A photovoltaic desertification control device and a method for planting vegetation in a photovoltaic sand field.

Abstract

This application relates to the field of photovoltaic sand control, specifically a photovoltaic sand control device and a method for planting plants in a photovoltaic sand field. The photovoltaic sand control device includes: a water-blocking device comprising a first water-blocking section and a second water-blocking section, with a planting space for planting plants between the first and second water-blocking sections; and an irrigation device disposed between the first and second water-blocking sections, comprising a water storage tank and a water pipe connected to the water storage tank, the water pipe extending towards the plant root system. The technical solution of this application can effectively solve the problem of low plant survival rate in photovoltaic sand fields.

Description

Technical Field

[0001] This application relates to the field of photovoltaic sand control, and in particular to a photovoltaic sand control device and a method for planting plants in a photovoltaic sand field. Background Art

[0002] Currently, solar photovoltaic (PV) power plants are mostly built in deserts, arid regions, and Gobi areas. Due to their safety, convenience, high efficiency, and land-saving characteristics, they have become a widely recognized and prioritized development method. To curb further desertification, the concept of using photovoltaic sand control sites has been proposed to prevent the spread of these sites and the generation of new sand sources.

[0003] In related technologies, the main method for desertification control in photovoltaic sand fields is to plant drought-resistant plants. In order to improve the survival rate of plants, they are generally irrigated in two ways: one is to spray irrigation water from drinking water sources, and the other is to set up some guiding devices to guide rainwater to the plants for irrigation, thereby improving the survival rate of plants.

[0004] Introducing irrigation water involves large-area spraying, which cannot achieve precise irrigation of plants, and is characterized by high water consumption and high cost. Using guiding devices to direct rainwater has limited effect on irrigating plants, and consequently, has limited effect on improving plant survival rates. Summary of the Invention

[0005] This application provides a photovoltaic desertification control device and a plant planting method for photovoltaic sand fields to solve the problem of low plant survival rate in photovoltaic sand fields.

[0006] On the one hand, this application provides a photovoltaic desertification control device, comprising:

[0007] A water-blocking device, comprising a first water-blocking part and a second water-blocking part, with a planting space for planting plants between the first water-blocking part and the water-blocking part.

[0008] An irrigation device is located between the first and second water-retaining parts. The irrigation device includes a water storage tank and a water pipe connected to the water storage tank, with the water pipe extending toward the plant roots.

[0009] In some embodiments, the first water-retaining part and the second water-retaining part are buried in the planting area of ​​the plant, and the top ends of the first water-retaining part and the second water-retaining part extend to the ground surface of the planting area, and the bottom ends extend to the pore water level of the planting area.

[0010] In some embodiments, the irrigation device further includes an injection needle disposed at the water outlet end of the water pipe, the injection needle being used to insert into the root system of the plant.

[0011] On the other hand, this application provides a method for planting vegetation in a photovoltaic sand field, using the aforementioned photovoltaic sand control device, the method comprising:

[0012] Determine the planting area and the types of plants to be planted;

[0013] Determine the pore water level in the planting area;

[0014] Determine the planting spacing for the plants;

[0015] The location of the irrigation device should be determined based on the planting interval of the plants;

[0016] Plant the plants and connect the water outlet of the irrigation device to the location of the plants.

[0017] In some embodiments, between the step of determining the location of the irrigation device according to the planting interval of the plants and the step of planting the plants and connecting the water storage device to the root system of the plants, the method further includes:

[0018] Determine the amount of irrigation water to be injected into the irrigation system.

[0019] In some embodiments, in the step of determining the amount of irrigation water injected into the irrigation device,

[0020] The amount of irrigation water injected into the irrigation device is determined based on the source and sink parameters.

[0021] In some embodiments, the values ​​of the source and sink terms are determined according to the following formula.

[0022]

[0023] in, For source and sink items, Let F(ψ) be the root distribution function, and F(ψ) be the transpiration rate reduction factor. This represents the actual transpiration rate of the plant.

[0024] In some embodiments, the actual transpiration rate of the plant is determined according to the following formula. The value:

[0025]

[0026] in, This refers to soil evaporation. denoted as the leaf area index of the plant, and Q, W, and C are empirical parameters for the variation of the leaf area index of the plant.

[0027] In some embodiments, the step of connecting the water outlet of the irrigation device to the location of the plant includes:

[0028] Insert the injection needle of the irrigation device into the xylem of the plant root system.

[0029] In some embodiments, after the step of inserting the injection needle of the irrigation device into the cortex of the plant roots, the method further includes:

[0030] Use a binding tool to bind the injection needle and plant roots.

[0031] The photovoltaic desertification control device provided in this application includes a water-blocking device and an irrigation device. The irrigation device can store irrigation water to water the plants. Specifically, the irrigation device includes a water storage tank and a water pipe connected to the water storage tank. The water pipe can extend to the root system of the plants, thereby achieving precise watering of the plants, which helps to save irrigation water and reduce the maintenance cost of the plants. The water-blocking device can stop the irrigation water flowing out of the irrigation device, preventing it from spreading to areas far from the plant roots. This increases the water content in the soil around the plant roots, improves the utilization rate of irrigation water, and ultimately improves the survival rate of the plants. Specifically, the water-blocking device includes a first water-blocking part and a second water-blocking part. The first water-blocking part and the second water-blocking part form a planting space for planting plants. The first water-blocking part and the second water-blocking part can prevent the irrigation water flowing out of the irrigation device from flowing to a position outside the planting space, guide the irrigation water to spread downwards, and help guide the irrigation water to the pore water level. This helps to build a channel connecting the pore water level and the irrigation water in the planting space, thereby effectively improving the irrigation effect of the plants.

[0032] Therefore, the photovoltaic desertification control device of this application introduces external water sources to precisely irrigate plants through an irrigation device, and achieves the functions of water retention and opening up water flow channels through a water-blocking device. Thus, the combination of the two enhances the irrigation effect on plants, thereby improving the survival rate of plants. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0034] Figure 1 This is a schematic diagram of the structure of the photovoltaic desertification control device provided in the embodiments of this application, wherein, Figure 1 A schematic diagram of a photovoltaic desertification control device applied to flat terrain is shown.

[0035] Figure 2 This is a schematic diagram of the structure of the photovoltaic desertification control device provided in the embodiments of this application, wherein, Figure 2 A schematic diagram of a photovoltaic desertification control device applied to a sloping surface is shown.

[0036] Figure 3 This is a schematic diagram of the structure of the photovoltaic desertification control device provided in the embodiments of this application, wherein, Figure 3 A schematic diagram of the photovoltaic desertification control device applied under a photovoltaic panel is shown.

[0037] Figure 4 A schematic diagram of the connection between the irrigation device and the plant root system of the photovoltaic desertification control device provided in the embodiments of this application;

[0038] Figure 5 A flowchart illustrating the plant cultivation method for a photovoltaic sand field provided in this application embodiment;

[0039] Figure 6 A graph showing the functional relationship between root suction and transpiration rate reduction coefficient provided in an embodiment of this application;

[0040] Figure 7 A graph showing the functional relationship between growth time and leaf area index provided in the embodiments of this application;

[0041] Figure 8 The graph showing the functional relationship between growth time and soil evaporation is provided for the embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Water-blocking device; 110. First water-blocking part; 120. Second water-blocking part;

[0044] 200. Irrigation device; 210. Water storage tank; 220. Water pipe; 230. Injection needle;

[0045] 300. Plant; 311. Cortex; 312. Xylem;

[0046] 400. Bundling tools;

[0047] 500. Earth's surface;

[0048] 600, pore water level;

[0049] 700. Photovoltaic panels.

[0050] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In related technologies, the main method for desertification control in photovoltaic sand fields is to plant drought-resistant plants. In order to improve the survival rate of plants, they are generally irrigated in two ways: one is to spray irrigation water from drinking water sources, and the other is to set up some guiding devices to guide rainwater to the plants for irrigation, thereby improving the survival rate of plants.

[0053] Introducing irrigation water involves large-area spraying, which cannot achieve precise irrigation of plants, and is characterized by high water consumption and high cost. Using guiding devices to direct rainwater has limited effect on irrigating plants, and consequently, has limited effect on improving plant survival rates.

[0054] After research, the inventors discovered that the main reason for the low survival rate of plants in photovoltaic sand fields is the significant distance between the pore water table and the ground surface. This creates a thick, waterless zone between the surface and the pore water table, making it difficult for plant roots to absorb water. Plants can only survive by relying on external irrigation. Once the plant roots extend to the pore water table, they can absorb water from the soil and survive. Therefore, the key to improving plant survival rates lies in ensuring that the plant roots can successfully extend to the pore water table.

[0055] Based on this, this application provides a photovoltaic desertification control device and a plant planting method for photovoltaic sand fields to ensure that the plants can successfully survive the water shortage period after planting until the roots can extend to the pore water level, thereby improving the survival rate of the plants.

[0056] The photovoltaic desertification control device provided in the embodiments of this application is described below with reference to the accompanying drawings.

[0057] Figure 1 This is a schematic diagram of the structure of the photovoltaic desertification control device provided in the embodiments of this application, wherein, Figure 1 A schematic diagram of a photovoltaic desertification control device applied to flat terrain is shown.

[0058] like Figure 1 As shown, the photovoltaic desertification control device of this embodiment includes: a water-blocking device 100 and an irrigation device 200.

[0059] The water-blocking device 100 includes a first water-blocking part 110 and a second water-blocking part 120, and there is a planting space between the first water-blocking part 110 and the water-blocking part for planting plants 300.

[0060] The irrigation device 200 is disposed between the first water-blocking part 110 and the second water-blocking part 120. The irrigation device 200 includes a water storage tank 210 and a water guide pipe 220 connected to the water storage tank 210. The water guide pipe 220 extends toward the plant roots.

[0061] Applying the technical solution of this embodiment, the photovoltaic desertification control device includes a water-blocking device 100 and an irrigation device 200. The irrigation device 200 can store irrigation water to irrigate the plants 300. Specifically, the irrigation device 200 includes a water storage tank 210 and a water pipe 220 connected to the water storage tank 210. The water pipe 220 can extend to the root system of the plants 300, thereby achieving precise irrigation of the plants, which helps to save irrigation water and reduce the maintenance cost of the plants. The water-blocking device 100 can block the irrigation water flowing out of the irrigation device 200 to prevent the irrigation water from spreading to areas far from the plant roots, thereby increasing the water content in the soil around the plant roots, improving the utilization rate of irrigation water, and thus improving the survival rate of the plants. Specifically, the water-blocking device 100 includes a first water-blocking part 110 and a second water-blocking part 120, which form a planting space for planting plants 300. The first water-blocking part 110 and the second water-blocking part 120 can block the irrigation water flowing out of the irrigation device 200 from flowing to a position outside the planting space, guide the irrigation water to spread downward, and help guide the irrigation water to the pore water level, thereby helping to build a channel connecting the pore water level and the irrigation water in the planting space, thus effectively improving the irrigation effect of the plants.

[0062] Therefore, in this embodiment, an external water source is introduced through the irrigation device 200 to precisely irrigate the plants, and the water-blocking device 100 is used to retain water and open up the water flow channel. Thus, the combination of the two achieves irrigation of the plants and improves the survival rate of the plants.

[0063] like Figure 1 As shown, in order to ensure that the roots of the plant can grow smoothly to the pore water level, in some embodiments, the first water-blocking part 110 and the second water-blocking part 120 are buried in the planting area of ​​the plant. The top ends of the first water-blocking part 110 and the second water-blocking part 120 extend to the ground surface of the planting area, and the bottom ends extend to the pore water level 600 of the planting area.

[0064] In the above structure, the top ends of both the first water-retaining part 110 and the second water-retaining part 120 extend to the ground surface of the planting area, and the bottom ends extend to the pore water level 600 of the planting area. Therefore, the first water-retaining part 110 and the second water-retaining part 120 can not only prevent irrigation water flowing out of the irrigation device 200 from flowing to a location outside the planting space, thereby improving the utilization rate of irrigation water, but also guide the irrigation water downwards, helping to guide the irrigation water to the pore water level. This helps to build a channel connecting the pore water level and the irrigation water within the planting space, thereby effectively improving the irrigation effect of the plants.

[0065] It should be noted that pore water level refers to the water level height in the pores of underground rock or soil. Changes in pore water level are influenced by various factors, including rainfall, groundwater recharge, and groundwater discharge. Pore water level can be measured using various level gauges or pressure gauges. For example, pore water level can be measured using devices such as pore water pressure gauges or vibrating wire level gauges.

[0066] To further improve irrigation water utilization and increase plant survival rate, Figure 4 A schematic diagram of the connection between the irrigation device and the plant root system of the photovoltaic desertification control device provided in this application embodiment is shown.

[0067] like Figure 4 As shown, the irrigation device 200 also includes an injection needle 230 disposed at the water outlet end of the water pipe 220, the injection needle 230 being used to insert into the root system of the plant.

[0068] In the above structure, the plant root system is an important part of the plant's water absorption. Therefore, by connecting the injection needle 230 to the plant root system, irrigation water can be directly injected into the plant root system, thereby improving the irrigation effect, achieving precise irrigation, and saving irrigation water.

[0069] It should be noted that the injection needle 230 can be inserted through the cortex 311 of the plant root system and connected to the xylem 312, so that irrigation water can be directly injected into the xylem 312.

[0070] Specifically, the xylem of plant roots is a complex tissue within the vascular plant, mainly composed of vessels, tracheids, wood fibers, and wood parenchyma cells. This tissue often combines with the cortex to form vascular bundles, distributed throughout the plant, constituting the vascular system. The xylem is primarily responsible for transporting water and nutrients, as well as supporting the plant. Therefore, by connecting the injection needle 230 to the xylem 312 of the plant root system, irrigation water can be directly transported into the plant through the xylem 312, thereby improving the plant's survival rate.

[0071] It should also be noted that plant nutrients can be added to the irrigation system to improve the survival rate of plants.

[0072] like Figure 4 As shown, in some embodiments, in order to ensure that the injection needle 230 is tightly connected to the plant roots, the photovoltaic desertification control device also includes a binding tool. The binding tool can bind the injection needle 230 to the plant roots, thereby helping to fix the position of the injection needle 230 so that it can be inserted into the plant roots.

[0073] For example, the binding tool can be a rope, rubber band, etc.

[0074] It should be noted that, as Figure 2As shown, when the surface of the sand field is sloping, the irrigation device can be placed above the plants, allowing the irrigation water to flow downhill using the slope. In this case, the placement of the water-blocking device needs to consider the terrain to avoid obstructing the irrigation water flowing down from above. For example, the water-blocking device can be based on the entire sloping area, with the first and second water-blocking sections only located at the uppermost and lowermost sides of the sloping area.

[0075] It should also be noted that, such as Figure 3 As shown, when installing photovoltaic panels 700 in a sand-growing area, the photovoltaic panels can also be used as part of a photovoltaic desertification control device. Utilizing the natural advantage of the tilted installation of the photovoltaic panels, they can act as a rainwater guide, allowing rainwater to flow towards the plants after falling on the panels, thus improving plant survival rates. Specifically, refer to... Figure 3 The photovoltaic panels are arranged in a specific manner. Specifically, an irrigation system is installed between two adjacent rows of plants, allowing the system to water both sides of the plants simultaneously. The photovoltaic panels are then installed according to the plant placement, with the lowest point of the panels extending above the plants to facilitate the guidance of rainwater.

[0076] On the other hand, this embodiment also provides a method for planting vegetation in a photovoltaic sand field, which utilizes the aforementioned photovoltaic sand control device. Figure 5 A flowchart illustrating the plant cultivation method for a photovoltaic sand field provided in this application embodiment.

[0077] As shown in the figure, the planting methods for photovoltaic sand fields include:

[0078] Step S100: Determine the planting area and the types of plants to be planted;

[0079] Step S200: Determine the pore water level of the plant planting area to be 600;

[0080] Step S300: Determine the planting interval for the plants;

[0081] Step S400: Determine the location of the irrigation device 200 according to the planting interval of the plants;

[0082] Step S500: Plant the plants and connect the water outlet of the irrigation device 200 to the location of the plants.

[0083] Applying the technical solution of the above embodiments, in step S100, the operator can first analyze the area within the photovoltaic sand field, delineate areas suitable for plant planting, and select plant species, such as specific drought-resistant plant varieties. Simultaneously, this step can also analyze the terrain information within the sand field area, such as the terrain being... Figure 1The flat terrain shown, such as Figure 2 The sloping terrain shown. Or as... Figure 3 The area where the photovoltaic panels are installed is shown in the diagram.

[0084] In step 200, determining the location of the pore water level 600 plays a crucial role in improving the survival rate of plants in the photovoltaic sand field. Specifically, the low survival rate of plants in the sand field is mainly due to the significant distance between the pore water level and the ground surface, resulting in a thick, waterless zone. Plant roots struggle to absorb water in this zone and can only survive by relying on external irrigation. Once the plant roots extend to the pore water level, they can absorb water from the soil and survive. Therefore, the key to improving plant survival is ensuring that the plant roots can successfully extend to the pore water level. Determining the pore water level 600 also plays a crucial role in determining the amount of irrigation water injected into the irrigation system.

[0085] In steps S300 and S400, the planting interval of the plants is determined, so that the operator can determine the location of the irrigation device 200 according to the planting interval of the plants.

[0086] In step S500, plants are planted according to the plant planting interval determined in step S400, and the water outlet of the irrigation device 200 is connected to the location of the plants, thereby irrigating the plants and increasing their survival rate.

[0087] It should be noted that in some embodiments, step S400 may include steps S410 and S420. Specifically, step S410 includes: determining the installation position of the irrigation device 200 according to the planting interval of the plants; S420 includes: determining the installation position of the water-blocking structure according to the planting interval of the plants.

[0088] Specifically, if Figure 1 As shown, when the surface of the sand pit area is flat, the water-retaining device can be installed in appropriate areas with a first water-retaining section and a second water-retaining section. For example... Figure 2 As shown, when the surface of the sand field area is sloping, the water-blocking device can be based on the entire sloping terrain area, with the first and second water-blocking parts only set on the uppermost and lowermost sides of the sloping terrain area.

[0089] In some embodiments, between step S400 and step S500, the plant planting method for the photovoltaic sand field further includes:

[0090] Step S600: Determine the amount of irrigation water injected into the irrigation device 200.

[0091] Specifically, in step S600, the amount of irrigation water injected into the irrigation device 200 can be determined based on the source and sink terms.

[0092] In some embodiments, the value of the source-sink term S(z) is determined according to the following formula.

[0093]

[0094] Where S(z) is the source-sink term, α(Z) is the root distribution function, and F(ψ) is the transpiration rate reduction factor. This represents the actual transpiration rate of the plant.

[0095] In the above steps, the source-sink term S(z) can characterize: the water flow rate (unit: m / s) required by the root system for water content. Through unit conversion, since the density of water is approximately 1000 kg / m³, the volumetric flow rate (V, unit m³ / s) = flow velocity (m / s) × cross-sectional area (A, unit m²), assuming the cross-sectional area through which the water flows is 0.0001 m² (1 cm²); volumetric flow rate (ml / s) = volumetric flow rate (m³ / s) × 1000000. Therefore, it can serve as a key parameter for determining the amount of irrigation water injected into the irrigation device.

[0096] and The root distribution function α(Z), the transpiration rate reduction factor F(ψ), and the actual transpiration of the plant are compared with those of the root distribution function α(Z), the transpiration rate reduction factor F(ψ), and the actual transpiration of the plant. Specifically, the transpiration rate reduction factor F(ψ) is used to characterize the reduction factor of soil water absorption capacity under saturated and unsaturated conditions. It is obtained through the root water absorption-suction relationship function (e.g., ...). Figure 6 (As shown); actual plant transpiration. The amount of transpiration in plant leaves is used to characterize the actual amount of transpiration in plants, which can be obtained by comparing the actual soil evaporation with the plant leaf area index.

[0097] In some embodiments, the actual transpiration rate of the plant is determined according to the following formula. The value:

[0098]

[0099] in, This refers to soil evaporation. Q represents the leaf area index of the plant. Q, W, and C are empirical parameters for the variation of the leaf area index of a certain plant.

[0100] The above steps have the following effects The parameters include soil evaporation and leaf area index. Among them, such as... Figure 8 As shown, soil evaporation It is related to the geographical environment of the region where the plant is located. For example... Figure 7 As shown, the leaf area index of the plant species It is an empirical function of leaves derived from the changes in plant leaf growth, and it is related to the growth time of the plant.

[0101] The above-mentioned acquisition methods can capture the precipitation effect in the sand field area to the greatest extent possible, thereby reflecting the actual transpiration of plants. The values ​​are more accurate, which in turn makes the amount of irrigation water injected into the irrigation device more accurate. This helps ensure that there is enough irrigation water to maintain the survival rate of plants before their roots enter the pore water level.

[0102] In step S500, connecting the water outlet of the irrigation device 200 to the location of the plant specifically includes:

[0103] Insert the injection needle of the irrigation device 200 into the xylem of the plant root system.

[0104] In the above steps, the xylem of the plant root system is a complex tissue within the vascular plant, mainly composed of vessels, tracheids, wood fibers, and wood parenchyma cells. This tissue often combines with the cortex to form vascular bundles, distributed throughout the plant, constituting the vascular system. The xylem is primarily responsible for transporting water and nutrients, as well as supporting the plant. Therefore, by connecting the injection needle 230 to the xylem 312 of the plant root system, irrigation water can be directly transported into the plant through the xylem 312, thereby improving the plant's survival rate.

[0105] In some embodiments, after the step of inserting the injection needle of the irrigation device 200 into the cortex 311 of the plant root system, the method further includes:

[0106] Step S700: Use a binding tool to bind the injection needle and plant roots.

[0107] In the above steps, the binding tool can bind the injection needle to the plant roots, thereby helping to fix the position of the injection needle so that it can be inserted into the plant's root system.

[0108] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0109] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0110] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0111] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for planting vegetation in a photovoltaic sand field, characterized in that, The method, applied to photovoltaic desertification control devices, includes: Determine the planting area and the types of plants to be planted; Determine the pore water level in the plant planting area; Determine the planting spacing for the plants; The location of the irrigation device is determined based on the planting interval of the plants; The amount of irrigation water injected into the irrigation device is determined based on the source and sink terms, and the value of the source and sink terms is determined according to the following formula. in, For source and sink items, Let F(ψ) be the root distribution function, and F(ψ) be the transpiration rate reduction factor. This represents the actual transpiration rate of the plant. Plant the plants and connect the water outlet of the irrigation device to the location of the plants; The photovoltaic desertification control device includes: A water-blocking device, comprising a first water-blocking part and a second water-blocking part, wherein a planting space for planting plants is provided between the first water-blocking part and the water-blocking part. An irrigation device is disposed between the first water-blocking part and the second water-blocking part. The irrigation device includes a water storage tank and a water guide pipe communicating with the water storage tank, and the water guide pipe extends toward the plant root system.

2. The method for planting vegetation in a photovoltaic sand field according to claim 1, characterized in that, The actual transpiration rate of the plant is determined using the following formula. The value: in, This refers to soil evaporation. denoted as the leaf area index of the plant, and Q, W, and C are empirical parameters for the variation of the leaf area index of the plant.

3. The method for planting vegetation in a photovoltaic sand field according to claim 1, characterized in that, The step of connecting the water outlet of the irrigation device to the location of the plant includes: The injection needle of the irrigation device is inserted into the xylem of the plant root system.

4. The plant planting method for the photovoltaic sand field according to claim 3, characterized in that, After the step of inserting the injection needle of the irrigation device into the cortex of the plant root system, the method further includes: Use a binding tool to bind the injection needle and the plant root system.

5. The method for planting vegetation in a photovoltaic sand field according to claim 1, characterized in that, The first water-blocking part and the second water-blocking part are buried in the planting area of ​​the plant. The top ends of the first water-blocking part and the second water-blocking part extend to the ground surface of the planting area, and the bottom ends extend to the pore water level of the planting area.

6. The method for planting vegetation in a photovoltaic sand field according to claim 1, characterized in that, The irrigation device also includes an injection needle located at the outlet end of the water pipe, the injection needle being used to insert into the root system of the plant.

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