Irrigation method, device, system and electronic equipment for farmland crops in saline-alkali areas

Abstract

The present invention provides a method, device, system and electronic device for crop irrigation in saline-alkali farmland, relating to the technical field of intelligent agriculture. The method includes: when it is determined that crop irrigation needs to be carried out on the target saline-alkali farmland based on the actual value and the target value of the soil salt storage in the target saline-alkali farmland, obtaining the irrigation amount of the target saline-alkali farmland based on the environmental data in the target saline-alkali farmland, and then carrying out crop irrigation on the target saline-alkali farmland based on the above irrigation amount. The method, device, system and electronic device for crop irrigation in saline-alkali farmland provided by the present invention can irrigate the target saline-alkali farmland more scientifically and reasonably based on the soil salt storage in the target saline-alkali farmland, not only meeting the demand-based supply of crop water in the target saline-alkali farmland, but also ensuring the relative stability of the salt concentration in the soil, effectively solving problems such as salt stress caused by salt migration during the production process of crops in saline-alkali farmland.

Description

Technical Field

[0001] The present invention relates to the field of smart agricultural technology, and in particular to a method, device, system and electronic equipment for irrigating farmland crops in saline-alkali areas. Background Art

[0002] Soil salinization refers to the process in which salt from the bottom of the soil accumulates to the surface of the soil as water moves to form saline soil. Soil salinization causes many kinds of harm to human activities, including affecting the physical and chemical properties of the soil, causing adverse effects on engineering facilities and land use, inhibiting plant growth, and reducing crop yields and quality. Reducing the migration and accumulation of deep salt to the surface soil during crop growth, and maintaining the relative stability of root layer salt, are key factors in reducing salt stress on crops in saline-alkali areas and promoting healthy crop growth.

[0003] However, unreasonable irrigation of farmland in saline-alkali areas can easily cause deep salt to migrate and accumulate in the surface soil, leading to secondary salinization in saline-alkali areas, further aggravating soil salinization in saline-alkali areas, causing crop yield reduction and affecting production efficiency. Therefore, scientific and reasonable irrigation of crops in saline-alkali areas is of great significance for increasing crop yields in saline-alkali areas, improving soil quality in saline-alkali areas, protecting the ecological environment and promoting sustainable agricultural development.

[0004] In the related art, the traditional irrigation method for farmland crops in saline-alkali areas mainly adopts the soil moisture sensor method, the crop evaporation model calculation method, the water surface evaporation method and other technologies to achieve the timely supply of crop water and reduce the risk of secondary salinization caused by excessive irrigation. However, the above-mentioned traditional irrigation method for farmland crops in saline-alkali areas cannot effectively control the migration and accumulation of soil salt in saline-alkali farmland to the surface soil, and reduce the large fluctuations in root layer soil salt. Therefore, how to irrigate farmland crops in saline-alkali areas more reasonably and scientifically, so as to more effectively control the migration and accumulation of soil salt in saline-alkali farmland to the surface soil, is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] The present invention provides a method, device, system and electronic equipment for irrigating crops in saline-alkali areas, which are used to solve the defects of the traditional method for irrigating crops in saline-alkali areas in the prior art and can effectively control the migration and accumulation of soil salt in saline-alkali areas to the surface soil, so as to realize more reasonable and scientific irrigation of crops in saline-alkali areas, thereby more effectively controlling the migration and accumulation of soil salt in saline-alkali areas to the surface soil.

[0006] The invention provides a method for irrigating crops in saline-alkali areas, comprising the following steps.

[0007] Get the current irrigation cycle of the target saline-alkali area farmland. The actual value of the soil salt storage in the target saline-alkali farmland at a time node, where the first time node in the current irrigation cycle is the starting moment of the current irrigation cycle, and the time interval between any two adjacent time nodes in the current irrigation cycle is a first preset duration. Represents a positive integer starting from 2.

[0008] Based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland, when it is determined that crop irrigation needs to be performed on the target crop planted in the target saline-alkali farmland, based on the environmental data in the target saline-alkali farmland during the period corresponding to the th time node, obtain the irrigation amount of the target saline-alkali farmland at the th time node. The period corresponding to the th time node is the period between the th time node and the th time node. The target value of the soil salt storage in the target saline-alkali farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali farmland. The basic parameters include soil bulk density and soil depth.

[0009] Based on the irrigation amount of the target saline-alkali farmland at the th time node, perform crop irrigation on the target crop planted in the target saline-alkali farmland. Increment by 1 and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node in the current irrigation cycle of the target saline-alkali farmland.

[0010] According to a crop irrigation method for saline-alkali farmland provided by the present invention, the target value of the soil salt storage in the target saline-alkali farmland is obtained based on the following steps:

[0011] Obtain the soil conductivity value of each layer of soil in the target saline-alkali farmland after standard temperature correction before the target crop is planted in the target saline-alkali farmland.

[0012] Based on the soil conductivity value of each layer of soil in the target saline-alkali farmland after standard temperature correction before the target crop is planted in the target saline-alkali farmland, obtain the soil salt content of each layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland.

[0013] Based on the soil salt content of each soil layer in the target saline-alkali area farmland before the target crop is planted in the target saline-alkali area farmland and the basic parameters of each soil layer in the target saline-alkali area farmland, calculate the cumulative salt content of the target saline-alkali area farmland before the target crop is planted in the target saline-alkali area farmland;

[0014] Based on the cumulative salt content of the target saline-alkali area farmland before the target crop is planted in the target saline-alkali area farmland, calculate the target value of the soil salt storage of the target saline-alkali area farmland at the th time node.

[0015] According to a crop irrigation method for saline-alkali area farmland provided by the present invention, based on the environmental data in the target saline-alkali area farmland during the period corresponding to the th time node, obtain the irrigation amount of the target saline-alkali area farmland at the th time node, including:

[0016] Based on the average daily wind speed, the average value of the daily minimum relative humidity at the target height of the target saline-alkali area farmland, and the average plant height of the target crop during the period corresponding to the th time node, calculate the crop coefficient correction value corresponding to the th time node;

[0017] Based on the crop coefficient correction value corresponding to the th time node and the reference crop evapotranspiration of the target saline-alkali area farmland at the th time node, calculate the irrigation amount of the target saline-alkali area farmland at the th time node.

[0018] According to a crop irrigation method for saline-alkali area farmland provided by the present invention, based on the actual value of the soil salt storage of the target saline-alkali area farmland at the th time node and the target value of the soil salt storage of the target saline-alkali area farmland, determine whether crop irrigation needs to be performed on the target crop planted in the target saline-alkali area farmland, including:

[0019] At the th time node, when the actual value of the soil salt storage of the target saline-alkali area farmland is greater than the product of the target value of the soil salt storage of the target saline-alkali area farmland and the salt target coefficient, determine that crop irrigation needs to be performed on the target crop planted in the target saline-alkali area farmland.

[0020] According to a crop irrigation method for saline-alkali area farmland provided by the present invention, obtain the The actual value of the soil salt storage in the target saline-alkali farmland at a time node, including:

[0021] Obtain the soil solution conductivity value of each layer of soil in the target saline-alkali farmland at the time node;

[0022] Based on the soil solution conductivity value of each layer of soil in the target saline-alkali farmland at the time node and the basic parameters of each layer of soil in the target saline-alkali farmland, calculate the actual value of the soil salt storage in the target saline-alkali farmland at the time node.

[0023] According to a crop irrigation method for saline-alkali farmland provided by the present invention, before obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the time node in the current irrigation cycle of the target saline-alkali farmland, the method further includes:

[0024] Based on the type of the target crop planted in the target saline-alkali farmland, determine the target soil depth corresponding to the target saline-alkali farmland;

[0025] Based on the target soil depth, divide the soil in the target saline-alkali farmland into a target number of layers;

[0026] Obtain the basic parameters of each layer of soil in the target saline-alkali farmland.

[0027] According to a crop irrigation method for saline-alkali farmland provided by the present invention, after obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the time node in the current irrigation cycle of the target saline-alkali farmland, the method further includes:

[0028] When it is determined, based on the actual value of the soil salt storage in the target saline-alkali farmland at the time node and the target value of the soil salt storage in the target saline-alkali farmland, that there is no need to irrigate the target crop planted in the target saline-alkali farmland, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the time node in the current irrigation cycle of the target saline-alkali farmland.

[0029] The present invention also provides a crop irrigation device for saline-alkali farmland, including the following modules:

[0030] A data acquisition module, configured to acquire the The actual value of the soil salt storage in the target saline-alkali farmland at a time node, where the first time node in the current irrigation cycle is the starting moment of the current irrigation cycle, and the time interval between any two adjacent time nodes in the current irrigation cycle is a first preset duration. Represents a positive integer starting from 2.

[0031] A data calculation module, configured to, when determining that crop irrigation needs to be performed on the target crop planted in the target saline-alkali farmland based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland, obtain the irrigation amount of the target saline-alkali farmland at the th time node based on the environmental data in the target saline-alkali farmland during the time period corresponding to the th time node. The time period corresponding to the th time node is the time period between the th time node and the th time node. The target value of the soil salt storage in the target saline-alkali farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali farmland, and the basic parameters include soil bulk density and soil depth.

[0032] A loop control module, configured to perform crop irrigation on the target crop planted in the target saline-alkali farmland based on the irrigation amount of the target saline-alkali farmland at the th time node, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node in the current irrigation cycle of the target saline-alkali farmland.

[0033] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the saline-alkali farmland crop irrigation method as described in any one of the above.

[0034] The present invention also provides a saline-alkali farmland crop irrigation system, including: the electronic device as described above, a profile soil salt test subsystem, an environmental information monitoring subsystem, and an irrigation control subsystem; the electronic device is electrically connected to the profile soil salt test subsystem, the environmental information monitoring subsystem, and the irrigation control subsystem respectively;

[0035] The profile soil salt test subsystem is configured to obtain the The actual value of the soil salt storage in the farmland of the target saline-alkali area at a time node, and send the obtained actual value of the soil salt storage in the farmland of the target saline-alkali area at the time node to the electronic device;

[0036] The environmental information monitoring subsystem is used to obtain the environmental data in the farmland of the target saline-alkali area during the period corresponding to the time node, and send the obtained environmental data in the farmland of the target saline-alkali area during the period corresponding to the time node to the electronic device;

[0037] The irrigation control subsystem is used to control the irrigation equipment to irrigate the target crops planted in the farmland of the target saline-alkali area based on the irrigation amount of the farmland of the target saline-alkali area at the time node sent by the electronic device.

[0038] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the saline-alkali area farmland crop irrigation method as described in any one of the above.

[0039] The present invention also provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the saline-alkali area farmland crop irrigation method as described in any one of the above.

[0040] The saline-alkali area farmland crop irrigation method, device, system and electronic device provided by the present invention, by obtaining the actual value of the soil salt storage in the farmland of the target saline-alkali area at the time node in the current irrigation cycle of the target saline-alkali area farmland, and based on the basic parameters of each layer of soil in the target saline-alkali area farmland, obtaining the target value of the soil salt storage in the farmland of the target saline-alkali area at the time node, and then based on the actual value and the target value of the soil salt storage in the farmland of the target saline-alkali area at the time node, when it is determined that crop irrigation needs to be performed on the target crops planted in the farmland of the target saline-alkali area, based on the environmental data in the farmland of the target saline-alkali area during the period corresponding to the time node, obtaining the irrigation amount of the farmland of the target saline-alkali area at the time node, and further based on the irrigation amount of the farmland of the target saline-alkali area at the time node, performing crop irrigation on the target crops planted in the farmland of the target saline-alkali area within the second preset duration after the time node, increase by 1, and return to execute to obtain the Steps for obtaining the actual value of the soil salt storage in the target saline-alkali farmland at a time node can, based on the soil salt storage in the target saline-alkali farmland, perform more scientific and reasonable irrigation on the target saline-alkali farmland, not only meeting the demand-based supply of crop water in the target saline-alkali farmland but also ensuring the relative stability of the salt concentration in the soil, effectively solving problems such as salt stress caused by salt migration during the crop production process in saline-alkali farmland, contributing to water conservation, salt stabilization, and yield promotion in saline-alkali farmland, and providing technical support for promoting the sustainable production and high-quality development of saline-alkali farmland. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0042] Figure 1 is a schematic flowchart of the method for irrigating crops in saline-alkali farmland provided by the present invention.

[0043] Figure 2 is a schematic structural diagram of the device for irrigating crops in saline-alkali farmland provided by the present invention.

[0044] Figure 3 is a schematic structural diagram of the electronic device provided by the present invention.

[0045] Figure 4 is a schematic structural diagram of the system for irrigating crops in saline-alkali farmland provided by the present invention.

[0046] Figure 5 is a schematic structural diagram of the profile soil salt testing subsystem in the system for irrigating crops in saline-alkali farmland provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0048] In the description of the invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the description of the present application, the terms "first", "second", etc. are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, in the description of the present application, " / " means at least one of the connected objects, and the character " / " generally means that the associated objects before and after are in an "or" relationship.

[0050] It should be noted that unreasonable irrigation in saline-alkali farmland is extremely likely to cause the migration and accumulation of deep salts to the surface soil and large fluctuations in the soil salinity of the root layer. When the soil salinity in the soil surface or root layer accumulates too high, it will seriously reduce the soil quality, lead to crop yield reduction, and even cause ecological imbalance. Therefore, reducing the migration and accumulation of deep salts to the surface soil and maintaining the relative stability of the root layer salinity during the crop growth process are the key influencing factors for reducing the salt stress of crops in saline-alkali farmland and promoting the healthy growth of crops.

[0051] In the related art, the traditional irrigation methods for crops in saline-alkali farmland mainly adopt technologies such as the soil moisture sensor method, the crop evapotranspiration model calculation method, and the water surface evaporation method to achieve the supply of crop water on demand and reduce the problem of secondary salinization caused by unreasonable irrigation. However, the above traditional irrigation methods for crops in saline-alkali farmland all take moisture as the control factor and the irrigation amount as the main control parameter, and the decision of the irrigation timing is also determined based on the soil moisture content or the cumulative irrigation amount, without considering factors such as crop type, soil depth, and soil salinity content, resulting in that the above traditional irrigation methods for crops in saline-alkali farmland cannot effectively control the migration and accumulation of soil salts in saline-alkali farmland to the surface soil.

[0052] In the related art, the traditional irrigation method for farmland crops in saline-alkali areas can also use flood irrigation to press and wash salts in the farmland of saline-alkali areas, thereby reducing the salt content in the surface soil of the farmland in saline-alkali areas. However, the above traditional irrigation method for farmland crops in saline-alkali areas comes at the cost of consuming a large amount of fresh water resources. It not only easily causes the rise of the groundwater level but also may further exacerbate the risk of soil secondary salinization, leading to a series of ecological environment problems.

[0053] Therefore, how to irrigate farmland crops in saline-alkali areas more reasonably and scientifically based on the soil salinity of the farmland in saline-alkali areas, so as to more effectively control the migration and accumulation of soil salts in the farmland of saline-alkali areas to the surface soil, reduce the impact of irrigation water on soil salts, and maintain the relative stability of soil salts in the root zone is an important technical guarantee for the sustainable production of farmland crops in saline-alkali areas.

[0054] The following will be combined with Figure 1 to describe the irrigation method for farmland crops in saline-alkali areas provided by the present invention.

[0055] Figure 1 is a schematic flowchart of the irrigation method for farmland crops in saline-alkali areas provided by the present invention. As Figure 1 shown, the method includes the following: Step 101, obtain the actual value of the soil salt storage in the target saline-alkali area farmland at the th time node during the current irrigation cycle of the target saline-alkali area farmland. The first time node during the current irrigation cycle is the starting moment of the current irrigation cycle, and the time interval between any two adjacent time nodes during the current irrigation cycle is the first preset duration, which represents a positive integer starting from 2.

[0056] It should be noted that the execution subject of the embodiments of the present invention is an irrigation device for farmland crops in saline-alkali areas. The above irrigation device for farmland crops in saline-alkali areas can be configured in electronic devices such as computers or servers.

[0057] Specifically, the target saline-alkali area farmland is the object of crop irrigation for the irrigation method of farmland crops in saline-alkali areas provided by the present invention. Among them, the farmland in saline-alkali areas refers to the farmland located in saline-alkali areas. Usually, the total salt content of the soil in the farmland in saline-alkali areas is greater than 0.1%.

[0058] It can be understood that the target saline-alkali area farmland can be determined based on actual needs. In the embodiments of the present invention, the target saline-alkali area farmland is not specifically limited.

[0059] It should be noted that the duration of the irrigation cycle of the target saline-alkali farmland can be determined according to factors such as the types of crops planted in the target saline-alkali farmland, the geographical location of the target saline-alkali farmland, and the climate conditions. For example, the irrigation cycle of the target saline-alkali farmland can be 30 days or 45 days. In the embodiments of the present invention, specific values of the duration of the irrigation cycle of the target saline-alkali farmland and the first preset duration are not specifically limited.

[0060] In the embodiments of the present invention, the first preset duration can be determined based on the growth period process of the target crop. Furthermore, based on the first preset duration, multiple time nodes can be determined within the current irrigation cycle of the target saline-alkali farmland. For example, when the target crop is in the seedling stage, the value range of the first preset duration can be 10 to 20 days; when the target crop is in the vigorous growth stage, the value range of the first preset duration can be 5 to 10 days; when the target crop is in the mature stage, the value of the first preset duration can be 7 to 14 days.

[0061] It can be understood that the end moment of the previous irrigation cycle of the target saline-alkali farmland is the start moment of the current irrigation cycle of the target saline-alkali farmland.

[0062] Correspondingly, when it is determined to enter the current irrigation cycle of the target saline-alkali farmland, it can be judged whether the preset duration has passed after the current moment from the th time node within the current irrigation cycle of the target saline-alkali farmland; where represents a positive integer starting from 2; the first time node within the current irrigation cycle of the target saline-alkali farmland is the start moment of the current irrigation cycle of the target saline-alkali farmland.

[0063] When it is determined that the preset duration has passed after the current moment from the th time node within the current irrigation cycle of the target saline-alkali farmland, it can be determined that the current moment is the th time node within the current irrigation cycle of the target saline-alkali farmland. The actual value of the soil salt storage of the target saline-alkali farmland at the th time node can be obtained through actual measurement, mathematical statistics, numerical calculation, etc. The target value of the soil salt storage of the target saline-alkali farmland at the th time node can also be obtained through numerical calculation, mathematical statistics, deep learning technology, etc. based on the basic parameters of the soil in the target saline-alkali farmland.

[0064] It should be noted that the soil salt storage of the saline-alkali farmland is used to describe the total amount of salt contained in the soil of the saline-alkali farmland. When the soil salt storage of the saline-alkali farmland is the target value of the soil salt storage of the above-mentioned saline-alkali farmland, it is most beneficial to the growth of the crops planted in the above-mentioned saline-alkali farmland.

[0065] As an optional embodiment, before obtaining the target value of the soil salt storage in the target saline-alkali farmland at the th time node based on the basic parameters of each soil layer in the target saline-alkali farmland, the method further includes: determining the target soil depth corresponding to the target saline-alkali farmland based on the type of the target crop planted in the target saline-alkali farmland.

[0066] Specifically, in the embodiments of the present invention, the theoretical depth that the roots of the above crops can reach during the growth period can be determined as the target soil depth corresponding to the target saline-alkali farmland based on the type of the crops planted in the target saline-alkali farmland.

[0067] For example, when the crop planted in the target saline-alkali farmland is a shallow-rooted crop, the theoretical depth that the roots of the above crops can reach during the growth period is usually 100 cm. Correspondingly, the target soil depth corresponding to the target saline-alkali farmland is 100 cm. When the crop planted in the target saline-alkali farmland is a deep-rooted crop, the theoretical depth that the roots of the above crops can reach during the growth period can reach 200 cm. Correspondingly, the target soil depth corresponding to the target saline-alkali farmland is 200 cm.

[0068] Preferably, the target soil depth corresponding to wheat planted in the saline-alkali farmland is 160 cm, the target soil depth corresponding to sunflower planted in the saline-alkali farmland is 200 cm, and the target soil depth corresponding to sugar beet planted in the saline-alkali farmland is 100 cm. The basic soil parameter is soil bulk density.

[0069] Based on the target soil depth, the soil in the target saline-alkali farmland is divided into a target number of layers.

[0070] Specifically, in order to improve the accuracy of crop irrigation in the target saline-alkali farmland, in the embodiments of the present invention, the soil in the target saline-alkali farmland can be divided into multiple layers based on the target soil depth, so that it can be determined whether crop irrigation needs to be performed on the target crop planted in the target saline-alkali farmland based on the basic parameters of each soil layer in the target saline-alkali farmland.

[0071] It should be noted that in the embodiments of the present invention, the depth of each soil layer in the target saline-alkali farmland can be determined based on prior knowledge and / or actual conditions (such as the target soil depth corresponding to the target saline-alkali farmland) . For example, the depth of each soil layer in the target saline-alkali farmland can be 20 cm.

[0072] Correspondingly, in the embodiments of the present invention, the target number can be determined based on the target soil depth corresponding to the target saline-alkali farmland and the pre-defined depth of each soil layer in the target saline-alkali farmland ​ , and then the soil body in the target saline-alkali farmland can be divided into layers.

[0073] Preferably, in the embodiment of the present invention, the soil bulk density of each layer of soil body in the target saline-alkali farmland can be measured by the cutting ring method.

[0074] Obtain the basic parameters of each layer of soil body in the target saline-alkali farmland.

[0075] Specifically, after dividing the soil body in the target saline-alkali farmland into layers, the soil bulk density of the th layer of soil body in the target saline-alkali farmland and the soil depth of each layer can be obtained through on-site measurement and prior knowledge as the basic parameters of the th layer of soil body in the target saline-alkali farmland. Among them, . .

[0076] It should be noted that after obtaining the basic parameters of the th layer of soil body in the target saline-alkali farmland, there is no need to obtain them again during the current irrigation cycle.

[0077] As an optional embodiment, the target value of the soil salt storage in the target saline-alkali farmland is obtained based on the following steps: Obtain the soil conductivity value of each layer of soil body in the target saline-alkali farmland after standard temperature correction before the target crop is planted in the target saline-alkali farmland. Specifically, for the th layer of soil body in the target saline-alkali farmland, in the embodiment of the present invention, the soil conductivity value of the th layer of soil body in the target saline-alkali farmland can be obtained by testing the profile soil extract of the th layer of soil body in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland .

[0078] Among them, soil conductivity (EC) is an index for measuring soil water-soluble salts, which reflects the total amount of salt ions in the soil and is an important factor for judging whether the salt ions in the soil limit crop growth.

[0079] Preferably, in the embodiment of the present invention, the soil conductivity value of the th layer of soil body in the target saline-alkali farmland can be obtained one day before the target crop is planted in the target saline-alkali farmland .

[0080] Preferably, the soil conductivity value of the th layer of soil body in the target saline-alkali farmland one day before the target crop is planted in the target saline-alkali farmland , it can be obtained by taking soil samples with an auger, sieving, mixing with a water-soil ratio, and then measuring with a conductivity meter.

[0081] Obtain the soil conductivity value of the layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland After that, the soil conductivity value of the layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland can be corrected to obtain the soil conductivity value of the layer of soil in the target saline-alkali farmland after standard temperature correction before the target crop is planted in the target saline-alkali farmland .

[0082] It should be noted that the soil conductivity value after the soil layer is corrected to the standard temperature refers to the soil conductivity value of the above-mentioned soil layer at the above-mentioned standard temperature. Since soil conductivity is affected by temperature, the conductivity values measured at different temperatures will be different. To compare and standardize the measurement results, it is usually necessary to correct the soil conductivity value to the standard temperature. Usually, the standard temperature is 25 °C.

[0083] The temperature correction of soil conductivity is usually based on the linear relationship between conductivity and temperature.

[0084] Based on the soil conductivity value of each layer of soil in the target saline-alkali farmland after standard temperature correction before the target crop is planted in the target saline-alkali farmland, obtain the soil salt content of each layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland.

[0085] Specifically, for the layer of soil in the target saline-alkali farmland, based on the soil conductivity value of the layer of soil in the target saline-alkali farmland after standard temperature correction before the target crop is planted in the target saline-alkali farmland , the soil salt content of the layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland can be calculated by the following formula :

[0086]

[0087] Among them, represents the conversion coefficient between soil salt content and soil conductivity after standard temperature correction; The value of

[0088] Based on the soil salt content of each soil layer in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland and the basic parameters of each soil layer in the target saline-alkali farmland, calculate the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland.

[0089] Specifically, after obtaining the soil salt content of the th soil layer in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland it is possible to calculate, based on the soil salt content of the th soil layer in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland and the basic parameters of the th soil layer in the target saline-alkali farmland, the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland through the following formula :

[0090]

[0091] Based on the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland, calculate the target value of the soil salt storage in the target saline-alkali farmland at the th time node.

[0092] Specifically, after calculating the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland it is possible to calculate the target value of the soil salt storage in the target saline-alkali farmland through the following formula :

[0093]

[0094] where represents the salt control coefficient; the value of the salt control coefficient is determined according to the type of the planted crop and prior knowledge. For example, when the planted crop is wheat, the salt tolerance of wheat is weak, and the value range of the salt control coefficient is less than 0.1; when the planted crop is sunflower, the salt tolerance of sunflower is strong, and the value range of the salt control coefficient can be from 0.1 to 0.2.

[0095] Preferably, the salt control coefficient .

[0096] As an optional embodiment, obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node during the current irrigation cycle of the target saline-alkali farmland includes: obtaining the The electrical conductivity value of the soil solution in each layer of soil in the target saline-alkali farmland at a time node.

[0097] Based on the electrical conductivity value of the soil solution in each layer of soil in the target saline-alkali farmland at a time node and the basic parameters of each layer of soil in the target saline-alkali farmland, calculate the actual value of the soil salt storage in the target saline-alkali farmland at the time node.

[0098] Specifically, for the layer of soil in the target saline-alkali farmland, in order to achieve real-time acquisition of soil salt content and reduce the damage to the farmland soil structure and the impact on the growth of planted crops, in the embodiments of the present invention, the layer of soil in the target saline-alkali farmland can be subjected to in-situ testing of the profile soil solution to obtain the electrical conductivity value of the soil solution in the layer of soil in the target saline-alkali farmland at a time node .

[0099] Among them, the profile soil solution is the liquid phase part in the soil, mainly composed of water, soluble salts, nutrients, etc. The profile soil solution test is an important link in soil physical and chemical analysis, used to measure the content and form of dissolved minerals, organic substances, trace elements, etc. in the soil, as well as to understand the physical and chemical properties such as the pH value and electrical conductivity of the soil solution. The test methods of the profile soil solution test mainly include: atomic electrode method, conductivity method, and electrochemical method, etc.

[0100] Based on the electrical conductivity value of the soil solution in the layer of soil in the target saline-alkali farmland at a time node , the soil salt content in the layer of soil in the target saline-alkali farmland at a time node can be calculated through the following formula : :

[0101]

[0102] Among them, represents the conversion coefficient between the soil salt content and the electrical conductivity of the soil solution; The value of

[0103] After obtaining the soil salt content in the layer of soil in the target saline-alkali farmland at a time node , the following formula can be used to calculate the : The actual value of the soil salt storage in the target saline-alkali farmland at a time node :

[0104] 。

[0105] It should be noted that in the embodiments of the present invention, the soil conductivity value of the -layer soil body in the target saline-alkali farmland one day before the target crop is planted in the target saline-alkali farmland is obtained , and the target value of the soil salt storage in the target saline-alkali farmland is calculated . Before the target crop is planted in the target saline-alkali farmland, the soil salt content of the target saline-alkali farmland can be more accurately determined based on solid soil by means of soil sampling, sieving, sieving, and mixing with a water-soil ratio. Taking soil before the target crop is planted in the target saline-alkali farmland will not affect the growth of the target crop and the planting soil in the target saline-alkali area.

[0106] Moreover, in the embodiments of the present invention, the soil conductivity value of the -layer soil body in the target saline-alkali farmland one day before the target crop is planted in the target saline-alkali farmland is obtained , and the target value of the soil salt storage in the target saline-alkali farmland is calculated , which can avoid repetitive work and synchronize the soil bulk density test, reduce labor intensity, and improve work efficiency.

[0107] In the embodiments of the present invention, when obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node , in-situ extraction of soil solution is used to obtain the soil solution conductivity value of the th time node in the -layer soil body in the target saline-alkali farmland , which can realize the real-time detection of the soil solution conductivity value of any layer of soil in the target saline-alkali farmland without damaging the soil structure in the target saline-alkali farmland and affecting the growth of the target crop.

[0108] In the embodiments of the present invention, the soil conductivity test method is used to obtain the soil conductivity value of the -layer soil body in the target saline-alkali farmland , so as to more accurately obtain the target value of the soil salt storage in the target saline-alkali farmland . The soil solution determination method is adopted to obtain the actual value of the soil salt storage in the target saline-alkali farmland at the th time node , which can timely master the salt dynamics of the target saline-alkali farmland and facilitate more efficiently obtaining the th time node in the target saline-alkali farmland Soil solution conductivity value of the soil layer .

[0109] Step 102. When it is determined, based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland, that crop irrigation needs to be carried out on the target crop planted in the target saline-alkali farmland, based on the environmental data in the target saline-alkali farmland during the time period corresponding to the th time node, obtain the irrigation amount of the target saline-alkali farmland at the th time node. The time period corresponding to the th time node is the time period between the th time node and the th time node. The target value of the soil salt storage in the target saline-alkali farmland is obtained based on the basic parameters of each soil layer in the target saline-alkali farmland, and the basic parameters include soil bulk density and soil depth.

[0110] Specifically, after obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland , it is possible to determine whether crop irrigation needs to be carried out on the target crop planted in the target saline-alkali farmland based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland , by means of numerical calculation, mathematical statistics, deep learning technology, etc.

[0111] As an optional embodiment, determining whether crop irrigation needs to be carried out on the target crop planted in the target saline-alkali farmland based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland includes: when the actual value of the soil salt storage in the target saline-alkali farmland at the th time node is greater than the product of the target value of the soil salt storage in the target saline-alkali farmland and the salt target coefficient, it is determined that crop irrigation needs to be carried out on the target crop planted in the target saline-alkali farmland. The salt target coefficient is a coefficient used to control the soil salt content within a preset range, and the salt target coefficient is determined based on the type of crop and the texture characteristics of the soil.

[0112] Specifically, in the case of , it is determined that it is necessary to Perform crop irrigation on the target crops planted in the farmland of the target saline-alkali area within a preset duration after a certain time node; in case, determine that there is no need to perform crop irrigation on the target crops planted in the farmland of the target saline-alkali area between the th time node and the th time node.

[0113] Preferably, the value of the salt target coefficient is not greater than 10%.

[0114] Based on the actual value of the soil salt storage in the farmland of the target saline-alkali area at the th time node and the target value of the soil salt storage in the farmland of the target saline-alkali area, when it is determined that crop irrigation needs to be performed on the target crops planted in the farmland of the target saline-alkali area, the irrigation amount of the farmland of the target saline-alkali area can be obtained by means of numerical calculation, mathematical statistics, deep learning calculation, etc. based on the environmental data and historical irrigation data in the farmland of the target saline-alkali area.

[0115] As an optional embodiment, based on the environmental data in the farmland of the target saline-alkali area during the period corresponding to the th time node, obtain the irrigation amount of the farmland of the target saline-alkali area at the th time node, including: calculating the crop coefficient correction value corresponding to the th time node based on the average daily wind speed at the target height in the farmland of the target saline-alkali area, the average of the daily minimum relative humidity, and the average plant height of the crops planted in the farmland of the target saline-alkali area during the period corresponding to the th time node.

[0116] Specifically, in the embodiments of the present invention, sensors such as anemometers can be used to obtain the average daily wind speed at the target height in the farmland of the target saline-alkali area during the period corresponding to the th time node (m / s).

[0117] In the embodiments of the present invention, sensors such as hygrometers can also be used to obtain the average of the daily minimum relative humidity in the farmland of the target saline-alkali area during the period corresponding to the th time node (%).

[0118] In the embodiments of the present invention, sensors such as height sensors can also be used to obtain the average plant height of the target crops during the period corresponding to the th time node (m).

[0119] Obtain the The average daily wind speed at the target height in the target saline-alkali farmland during the time period corresponding to each time node , the average value of the daily minimum relative humidity and the average plant height of the target crops planted in the target saline-alkali farmland After that, based on the following formula, the crop coefficient correction value corresponding to the th time node can be calculated :

[0120]

[0121] Among them, represents the crop coefficient recommended by the Food and Agriculture Organization of the United Nations (FAO). The crop coefficient is used to describe the ratio of the water requirement of the crop to the potential evapotranspiration during different growth stages. The value of the crop coefficient is the ratio of the crop water requirement and the reference water requirement ; the value of the crop water requirement can be obtained through experiments, and the value of the reference water requirement can be calculated using an empirical formula based on local meteorological data. For example, the values of sunflowers in the initial, middle, and late growth stages are 0.3, 1.0 - 1.15, and 0.35 respectively

[0122] Based on the crop coefficient correction value corresponding to the th time node and the reference crop evapotranspiration of the target saline-alkali farmland at the th time node, calculate the irrigation amount of the target saline-alkali farmland at the th time node

[0123] Specifically, the crop coefficient correction value corresponding to the th time node , through the following formula, the irrigation amount of the target saline-alkali farmland at the th time node can be calculated :

[0124]

[0125] Among them, represents the reference crop evapotranspiration of the target saline-alkali farmland at the th time node; represents the salt leaching coefficient; represents the irrigation water use coefficient. The reference crop evapotranspiration of the target saline-alkali farmland at the th time node can be calculated based on the P - M formula recommended by FAO - 56

[0126] Salt leaching coefficient , which refers to the increased irrigation amount corresponding to leaching the salt below the soil depth (for example, a depth of 100 cm). The salt leaching coefficient is usually determined according to the crop type and prior knowledge.

[0127] Preferably, the value range of the salt leaching coefficient is from 0.2 to 0.4.

[0128] Irrigation water use coefficient refers to the ratio of the effective water volume irrigated in the field to the water volume introduced at the canal head, and can be used to reflect the seepage losses of irrigation canals at all levels in the irrigation area. The irrigation water use coefficient can be determined based on prior knowledge and / or actual conditions.

[0129] Preferably, the value of the irrigation water use coefficient is 0.9.

[0130] Step 103, perform crop irrigation on the target crop planted in the target saline-alkali area farmland based on the irrigation amount of the target saline-alkali area farmland at the th time node, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali area farmland at the th time node in the current irrigation cycle of the target saline-alkali area farmland.

[0131] Specifically, after obtaining the irrigation amount of the target saline-alkali area farmland at the th time node , crop irrigation can be performed on the target crop planted in the target saline-alkali area farmland within the second preset duration after the th time node, and the irrigation amount is the irrigation amount of the target saline-alkali area farmland at the th time node .

[0132] It should be noted that the second preset duration in the embodiments of the present invention can be determined based on prior knowledge and / or actual conditions. For example, the value range of the second preset duration can be from 12 hours to 24 hours. The present invention does not make specific limitations on the value of the second preset duration.

[0133] Based on the irrigation amount of the target saline-alkali area farmland at the th time node after performing crop irrigation on the target crop planted in the target saline-alkali area farmland, increase by 1, and return to execute the step of obtaining the Steps for obtaining the actual value of the soil salt storage in the target saline-alkali farmland at a time node.

[0134] As an optional embodiment, after obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node during the current irrigation cycle of the target saline-alkali farmland, the method further includes: when it is determined, based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland, that no crop irrigation is required for the target crops planted in the target saline-alkali farmland, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node during the current irrigation cycle of the target saline-alkali farmland.

[0135] In an embodiment of the present invention, after obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node during the current irrigation cycle of the target saline-alkali farmland, and obtaining the target value of the soil salt storage in the target saline-alkali farmland at the th time node based on the basic parameters of each layer of soil in the target saline-alkali farmland, when it is determined, based on the actual value of the soil salt storage in the target saline-alkali farmland at the th time node and the target value of the soil salt storage in the target saline-alkali farmland, that crop irrigation is required for the target crops planted in the target saline-alkali farmland, based on the environmental data in the target saline-alkali farmland during the period corresponding to the th time node, obtain the irrigation amount of the target saline-alkali farmland at the th time node, and then, based on the irrigation amount of the target saline-alkali farmland at the th time node, perform crop irrigation on the target crops planted in the target saline-alkali farmland within the second preset duration after the th time node, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the th time node during the current irrigation cycle of the target saline-alkali farmland, which can irrigate the target saline-alkali farmland more scientifically and reasonably based on the soil salt storage in the target saline-alkali farmland, not only meet the on-demand supply of crop water in the target saline-alkali farmland, but also ensure the relative stability of the salt concentration in the soil, effectively solve problems such as salt stress caused by salt migration during the crop production process in saline-alkali farmland, contribute to water saving, salt stabilization and yield promotion in saline-alkali farmland, and can provide technical support for promoting the sustainable production and high-quality development of saline-alkali farmland.

[0136] Figure 2It is a schematic structural diagram of the farmland crop irrigation device in the saline-alkali area provided by the present invention. The following will be combined with Figure 2 to describe the farmland crop irrigation device in the saline-alkali area provided by the present invention. The farmland crop irrigation device in the saline-alkali area described below can be mutually corresponding and referred to the saline-alkali area farmland crop irrigation method provided by the present invention described above. As Figure 2 shown, the device includes: a data acquisition module 201, a data calculation module 202, and a cycle control module 203.

[0137] The data acquisition module 201 is used to obtain the actual value of the soil salt storage of the target saline-alkali area farmland at the th time node during the current irrigation cycle of the target saline-alkali area farmland. The first time node during the current irrigation cycle is the starting moment of the current irrigation cycle. The interval between any two adjacent time nodes during the current irrigation cycle is a first preset duration, which represents a positive integer starting from 2.

[0138] The data calculation module 202 is used to determine that crop irrigation needs to be performed on the target crops planted in the target saline-alkali area farmland based on the actual value of the soil salt storage of the target saline-alkali area farmland at the th time node and the target value of the soil salt storage of the target saline-alkali area farmland. Based on the environmental data in the target saline-alkali area farmland during the period corresponding to the th time node, obtain the irrigation amount of the target saline-alkali area farmland at the th time node. The period corresponding to the th time node is the period between the th time node and the th time node. The target value of the soil salt storage of the target saline-alkali area farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali area farmland. The basic parameters include soil bulk density and soil depth.

[0139] The cycle control module 203 is used to perform crop irrigation on the target crops planted in the target saline-alkali area farmland based on the irrigation amount of the target saline-alkali area farmland at the th time node, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage of the target saline-alkali area farmland at the th time node during the current irrigation cycle of the target saline-alkali area farmland.

[0140] Specifically, the data acquisition module 201, the data calculation module 202, and the cycle control module 203 are electrically connected.

[0141] In the farmland crop irrigation device in the saline-alkali area in the embodiment of the present invention, by obtaining the The actual value of the soil salt storage in the target saline-alkali farmland at a time node, and based on the basic parameters of each layer of soil in the target saline-alkali farmland, after obtaining the target value of the soil salt storage in the target saline-alkali farmland at the time node, then based on the actual value of the soil salt storage in the target saline-alkali farmland at the time node and the target value of the soil salt storage in the target saline-alkali farmland, when it is determined that crop irrigation needs to be carried out on the target crops planted in the target saline-alkali farmland, based on the environmental data in the target saline-alkali farmland during the period corresponding to the time node, obtain the irrigation amount of the target saline-alkali farmland at the time node, and then based on the irrigation amount of the target saline-alkali farmland at the time node, carry out crop irrigation on the target crops planted in the target saline-alkali farmland within the second preset duration after the time node. Increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the time node in the current irrigation cycle of the target saline-alkali farmland. It is possible to irrigate the target saline-alkali farmland more scientifically and reasonably based on the soil salt storage in the target saline-alkali farmland, which not only meets the on-demand supply of crop water in the target saline-alkali farmland, but also ensures the relative stability of the salt concentration in the soil, effectively solves problems such as salt stress caused by salt migration during the crop production process in saline-alkali farmland, helps to achieve water conservation, salt stabilization and yield promotion in saline-alkali farmland, and can provide technical support for promoting the sustainable production and high-quality development of saline-alkali farmland.

[0142] Figure 3 Illustrates a schematic physical structure diagram of an electronic device, as Figure 3 shown. The electronic device 3 may include: a processor 310, a communication interface 320, a memory 330, and a communication bus 340. Among them, the processor 310, the communication interface 320, and the memory 330 complete mutual communication through the communication bus 340. The processor 310 can call the logical instructions in the memory 330 to execute the crop irrigation method for saline-alkali farmland, and the method includes: obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the time node in the current irrigation cycle of the target saline-alkali farmland. The first time node in the current irrigation cycle is the starting moment of the current irrigation cycle, and the interval between any two adjacent time nodes in the current irrigation cycle is the first preset duration. represents a positive integer starting from 2; then based on the When determining the actual value of the soil salt storage in the target saline-alkali farmland at a time node and the target value of the soil salt storage in the target saline-alkali farmland, and it is determined that crop irrigation needs to be performed on the target crops planted in the target saline-alkali farmland, based on the environmental data in the target saline-alkali farmland during the time period corresponding to the time node, obtain the irrigation volume of the target saline-alkali farmland at the time node. The time period corresponding to the time node is the time period between the time node and the time node. The target value of the soil salt storage in the target saline-alkali farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali farmland. The basic parameters include soil bulk density and soil depth. Perform crop irrigation on the target crops planted in the target saline-alkali farmland based on the irrigation volume of the target saline-alkali farmland at the time node, increase by 1, and return to execute the step of obtaining the actual value of the soil salt storage in the target saline-alkali farmland at the time node in the current irrigation cycle of the target saline-alkali farmland.

[0143] In addition, when the logical instructions in the above-mentioned memory 330 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0144] Figure 4 is a schematic structural diagram of the crop irrigation system for saline-alkali farmland provided by the present invention. Based on the content of the above embodiments, as Figure 4 shown, a crop irrigation system for saline-alkali farmland includes: the electronic device 3, the profile soil salt test subsystem 1, the environmental information monitoring subsystem 2, and the irrigation control subsystem 4 as described above; the electronic device 3 is electrically connected to the profile soil salt test subsystem 1, the environmental information monitoring subsystem 2, and the irrigation control subsystem 4 respectively;

[0145] The profile soil salinity testing subsystem 1 is used to obtain the actual value of the soil body salinity storage in the target saline-alkali farmland at the th time node during the current irrigation cycle of the target saline-alkali farmland, and send the obtained actual value of the soil body salinity storage in the target saline-alkali farmland at the th time node during the current irrigation cycle to the electronic device 3;

[0146] The environmental information monitoring subsystem 2 is used to obtain the environmental data in the target saline-alkali farmland during the time period corresponding to the th time node, and send the obtained environmental data in the target saline-alkali farmland during the time period corresponding to the th time node to the electronic device 3;

[0147] The irrigation control subsystem 4 is used to control the irrigation equipment to irrigate the target crops planted in the target saline-alkali area based on the irrigation amount of the target saline-alkali farmland at the th time node sent by the electronic device 3.

[0148] Specifically, the profile soil salinity testing subsystem 1 can be used to detect the actual value of the soil body salinity storage in the target saline-alkali farmland in real time and determine the change range of the soil body salinity content in the target saline-alkali farmland.

[0149] The environmental information monitoring subsystem 2 can be used to monitor the meteorological information of the growth environment of the target crops planted in the target saline-alkali farmland in real time, including parameters such as solar radiation, air temperature, relative humidity, and wind speed.

[0150] The irrigation control subsystem 4 controls the irrigation of the crops in the target saline-alkali farmland according to the decision result of the electronic device 3.

[0151] Figure 5 is a schematic structural diagram of the profile soil salinity testing subsystem in the crop irrigation system for saline-alkali farmland provided by the present invention. As Figure 5 shown, the profile soil salinity testing subsystem 1 can be composed of a profile soil liquid extraction device 11, a liquid testing device 12, a gas buffer device 13, and a power system 14.

[0152] The profile soil liquid extraction device 11 is connected to the liquid testing device 12 through a first pipeline 15.

[0153] Preferably, the number of the profile soil liquid extraction devices 11 on the same point profile is not less than 5.

[0154] The liquid testing device 12 is connected to the gas buffer device 13 through a second pipeline 18.

[0155] Preferably, a conductivity sensor 16 is installed in the liquid testing device 12 for testing the conductivity value of the soil liquid.

[0156] Preferably, a liquid discharge port 17 is provided at the bottom of the liquid testing device 12 and is automatically controlled by a valve.

[0157] The gas buffer device 13 is connected to the power system 14 through a third pipeline 19. The gas buffer device 13 is used to buffer the gas pressure so that the solution in the soil layer can continuously and stably enter the liquid testing device 12; the power system 14 can provide a vacuum pump force to make the entire pipeline in a negative pressure state so that the liquid in the soil can automatically enter the liquid testing device 12 under the action of the pressure difference.

[0158] Optionally, the irrigation control subsystem 4 in the embodiments of the present invention may be composed of a head control system, a flow monitoring system, a field valve control system, an end irrigation system, etc.

[0159] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the saline-alkali area farmland crop irrigation method provided by the above-mentioned various methods. The method includes:

[0160] Obtain the actual value of the soil salt storage of the target saline-alkali area farmland at the th time node during the current irrigation cycle of the target saline-alkali area farmland. The first time node during the current irrigation cycle is the starting moment of the current irrigation cycle. The interval between any two adjacent time nodes during the current irrigation cycle is a first preset time period, which represents a positive integer starting from 2; when determining that crop irrigation needs to be performed on the target crop planted in the target saline-alkali area farmland based on the actual value of the soil salt storage of the target saline-alkali area farmland at the th time node and the target value of the soil salt storage of the target saline-alkali area farmland, based on the environmental data in the target saline-alkali area farmland during the time period corresponding to the th time node, obtain the irrigation amount of the target saline-alkali area farmland at the th time node. The time period corresponding to the th time node is the time period between the th time node and the th time node. The target value of the soil salt storage of the target saline-alkali area farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali area farmland. The basic parameters include soil bulk density and soil depth; perform crop irrigation on the target crop planted in the target saline-alkali area farmland based on the irrigation amount of the target saline-alkali area farmland at the th time node, Increment by 1, and return to execute the step of obtaining the actual value of the soil salt storage of the target saline-alkali farmland at the th time node within the current irrigation cycle of the target saline-alkali farmland.

[0161] On the other hand, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the crop irrigation method for saline-alkali farmland provided by the above-mentioned various methods. The method includes:

[0162] Obtain the actual value of the soil salt storage of the target saline-alkali farmland at the th time node within the current irrigation cycle of the target saline-alkali farmland. The first time node within the current irrigation cycle is the starting moment of the current irrigation cycle. The time interval between any two adjacent time nodes within the current irrigation cycle is the first preset duration, represents a positive integer starting from 2; based on the actual value of the soil salt storage of the target saline-alkali farmland at the th time node and the target value of the soil salt storage of the target saline-alkali farmland, when it is determined that crop irrigation needs to be performed on the target crop planted in the target saline-alkali farmland, based on the environmental data within the time period corresponding to the th time node in the target saline-alkali farmland, obtain the irrigation amount of the target saline-alkali farmland at the th time node. The time period corresponding to the th time node is the time period between the th time node and the th time node. The target value of the soil salt storage of the target saline-alkali farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali farmland. The basic parameters include soil bulk density and soil depth; perform crop irrigation on the target crop planted in the target saline-alkali farmland based on the irrigation amount of the target saline-alkali farmland at the th time node, Increment by 1, and return to execute the step of obtaining the actual value of the soil salt storage of the target saline-alkali farmland at the th time node within the current irrigation cycle of the target saline-alkali farmland.

[0163] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement without creative efforts.

[0164] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for irrigating crops in saline-alkali areas, characterized in that: include: Get the current irrigation cycle of the target saline-alkali area farmland. The actual value of the soil salt reserve of the target saline-alkali area farmland at a time node, the first time node in the current irrigation cycle is the starting time of the current irrigation cycle, and the interval between any two adjacent time nodes in the current irrigation cycle is a first preset time length, Indicates a positive integer with a starting value of 2; Based on the In the case where it is determined that the target crop planted in the target saline-alkali farmland needs to be irrigated based on the actual value of the soil salt reserve of the target saline-alkali farmland at the first time point and the target value of the soil salt reserve of the target saline-alkali farmland, the target crop planted in the target saline-alkali farmland needs to be irrigated based on the first time point. The environmental data of the target saline-alkali farmland in the time period corresponding to the time node is obtained. The irrigation volume of the target saline-alkali area farmland at the time point, The time period corresponding to the time node is The time node is related to the During the period between the time nodes, the target value of the soil salt reserve of the target saline-alkali farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali farmland, wherein the basic parameters include soil bulk density and soil depth; Based on the The target crops planted in the target saline-alkali farmland are irrigated according to the irrigation amount of the target saline-alkali farmland at each time point. Increase by 1, return to the current irrigation cycle of the target saline-alkali area farmland. The steps of calculating the actual value of soil salt reserves of farmland in the target saline-alkali area at a time node; The target value of soil salt reserves of the target saline-alkali area farmland is obtained based on the following steps: Obtaining the soil conductivity value of each layer of soil in the target saline-alkali farmland after being corrected by standard temperature before the target crop is planted in the target saline-alkali farmland; Based on the soil conductivity value of each layer of soil in the target saline-alkali farmland corrected by standard temperature before the target crop is planted in the target saline-alkali farmland, obtaining the soil salt content of each layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland; Calculate the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland based on the soil salt content of each layer of soil in the target saline-alkali farmland and the basic parameters of each layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland; Based on the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland, the first The target value of soil salt reserves in the target saline-alkali area farmland at the time node.

2. The method for irrigating crops in saline-alkali areas according to claim 1, characterized in that: The The environmental data of the target saline-alkali farmland in the time period corresponding to the time node is obtained. The irrigation volume of the target saline-alkali area farmland at each time point includes: Based on the The average daily wind speed at the target height of the target saline-alkali area farmland, the average daily minimum relative humidity and the average plant height of the target crop in the period corresponding to the time node are calculated. The crop coefficient correction value corresponding to each time node; Based on the The crop coefficient correction value corresponding to the time node and the The reference crop evapotranspiration of the target saline-alkali area farmland at the time node is calculated. The irrigation volume of the target saline-alkali area farmland at each time point.

3. The method for irrigating crops in saline-alkali areas according to claim 1, characterized in that: Based on the The actual value of the soil salt reserve of the target saline-alkali farmland at a time point and the target value of the soil salt reserve of the target saline-alkali farmland are used to determine whether it is necessary to irrigate the target crops planted in the target saline-alkali farmland, including: In the said When the actual value of the soil salt reserves of the target saline-alkali farmland at a time point is greater than the product of the target value of the soil salt reserves of the target saline-alkali farmland and the salt target coefficient, it is determined that crop irrigation is needed for the target crops planted in the target saline-alkali farmland, and the salt target coefficient is determined based on the type of crop and the texture characteristics of the soil.

4. The method for irrigating crops in saline-alkali areas according to claim 1, characterized in that: Get the current irrigation cycle of the target saline-alkali area farmland. The actual value of soil salt reserves in the target saline-alkali area farmland at each time point, including: Get the The soil conductivity value of each layer of soil in the target saline-alkali area farmland at each time point; Based on the The soil conductivity value of each layer of soil in the target saline-alkali farmland at the time node and the basic parameters of each layer of soil in the target saline-alkali farmland are calculated. The actual value of soil salt reserves in the target saline-alkali area farmland at each time node.

5. The method for irrigating crops in saline-alkali areas according to claim 1, characterized in that: The target saline-alkali area farmland is obtained in the current irrigation cycle Before the actual value of the soil salt reserve of the target saline-alkali area farmland at a time node, the method further includes: Based on the type of the target crop, determining the target soil depth corresponding to the target saline-alkali area farmland; Based on the target soil depth, the soil in the target saline-alkali area farmland is divided into a target number of layers; Obtain the basic parameters of each layer of soil in the target saline-alkali area farmland.

6. The method for irrigating crops in saline-alkali areas according to any one of claims 1 to 5, characterized in that: The target saline-alkali area farmland is obtained in the current irrigation cycle After determining the actual value of soil salt reserves of the target saline-alkali area farmland at a time node, the method further comprises: Based on the The actual value of the soil salt reserve of the target saline-alkali farmland at a time point and the target value of the soil salt reserve of the target saline-alkali farmland are used to determine that there is no need to irrigate the target crops planted in the target saline-alkali farmland. Increase by 1, return to the current irrigation cycle of the target saline-alkali area farmland. Steps to calculate the actual value of soil salt reserves in the target saline-alkali area farmland at each time node.

7. A device for irrigation of crops in saline-alkali areas, characterized in that: include: The data acquisition module is used to obtain the current irrigation cycle of the target saline-alkali area farmland. The actual value of the soil salt reserve of the target saline-alkali area farmland at a time node, the first time node in the current irrigation cycle is the starting time of the current irrigation cycle, and the interval between any two adjacent time nodes in the current irrigation cycle is a first preset time length, Indicates a positive integer with a starting value of 2; A data calculation module is used to calculate the In the case where it is determined that the target crop planted in the target saline-alkali farmland needs to be irrigated based on the actual value of the soil salt reserve of the target saline-alkali farmland at the first time point and the target value of the soil salt reserve of the target saline-alkali farmland, the target crop planted in the target saline-alkali farmland needs to be irrigated based on the first time point. The environmental data of the target saline-alkali farmland in the time period corresponding to the time node is obtained. The irrigation volume of the target saline-alkali area farmland at the time point, The time period corresponding to the time node is The time node is related to the During the period between the time nodes, the target value of the soil salt reserve of the target saline-alkali farmland is obtained based on the basic parameters of each layer of soil in the target saline-alkali farmland, wherein the basic parameters include soil bulk density and soil depth; A loop control module is used to The target crops planted in the target saline-alkali farmland are irrigated according to the irrigation amount of the target saline-alkali farmland at each time point. Increase by 1, return to the current irrigation cycle of the target saline-alkali area farmland. The steps of calculating the actual value of soil salt reserves of farmland in the target saline-alkali area at a time node; The target value of soil salt reserves of the target saline-alkali area farmland is obtained based on the following steps: Obtaining the soil conductivity value of each layer of soil in the target saline-alkali farmland after being corrected by standard temperature before the target crop is planted in the target saline-alkali farmland; Based on the soil conductivity value of each layer of soil in the target saline-alkali farmland corrected by standard temperature before the target crop is planted in the target saline-alkali farmland, obtaining the soil salt content of each layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland; Calculate the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland based on the soil salt content of each layer of soil in the target saline-alkali farmland and the basic parameters of each layer of soil in the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland; Based on the cumulative salt content of the target saline-alkali farmland before the target crop is planted in the target saline-alkali farmland, the first The target value of soil salt reserves in the target saline-alkali area farmland at the time node.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for irrigating farmland crops in saline-alkali areas as described in any one of claims 1 to 6 is implemented.

9. A saline-alkali area farmland crop irrigation system, characterized in that: include: The electronic device, the profile soil salinity testing subsystem, the environmental information monitoring subsystem and the irrigation control subsystem according to claim 8; the electronic device is electrically connected to the profile soil salinity testing subsystem, the environmental information monitoring subsystem and the irrigation control subsystem respectively; The profile soil salinity test subsystem is used to obtain the first The actual value of the soil salt reserve of the target saline-alkali farmland at the time node, and the obtained value of the first irrigation cycle of the target saline-alkali farmland in the current irrigation cycle The actual value of the soil salt reserve of the target saline-alkali area farmland at a time node is sent to the electronic device; The environmental information monitoring subsystem is used to obtain the The environmental data of the target saline-alkali farmland in the period corresponding to the time node, and the obtained The environmental data of the farmland in the target saline-alkali area during the time period corresponding to the time node is sent to the electronic device; The irrigation control subsystem is used to control the irrigation control subsystem based on the first The irrigation amount of the target saline-alkali area farmland at a time node is controlled to control the irrigation equipment to irrigate the crops in the target saline-alkali area farmland.

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