Method for accelerating restoration of ecological system in photovoltaic region
By sowing leguminous and grass seeds in the photovoltaic area, adding earthworms and ants, tilling the soil, and planting shrubs, the problem of ecosystem damage caused by photovoltaic construction has been solved, soil fertility has been improved, vegetation coverage has been increased, and the rapid recovery of the ecosystem has been promoted.
Patent Information
- Application Number
- CN202410514758.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-10-28
AI Technical Summary
The construction of photovoltaic power generation projects in the central and western regions has damaged the ecosystem, especially the soil and vegetation, resulting in a long self-recovery process in ecologically fragile areas. Existing technologies mainly focus on vegetation restoration while neglecting the restoration of soil ecosystems.
By employing a synergistic approach involving soil microorganisms, soil animals, and vegetation, leguminous and gramineous grass seeds were sown in the photovoltaic area, topsoil and earthworms and ants were added, and soil tillage and shrub planting were carried out to promote the recovery of soil microorganisms and vegetation reconstruction.
It significantly improved soil fertility in the photovoltaic area, increased plant diversity and vegetation coverage, and accelerated the process of ecosystem restoration.
Smart Images
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Figure BDA0004813023390000051
Abstract
Description
Technical Field
[0001] This invention belongs to the field of ecological restoration and relates to a method for accelerating the restoration of photovoltaic area ecosystems. Background Technology
[0002] my country's central and western regions are rich in solar energy resources with broad prospects for development and utilization. However, the large-scale construction of photovoltaic power generation projects will damage the original ecosystems, soil, and vegetation, especially in the ecologically fragile central and western regions where the self-recovery process of the damaged ecosystems is lengthy. Ecosystem restoration is a pressing issue that needs to be addressed in photovoltaic construction. Previous ecosystem restoration technologies mainly focused on planting vegetation in the areas where power plants are built, attempting to restore and rebuild the ecosystem by configuring different types of vegetation, without considering soil and soil ecology. Summary of the Invention
[0003] The purpose of this invention is to provide a method for accelerating the restoration of ecosystems in photovoltaic areas. This invention not only re-establishes vegetation in photovoltaic areas but also comprehensively restores soil fertility and the soil ecosystem. Specifically, this invention comprehensively considers environmental factors in photovoltaic areas and restores the regional ecosystem through a synergistic approach involving soil microorganisms, soil animals, and vegetation.
[0004] In one aspect, the present invention provides a method for accelerating the restoration of ecosystems in photovoltaic areas, comprising the following steps:
[0005] (1) Before the construction area of the photovoltaic power station is destroyed, the topsoil of the construction area shall be stripped;
[0006] (2) Mix the seeds of legumes and grasses in a ratio of 1-3:1 (e.g., 1:1, 2:1, 3:1, or any ratio and range between these ratios) to obtain a seed mixture. Sow the mixture in the construction area in May-June of the same year after the construction of the photovoltaic power station is completed (i.e., after the photovoltaic panels are laid in the construction area).
[0007] (3) In October of the same year, after the stripped topsoil was evenly spread in the construction area, the construction area was tilled to mix the topsoil (as a fungicide) with the planted legumes and grasses (as green manure) in the soil. Two-year-old shrubs were then planted in rows in the construction area, and a mixture of legume and grass seeds was sown between the rows (e.g., row sowing) in the space between the rows. The ratio of the amount of legume and grass seeds sown was (1-3):1 (e.g., 1:1, 2:1, 3:1, or any ratio and range between these ratios).
[0008] (4) In July-August of the following year, earthworms and ants were added to the soil in the construction area;
[0009] The photovoltaic area and the construction area both refer to the area where photovoltaic arrays are laid, which includes both the area under the photovoltaic panels and the area between the photovoltaic panels.
[0010] In some implementations, the topsoil in the above method refers to soil with a thickness of 0-10 cm, which contains abundant microorganisms and can be used as a primary soil microbial bank or inoculant.
[0011] In some embodiments, the method of stripping the topsoil in any of the above methods may include: stripping the topsoil of the construction area at a ratio of 0.5-1.5 square meters per 100 square meters (e.g., 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 square meters per 100 square meters, or any ratio and range between these ratios), and may also include the step of mixing all the stripped topsoil.
[0012] In some embodiments, in any of the methods described above, in steps (2) and (3), the legume is selected from one or more of Astragalus adsurgens Pall., alfalfa (Medicago sativa L.), and sweet clover (Melilotus officinalis (L.) Pall.).
[0013] In some implementations, in any of the above methods, in steps (2) and (3), the legumes are three kinds: alfalfa, clover and sweet clover. Preferably, the three legumes have the same number of seeds, that is, the ratio of the number of seeds of the three is 1:1:1.
[0014] In some embodiments, in any of the methods described above, in steps (2) and (3), the grass is selected from one or more of ryegrass (Lolium perenne L.), oat (Avena sativa L.), and crested wheatgrass (Elymus dahuricus Turcz.).
[0015] In some implementations, in any of the methods described above, in steps (2) and (3), the grasses are ryegrass, oats and crested wheatgrass. Preferably, the three grasses have the same number of seeds, that is, the ratio of the number of seeds of the three is 1:1:1.
[0016] In some embodiments, in any of the methods described above, in steps (2) and (3), the sowing density of the grass seed mixture is 10-15 g / m². 2 For example, 10, 11, 12, 13, 14, 15 g / m 2 , or the value and range between any two of these values.
[0017] In some embodiments, in any of the methods described above, in step (3), the two-year-old shrub is one or more of Caragana alba, Rosa przewalskii, and Amorpha fruticosa L.
[0018] In some implementations, in any of the methods described above, in step (3), the two-year-old shrubs are three species: Caragana korshinskii, Rosa rugosa, and Amorpha fruticosa. The planting order of Caragana korshinskii, Rosa rugosa, and Amorpha fruticosa can be arbitrary, preferably in a three-row cycle, with Caragana korshinskii, Rosa rugosa, and Amorpha fruticosa planted in the three rows of each cycle, and the Caragana korshinskii, Rosa rugosa, and Amorpha fruticosa planted alternately in these three rows, without a fixed order. For example, they can be planted in a row of Caragana korshinskii, a row of Rosa rugosa, and a row of Amorpha fruticosa, with a row spacing of 1-3 meters (e.g., 1, 2, or 3 meters, or any two or more of these values), and the plant spacing in each row is 0.2-0.5 meters (e.g., 0.2, 0.3, 0.4, or 0.5 meters, or any two or more of these values).
[0019] In some implementations, in any of the methods described above, in step (4), the earthworm is Beixing No. 2.
[0020] In some implementations, in any of the methods described above, in step (4), the amount of earthworms added is 20-50 g / m³. 2 For example, 20, 25, 30, 35, 40, 45, 50 g / m 2 , or the value and range between any two of these values.
[0021] In some implementations, in any of the methods described above, in step (4), the ant is a black ant (Polyrhachis vicina Roger).
[0022] In some implementations, in any of the methods described above, in step (4), the amount of ants added is 5-20 g / m³. 2 For example, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 g / m 2 , or the value and range between any two of these values.
[0023] In another aspect, the present invention also provides the application of any of the methods described above in improving soil, enhancing plant diversity, increasing vegetation cover, promoting plant growth, and / or accelerating the restoration of photovoltaic regional ecosystems.
[0024] This invention utilizes a synergistic approach involving soil microorganisms, soil animals, and vegetation to restore the ecosystem in photovoltaic areas. This approach can accelerate the restoration of photovoltaic ecosystems, significantly improve soil fertility, and substantially increase plant diversity and vegetation coverage. Detailed Implementation
[0025] Unless otherwise specified, the experimental methods used in the following examples are conventional methods.
[0026] Unless otherwise specified, all materials and reagents used in the following examples are commercially available.
[0027] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.
[0028] The seeds of Astragalus adsurgens Pall., alfalfa (Medicago sativa L.), sweet clover (Melilotus officinalis (L.) Pall.), ryegrass (Lolium perenne L.), oats (Avenasativa L.), and crested wheatgrass (Elymus dahuricus Turcz.) are all products of the Wuchagou Forestry Bureau in Xing'an League.
[0029] The earthworm is Beixing No. 2.
[0030] The ant is a black ant (Polyrhachis vicina Roger).
[0031] In the following embodiments, in the artificial restoration area, the legumes *Saphagus simonii*, *Alfalfa*, and *Sweet clover* have the same number of grass seeds (i.e., the ratio of the number of grass seeds among the three is 1:1:1), and the grasses *Lolium rupens*, *Oat*, and *Leymus chinensis* have the same number of grass seeds (i.e., the ratio of the number of grass seeds among the three is 1:1:1).
[0032] Example 1
[0033] Test conditions description
[0034] A photovoltaic power station in central my country is located in an arid and semi-arid region with an annual precipitation of 200-300 mm.
[0035] Experimental protocol
[0036] I. There are two test areas: one artificial repair area and one control area. Each test area is 100m long and 100m wide.
[0037] 1. Artificial restoration area:
[0038] (1) When the photovoltaic power station is about to start construction, before laying the photovoltaic panels, the topsoil (0-10cm) of the artificial restoration area is stripped at a ratio of 1 square meter stripped for every 100 square meters. All the stripped topsoil is mixed and stored.
[0039] (2) In March, after the construction of the photovoltaic power station was completed, photovoltaic panels were fully laid on the artificial restoration area;
[0040] (3) In May of the same year, the seeds of legumes (Astragalus adsurgens Pall., alfalfa (Medicago sativa L., and melilotus officinalis (L.) Pall.)) and grasses (Lolium perenne L., oats (Avena sativa L., and Elymus dahuricus Turcz.)) were mixed at a seed ratio of 2:1 to obtain a seed mixture. This mixture was then sown in rows in the artificial restoration area at a density of 12 g / m². 2 The water used to clean the photovoltaic panels is used to water the plants regularly, without fertilizing or weeding.
[0041] (4) In October of the same year, the stripped topsoil (used as the original soil microbial bank, mainly containing Bacillus and Ascomycota according to 16S bacterial and ITS fungal tests) was evenly spread in the artificial remediation area. The artificial remediation area was then tilled to incorporate the topsoil with the herbaceous plants planted in May (as green manure). Two-year-old shrubs of Caragana alba, Rosa przewalskii, and Amorpha fruticosa L. were then planted in the artificial remediation area in a row of Caragana alba, a row of Rosa przewalskii, and a row of Amorpha fruticosa L., with a row spacing of 2 meters and a plant spacing of 0.3 meters. Leguminosae (Astragalus adsurgens Pall.), alfalfa (Medicago sativa L.), and melilotus were then planted. The seeds of *L. officinalis* (L.) Pall. and grasses (*Lolium perenne* L., *Avena sativa* L., and *Elymus dahuricus* Turcz.)) were mixed at a seed ratio of 2:1 to obtain a seed mixture. This mixture was then sown in rows at a density of 12 g / m². 2 ;
[0042] (5) In July of the following year, during the peak plant growth period, large soil animals such as earthworms and ants were added to the soil in the artificial remediation area. The amount of earthworms added was 25 g / m³. 2 The amount of ants added was 10g / m³. 2 .
[0043] 2. Control area:
[0044] (1) In March, after the construction of the photovoltaic power station was completed, the control area was completely covered with photovoltaic panels;
[0045] (2) In May of the same year, alfalfa seeds were sown in rows only in the control area at a sowing density of 12 g / m². 2 .
[0046] II. Sample Collection
[0047] In July of the third year, soil samples were collected from the artificial remediation area and the control area. Following the "S"-shaped sampling method, samples were randomly collected from each area, with 25 1m × 1m quadrats set up in each area. Soil samples were collected from each quadrat, totaling 75 samples per area. The soil samples were sieved through a 2mm sieve, air-dried, and stored at 4℃ for soil physicochemical property analysis. Each quadrat was photographed and the vegetation cover within the quadrat was recorded.
[0048] III. Results and Analysis
[0049] 1. Soil physicochemical properties
[0050] Methods: Soil pH was determined using the 2.5:1 soil-water ratio-acidity meter method; organic carbon was determined using the potassium dichromate-concentrated sulfuric acid oil bath method; total nitrogen was determined using the Kjeldahl nitrogen analyzer; available phosphorus was determined using sodium bicarbonate extraction-molybdenum antimony colorimetric method; and available potassium was determined using ammonium acetate extraction-flame photometry method.
[0051] Results: The soil pH in the artificially remediated area was 8.36, organic carbon was 8.34 g / kg, total nitrogen was 0.63 g / kg, available phosphorus was 10.73 mg / kg, and available potassium was 303.72 mg / kg; the soil pH in the control area was 8.71, organic carbon was 4.99 g / kg, total nitrogen was 0.38 g / kg, available phosphorus was 7.68 mg / kg, and available potassium was 220.52 mg / kg.
[0052] This indicates that the soil fertility in the artificially remediated area was significantly improved compared to the control area.
[0053] 2. Plant diversity and vegetation cover
[0054] The number of vegetation species in the artificially restored area increased to 20 (as shown in Table 1), and the vegetation coverage reached 80%, while the vegetation coverage in the control area was only 40%.
[0055] This indicates that the restoration of artificially restored areas has promoted the development of the ecosystem towards a more stable direction.
[0056] Table 1
[0057]
[0058]
Claims
1. A method for accelerating the restoration of ecosystems in photovoltaic areas, comprising the following steps: (1) Before the construction area of the photovoltaic power station is destroyed, the topsoil of the construction area shall be stripped; (2) Mix the seeds of legumes and grasses at a ratio of (1-3):1 to obtain a seed mixture, and sow it in the construction area in May-June of the same year after the construction of the photovoltaic power station is completed. (3) In October of the same year, the stripped topsoil was evenly spread in the construction area, and the construction area was plowed to mix the topsoil with the planted legumes and grasses. Two-year-old shrubs were then planted in rows in the construction area, and a mixture of legume and grass seeds was sown between the rows. The ratio of the amount of legume and grass seeds sown was (1-3):
1. (4) In July-August of the second year, earthworms and ants were added to the soil in the construction area.
2. The method according to claim 1, characterized in that: In steps (2) and (3), the legume is selected from one or more of the following: Astragalus adsurgens Pall., alfalfa (Medicago sativa L.), and sweet clover (Melilotus officinalis (L.) Pall.).
3. The method according to claim 1 or 2, characterized in that: In steps (2) and (3), the grass plant is selected from one or more of ryegrass (Lolium perenne L.), oat (Avena sativa L.), and crested wheatgrass (Elymus dahuricus Turcz.).
4. The method according to any one of claims 1-3, characterized in that: In steps (2) and (3), the sowing density of the grass seed mixture is 10-15 g / m². 2 .
5. The method according to any one of claims 1-4, characterized in that: In step (3), the two-year-old shrub is one or more of Caragana alba, Rosa chinensis, and Amorpha fruticosa L.
6. The method according to any one of claims 1-5, characterized in that: In step (4), the earthworm is Beixing No.
2.
7. The method according to any one of claims 1-6, characterized in that: In step (4), the amount of earthworms added is 20-50 g / m³. 2 .
8. The method according to any one of claims 1-7, characterized in that: In step (4), the ant is a black ant (Polyrhachis vicina Roger).
9. The method according to any one of claims 1-8, characterized in that: In step (4), the amount of ants added is 5-20 g / m³. 2 .
10. The application of the method according to any one of claims 1-9 in improving soil, enhancing plant diversity, increasing vegetation cover, promoting plant growth, and / or accelerating the restoration of photovoltaic area ecosystems.