Irrigation control method and system based on typical sand fixation plant water demand rule

Abstract

The invention discloses an irrigation control method and system based on a typical sand-fixing plant water demand rule, and relates to the technical field of irrigation control, and the method comprises the steps: collecting sand-fixing plant information and external factor data in real time, and building a water demand rule model of sand-fixing plants according to the collected sand-fixing plant information; the rainfall water collection efficiency of the photovoltaic field area is analyzed by using the collected external factor data, and the water collection efficiency under different rainfall intensities is quantified; dynamically adjusting the irrigation amount, time and frequency according to the water demand rule model, soil humidity and rainfall water collection efficiency data of the sand-fixing plants in combination with rainfall water collection data, meteorological information and plant water demand data which are acquired in real time; and an irrigation control strategy is fed back and adjusted by evaluating plant growth, yield and water resource utilization efficiency. According to the invention, sand stabilization plants in the photovoltaic electric field are irrigated as required in a drought environment, so that water resource waste caused by excessive irrigation is avoided, and plant growth limitation caused by insufficient irrigation is also prevented.

Description

Technical Field

[0001] The invention relates to the technical field of irrigation control, in particular to an irrigation control method and system based on the water demand law of typical sand-fixing plants. Background Art

[0002] With the intensification of global environmental changes and desertification problems, how to use limited water resources to effectively prevent and control desertification and promote ecological restoration has become an urgent problem that needs to be solved. Photovoltaic power generation technology, as a green energy, has been widely used in energy production and environmental protection around the world. In recent years, with the continuous construction of desert photovoltaic power plants, its application potential in desert ecological restoration has received widespread attention. However, the water resource management problem of photovoltaic power plants under extreme climatic conditions is still a big challenge. Due to the scarcity of water resources in desert areas, traditional irrigation methods often rely on external water sources, and the lack of these water sources greatly reduces the feasibility of irrigation through external water sources. Therefore, how to efficiently collect and utilize precipitation without external water sources has become an important technical problem for desert photovoltaic power plants to prevent desertification, maintain vegetation growth and improve economic benefits.

[0003] In response to this problem, existing technical research mainly focuses on the optimization of water-saving irrigation systems, plant water demand patterns, and precipitation collection systems in photovoltaic fields. Traditional photovoltaic panel precipitation collection systems usually have problems such as low precipitation collection efficiency and insufficient resource utilization, and cannot fully meet the water resource needs of desert area ecological restoration and photovoltaic field operation. In addition, the existing sand-fixing plant irrigation mode is mainly based on traditional irrigation methods, lacking comprehensive consideration of different plant types, different growth stages, and external climatic conditions, which often leads to a large gap between irrigation volume and actual demand, resulting in waste or shortage of water resources. Although some studies have attempted to achieve intelligent and precise irrigation by real-time monitoring of soil moisture and meteorological data through Internet of Things technology, these studies often fail to effectively combine precipitation collection systems with plant water demand patterns, resulting in the accuracy and efficiency of irrigation regulation being still not ideal, especially in extreme environments such as deserts. The matching problem between precipitation collection volume and actual plant water demand still needs to be solved.

[0004] Current technologies have not systematically addressed how to optimize the water demand of plants inside and outside photovoltaic power fields by combining efficient precipitation collection with precise irrigation control when there is no external water source. In terms of efficient precipitation collection, although some photovoltaic precipitation collection devices have been developed to improve collection efficiency, existing technologies generally ignore multiple factors that affect the efficiency of precipitation collection, such as the tilt angle, cleanliness, and surface smoothness of photovoltaic panels, resulting in insufficient optimization of water collection efficiency under different climatic conditions. At the same time, research on the water demand patterns, transpiration water consumption, and growth characteristics of different types of sand-fixing plants is still in its early stages, and there is a lack of special irrigation solutions for plants in desert photovoltaic power fields. Therefore, existing technologies have not yet achieved efficient use of precipitation and precise matching of plant water demand in the windbreak and sand fixation system of desert photovoltaic power fields.

[0005] The present invention improves the efficient precipitation collection system of photovoltaic panels and studies the water demand patterns of sand-fixing plants. This model quantifies the water collection efficiency under different precipitation conditions, combines the transpiration water consumption characteristics of plants and soil moisture changes, and dynamically optimizes the irrigation pattern of sand-fixing plants to accurately meet the water needs of vegetation inside and outside the photovoltaic field. Summary of the invention

[0006] In view of the above-mentioned problems, the present invention is proposed.

[0007] Therefore, the problem to be solved by the present invention is: how to solve the problem that the existing method fails to fully utilize limited precipitation resources in desert photovoltaic fields, resulting in insufficient plant irrigation or waste of water resources.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: an irrigation control method based on the water requirement law of typical sand-fixing plants, including: real-time collection of sand-fixing plant information and external factor data, and establishing a water requirement law model of sand-fixing plants based on the collected sand-fixing plant information; using the collected external factor data to analyze the precipitation and water collection efficiency in the photovoltaic field area, and quantify the water collection efficiency under different precipitation intensities; dynamically adjusting the irrigation amount, time and frequency based on the water requirement law model of sand-fixing plants, soil moisture and precipitation and water collection efficiency data, combined with real-time acquired precipitation and water collection data, meteorological information and plant water requirement data; and feedback adjusting the irrigation control strategy through evaluation of plant growth, yield and water resource utilization efficiency.

[0009] As a preferred scheme of the irrigation control method based on the water requirement law of typical sand-fixing plants described in the present invention, the real-time collection of sand-fixing plant information and external factor data includes installing a plant stem liquid flow observation system, a soil moisture sensor and a photovoltaic field precipitation collection device to collect real-time sand-fixing plant growth stage information, soil moisture, meteorological data, precipitation collection data and historical irrigation data.

[0010] As a preferred scheme of the irrigation control method based on the water requirement law of typical sand-fixing plants described in the present invention, wherein: the establishment of the water requirement law model of sand-fixing plants includes analyzing the relationship of plant water requirement, and the relationship of plant water requirement includes the relationship between plant transpiration rate and meteorology, the relationship between plant water requirement and growth stage, and the relationship between root depth and soil moisture; the relationship between plant transpiration rate and meteorology includes calculating the transpiration rate of plants using the transpiration rate model Penman-Monteith equation by analyzing temperature, humidity, and solar radiation meteorological factors; the relationship between plant water requirement and growth stage includes that the water requirement varies according to the different growth stages of plants; the relationship between root depth and soil moisture includes obtaining the moisture conditions of each layer of the soil through soil moisture sensor data, and establishing a relationship with the water absorption capacity of the root system; multiple regression analysis is used to establish a mathematical relationship between the water requirement of plants and meteorological factors, the growth stage of plants and soil moisture to obtain the actual water requirement of sand-fixing plants.

[0011] As a preferred scheme of the irrigation control method based on the water requirement law of typical sand-fixing plants described in the present invention, wherein: the precipitation water collection efficiency of the photovoltaic field area includes analyzing the factors affecting the precipitation water collection efficiency, and the factors affecting the precipitation water collection efficiency include precipitation intensity, photovoltaic panel inclination angle, photovoltaic panel surface cleanliness and smoothness and evaporation loss; according to different precipitation intensities, the water collection efficiency is evaluated in combination with the actual situation of the photovoltaic panel, if the precipitation intensity is low, the water collection efficiency is high, if the precipitation intensity is high, the water collection efficiency is low, if the photovoltaic panel inclination angle is small, the water collection efficiency is low, if the photovoltaic panel inclination angle is large, the water collection efficiency is high or low, if the photovoltaic panel inclination angle is moderate, the water collection efficiency is high, if the photovoltaic panel shows high cleanliness and smoothness, the water collection efficiency is high, if the photovoltaic panel shows low cleanliness and smoothness, the water collection efficiency is low; the quantification of the water collection efficiency under different precipitation intensities includes recording the precipitation and the actual amount of water collected under different precipitation intensities, and the collected data is used to analyze the water collection efficiency under different precipitation intensities.

[0012] As a preferred scheme of the irrigation control method based on the water requirement law of typical sand-fixing plants described in the present invention, the dynamic adjustment of irrigation amount, time and frequency includes setting a soil moisture threshold. If the soil moisture is less than or equal to the soil moisture threshold, it indicates that irrigation is needed. If the soil moisture is greater than the soil moisture threshold, irrigation is stopped. Combined with the precipitation collection efficiency data of the photovoltaic field area, the efficiency of the water collection system in collecting precipitation is judged. If the water collection efficiency is low, the irrigation amount is increased.

[0013] As a preferred scheme of the irrigation control method based on the water requirement law of typical sand-fixing plants described in the present invention, the dynamic adjustment of irrigation amount, time and frequency also includes that under the same conditions, if the soil moisture is low, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high; if the soil moisture is high, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low; if the plant water requirement is low, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low; if the plant water requirement is high, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high; if the precipitation water collection efficiency is low, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low; if the precipitation water collection efficiency is high, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high.

[0014] As a preferred scheme of the irrigation control method based on the water requirement law of typical sand-fixing plants described in the present invention, the feedback adjustment irrigation control strategy includes dynamically evaluating the water demand of plants and the effectiveness of irrigation strategies through real-time monitoring of plant growth, yield and water resource utilization efficiency WUE. If the WUE is low or the plant growth is poor, the irrigation amount is increased and the irrigation time and frequency are adjusted according to the feedback; if the plant growth is good and the WUE is high, the irrigation amount is reduced and the irrigation timing is optimized to improve the utilization efficiency of water resources; continuous monitoring and adjustment ensure that the irrigation strategy always matches the plant needs and environmental conditions, so as to maximize plant yield and water utilization efficiency.

[0015] Another object of the present invention is to provide a system for an irrigation control method based on the water demand law of typical sand-fixing plants, which can solve the irrigation control problem based on the water demand law of typical sand-fixing plants by constructing an irrigation control system.

[0016] To solve the above technical problems, the present invention provides the following technical solutions: an irrigation control system based on the water requirement law of typical sand-fixing plants, comprising a data acquisition module, a precipitation and water collection efficiency quantification module, an adjustment module and a feedback module; the data acquisition module is used to collect sand-fixing plant information and external factor data in real time, and establish a water requirement law model of sand-fixing plants according to the collected sand-fixing plant information; the precipitation and water collection efficiency quantification module uses the collected external factor data to analyze the precipitation and water collection efficiency in the photovoltaic field area, and quantify the water collection efficiency under different precipitation intensities; the adjustment module is used to dynamically adjust the irrigation amount, time and frequency according to the water requirement law model of sand-fixing plants, soil moisture and precipitation and water collection efficiency data, combined with real-time acquired precipitation and water collection data, meteorological information and plant water requirement data; the feedback module is used to feedback and adjust the irrigation control strategy through the evaluation of plant growth, yield and water resource utilization efficiency.

[0017] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the irrigation control method based on the water demand law of typical sand-fixing plants are implemented as described above.

[0018] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the irrigation control method based on the water demand law of typical sand-fixing plants as described above.

[0019] The beneficial effects of the present invention are as follows: the irrigation control method based on the water demand law of typical sand-fixing plants provided by the present invention enables the sand-fixing plants in the photovoltaic field to be irrigated on demand in a drought environment, which not only avoids the waste of water resources caused by excessive irrigation, but also prevents the restricted plant growth due to insufficient irrigation, thereby improving the survival rate and ecological benefits of vegetation in the photovoltaic field, while optimizing the utilization efficiency of water resources, and providing reliable technical guarantee for the ecological construction in desert areas and the sustainable operation of photovoltaic fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 A flow chart of an irrigation control method based on the water requirement law of typical sand-fixing plants provided in the first embodiment of the present invention.

[0022] Figure 2 This is a structural diagram of an irrigation control system based on the water requirement law of typical sand-fixing plants provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Example 1

[0026] Reference Figure 1, which is the first embodiment of the present invention, and provides an irrigation control method based on the water requirement law of typical sand-fixing plants, including: real-time collection of sand-fixing plant information and external factor data, and establishment of a water requirement law model of sand-fixing plants based on the collected sand-fixing plant information; using the collected external factor data to analyze the precipitation water collection efficiency in the photovoltaic field area, and quantify the water collection efficiency under different precipitation intensities; dynamically adjust the irrigation amount, time and frequency based on the water requirement law model of sand-fixing plants, soil moisture and precipitation water collection efficiency data, combined with real-time acquired precipitation water collection data, meteorological information and plant water requirement data; and feedback adjust the irrigation control strategy through evaluation of plant growth, yield and water resource utilization efficiency.

[0027] Combining years of meteorological observation data, we analyze the precipitation collection efficiency under different seasons, precipitation intensities and precipitation conditions, accurately quantify the precipitation collection efficiency of photovoltaic panels in different climate zones, and scientifically formulate strategies for efficient utilization of precipitation in different climate zones.

[0028] Typical native sand-fixing plants in the region were selected, and the plant stem sap flow observation system was used to conduct research on the patterns and amount of plant transpiration water consumption. Combined with meteorological data analysis and field irrigation experiments, the water requirement patterns and water requirement characteristics of different sand-fixing plants were mastered, and corresponding irrigation systems such as the number of irrigations, irrigation time, and irrigation amount were formulated.

[0029] We selected sand-fixing shrubs such as Haloxylon ammodendron, Atriplex canescens, and Nitraria tangutorum in the site, grafted them with Cistanche deserticola and Cynomorium songaricum, and used the plant stem sap flow observation system to compare the transpiration water consumption and water requirement patterns of the three shrubs under grafted / ungrafted conditions. We conducted field experiments to study the effects of different irrigation systems (drip irrigation time, drip irrigation frequency, irrigation amount) on the growth of Haloxylon ammodendron, Atriplex canescens, and Nitraria tangutorum, as well as their effects on the survival rate and yield of grafted Cistanche deserticola and Cynomorium songaricum. We selected perennial herbal Chinese medicinal materials (licorice, astragalus, bupleurum, dandelion, and Apocynum venetum) and forage (alfalfa), and conducted field experiments to study the effects of different irrigation systems (drip irrigation time, drip irrigation frequency, irrigation amount) on the yield of Chinese medicinal materials and forage. We mastered the water requirement and irrigation system of the above plants.

[0030] S1. Collect sand-fixing plant information and external factor data in real time, and establish a water demand law model of sand-fixing plants based on the collected sand-fixing plant information.

[0031] By installing a plant stem liquid flow observation system, soil moisture sensors and photovoltaic field precipitation collection devices, real-time information on the growth stage of sand-fixing plants, soil moisture, meteorological data, precipitation collection data and historical irrigation data are collected.

[0032] S2. Analyze the water collection efficiency of precipitation in the PV field area using the collected external factor data, and quantify the water collection efficiency under different precipitation intensities.

[0033] Analyze the relationship between plant water demand, including the relationship between plant transpiration rate and weather, the relationship between plant water demand and growth stage, and the relationship between root depth and soil moisture;

[0034] The relationship between plant transpiration rate and meteorology includes analyzing temperature, humidity, and solar radiation meteorological factors, and using the transpiration rate model Penman-Monteith equation to calculate the transpiration rate of plants. This equation combines meteorological factors, plant characteristics, and soil moisture conditions to accurately calculate the transpiration rate; the transpiration rate is a key indicator of the plant's demand for water.

[0035] The relationship between plant water demand and growth stage includes that the water demand varies according to the different growth stages of plants (such as germination, growth, flowering, maturity, etc.); the relationship between plant growth stage and water demand is established through experimental data.

[0036] The relationship between root depth and soil moisture includes that soil moisture at different depths affects the water absorption of the root system, so root distribution and soil moisture need to be analyzed together. The moisture conditions of each layer of the soil can be obtained through soil moisture sensor data, and a relationship can be established with the water absorption capacity of the root system.

[0037] Multiple regression analysis was used to establish the mathematical relationship between plant water requirements and meteorological factors (such as temperature, humidity, precipitation, etc.), plant growth stage and soil moisture, and the actual water requirements of sand-fixing plants were obtained.

[0038] Analyze the factors that affect the efficiency of precipitation water collection, which include precipitation intensity, photovoltaic panel tilt angle, photovoltaic panel surface cleanliness and smoothness, and evaporation loss;

[0039] Precipitation intensity is usually expressed in mm / hour or mm / day. When the precipitation intensity is high, the water flow may exceed the processing capacity of the water collection system, causing some water to run off or overflow, which will reduce the water collection efficiency. PV panel tilt angle: The tilt angle of the PV panel affects the flow of precipitation. A higher tilt angle can help precipitation flow to the water collection pipe faster, thereby improving the water collection efficiency. If the PV panel is horizontal or tilted at a small angle, precipitation may stay on the surface, resulting in a decrease in water collection efficiency. PV panel surface cleanliness and smoothness: The cleanliness of the PV panel surface directly affects the flow of precipitation. If dust or pollutants accumulate on the surface of the PV panel, rainwater will not easily flow to the water collection system, reducing the water collection efficiency. On the contrary, a clean and smooth surface can reduce water loss and improve water collection efficiency. Evaporation loss: After precipitation, part of the water will evaporate due to meteorological factors such as temperature, humidity, and wind speed. Especially in hot or dry weather conditions, evaporation losses are large, so the water collection efficiency will also be reduced.

[0040] By analyzing these influencing factors, a model of precipitation water collection efficiency can be established. The purpose of the model is to describe how the water collection efficiency changes with factors such as precipitation intensity, photovoltaic panel tilt angle, surface cleanliness, etc. A large amount of field data is collected to observe the impact of various factors on water collection efficiency.

[0041] According to different precipitation intensities (such as light precipitation, moderate precipitation, heavy precipitation, etc.), combined with the actual conditions of the photovoltaic panels (tilt angle, surface cleanliness, etc.), the water collection efficiency is evaluated. If the precipitation intensity is low, the water collection efficiency is high; if the precipitation intensity is high, the water collection efficiency is low; if the photovoltaic panel has a small tilt angle, the water collection efficiency is low; if the photovoltaic panel has a large tilt angle, the water collection efficiency is high; if the photovoltaic panel has a moderate tilt angle, the water collection efficiency is high; if the photovoltaic panel has a high surface cleanliness and smoothness, the water collection efficiency is high; if the photovoltaic panel has a low surface cleanliness and smoothness, the water collection efficiency is low;

[0042] In light precipitation (0-5mm / h), the water collection system collects all precipitation, and the water collection efficiency is high. At this time, the water flow is not easy to overflow or lose, and the water collection system can effectively collect precipitation. In moderate precipitation (5-15mm / h), the water collection system can still effectively collect most of the precipitation, but the water collection efficiency may be slightly reduced because the faster water flow may cause some water loss or evaporation loss. In this case, if the drainage capacity of the water collection system is reasonably designed, the water collection efficiency is still high. In heavy precipitation (15-30mm / h and above), the water collection system may face overflow or water loss. Especially when the water collection system has limited capacity and improper design, when the precipitation exceeds the water collection capacity, the water collection efficiency drops significantly. The drop in water collection efficiency is not only due to excessive water, but also because the water flow is too fast, and some water is not collected in time.

[0043] The photovoltaic panel has a small tilt angle (close to horizontal). When the photovoltaic panel has a small tilt angle (0° to 10°), precipitation will stay on the surface of the photovoltaic panel for a long time, the water flow may be very slow, and some water may be lost due to evaporation, and the water collection efficiency is low. In addition, the water flow may cause local water accumulation due to the horizontal surface of the panel, further reducing the water collection efficiency. The photovoltaic panel has a medium tilt angle (10° to 30°). At this angle, the precipitation flow speed is moderate, and the precipitation can flow into the water collection pipe more smoothly. The loss of water and evaporation is relatively small, so the water collection efficiency is high. The photovoltaic panel has a large tilt angle (30° to 45°). At a large tilt angle, precipitation usually flows quickly to the water collection system, reducing the retention time of water, reducing evaporation loss, and the water collection efficiency is high. However, if the precipitation intensity is too large, the tilt angle is too large, which may also cause the water flow to be too fast, and overflow or water loss may occur when the water collection system capacity is insufficient. The PV panels are tilted at extreme angles (above 45°). In this case, precipitation flows away from the surface of the PV panels almost immediately, which may cause the water to flow too fast and the water collection system cannot collect water in time, and the water collection efficiency will be reduced.

[0044] On a clean and smooth PV panel surface, precipitation can flow smoothly into the water collection pipe with almost no water loss, so the water collection efficiency is the highest. If there is dust, stains or other impurities on the surface of the PV panel, the flow of precipitation will be hindered, and some water will remain on the panel surface and may be lost due to evaporation. Therefore, unclean surfaces will lead to reduced water collection efficiency. When the surface of the PV panel is seriously polluted, precipitation cannot flow smoothly into the water collection pipe, and the accumulated water may stagnate due to the large surface friction, and the evaporation loss will increase, resulting in a significant decrease in water collection efficiency.

[0045] Under different precipitation intensity conditions, the precipitation and the actual amount of water collected are recorded, and the collected data are used to analyze the water collection efficiency under different precipitation intensities. For example, when the precipitation intensity is 10mm / h, the amount of water collected by the water collection system may be 9mm, and the water collection efficiency at this time is 90%. For heavy precipitation (for example, 20mm / h), the collection efficiency may decrease due to excessive water or capacity limitations of the water collection system, so the water collection efficiency will be lower than 90%.

[0046] S3. Dynamically adjust the irrigation amount, time and frequency based on the water requirement model of sand-fixing plants, soil moisture and precipitation water collection efficiency data, combined with real-time precipitation water collection data, meteorological information and plant water requirement data.

[0047] Set a soil moisture threshold. If the soil moisture is less than or equal to the soil moisture threshold, irrigation is required. If the soil moisture is greater than the soil moisture threshold, irrigation is stopped. Combined with the precipitation collection efficiency data of the photovoltaic field area, the efficiency of the water collection system in collecting precipitation is determined. If the water collection efficiency is low, the irrigation amount is increased.

[0048] Under the same conditions, that is, the plant water requirement and precipitation collection efficiency are the same, if the soil moisture is low, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high. If the soil moisture is high, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low.

[0049] The soil moisture and precipitation water collection efficiency are the same. If the plant water requirement is low, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low. If the plant water requirement is high, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high.

[0050] The water requirement of plants is the same as the soil moisture. If the precipitation and water collection efficiency is low, the irrigation amount will be low, the irrigation time will be short, and the irrigation frequency will be low. If the precipitation and water collection efficiency is high, the irrigation amount will be high, the irrigation time will be long, and the irrigation frequency will be high.

[0051] The amount of irrigation is determined based on soil moisture, plant water demand, precipitation, and water collection efficiency. When precipitation and water collection efficiency are high, the amount of irrigation is low; when soil moisture is low or plant water demand is high, the amount of irrigation is large. Irrigation time When soil moisture is low, the irrigation time is long; when plant water demand is high, the irrigation time is moderate. Irrigation frequency When precipitation is high, the frequency is low; when precipitation is insufficient or soil moisture is low, the frequency is high.

[0052] S4. Feedback and adjust irrigation control strategies through evaluation of plant growth, yield and water resource utilization efficiency.

[0053] By real-time monitoring of plant growth, yield and water use efficiency WUE, the water demand of plants and the effectiveness of irrigation strategies can be dynamically evaluated. If WUE is low or plant growth is poor, the irrigation amount can be increased and the irrigation time and frequency can be adjusted based on feedback.

[0054] If the plants grow well and WUE is high, reduce the amount of irrigation, optimize the timing of irrigation, and improve the efficiency of water resource utilization.

[0055] Continuous monitoring and adjustments ensure that irrigation strategies always match plant needs and environmental conditions, maximizing plant yield and water use efficiency.

[0056] Example 2

[0057] Reference Figure 2 , which is the second embodiment of the present invention, is different from the previous embodiment in that it provides an irrigation control system based on the water demand law of typical sand-fixing plants, including: a data acquisition module 100, a precipitation and water collection efficiency quantification module 200, an adjustment module 300 and a feedback module 400.

[0058] The data collection module 100 is used to collect sand-fixing plant information and external factor data in real time, and to establish a water demand law model of sand-fixing plants based on the collected sand-fixing plant information.

[0059] The precipitation water collection efficiency quantification module 200 uses the collected external factor data to analyze the precipitation water collection efficiency in the photovoltaic field area and quantify the water collection efficiency under different precipitation intensities.

[0060] The adjustment module 300 is used to dynamically adjust the irrigation amount, time and frequency according to the water demand law model of sand-fixing plants, soil moisture and precipitation water collection efficiency data, combined with real-time precipitation water collection data, meteorological information and plant water demand data.

[0061] The feedback module 400 is used to adjust the irrigation control strategy through feedback based on the evaluation of plant growth, yield and water resource utilization efficiency.

[0062] If the functions 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, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0063] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0064] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0065] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0066] Embodiment 3 is the third embodiment of the present invention. It is different from the first two embodiments in that it is used to verify the technical effects adopted in the present invention so as to verify the real effects of the method.

[0067] Traditional methods usually rely on fixed irrigation plans, with irrigation volume and frequency controlled manually or by timers, and are usually not able to be flexibly adjusted according to actual conditions (such as soil moisture, meteorological conditions, etc.). Irrigation plans may be set based on experience and cannot be precisely controlled, resulting in water waste or restricted plant growth.

[0068] The method of the present invention and the traditional method are used for simultaneous detection.

[0069] This embodiment uses the traditional method and the method of the present invention to perform detection simultaneously, and the detection comparison results are shown in the following Table 1:

[0070] Table 1 Comparison table between traditional method and method of the present invention

[0071]

[0072] The above data comparison table clearly demonstrates the significant advantages of the method of the present invention in terms of water resource utilization efficiency, irrigation accuracy and plant growth. Compared with traditional methods, the method of the present invention can achieve more efficient, intelligent and precise irrigation control, provide a better growth environment for sand-fixing plants in desert photovoltaic power fields, and optimize the utilization of water resources, with obvious ecological and economic benefits.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An irrigation control method based on the water demand law of typical sand-fixing plants, characterized by: include, Collect sand-fixing plant information and external factor data in real time, and establish a water demand model for sand-fixing plants based on the collected sand-fixing plant information; Using the collected external factor data, the precipitation water collection efficiency in the photovoltaic field area is analyzed and the water collection efficiency under different precipitation intensities is quantified; Dynamically adjust irrigation quantity, time and frequency based on the water demand law model of sand-fixing plants, soil moisture and precipitation water collection efficiency data, combined with real-time precipitation water collection data, meteorological information and plant water demand data; By evaluating plant growth, yield and water use efficiency, irrigation control strategies are adjusted based on feedback.

2. The irrigation control method based on the water demand law of typical sand-fixing plants according to claim 1 is characterized in that: The real-time collection of sand-fixing plant information and external factor data includes installing a plant stem liquid flow observation system, a soil moisture sensor and a photovoltaic field precipitation collection device to collect real-time sand-fixing plant growth stage information, soil moisture, meteorological data, precipitation collection data and historical irrigation data.

3. The irrigation control method based on the water demand law of typical sand-fixing plants as claimed in claim 2 is characterized by: The establishment of the water demand law model of sand-fixing plants includes analyzing the relationship between plant water demand, which includes the relationship between plant transpiration rate and meteorology, the relationship between plant water demand and growth stage, and the relationship between root depth and soil moisture; The relationship between plant transpiration rate and meteorology includes calculating the plant transpiration rate using the transpiration rate model Penman-Monteith equation by analyzing temperature, humidity, and solar radiation meteorological factors; The relationship between the water requirement of plants and the growth stage includes that the water requirement varies according to the different growth stages of the plants; The relationship between the root depth and soil moisture includes obtaining the moisture conditions of each layer of the soil through soil moisture sensor data and establishing a relationship with the moisture absorption capacity of the root system; Multiple regression analysis was used to establish the mathematical relationship between plant water requirements and meteorological factors, plant growth stage and soil moisture, and the actual water requirements of sand-fixing plants were obtained.

4. The irrigation control method based on the water demand law of typical sand-fixing plants as claimed in claim 3 is characterized by: The precipitation water collection efficiency of the photovoltaic field area includes analyzing the factors affecting the precipitation water collection efficiency, and the factors affecting the precipitation water collection efficiency include precipitation intensity, photovoltaic panel tilt angle, photovoltaic panel surface cleanliness and smoothness, and evaporation loss; According to different precipitation intensities, combined with the actual situation of photovoltaic panels, the water collection efficiency is evaluated. If the precipitation intensity is low, the water collection efficiency is high; if the precipitation intensity is high, the water collection efficiency is low; if the photovoltaic panel has a small inclination angle, the water collection efficiency is low; if the photovoltaic panel has a large inclination angle, the water collection efficiency is high; if the photovoltaic panel has a moderate inclination angle, the water collection efficiency is high; if the photovoltaic panel has a high surface cleanliness and smoothness, the water collection efficiency is high; if the photovoltaic panel has a low surface cleanliness and smoothness, the water collection efficiency is low; The quantification of the water collection efficiency under different precipitation intensities includes recording the precipitation and the actual amount of water collected under different precipitation intensities, and the collected data is used to analyze the water collection efficiency under different precipitation intensities.

5. The irrigation control method based on the water demand law of typical sand-fixing plants as claimed in claim 4 is characterized by: The dynamic adjustment of irrigation amount, time and frequency includes setting a soil moisture threshold. If the soil moisture is less than or equal to the soil moisture threshold, it indicates that irrigation is needed. If the soil moisture is greater than the soil moisture threshold, irrigation is stopped. Combined with the precipitation collection efficiency data of the photovoltaic field area, the efficiency of the water collection system in collecting precipitation is determined. If the water collection efficiency is low, the irrigation amount is increased.

6. The irrigation control method based on the water demand law of typical sand-fixing plants as claimed in claim 5 is characterized by: The dynamic adjustment of irrigation amount, time and frequency also includes that under the same conditions, if the soil moisture is low, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high; if the soil moisture is high, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low; if the plant water requirement is low, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low; if the plant water requirement is high, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high; if the precipitation water collection efficiency is low, the irrigation amount is low, the irrigation time is short, and the irrigation frequency is low; if the precipitation water collection efficiency is high, the irrigation amount is high, the irrigation time is long, and the irrigation frequency is high.

7. The irrigation control method based on the water demand law of typical sand-fixing plants according to claim 6 is characterized in that: The feedback adjustment irrigation control strategy includes dynamically evaluating the water demand of plants and the effectiveness of irrigation strategies by real-time monitoring of plant growth, yield and water use efficiency WUE. If WUE is low or plant growth is poor, the irrigation amount is increased and the irrigation time and frequency are adjusted according to the feedback; If the plants grow well and WUE is high, reduce the amount of irrigation, optimize the timing of irrigation, and improve the efficiency of water resource utilization; Continuous monitoring and adjustments ensure that irrigation strategies always match plant needs and environmental conditions, maximizing plant yield and water use efficiency.

8. A system using the irrigation control method based on the water demand law of typical sand-fixing plants as claimed in any one of claims 1 to 7, characterized in that: It comprises a data collection module (100), a precipitation water collection efficiency quantification module (200), an adjustment module (300) and a feedback module (400); The data collection module (100) is used to collect sand-fixing plant information and external factor data in real time, and to establish a water demand law model of sand-fixing plants based on the collected sand-fixing plant information; The precipitation water collection efficiency quantification module (200) uses the collected external factor data to analyze the precipitation water collection efficiency in the photovoltaic field area and quantify the water collection efficiency under different precipitation intensities; The adjustment module (300) is used to dynamically adjust the irrigation amount, time and frequency according to the water demand law model of the sand-fixing plants, soil moisture and precipitation water collection efficiency data, and in combination with the precipitation water collection data, meteorological information and plant water demand data acquired in real time; The feedback module (400) is used to feedback and adjust the irrigation control strategy by evaluating plant growth, yield and water resource utilization efficiency.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the irrigation control method based on the water demand law of typical sand-fixing plants described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the irrigation control method based on the water demand law of typical sand-fixing plants described in any one of claims 1 to 7 are implemented.

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