Method suitable for planting, carbon sequestration and sand stabilization under photovoltaic panel in muddy Dacromet sand land

Abstract

The invention provides a shrub and grass matched wind prevention and sand fixation method under a photovoltaic panel of a mudshandack sand land. The method comprises the following steps: S1, planting herbaceous plants matched with small half shrubs in front of the photovoltaic panel; s2, adopting sand-barrier automatic sowing equipment to plant shrubs and weeds in and behind the photovoltaic panel; the herbaceous plants comprise artemisia desertorum, agriophyllum squarrosum, liquorice, wheatgrass, leymus chinensis and astragalus mongholicus in North China; the small half shrubs are caragana microphylla, caragana angustifolia and camellia hupehensis; the shrubs are red sand, caragana microphylla, caragana angustifolia, amygdalus pedunculata, alpinia hupehensis, salix babylonica, artemisia stelleriana, caragana microphylla and thyme; the weeds are agriophyllum squarrosum, agriophyllum squarrosum, pugionium Wind prevention and sand fixation engineering and photovoltaic industry land are ingeniously combined, adaptive vegetation is planted under the photovoltaic panel which is most prone to wind erosion and in the peripheral area, surface soil can be effectively fixed, sand dune mobility is reduced, a photovoltaic panel support foundation is protected against wind erosion damage, and the service life of a power station is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of windbreak and sand control, specifically a method for planting carbon sequestration and sand fixation under photovoltaic panels in the Hunshandake Sandy Land. Background Technology

[0002] The Hunshandake Sandy Land is one of my country's four major sandy lands and one of the three landmark battles in the "Three-North" national development strategy. The Hunshandake Sandy Land experiences cold, dry, and windy winters and springs, making it one of the sandy areas with the highest wind speeds in the country. The average annual temperature is 0-3℃, with annual precipitation ranging from 350-400 mm in the east and 100-200 mm in the west. Annual evaporation is 2000-2900 mm. The soil is mainly chestnut-calcareous loam. The Hunshandake Sandy Land is distributed in Chifeng City, Tongliao City, Hinggan League, and Xilingol League in Inner Mongolia, covering an area of ​​approximately 52,000 square kilometers. Due to its large area and severe desertification, it has a significant impact on the lives of farmers and herders in the surrounding areas. Furthermore, the scarcity of rainfall and water resources has led to a reduction in plant biodiversity.

[0003] In recent years, with the continuous strengthening of desertification control efforts, the Hunshandake Sandy Land has shown a trend of "double reduction" (reduction in both water quality and environmental impact). Specifically, in the Hunshandake Sandy Land and surrounding unused land, a dust-resistant, high-efficiency photovoltaic (PV) technology route has been adopted. Large-scale PV development is being promoted in contiguous sandy areas, while distributed PV development is being promoted in residential areas on the sandy edges. It is projected that 4.5 million kilowatts of PV capacity will be installed by 2025, reaching 12 million kilowatts by 2030. However, in the long-term development process, PV panels in the sandy land have experienced problems such as wind erosion of the support structures, dust accumulation on the panel surfaces, and sand erosion. Furthermore, research indicates that under a full life-cycle assessment, PV panels emit a total of 588 kg of carbon dioxide equivalent in greenhouse gases, which is continuously increasing my country's carbon emissions. Therefore, many regions are now developing a new model of "power generation on the panels, restoration beneath the panels, and planting between the panels." This model can effectively increase land use efficiency and amplify the ecological, social, and economic benefits of the desert. However, planting under photovoltaic panels is very challenging. It requires selecting plants that are low in water consumption, have high survival rates, and are effective at stabilizing sand, while also ensuring the plants are at a suitable height to avoid obstructing sunlight from reaching the panels. Furthermore, the constant movement of sand dunes can easily cause wind erosion on the photovoltaic panel supports, and high temperatures can lead to a "hot spot effect," affecting the lifespan of the modules. These factors contribute to high construction and maintenance costs, and extreme weather conditions also pose challenges to the physical strength, endurance, and technical skills of the construction personnel.

[0004] Current technologies, while focusing on windbreak and sand fixation, do not specifically address increasing carbon and nitrogen fixation capacity or consider planting plants with strong carbon-fixing capabilities. Furthermore, there is no specific carbon fixation and sand fixation technology for the Hunshandake Sandy Land. Therefore, a carbon fixation and sand fixation technology specifically designed for the Hunshandake Sandy Land is urgently needed. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention aims to provide a method specifically for carbon and sand fixation in the Hunshandake Sandy Land, specifically a method for planting carbon and sand fixation crops under photovoltaic panels in the Hunshandake Sandy Land, comprising the following steps: S1. A large number of photovoltaic panels are installed in the Hunshandake Sandy Land; herbaceous plants and small shrubs are planted in front of the photovoltaic panels; S2. Use automatic sand barrier seeding equipment to plant shrubs and weeds in the middle and behind the photovoltaic panels; The automatic sand barrier seeding equipment includes a vehicle body, tracked wheels, a seeding device, and a sprinkler irrigation device. A box is provided on the top of the vehicle body, and several partitions are fixedly installed inside the box. The partitions divide the box into several seed troughs, and the lower end of the seed troughs is connected to a sowing device. A rotating roller is rotatably connected to the underside of the vehicle body; used to compact the soil. The sprinkler system is installed around the box.

[0006] Moreover, the box body is tilted, with the front end higher than the rear end; The sprinkler irrigation device includes a water storage tank, two water supply pipes and a main sprinkler irrigation pipe, with the water storage tank located at the front end of the tank body; The main sprinkler pipe is located on the wall of the box at the rear of the vehicle body; Two water supply pipes are led out from the left and right sides of the water storage tank and connected to the water storage tank. The two water supply pipes are respectively wrapped around the left and right ends of the tank and extended to the rear end of the tank to connect with the main sprinkler pipe. Several sprinkler heads are provided on the main sprinkler pipe.

[0007] Furthermore, the seeding device includes a material control mechanism and a feeding hopper, and the lower side of the box body has an opening that is connected to the feeding hopper; The material control mechanism is fixedly connected to the bottom of the vehicle body and located at the rear end of the hopper.

[0008] Moreover, the material control mechanism includes a baffle, a power unit, and a telescopic rod; The power unit is fixedly connected to the bottom of the vehicle body and is also fixedly connected to the baffle via a telescopic rod.

[0009] Furthermore, a discharge port is integrally connected to the lower part of the hopper, a bearing is rotatably connected to the lower part of the discharge port, and a brush is fixedly connected to the lower part of the bearing.

[0010] Furthermore, both the upper and lower ends of the hopper are open. The upper opening is square and matches the opening on the lower side of the box. The lower opening is circular. The shape and size of the baffle match the shape and size of the upper opening of the hopper and are used to open or close the discharge port. The discharge port is circular and matches the lower opening of the hopper.

[0011] Furthermore, in step S1, based on the number of seeds, the herbaceous plants are: Artemisia argyi: Podocarpus santalinus: Glycyrrhiza uralensis: Agrocybe aegypti: Leymus chinensis: Astragalus membranaceus = 8-18: 8-15: 15-23: 10-15: 35-45: 15-23; the small semi-shrubs are: Caragana microphylla: Caragana angustifolia: Trifolium repens = 8-15: 15-23: 8-15.

[0012] Furthermore, in step S2, based on the number of seeds, the shrubs are: *Caragana microphylla*: *Caragana stenoptera*: *Caragana longipes*: *Chenopodium album*: *Chenopodium chinense*: *Salix matsudana*: *Artemisia argyi*: *Caragana korshinskii*: *Thymus chinensis* = 0.1-0.5: 8-15: 15-23: 8-15: 8-15: 8-15: 8-15: 8-15: 8-15; the weeds are: *Salvia splendens*: *Erigeron tiglium*: *Mustardrum sativum*: *Erigeron tiglium* = 10-23: 15-23: 5-15: 8-18.

[0013] Furthermore, in step S2, the planting ratio of shrubs to weeds is 3-5:15-17 based on the number of seeds.

[0014] Furthermore, the planting depth of the shrubs and semi-shrubs is 2-3cm, and the spacing between plants and rows is 150-200cm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the "planting herbaceous plants and small semi-shrubs in front of the photovoltaic panels" mode, this invention selects plant species suitable for the local climate and soil conditions of the Hunshandake Sandy Land for combination. Grass species are easy to grow and cold and drought resistant, while leguminous plants have strong nitrogen and carbon fixation capabilities and well-developed root systems. The small semi-shrubs are of suitable height and can effectively avoid blocking the sunlight of the photovoltaic panels. In the "planting shrubs in the middle and behind the photovoltaic panels" mode, the selected shrubs and semi-shrubs are not only easy to grow and have deep root systems with outstanding carbon and nitrogen fixation capabilities, but their morphology and growth characteristics also ensure that they do not affect the daily maintenance work between the photovoltaic panels. The three-dimensional configuration mode of trees, shrubs and grasses provided by this invention can effectively retain soil moisture, inhibit sand dune movement, and significantly improve the comprehensive efficiency of windbreak, sand fixation and carbon fixation. With the formation and succession of vegetation communities, local precipitation conditions in the desert are expected to improve, thereby promoting plant growth and strengthening the carbon sink function of the desert ecosystem by enhancing photosynthesis, forming a virtuous ecological cycle.

[0016] 2. This invention cleverly combines windbreak and sand fixation engineering with photovoltaic industry land use. By planting adaptive vegetation under and around the photovoltaic panels, which are most susceptible to wind erosion, it can not only effectively fix the topsoil, reduce sand dune mobility, protect the photovoltaic panel support foundation from wind erosion damage, and extend the service life of the power station, but also greatly improve the utilization efficiency of land resources. Without occupying additional land, it achieves the coordinated development of ecological restoration and clean energy production, and improves the comprehensive output value and ecological benefits per unit area.

[0017] 3. This invention is specifically designed for the ecological environment characteristics of existing and planned photovoltaic power stations in the Hunshandake Sandy Land. The core of this method lies in generating electricity on the panels and repairing the underlying structures. It does not require any modification to the existing photovoltaic panel structure or the addition of additional devices. By selecting native plant species with high carbon sequestration efficiency, strong environmental adaptability, and low post-maintenance requirements, a low-intervention, near-natural plant community is constructed. This can achieve significant sand fixation and carbon increase targets while minimizing human management and maintenance investment, effectively reducing the full life cycle operation and maintenance costs of photovoltaic power stations, and providing a feasible ecological technology path for achieving dual carbon targets.

[0018] 4. The automatic seeding device for sand barriers provided by the present invention has a box body divided into several seed troughs by partitions. After the plant seeds are put into the seed troughs, different seeds can be automatically sown in separate rows. The size of the discharge port is controlled by the material control mechanism to adjust the required sowing amount. The rotation of the brush covers the seeds with soil, and at the same time, the seeds will not be swept outside the photovoltaic panel, so as to achieve efficient utilization of the seeds. Attached Figure Description

[0019] Figure 1 A schematic diagram of the automatic seeding equipment for sand barriers. Figure 1 ; Figure 2 A schematic diagram of the automatic seeding equipment for sand barriers. Figure 2 ; Figure 3 A top view of an automatic sand-seeding device; Figure 4 This is a cross-sectional view of an automatic sand barrier seeding device; Figure 5 A schematic diagram of the automatic sand barrier seeding equipment from below; Figure 6 Figure 5 Enlarged view of part A; Figure 7 This is a diagram illustrating the planting effect of the present invention.

[0020] In the diagram, the components are: vehicle body-1, partition-2, seed trough-3, material control mechanism-4, baffle-41, power unit-42, telescopic rod-43, hopper-5, discharge port-6, bearing-7, brush-8, water tank-9, water pipe-91, sprinkler main pipe-92, sprinkler nozzle-93, rotating roller-10; tracked wheels-11, box-12. Detailed Implementation

[0021] Example 1 like Figure 1-5 An automatic seeding device for sand barriers includes a vehicle body 1, tracked wheels 11, a seeding device, and a sprinkler irrigation device. A box 12 is provided on the top of the vehicle body 1. Several partitions 2 are fixedly installed inside the box 12, which divides the box 12 into several seed troughs 3. The lower end of the seed troughs 3 is connected to a sowing device. A rotating roller 10 is rotatably connected to the lower part of the vehicle body 1; used to compact the soil. The sprinkler system is installed around the housing 12.

[0022] Furthermore, the housing 12 is inclined, with the front end higher than the rear end; The sprinkler irrigation device includes a water storage tank 9, two water supply pipes 91 and a sprinkler main pipe 92, with the water storage tank 9 located at the front end of the tank body 12; The main sprinkler pipe 92 is installed on the wall of the box 12 at the rear end of the vehicle body 1; Two water supply pipes 91 are respectively led out from the left and right sides of the water storage tank 9 and connected to the water storage tank 9. The two water supply pipes 91 are respectively wrapped around the left and right ends of the tank body 12 and extended to the rear end of the tank body 12 and connected to the sprinkler irrigation main pipe 92. Several sprinkler irrigation nozzles 93 are provided on the sprinkler irrigation main pipe 92.

[0023] Furthermore, the sowing device includes a material control mechanism 4 and a feeding hopper 5, and the lower side of the box 12 is provided with an opening that is connected to the feeding hopper 5; The material control mechanism 4 is fixedly connected to the bottom of the vehicle body 1 and located at the rear end of the hopper 5.

[0024] Furthermore, the material control mechanism 4 includes a baffle 41, a power unit 42, and a telescopic rod 43; The power unit 42 is fixedly connected to the lower part of the vehicle body 1 and is fixedly connected to the baffle 41 via the telescopic rod 43.

[0025] Furthermore, a discharge port 6 is integrally connected to the lower part of the hopper 5, a bearing 7 is rotatably connected to the lower part of the discharge port 6, and a brush 8 is fixedly connected to the lower part of the bearing 7.

[0026] Furthermore, both the upper and lower ends of the hopper 5 are open. The upper opening is square and matches the opening on the lower side of the box 12. The lower opening is circular. The shape of the baffle 41 matches the shape and size of the upper opening of the hopper 5 and is used to open or close the discharge port 6. The discharge port 6 is circular and matches the lower opening of the hopper 5.

[0027] Working principle: In use, the rear end of the vehicle body 1 faces the photovoltaic panel and enters under the panel. The box 12 on the vehicle body 1 is divided into several seed slots 3 by the partition 2. After the plant seeds are placed into the seed slots 3, the seeds will automatically slide into the corresponding place of the feeding hopper 5. The size of the feeding port is controlled by the material control mechanism 4 to adjust the required sowing amount. The rotation of the brush 8 covers the seeds with soil without sweeping the seeds outside the photovoltaic panel, achieving efficient use of the seeds. Then, the rotating roller 10 is slightly compacted to prevent the seeds from being blown away by the wind. The sprinkler irrigation device achieves watering through the cooperation of the water storage tank 9, water supply pipe 91, sprinkler main pipe 92, and sprinkler head 93.

[0028] Example 2 A method for combining irrigated grass under photovoltaic panels with windbreak and sand fixation in the Hunshandake Sandy Land includes the following steps: S1. Plant herbaceous plants and small shrubs in front of the photovoltaic panels; S2. Shrubs and weeds are planted in the middle and behind the photovoltaic panel using the automatic sand barrier seeding equipment of Example 1. Further, in step S1, based on the number of seeds, the herbaceous plants are: Artemisia argyi: Eupatorium fortunei: Glycyrrhiza uralensis: Agrocybe aegypti: Leymus chinensis: Astragalus membranaceus = 8: 8: 15: 10: 35: 15; the small semi-shrubs are: Caragana microphylla: Caragana angustifolia: Trifolium repens = 8: 15: 8.

[0029] Further, in step S2, based on the number of seeds, the shrubs are: *Caragana microphylla*: *Caragana stenoptera*: *Caragana longipes*: *Chenopodium album*: *Chenopodium chinense*: *Salix matsudana*: *Artemisia argyi*: *Caragana korshinskii*: *Thymus chinensis* = 0.1:8:15:8:8:8:8:8:8; the weeds are: *Salvia splendens*: *Erigeron tiglium*: *Mustardaria pinnatifida*: *Erigeron tiglium* = 10:15:5:8.

[0030] Furthermore, in step S2, the planting ratio of shrubs to weeds is 3:15 based on the number of seeds.

[0031] Furthermore, the planting depth of the shrubs and semi-shrubs is 2 cm, and the spacing between plants and rows is 150 m.

[0032] Example 3 A method for combining irrigated grass under photovoltaic panels with windbreak and sand fixation in the Hunshandake Sandy Land includes the following steps: S1. Plant herbaceous plants and small shrubs in front of the photovoltaic panels; S2. Shrubs and weeds are planted in the middle and behind the photovoltaic panel using the automatic sand barrier seeding equipment of Example 1. Further, in step S1, based on the number of seeds, the herbaceous plants are: Artemisia argyi: Eupatorium fortunei: Glycyrrhiza uralensis: Agrocybe aegypti: Leymus chinensis: Astragalus membranaceus = 18:15:23:15:45:23; the small semi-shrubs are: Caragana microphylla: Caragana angustifolia: Trifolium repens = 15:23:15.

[0033] Further, in step S2, based on the number of seeds, the shrubs are: *Caragana microphylla*: *Caragana stenoptera*: *Prunus armeniaca*: *Chenopodium album*: *Chenopodium chinense*: *Salix matsudana*: *Artemisia argyi*: *Caragana korshinskii*: *Thymus chinensis* = 0.5: 15: 23: 15: 15: 15: 15: 15; the weeds are: *Salvia splendens*: *Erigeron canadensis*: *Mustardaria pinnatifida*: *Erigeron canadensis* = 23: 23: 15: 18.

[0034] Furthermore, in step S2, the planting ratio of shrubs to weeds is 5:17 based on the number of seeds.

[0035] Furthermore, the planting depth of the shrubs and semi-shrubs is 3cm, and the spacing between plants and rows is 200cm.

[0036] Example 4 A method for combining irrigated grass under photovoltaic panels with windbreak and sand fixation in the Hunshandake Sandy Land includes the following steps: S1. Plant herbaceous plants and small shrubs in front of the photovoltaic panels; S2. Shrubs and weeds are planted in the middle and behind the photovoltaic panel using the automatic sand barrier seeding equipment of Example 1. Further, in step S1, based on the number of seeds, the herbaceous plants are: Artemisia argyi: Eupatorium fortunei: Glycyrrhiza uralensis: Agrocybe aegypti: Leymus chinensis: Astragalus membranaceus = 15:13:20:13:40:18; the small semi-shrubs are: Caragana microphylla: Caragana angustifolia: Trifolium repens = 12:20:9.

[0037] Further, in step S2, based on the number of seeds, the shrubs are: *Caragana microphylla*: *Caragana stenoptera*: *Prunus armeniaca*: *Chenopodium album*: *Chenopodium chinense*: *Salix matsudana*: *Artemisia argyi*: *Caragana korshinskii*: *Thymus chinensis* = 0.3:12:19:11:11:11:11:11:11; the weeds are: *Salvia splendens*: *Erigeron tiglium*: *Mustardaria pinnatifida*: *Erigeron tiglium* = 18:20:10:13.

[0038] Furthermore, in step S2, the planting ratio of shrubs to weeds is 4:16 based on the number of seeds.

[0039] Furthermore, the planting depth of the shrubs and semi-shrubs is 2.5 cm, and the spacing between plants and rows is 180 cm.

[0040] Comparative Example 1 The difference between this comparative example and the embodiment is: S1. Plant shrubs and weeds in front of the photovoltaic panels; S2. Herbaceous plants and small shrubs are planted in the middle and behind the photovoltaic panel using the automatic sand barrier seeding equipment of Example 1.

[0041] Experimental Section Construction was carried out in the spring, and the survival rates of plants in Examples 2-4 and Comparative Example 1 were statistically analyzed in mid-August of the same year. The specific results are shown in Table 1 below.

[0042] Table 1 Survival Rate Statistics

[0043] The experimental data above shows that the survival rate using the technical solution of this invention can reach up to 82.2%, compared to only 50.2% in Comparative Example 1. This is because the microenvironment in front of the photovoltaic array differs significantly from that in the middle / behind the array. The area in front of the array is located on the windward side, directly exposed to prevailing winds, resulting in the strongest wind erosion. Simultaneously, sunlight is relatively abundant. This invention uses herbaceous plants combined with low-growing semi-shrubs in this location. The herbaceous plants have high density and rapid coverage, quickly forming a dense surface cover layer that effectively resists wind erosion. The low-growing semi-shrubs have strong root systems, enhancing soil stabilization, and their height does not obstruct sunlight from reaching the photovoltaic panels behind. Below the photovoltaic panels and on the leeward side (middle and behind the array), the area is shaded by the photovoltaic panels, resulting in shorter sunshine hours, reduced wind speed, lower evaporation, and better soil moisture conditions compared to the area in front of the array. However, there may also be needs for rainwater collection and mechanical operations. This invention uses taller shrubs in this area. Shrubs have more developed root systems, enabling deeper sand stabilization, and their relatively strong shade tolerance allows them to adapt to low-light environments. The survival rate of Comparative Example 1 was much lower than that of the embodiment of the present invention. The fundamental reason is that its plant configuration and spatial layout were mismatched with the actual microenvironmental conditions under the photovoltaic panel. The present invention, through the differentiated design of grass and shrub in front of the panel to fix sand and retain water, and shrubs under the panel to fix sand and carbon efficiently, gives full play to the ecological and biological characteristics of different plants, making them highly adaptable to their environment, thereby significantly improving the survival rate of plants and the overall ecological benefits.

Claims

1. A method for preventing wind and sand fixation by matching irrigation grass under a Hol Xadaqi sandy land photovoltaic panel, characterized in that, It comprises the following steps: S1, planting herbaceous plants and small shrubs in front of the photovoltaic panel; S2, planting shrubs and weeds in the middle and back of the photovoltaic panel by using sand barrier automatic seeding equipment; The sand barrier automatic seeding equipment comprises a vehicle body (1), track wheels (11), a seeding device and a sprinkling irrigation device; A box body (12) is arranged above the vehicle body (1), a plurality of partition plates (2) are fixedly arranged in the box body (12), the box body (12) is divided into a plurality of seed grooves (3) by the plurality of partition plates (2), and the lower end of the seed groove (3) is connected with the seeding device; A rotating rod (10) is rotatably connected below the vehicle body (1); The sprinkling irrigation device is arranged around the box body (12).

2. The method according to claim 1, wherein, The box body (12) is arranged in an inclined manner, the front end is higher, and the rear end is lower; The sprinkling irrigation device comprises a water storage tank (9), two water delivery pipes (91) and a sprinkling irrigation main pipe (92), the water storage tank (9) is arranged at the front end of the box body (12); The sprinkling irrigation main pipe (92) is arranged on the box wall of the box body (12) at the rear end of the vehicle body (1); The two water delivery pipes (91) are respectively led out from the left and right sides of the water storage tank (9) and are in communication with the water storage tank (9), the two water delivery pipes (91) are respectively arranged around the left and right ends of the box body (12) and extend to the rear end of the box body (12) and are connected with the sprinkling irrigation main pipe (92); a plurality of sprinkling irrigation nozzles (93) are arranged on the sprinkling irrigation main pipe (92).

3. The method according to claim 1, wherein the method further comprises the steps of: planting grasses under the photovoltaic panels; and planting windbreaks around the photovoltaic panels. The seeding device comprises a material control mechanism (4) and a lower hopper (5), one side of the lower side of the box body (12) is provided with an opening and is in communication with the lower hopper (5); The material control mechanism (4) is fixedly connected below the vehicle body (1) and is located at one side of the lower hopper (5).

4. The method according to claim 3, wherein the method further comprises the steps of: planting grasses under the photovoltaic panels; and planting windbreaks around the photovoltaic panels. The material control mechanism (4) comprises a baffle (41), a power device (42) and an extension rod (43); The power device (42) is fixedly connected below the vehicle body (1) and is fixedly connected with the baffle (41) through the extension rod (43).

5. The method according to claim 4, wherein the method further comprises the steps of: planting grasses under the photovoltaic panels; and planting windbreaks around the photovoltaic panels. An outlet (6) is integrally connected below the lower hopper (5), a bearing (7) is rotatably connected below the outlet (6), and a brush (8) is fixedly connected below the bearing (7).

6. The method according to claim 5, wherein the method further comprises the steps of: planting grasses under the photovoltaic panels; and planting windbreaks around the photovoltaic panels. The upper and lower ends of the lower hopper (5) are both in an open shape, the upper end opening is square and is arranged to be matched with the opening of the lower side of the box body (12); the lower end opening is circular; the shape of the baffle (41) is matched with the shape and size of the upper end opening of the lower hopper (5), the baffle (41) is used for opening or closing the outlet (6), and the outlet (6) is circular and is matched with the lower end opening of the lower hopper (5).

7. The method according to claim 1, wherein the method is characterized in that, In the step S1, according to the seed particle number, the herbaceous plants are as follows: Artemisia arenaria: Agriophyllum arenarium: Glycyrrhiza uralensis: Agropyron cristatum: Leymus chinensis: Hedysarum boreale = 8-18: 8-15: 15-23: 10-15: 35-45: 15-23; The small shrubs are as follows: Caragana microphylla: Caragana stenophylla: Ceratoides arborescens = 8-15: 15-23: 8-15.

8. The method according to claim 1, wherein the method is characterized in that, In the step S2, the shrubs are, according to the seed grain number, Caragana microphylla: Caragana jubata: Caragana stenophylla: Amygdalus pedunculata: Ceratoides arborescens: Salix gordejevii: Artemisia giraldii: Caragana korshinskii: Thymus vulgaris = 0.1-0.5: 8-15: 15-23: 8-15: 8-15: 8-15: 8-15: 8-15: 8-15; and the weeds are, Agriophyllum arenarium: Anabasis aphylla: Eutrema japonicum: Salsola collum: 10-23: 15-23: 5-15: 8-18.

9. The method according to claim 1, wherein the method is characterized in that, In the step S2, the shrub and weed planting ratio is, according to the seed grain number, shrub: weed 3-5: 15-17.

10. The method according to claim 9, wherein the method further comprises the steps of: planting grasses under the photovoltaic panels; and planting windbreaks around the photovoltaic panels. The planting depth of the shrubs and small shrubs is 2-3 cm, and the plant spacing is 150-200 cm.

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