (post-irrigation soil conductivity - post-irrigation average soil conductivity) > conductivity difference threshold; The sprinkling irrigation determination module is configured to: For each target sub-region, a plurality of first sprinkling points corresponding to the target sub-region are determined according to the sub-regions corresponding to each sprinkling point; A relationship table of the target sub-region and the number of sub-regions corresponding to each first sprinkling point is constructed; The target sprinkling point determination step: according to the relationship table, the first sprinkling point with the largest number of sub-regions is determined as the target sprinkling point, and the information of the first sprinkling point with the largest number of sub-regions and the set sub-regions in the sub-regions corresponding to other first sprinkling points in the relationship table are deleted, the set sub-regions being the sub-regions corresponding to the first sprinkling point with the largest number of sub-regions; The target sprinkling point determination step is repeatedly executed until there is no target sub-region in the relationship table, and all target sprinkling points are obtained; The target sub-region is sprinkled by controlling the sprinkling equipment corresponding to the target sprinkling point in the irrigation system according to the target sprinkling point; The specific calculation process of the irrigation amount includes: ； ＝ ； ＝ × ； ET = max [0, - ] ; = ET * A, determining crop growth water requirement ; In the formula: A, the planting area, ; Evapotranspiration for the crop growth period, mm; , effective rainfall for the crop growth period corresponding to the month, mm ini, mid, end respectively indicate the rainfall accumulation amount at the early growth stage, the growth and development stage, and the late growth stage of the crop for the crop growing period, mm / month; , potential evapotranspiration, mm / month; ini, mid, end represent the potential evapotranspiration at the beginning of the growth, during the growth and at the end of the growth, respectively. crop coefficient; ini, mid, end respectively represent the crop coefficient at the initial growth stage, the growth development stage, and the final growth stage of the crop. According to ; ； = 0.5 * (Wld - Wle) / Wle A, determine the leaching soil salt water requirement Wld; In the formula: : water requirement for salt leaching in soil, ; A: the planting area of the crop, h ; : irrigation water thickness, mm, influenced by leaching coefficient; : evaporation amount, mm; LR: leaching coefficient; : Conductivity of irrigation water, dS / m; : maximum electrical conductivity allowable in the root zone, dS / m; According to = / * ), determine irrigation water requirement ; In the formula: , field utilization coefficient; , canal utilization coefficient; Net irrigation water requirement, Net irrigation water requirement varies with seasons: 4-6 month irrigation water requirement: = + ; July-August irrigation water requirement: = Max[ , ]; 10-11 month irrigation water requirement: .​ 7. A smart control system, characterized in that, It includes: One or more processors; Memory; One or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the one or more processors, and the one or more application programs are configured to execute the saline-alkali soil irrigation method according to any one of claims 1-5.

8. A system for saline soil remediation, characterized in that, It includes: A soil water and salt transport monitoring system for real-time monitoring of soil information, the soil information at least including soil water content and soil conductivity; An irrigation system for pumping water sources to irrigate crops through irrigation pipelines; An intelligent control system connected with the soil water and salt transport monitoring system and the irrigation system, for realizing the saline-alkali soil irrigation method according to any one of claims 1-5, so as to leach soil salt with irrigation water; An underground drainage and salt removal system arranged in the soil layer, for discharging water containing salt leached from the soil by irrigation or rainfall, and collecting the drainage through a water collection pipeline to a water storage room or a drainage ditch; A water storage room for storing the drainage delivered by the underground drainage and salt removal system.

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