CN116848988A - Ecological environment restoration method suitable for photovoltaic power station in sand blown region - Google Patents
Ecological environment restoration method suitable for photovoltaic power station in sand blown region Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/198—Graphene oxide
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- C12N1/20—Bacteria; Culture media therefor
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- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/14—Enzymes or microbial cells immobilised on or in an inorganic carrier
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/07—Bacillus
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Abstract
The invention relates to the technical field of ecological environment restoration, and discloses an ecological environment restoration method suitable for a photovoltaic power station in a sand blown region. The method comprises the steps of ridging sand in a region where a photovoltaic power station is located to form a sand ridge region and a planting region; mineralizing the sand ridge area and the planting area for one time, and reducing the mobility of the surface soil layer; manufacturing a wind shielding wall on the sand ridge area, and mineralizing the sand ridge area for at least 2 times; after the cold-resistant drought-resistant plants are planted in the planting area, mineralizing the planting area, reducing the mobility of sand in the deep soil planting area, improving the water retention capacity, enhancing the shear strength of soil around the plants and ensuring the mineralization strength of sandy soil on the premise of not affecting the normal growth of the plants; in addition, mineralization is carried out on the sand ridge area for multiple times, so that the mineralization intensity of the deep soil sand ridge area is gradually improved, higher consolidation degree is formed, the shear strength of soil is increased, the defects that the traditional grass square grid technology is prone to lodging and being submerged are overcome, and the survival rate of plants is guaranteed.
Description
Technical Field
The invention relates to the technical field of ecological environment restoration, in particular to an ecological environment restoration method suitable for a photovoltaic power station in a sand blown region.
Background
The photovoltaic power generation is a clean and sustainable power generation way, and has good energy conservation and emission reduction benefits. Therefore, in recent years, the photovoltaic industry of China rapidly develops, and the wind and light resources rich in Qinghai-Tibet plateau make the photovoltaic industry become key areas for large-scale development of the photovoltaic industry of China, and meanwhile, the fragile ecological environment of the photovoltaic industry is also key areas for ecological protection and restoration of China. In addition, there is a northwest sand-blown area, and as time goes by, environmental problems begin to develop gradually, for example, the construction of a photovoltaic power station can disturb the ground surface and destroy vegetation, so that the original ecological functions of the photovoltaic power station are lost, and the land is desertified gradually.
In the existing sand fixation technology, grass square barriers (Straw Checkerboard Barrier, SCB) are dominant in desertification treatment, and the SCB technology has the advantages of simplicity in operation, low cost, quick response and the like, but has certain limitations, such as too loose sand, the straws and plants can be submerged by quicksand after being blown down under strong wind, and sand grains flow and accumulate around the straws, so that the plants possibly die due to the fact that root systems are exposed to the ground surface. Chinese patent CN110249920A discloses a method for building an ecological restoration system suitable for a photovoltaic power station and application thereof, according to different wind erosion characteristics of a research area, grass square sand barriers, gravel gland measures and red mud cover measures are adopted to effectively prevent wind sand from continuously eroding the ground surface, rural pioneer plants are planted in the grass square sand barriers, biological skinning measures are combined to quickly form a ground surface cover for ecological restoration, a management and control and monitoring mechanism is built at a later stage, and damaged ground surface restores vegetation, so that plant communities normally succession, and a stable ecological system is formed. However, sand is not cured, and plants are easily submerged in the sand and die in strong winds.
Therefore, how to improve the ecological environment restoration method of the photovoltaic power station, not only can the mineralization intensity of sandy soil be improved, but also the survival rate of plants can be ensured, and the method is a technical problem to be solved in the field.
Disclosure of Invention
In view of the above, the invention provides an ecological environment restoration method suitable for a photovoltaic power station in a sand blown region, which is nontoxic and harmless, has no secondary pollution, can improve the mineralization intensity of sandy soil, and can ensure the survival rate of plants.
In a first aspect, the invention provides an ecological environment restoration method applicable to a photovoltaic power station in a sand blown region, comprising the following steps:
(1) Ridging the sand in the region where the photovoltaic power station is located to form a sand ridge region and a planting region;
(2) Carrying out primary mineralization on the sand ridge area and the planting area, wherein the primary mineralization comprises the steps of sequentially spraying immobilized microbial inoculum and first cementing liquid;
(3) Manufacturing a wind shielding wall on the sand ridge area, and then mineralizing the sand ridge area for at least 2 times, wherein the method comprises the following steps of: sequentially drip-irrigating the first bacterial liquid, the first fixing liquid and the second cementing liquid;
(4) After planting cold-resistant drought-tolerant plants in the planting area, mineralizing the planting area, wherein the method comprises the following steps: sequentially drip-irrigating the second bacterial liquid, the second fixing liquid and the third cementing liquid;
the strain in the immobilized microbial inoculum in the step (2) is carbonate mineralization strain, and the carrier is graphene oxide with positive charges;
the strains of the first bacterial liquid in the step (3) and the second bacterial liquid in the step (4) are bacillus pasteurizus.
In an alternative embodiment, the preparation method of the immobilized microbial agent comprises the following steps: and adding the graphene oxide with positive charges into a diluent with the volume of 10 times, then inoculating the carbonate mineralized bacteria seed liquid with the inoculum size of 5%, carrying out shaking culture at 30 ℃ and 200rpm for 48-96 hours, and then carrying out freeze drying to obtain the immobilized bacteria.
In an alternative embodiment, the carbonate mineralizer is bacillus pasteurizus.
In an alternative embodiment, the immobilized microbial agent is added in an amount of 40g/m 2 ～100g/m 2 Preferably 60g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The dilution is carried out with 10 to 50 times by weight, preferably 30 times by weight, of the diluent before spraying.
In an alternative embodiment, the diluent is yeast extract 18g/L to 25g/L, ammonium sulfate 8g/L to 12g/L, and Tris13g/L to 16g/L.
In an alternative embodiment, the positively charged graphene oxide preparation method comprises: and in the presence of a solvent, sequentially adding graphene oxide, an activating agent and a functional molecule for reaction.
In an alternative embodiment, the activator is in a mass ratio of 1:0.5 to 1.5 of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysulfosuccinimide (NHS).
In an alternative embodiment, the functional molecule is Polyethylenimine (PEI).
In an alternative embodiment, the solvent is water.
In an alternative embodiment, the mass ratio of the graphene oxide to the activator is 20:0.5 to 1.5.
In an alternative embodiment, the ratio of the mass of the graphene oxide to the volume of the functional molecule is 20:1.5 to 2.5, and the proportion relation is mg/L.
In an alternative embodiment, the volume ratio of the solvent to the functional molecule is 100:1.5 to 2.5.
In an alternative embodiment, the reaction temperature is room temperature and the reaction time is 5 to 7 hours.
In an alternative embodiment, the method for preparing the first bacterial liquid and the second bacterial liquid includes: the carbonate mineralized bacteria seed liquid is stirred at the temperature of 25 ℃ to 35 ℃ for 120r/min, is inoculated into a diluent, and is fermented and cultured until the effective viable count reaches 4 multiplied by 10 9 Diluting the solution with a diluent above CFU/mL to obtain a first bacterial solution and a second bacterial solution; OD of the first bacterial liquid 600 =0.5 to 2; OD of the second bacterial liquid 600 ＝0.2～1。
In an alternative embodiment, the first cement contains 0.8M to 2.25M urea and 0.8M to 1.5M calcium chloride, preferably 1.2M calcium chloride and 1.5M urea.
In an alternative embodiment, the molar ratio of the calcium chloride to the urea in the first cement is 1:1 to 1.5.
In an alternative embodiment, the first cementing fluid is added in an amount of 3L/m 2 ～10L/m 2 Preferably 8L/m 2 。
In an alternative embodiment, the first fixing solution is a calcium chloride solution with a concentration of 0.04M to 0.08M, and the second fixing solution is a calcium chloride solution with a concentration of 0.01M to 0.04M, which plays a role in fixing cells.
In an alternative embodiment, the first bacterial liquid is added in an amount of 2L/m 2 ～6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably the OD of the first bacterial liquid 600 =1.5, added in an amount of 4L/m 2 。
In an alternative embodiment, the concentration of the first fixing solution is 0.04M to 0.08M, and the addition amount is 0.2L/M 2 ～0.6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the concentration of the first fixing solution is 0.05M, and the addition amount is 0.5L/M 2 。
In an alternative embodiment, the second cement contains 1.5M to 4.5M urea and 1.5M to 3M calcium chloride, the calcium chloride and the urea in the second cementMolar ratio 1:1 to 1.5, the addition amount of the second cementing liquid is 20L/m 2 ～30L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the concentration of calcium chloride and the concentration of urea are 2M, and the using amount is 25L/M 2 。
In an alternative embodiment, the first bacterial liquid is left to stand for 2-8 hours, preferably 5 hours, after drip irrigation; and (3) standing for 1-3 h, preferably 2h after drip irrigation of the first fixing liquid.
In an alternative embodiment, the second bacterial liquid is added in an amount of 1L/m 2 ～3L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably the OD of the second bacterial liquid 600 =0.5, added in an amount of 2L/m 2 。
In an alternative embodiment, the concentration of the second fixing solution is 0.01M to 0.04M, and the addition amount is 0.2L/M 2 ～0.6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably in an amount of 0.25L/m 2 。
In an alternative embodiment, the third cement contains 0.2M to 1.2M urea and 0.2M to 0.8M calcium chloride, and the molar ratio of the calcium chloride to the urea in the third cement is 1:1 to 1.5, the addition amount of the third cementing liquid is 20L/m 2 ～30L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the concentration of calcium chloride and the concentration of urea are both 0.5M, and the using amount is 25L/M 2 。
In an alternative embodiment, the second bacterial liquid is left to stand for 2-8 hours, preferably 5 hours, after being drip-irrigated; and (3) standing for 1-3 h, preferably 2h after drip irrigation of the second fixing liquid.
In an alternative embodiment, step (1) further comprises the step of laying an irrigation system comprising:
the main pipeline is arranged below the sand ridge area and is connected with the photovoltaic panel cleaning water tank; and, a step of, in the first embodiment,
the branch pipeline is arranged below the planting areas on two sides of the main pipeline and is communicated with the main pipeline, and a liquid outlet is formed in the branch pipeline.
In an alternative embodiment, the height of each sand ridge in the step (1) is 10 cm-30 cm, and the distance between two adjacent sand ridges is 0.5 m-1.5 m.
In an alternative embodiment, each planting area has an area of 0.25m 2 ～2.25m 2 。
In an alternative embodiment, in step (4), the shade-loving plants are grown in the photovoltaic panel shade-zone and the sun-loving plants are grown in the non-photovoltaic panel shade-zone.
Because the photovoltaic panel needs to be cleaned regularly, the invention collects the cleaning water of the photovoltaic panel, stores the cleaning water in the total water tank, and controls the irrigation system, the irrigation range and the precise irrigation according to the growth characteristics of different plants, and the precise irrigation is carried out through the water guide pipe at regular intervals and quantitatively, so that the efficient utilization of water resources is realized, and the irrigation systems of different plant planting areas can be controlled independently.
The invention combines the microbial induction carbonate precipitation technology, the grass grid technology and the negative surface under the middle photovoltaic plate and the positive surface between the photovoltaic plates under the photovoltaic power station, fully utilizes the cleaning water of the photovoltaic power station to provide a water source for an irrigation system, is different from the traditional biomineralization, combines the designs of sand ridges, partitions and the like, controls the mineralization intensity of microorganisms, ensures the effects of wind prevention and sand fixation, and provides a proper environment for vegetation restoration.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the ecological environment restoration method suitable for the photovoltaic power station in the sand wind area comprises the steps of (1) ridging the sand of the area where the photovoltaic power station is located to form a sand ridge area and a planting area; (2) Carrying out primary mineralization on the sand ridge area and the planting area, wherein the primary mineralization comprises the steps of sequentially spraying immobilized microbial inoculum and first cementing liquid; (3) Manufacturing a wind shielding wall on the sand ridge area, and then mineralizing the sand ridge area for at least 2 times, wherein the method comprises the following steps of: sequentially drip-irrigating the first bacterial liquid, the first fixing liquid and the second cementing liquid; (4) After planting cold-resistant drought-tolerant plants in the planting area, mineralizing the planting area, wherein the method comprises the following steps: sequentially drip-irrigating the second bacterial liquid, the second fixing liquid and the third cementing liquid; according to the invention, the immobilized microbial inoculum and the first cementing liquid are sprayed and mineralized, so that the mobility of a surface soil layer is reduced, and then the Pasteurella multocida bacterial liquid, the immobilized liquid and the cementing liquid are adopted for carrying out zonal drip irrigation and mineralization, so that the mobility of sand in a deep soil planting area is reduced, the water retention capacity is improved, the shear strength of soil around plants is enhanced and the mineralization strength of sandy soil is ensured on the premise that the normal growth of the plants is not influenced; in addition, mineralization is carried out on the sand ridge area for multiple times, so that the mineralization intensity of the deep soil sand ridge area is gradually improved, higher consolidation degree is formed, the shear strength of soil is increased, the defects that the traditional grass square grid technology is prone to lodging and being submerged are overcome, and the survival rate of plants is guaranteed.
The carrier of the immobilized microbial inoculum is graphene oxide with positive charges; because the surface soil is seriously sanded, the water content of the surface sandy soil is low, and microorganisms in the surface soil are difficult to colonize, the strain is fixed on the positively charged graphene oxide, so that on one hand, the positively charged graphene oxide is a good porous carrier, and can better adsorb microorganism cells, so that the activity and stability of microorganisms are improved, and the performance reduction caused by the microorganisms against adverse conditions is improved; on the other hand, the graphene can improve the water and fertilizer retention capacity, the cell antioxidant enzyme activity and the active oxygen scavenging capacity of rhizosphere soil due to the large specific surface area and rich oxygen-containing functional groups; and can improve the tolerance of plants to adversity stress. The graphene is applied to vegetation recovery in the sand-blown areas such as saline alkali, desertification, mine restoration and the like, and can effectively improve the survival rate and the preservation rate of the vegetation.
The carbonate mineralizing bacteria are bacillus pasteurizus, and can realize rapid mineralization of sandy soil.
The ecological environment restoration method provided by the invention is nontoxic, harmless and free of secondary pollution, urea in the cementing liquid and graphene in the immobilized microbial inoculum are remained in the soil in the mineralization process, so that nutrients are provided for later-period planted plants, and the water and fertilizer retaining capacity of rhizosphere soil is improved.
Detailed Description
The following examples are provided for a better understanding of the present invention and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the invention, any product which is the same or similar to the present invention, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present invention.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
In order to solve the problems in the related art, according to a first aspect of the present invention, there is provided an ecological environment restoration method for a photovoltaic power station in a windy and sandy area, comprising the steps of:
(1) Ridging the sand in the region where the photovoltaic power station is located to form a sand ridge region and a planting region;
(2) Carrying out primary mineralization on the sand ridge area and the planting area, wherein the primary mineralization comprises the steps of sequentially spraying immobilized microbial inoculum and first cementing liquid;
(3) Manufacturing a wind shielding wall on the sand ridge area, and then mineralizing the sand ridge area for at least 2 times, wherein the method comprises the following steps of: sequentially drip-irrigating the first bacterial liquid, the first fixing liquid and the second cementing liquid;
(4) After planting cold-resistant drought-tolerant plants in the planting area, mineralizing the planting area, wherein the method comprises the following steps: sequentially drip-irrigating the second bacterial liquid, the second fixing liquid and the third cementing liquid;
the strain in the immobilized microbial inoculum in the step (2) is carbonate mineralization strain, and the carrier is graphene oxide with positive charges;
the strains of the first bacterial liquid in the step (3) and the second bacterial liquid in the step (4) are bacillus pasteurizus.
In an alternative embodiment, the preparation method of the immobilized microbial agent comprises the following steps: and adding the graphene oxide with positive charges into a diluent with the volume of 10 times, then inoculating the carbonate mineralized bacteria seed liquid with the inoculum size of 5%, carrying out shaking culture at 30 ℃ and 200rpm for 48-96 hours, and then carrying out freeze drying to obtain the immobilized bacteria.
In an alternative embodiment, the carbonate mineralizer is bacillus pasteurizus.
In an alternative embodiment, the immobilized microbial agent is added in an amount of 40g/m 2 ～100g/m 2 Preferably 60g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The dilution is carried out with 10 to 50 times by weight, preferably 30 times by weight, of the diluent before spraying.
In an alternative embodiment, the diluent is yeast extract 18g/L to 25g/L, ammonium sulfate 8g/L to 12g/L, and Tris13g/L to 16g/L.
In an alternative embodiment, the positively charged graphene oxide preparation method comprises: and in the presence of a solvent, sequentially adding graphene oxide, an activating agent and a functional molecule for reaction.
In an alternative embodiment, the activator is in a mass ratio of 1:0.5 to 1.5 of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysulfosuccinimide (NHS).
In an alternative embodiment, the functional molecule is Polyethylenimine (PEI).
In an alternative embodiment, the solvent is water.
In an alternative embodiment, the mass ratio of the graphene oxide to the activator is 20:0.5 to 1.5.
In an alternative embodiment, the ratio of the mass of the graphene oxide to the volume of the functional molecule is 20:1.5 to 2.5, and the proportion relation is mg/L.
In an alternative embodiment, the volume ratio of the solvent to the functional molecule is 100:1.5 to 2.5.
In an alternative embodiment, the reaction temperature is room temperature and the reaction time is 5 to 7 hours.
In an alternative embodiment, the method for preparing the first bacterial liquid and the second bacterial liquid includes: the carbonate mineralized bacteria seed liquid is stirred at the temperature of 25 ℃ to 35 ℃ for 120r/min, is inoculated into a diluent, and is fermented and cultured until the effective viable count reaches 4 multiplied by 10 9 CFU/more than mL, diluting with a diluent with a weight multiple to obtain a first bacterial liquid and a second bacterial liquid; OD of the first bacterial liquid 600 =0.5 to 2; OD of the second bacterial liquid 600 ＝0.2～1。
In an alternative embodiment, the first cement contains 0.8M to 2.25M urea and 0.8M to 1.5M calcium chloride, preferably 1.2M calcium chloride and 1.5M urea.
In an alternative embodiment, the molar ratio of the calcium chloride to the urea in the first cement is 1:1 to 1.5.
In an alternative embodiment, the first cementing fluid is added in an amount of 3L/m 2 ～10L/m 2 Preferably 8L/m 2 。
In an alternative embodiment, the first fixing solution is a calcium chloride solution with a concentration of 0.04M to 0.08M, and the second fixing solution is a calcium chloride solution with a concentration of 0.01M to 0.04M, which plays a role in fixing cells.
In an alternative embodiment, the first bacterial liquid is added in an amount of 2L/m 2 ～6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably the OD of the first bacterial liquid 600 =1.5, added in an amount of 4L/m 2 。
In an alternative embodiment, the concentration of the first fixing solution is 0.04M to 0.08M, and the addition amount is 0.2L/M 2 ～0.6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the concentration of the first fixing solution is 0.05M, and the addition amount is 0.5L/M 2 。
In an alternative embodiment, the second cement contains 1.5M to 4.5M urea and 1.5M to 3M calcium chloride, and the molar ratio of the calcium chloride to the urea in the second cement is 1:1 to 1.5, the addition amount of the second cementing liquid is 20L/m 2 ～30L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the concentration of calcium chloride and the concentration of urea are 2M, and the using amount is 25L/M 2 。
In an alternative embodiment, the first bacterial liquid is left to stand for 2-8 hours, preferably 5 hours, after drip irrigation; and (3) standing for 1-3 h, preferably 2h after drip irrigation of the first fixing liquid.
In one placeIn an alternative embodiment, the addition amount of the second bacterial liquid is 1L/m 2 ～3L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably the OD of the second bacterial liquid 600 =0.5, added in an amount of 2L/m 2 。
In an alternative embodiment, the concentration of the second fixing solution is 0.01M to 0.04M, and the addition amount is 0.2L/M 2 ～0.6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably in an amount of 0.25L/m 2 。
In an alternative embodiment, the third cement contains 0.2M to 1.2M urea and 0.2M to 0.8M calcium chloride, and the molar ratio of the calcium chloride to the urea in the third cement is 1:1 to 1.5, the addition amount of the third cementing liquid is 20L/m 2 ～30L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the concentration of calcium chloride and the concentration of urea are both 0.5M, and the using amount is 25L/M 2 。
In an alternative embodiment, the second bacterial liquid is left to stand for 2-8 hours, preferably 5 hours, after being drip-irrigated; and (3) standing for 1-3 h, preferably 2h after drip irrigation of the second fixing liquid.
In an alternative embodiment, step (1) further comprises the step of laying an irrigation system comprising:
the main pipeline is arranged below the sand ridge area and is connected with the photovoltaic panel cleaning water tank; and, a step of, in the first embodiment,
the branch pipeline is arranged below the planting areas on two sides of the main pipeline and is communicated with the main pipeline, and a liquid outlet is formed in the branch pipeline.
In an alternative embodiment, the height of each sand ridge in the step (1) is 10 cm-30 cm, and the distance between two adjacent sand ridges is 0.5 m-1.5 m.
In an alternative embodiment, each planting area has an area of 0.25m 2 ～2.25m 2 。
In an alternative embodiment, in step (4), the shade-loving plants are grown in the photovoltaic panel shade-zone and the sun-loving plants are grown in the non-photovoltaic panel shade-zone.
Because the photovoltaic panel needs to be cleaned regularly, the cleaning water of the photovoltaic panel is collected and stored in the total water tank, and according to the growth characteristics of different plants, the water source is efficiently utilized by controlling the irrigation system, the irrigation range and the precise irrigation and regularly and quantitatively carrying out the precise irrigation through the water guide pipe; the irrigation systems of different plant growing areas can be controlled independently.
To facilitate comparison between the data, the soil to be remediated in examples 1 to 3 and comparative examples 1 to 7 was sanded soil located on Qinghai-Tibet plateau and had an area of 50m 2 。
The Bacillus pasteurellosis used in the present invention was purchased from American type culture Collection under the number ATCC 11859.
The invention is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the invention as claimed.
Example 1
The ecological environment restoration method suitable for the photovoltaic power station in the sand blown region provided by the embodiment comprises the following steps:
(1) Ridging the sand in the region of the photovoltaic power station to form a sand ridge region and a planting region, wherein the distance between two adjacent sand ridges is 1m, the height of each sand ridge is about 25cm, and the area of each planting region is 1m 2 Paving an irrigation system 20cm below the sand ridge, wherein the irrigation system comprises: the main pipeline is arranged below the sand ridge area and is connected with the photovoltaic panel cleaning water tank; the branch pipes are arranged below the planting areas at two sides of the main pipeline and are communicated with the main pipeline, a liquid outlet is formed in each branch pipe, and the distance between two adjacent branch pipes is 35cm; the main pipeline and the branch pipelines are used for conveying bacterial liquid, fixing liquid, cementing solution and irrigation water to the sand.
(2) Primary mineralization: spraying immobilized microbial inoculum to the sand ridge area and the planting area, and then spraying 8L/m 2 The first cementing liquid (the first cementing liquid comprises urea with the concentration of 1.5M and calcium chloride with the concentration of 1.2M), and the mobility of sand is reduced on the premise that plants can grow normally after single mineralization;
the preparation method of the immobilized microbial inoculum comprises the following steps:
the preparation method of the positively charged graphene oxide comprises the following steps: weighing 20mg of graphene oxide, ultrasonically dispersing the graphene oxide into 100mL of ultrapure water, adding 1mL of 0.5mg/mL of EDC and 1mL of 0.5mg/mL of NHS solution under stirring, adding 2mL of PEI solution, stirring at room temperature for reaction for 6 hours, centrifuging to remove an upper layer of solution, washing a black solid product of PEI modified graphene oxide (GO-PEI) obtained from the lower layer with ultrapure water for 3 times, and then putting the obtained GO-PEI into a vacuum drying oven for drying at 50 ℃;
adding the graphene oxide with positive charges into a diluent with the volume of 10 times, inoculating a bacillus pasteurizer seed solution with the inoculum size of 5%, carrying out shaking culture at 30 ℃ and 200rpm for 72 hours, and then carrying out freeze drying to obtain an immobilized microbial inoculum; the immobilized microbial inoculum is 60g/m before use 2 Diluting the immobilized microbial inoculum of (2) with a diluent of 30 weight times; the thinner is as follows: 22g/L of yeast extract, 10g/L of ammonium sulfate and 15g/L of Tris.
(3) And (3) inserting materials such as waste straws and the like which are trimmed in order on the sand ridge to manufacture the wind-proof wall so as to weaken the erosion of wind power.
(4) Secondary mineralization: the second mineralization is only carried out on the sand ridge area, and OD is firstly poured in 600 First bacterial liquid 4L/m=1.5 2 Standing for 5 hr, and then pouring 0.05M calcium chloride solution 0.5L/M 2 Standing for 2 hr, and then pouring 25L/m 2 The second cementing liquid (the second cementing liquid comprises urea and calcium chloride with the concentration of 2M).
(5) Third mineralization: and repeating the second mineralization process, and after the third mineralization is completed, firmly fixing the wind-shielding wall made of the waste straw on the sand ridge.
(6) After the third mineralization is finished for 18 hours, planting a shade-covered area of the photovoltaic plate of the planting area with notopterygium roots of the wedding plants, planting rhodiola rosea of the wedding plants in a non-photovoltaic plate shade-covered area of the planting area, mineralizing the planting area for the fourth time, and firstly filling OD 600 Second bacterial liquid 2L/m=0.5 2 Standing for 5 hr, and then pouring 0.03M calcium chloride solution 0.25L/M 2 Standing for 2 hr, and then pouring 25L/m 2 A third cement (the second cement comprising urea and calcium chloride at a concentration of 0.5M each);
the preparation method of the first bacterial liquid and the second bacterial liquid comprises the following steps: the bacillus pasteurizer seed liquid is stirred at 30 ℃ for 120r/min, is inoculated into a diluent, and is fermented and cultured until the effective viable count reaches 4 multiplied by 10 9 Stopping fermentation after CFU/mL is higher than the CFU/mL to obtain carbonate mineralized bacteria liquid; diluting with diluent to OD 600 =1.5, to obtain a first bacterial liquid; diluting with diluent to OD 600 =0.5, to obtain a second bacterial liquid; the thinner is as follows: 22g/L of yeast extract, 10g/L of ammonium sulfate and 15g/L of Tris.
Example 2
The ecological environment restoration method suitable for the photovoltaic power station in the sand blown region provided by the embodiment comprises the following steps:
(1) Ridging the sand in the region of the photovoltaic power station to form a sand ridge region and a planting region, wherein the distance between two adjacent sand ridges is 0.5m, the height of each sand ridge is about 10cm, and the area of each planting region is 0.25m 2 Paving an irrigation system 30cm below the sand ridge, wherein the irrigation system comprises: the main pipeline is arranged below the sand ridge area and is connected with the photovoltaic panel cleaning water tank; the branch pipes are arranged below the planting areas at two sides of the main pipeline and are communicated with the main pipeline, liquid outlets are formed in the branch pipes, and the distance between two adjacent branch pipes is 20cm; the main pipeline and the branch pipelines are used for conveying bacterial liquid, fixing liquid, cementing solution and irrigation water to the sand.
(2) Primary mineralization: spraying immobilized microbial inoculum to the sand ridge area and the planting area, and then spraying 3L/m 2 The first cementing liquid (the first cementing liquid comprises urea with the concentration of 0.8M and calcium chloride with the concentration of 0.8M), and the mobility of sand is reduced on the premise that plants can grow normally after single mineralization;
the preparation method of the immobilized microbial inoculum comprises the following steps:
the preparation method of the positively charged graphene oxide comprises the following steps: weighing 20mg of graphene oxide, ultrasonically dispersing the graphene oxide into 100mL of ultrapure water, adding 1mL of 0.5mg/mL of EDC and 1mL of 0.5mg/mL of NHS solution under stirring, adding 2mL of PEI solution, stirring at room temperature for reaction for 6 hours, centrifuging to remove an upper layer of solution, washing a black solid product of PEI modified graphene oxide (GO-PEI) obtained from the lower layer with ultrapure water for 3 times, and then putting the obtained GO-PEI into a vacuum drying oven for drying at 50 ℃;
adding the graphene oxide with positive charges into a diluent with the volume of 10 times, inoculating a bacillus pasteurizer seed solution with the inoculum size of 5%, carrying out shaking culture at 30 ℃ and 200rpm for 48 hours, and then carrying out freeze drying to obtain an immobilized microbial inoculum; the immobilized microbial inoculum is 40g/m before use 2 Diluting the immobilized microbial inoculum of (2) with a 50-weight-time diluent; the thinner is as follows: 18g/L of yeast extract, 12g/L of ammonium sulfate and 13g/L of Tris.
(3) And (3) inserting materials such as waste straws and the like which are trimmed in order on the sand ridge to manufacture the wind-proof wall so as to weaken the erosion of wind power.
(4) Secondary mineralization: the second mineralization is only carried out for the sand ridges, and OD is firstly poured in 600 First bacterial liquid 2L/m=0.5 2 Standing for 2 hr, and then pouring 0.04M calcium chloride solution 0.2L/M 2 Standing for 1 hr, and then pouring into 20L/m 2 The second cement (the second cement comprising urea at a concentration of 1.5M and calcium chloride at a concentration of 1.5M).
(5) Third to sixth mineralization: and repeating the second mineralization process, and after the third to sixth mineralization is completed, firmly fixing the wind-shielding wall made of the waste straw on the sand ridge.
(6) After the sixth mineralization is completed for 12 hours, planting a shade-covered region of the photovoltaic plate in the planting region with notopterygium roots, planting a sun-covered region of the non-photovoltaic plate in the planting region with rhodiola rosea, performing seventh mineralization on the planting region, and firstly filling OD 600 Second bacterial liquid 1L/m=0.2 2 Standing for 2 hr, and then pouring 0.01M calcium chloride solution 0.2L/M 2 Standing for 1 hr, and then pouring into 20L/m 2 A third cement (the second cement comprising urea at a concentration of 0.2M and calcium chloride at a concentration of 0.2M);
the preparation method of the first bacterial liquid and the second bacterial liquid comprises the following steps: stirring seed solution of Bacillus pasteurellosis at 25deg.C at rotation speed of 120r/min, inoculating into diluent, and fermenting until the effective viable count reaches 4×10 9 Stopping hair after CFU/mL is higherFermenting to obtain carbonate mineralized bacteria liquid; diluting with diluent to OD 600 =0.5, to obtain a first bacterial liquid; diluting with diluent to OD 600 =0.2, to obtain a second bacterial liquid; the thinner is as follows: 18g/L of yeast extract, 12g/L of ammonium sulfate and 13g/L of Tris.
Example 3
The ecological environment restoration method suitable for the photovoltaic power station in the sand blown region provided by the embodiment comprises the following steps:
(1) Ridging the sand in the region of the photovoltaic power station to form a sand ridge region and a planting region, wherein the distance between two adjacent sand ridges is 1.5m, the height of each sand ridge is about 30cm, and the area of each planting region is 2.25m 2 Paving an irrigation system 10m below the sand ridge, wherein the irrigation system comprises: the main pipeline is arranged below the sand ridge area and is connected with the photovoltaic panel cleaning water tank; the branch pipes are arranged below the planting areas at two sides of the main pipeline and are communicated with the main pipeline, liquid outlets are formed in the branch pipes, and the distance between two adjacent branch pipes is 50cm; the main pipeline and the branch pipelines are used for conveying bacterial liquid, fixing liquid, cementing solution and irrigation water to the sand.
(2) Primary mineralization: spraying immobilized microbial inoculum to the sand ridge area and the planting area, and then spraying 10L/m 2 The first cementing liquid (the first cementing liquid comprises urea with the concentration of 2.25M and calcium chloride with the concentration of 1.5M), and the mobility of sand is reduced on the premise that plants can normally grow after single mineralization;
the preparation method of the immobilized microbial inoculum comprises the following steps:
the preparation method of the positively charged graphene oxide comprises the following steps: weighing 20mg of graphene oxide, ultrasonically dispersing the graphene oxide into 100mL of ultrapure water, adding 1mL of 0.5mg/mL of EDC and 1mL of 0.5mg/mL of NHS solution under stirring, adding 2mL of PEI solution, stirring at room temperature for reaction for 6 hours, centrifuging to remove an upper layer of solution, washing a black solid product of PEI modified graphene oxide (GO-PEI) obtained from the lower layer with ultrapure water for 3 times, and then putting the obtained GO-PEI into a vacuum drying oven for drying at 50 ℃;
adding the positively charged graphene oxide to 10 times of the volumeInoculating Bacillus pasteurellosis seed solution with an inoculum size of 5%, shake culturing at 30deg.C and 200rpm for 96 hr, and lyophilizing to obtain immobilized bacteria; the immobilized microbial inoculum is 100g/m before use 2 Diluting the immobilized microbial inoculum of (2) with a 10-weight-time diluent; the thinner is as follows: 25g/L of yeast extract, 8g/L of ammonium sulfate and 13g/L of Tris.
(3) And (3) inserting materials such as waste straws and the like which are trimmed in order on the sand ridge to manufacture the wind-proof wall so as to weaken the erosion of wind power.
(4) Secondary mineralization: the second mineralization is only carried out for the sand ridges, and OD is firstly poured in 600 First bacterial liquid 6L/m of=2 2 Standing for 8 hr, and then pouring 0.08M calcium chloride solution 0.6L/M 2 Standing for 3 hr, and then pouring 30L/m 2 The second cement (the second cement comprising urea at a concentration of 3.75M and calcium chloride at a concentration of 3M).
(5) Third, fourth mineralization: and repeating the second mineralization process, and after the third mineralization and the fourth mineralization are completed, firmly fixing the wind-shielding wall made of the waste straw on the sand ridge.
(6) After the fourth mineralization is completed for 24 hours, planting a shade-covered area of the photovoltaic plate of the planting area with notopterygium roots of the wedding plants, planting rhodiola rosea of the wedding plants in a non-photovoltaic plate shade-covered area of the planting area, carrying out fifth mineralization on the planting area, and firstly filling OD 600 Second bacterial liquid 3L/m of=1 2 Standing for 8 hr, and then pouring 0.04M calcium chloride solution 0.6L/M 2 Standing for 3 hr, and then pouring 30L/m 2 A third cement (the third cement comprising urea at a concentration of 1.2M and calcium chloride at a concentration of 0.8M);
the preparation method of the first bacterial liquid and the second bacterial liquid comprises the following steps: stirring seed solution of Bacillus pasteurellosis at 35deg.C at rotation speed of 120r/min, inoculating into diluent, and fermenting until the effective viable count reaches 4×10 9 Stopping fermentation after CFU/mL is higher than the CFU/mL to obtain carbonate mineralized bacteria liquid; diluting with diluent to OD 600 =2, obtaining a first bacterial liquid; diluting with diluent to OD 600 =1, obtaining a second bacterial liquid; the thinner is as follows: yeast extract 18g/L, ammonium sulfate 12g/L and Tris 16g/L。
Comparative example 1
The ecological environment restoration method applicable to the photovoltaic power station in the sand blown region provided by the comparative example is basically the same as the reaction condition of the embodiment 1, and the only difference is that the third mineralization step is omitted.
Comparative example 2
The method for restoring the ecological environment, which is applicable to the photovoltaic power station in the sand blown region and provided by the comparative example, is basically the same as the reaction condition of the embodiment 1, and the only difference is that the fourth mineralization step is omitted.
Comparative example 3
The ecological environment restoration method applicable to the photovoltaic power station in the sand blown region provided by the comparative example is basically the same as the reaction conditions of the embodiment 1, and the only difference is that the immobilized microbial inoculum is replaced by the carbonate mineralized microbial inoculum.
Comparative example 4
The ecological environment restoration method applicable to the photovoltaic power station in the sand blown region provided by the comparative example is basically the same as the reaction conditions of the embodiment 1, and the difference is that the immobilized microbial inoculum is adopted to replace the carbonate mineralization microbial inoculum in the step (4), the step (5) and the step (6).
Comparative example 5
The method for restoring the ecological environment of the photovoltaic power station in the sand blown region, which is provided by the comparative example, is basically the same as the reaction condition of the embodiment 1, and is different in that the subarea mineralization is not performed, and the first, second, third and fourth mineralization is simultaneously performed on the sand ridge region and the planting region.
Comparative example 6
The method for restoring the ecological environment of the photovoltaic power station in the windy and sandy area provided by the comparative example is basically the same as the reaction condition of the embodiment 1, and is only different in that the sequence of the fourth mineralization and the second mineralization is changed, namely plants are planted first, and after the fourth mineralization, a wind shielding wall is manufactured to carry out the second mineralization and the third mineralization.
Comparative example 7
The ecological environment restoration method applicable to the photovoltaic power station in the sand blown region provided by the comparative example is basically the same as the reaction conditions of the embodiment 1, and the only difference is that graphene oxide is adopted to replace positively charged graphene oxide.
Experimental example 1
Shear strength tests were performed on the repaired sand ridge areas and the repaired planting areas in the above examples and comparative examples, and survival rate results of the notopterygium roots and rhodiola rosea in the planting areas are shown in table 1.
Table 1 survival rates of Notopterygii rhizoma and radix Rhodiolae in examples and comparative examples
From the table, the shear strength of the sand ridges in examples 1 to 3 is 1.37-1.42 MPa, the shear strength of the planting area is 0.43-0.55 MPa, the survival rate of the notopterygium root is 71-74%, and the survival rate of the rhodiola root is 80-83%.
The shear strength of the sand ridge area in comparative example 1 is 0.77MPa, the shear strength of the planting area is 0.52MPa, the survival rate of notopterygium root is 47%, and the survival rate of rhodiola rosea is 52%, which shows that the shear strength of the sand ridge area is lower after omitting the third mineralization step, so that the wind-proof capacity is reduced, and the survival rate of plants is reduced.
Comparative example 2 has a shear strength of 1.41MPa in the sand ridge region, a shear strength of 0.2MPa in the planting region, a survival rate of 53% of notopterygium root, and a survival rate of 70% of rhodiola rosea, which indicates that omitting the fourth mineralization step, the shear strength of the sand soil in the planting region is not further enhanced in the planting of young plants, thereby resulting in a decrease in the survival rate of plants.
The shear strength of the sand ridge area in comparative example 3 is 1.41MPa, the shear strength of the planting area is 0.57MPa, the survival rate of notopterygium root is 61%, and the survival rate of rhodiola rosea is 70%, which shows that the carbonate mineralization bacteria liquid is adopted to replace the immobilized bacteria agent mineralized for the first time in example 1, the shear strength of the planting area and the sand ridge area reach the same level as that of example 1, but the survival rate of plants is slightly reduced, which shows that the immobilized bacteria agent is used in the surface soil of the planting area, so that a good living environment can be provided for microorganisms, and meanwhile, the graphene oxide improves the tolerance of plants to adversity stress.
Comparative example 4 shear strength of the sand ridge area is 0.13MPa, shear strength of the planting area is 0.08MPa, survival rate of notopterygium root is 30%, survival rate of rhodiola rosea is 44%, immobilized microbial inoculum is adopted to replace carbonate mineralization bacterial liquid in the steps (4), (5) and (6) of the embodiment 1, drip irrigation pipelines are blocked, drip irrigation mineralization effect is poor, and shear strength of the sand ridge area and planting is substantially lower than that of the embodiment 1, so that survival rate of plants is low.
Comparative example 5 has a shear strength of 1.44MPa in the sand ridge region, a shear strength of 1.45MPa in the planting region, a survival rate of 17% of notopterygium root, and a survival rate of 28% of rhodiola rosea, which means that the first, second, third and fourth mineralizations are performed on the sand ridge region and the planting region simultaneously without partition mineralization, resulting in excessive mineralization in the planting region and low survival rate of plants.
Comparative example 6 the shear strength of the sand ridge area is 1.39MPa, the shear strength of the planting area is 0.52MPa, the survival rate of notopterygium root is 31%, and the survival rate of rhodiola rosea is 43%, which means that the sequence of the fourth mineralization and the second mineralization is changed, i.e. plants are planted first, at this time the windproof wall of the sand ridge area does not reach enough shear strength yet, and the windproof and sand-fixing effects cannot be achieved, so that the survival rate of plants is low.
Comparative example 7 has shear strength of 1.03MPa in the sand ridge region, shear strength of 0.35MPa in the planting region, survival rate of 55% of notopterygium root and survival rate of 68% of rhodiola root, which indicates that the adoption of graphene oxide to replace positively charged graphene oxide leads to poor colonization effect of microorganisms in immobilized microbial agents, and the shear strength of the planting region and the sand ridge region is reduced, so that the survival rate of plants is reduced.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. The ecological environment restoration method suitable for the photovoltaic power station in the sand blown region is characterized by comprising the following steps of:
(1) Ridging the sand in the region where the photovoltaic power station is located to form a sand ridge region and a planting region;
(2) Carrying out primary mineralization on the sand ridge area and the planting area, wherein the primary mineralization comprises the steps of sequentially spraying immobilized microbial inoculum and first cementing liquid;
(3) Manufacturing a wind shielding wall on the sand ridge area, and then only mineralizing the sand ridge area for at least 2 times respectively comprises the following steps: sequentially drip-irrigating the first bacterial liquid, the first fixing liquid and the second cementing liquid;
(4) After planting cold-resistant drought-tolerant plants in the planting area, mineralizing the planting area, wherein the method comprises the following steps: sequentially drip-irrigating the second bacterial liquid, the second fixing liquid and the third cementing liquid;
the strain in the immobilized microbial inoculum in the step (2) is carbonate mineralization strain, and the carrier is graphene oxide with positive charges;
the strains of the first bacterial liquid in the step (3) and the second bacterial liquid in the step (4) are bacillus pasteurizus.
2. The ecological environment restoration method suitable for a photovoltaic power station in a sand blown region according to claim 1, wherein the preparation method of the immobilized microbial inoculum comprises the following steps: inoculating carbonate mineralized bacteria seed liquid into a diluent containing graphene oxide with positive charges, performing shaking culture for 48-96 hours, and performing freeze drying to obtain an immobilized bacteria agent; and/or the number of the groups of groups,
the carbonate mineralization bacteria are bacillus pastoris; and/or the number of the groups of groups,
the addition amount of the immobilized microbial inoculum is 40g/m 2 ～100g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Before spraying, diluting with 10-50 times of diluent;
the diluent is 18g/L to 25g/L of yeast extract, 8g/L to 12g/L of ammonium sulfate and 13g/L to 16g/L of Tris;
the preparation method of the positively charged graphene oxide comprises the following steps: sequentially adding graphene oxide, an activating agent and functional molecules in the presence of a solvent for reaction;
the mass ratio of the activator is 1:0.5 to 1.5 of 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysulfosuccinimide; and/or the number of the groups of groups,
the functional molecule is polyethyleneimine; and/or the number of the groups of groups,
the solvent is water; and/or the number of the groups of groups,
the mass ratio of the graphene oxide to the activator is 20:0.5 to 1.5; and/or the number of the groups of groups,
the volume ratio of the graphene oxide mass to the functional molecule is 20:1.5 to 2.5, and the proportion relation is mg/L; and/or the number of the groups of groups,
the volume ratio of the solvent to the functional molecule is 100:1.5 to 2.5; and/or the number of the groups of groups,
the reaction temperature is room temperature, and the reaction time is 5-7 h.
3. The ecological environment restoration method suitable for a photovoltaic power station in a sand blown region according to claim 1, wherein the preparation method of the first bacterial liquid and the second bacterial liquid comprises the following steps: inoculating carbonate mineralized bacteria seed liquid into diluent, fermenting and culturing until the effective viable count reaches 4×10 9 Diluting the CFU/mL with a diluent to obtain a first bacterial liquid and a second bacterial liquid;
OD of the first bacterial liquid 600 =0.5 to 2; OD of the second bacterial liquid 600 ＝0.2～1。
4. The method for restoring ecological environment of photovoltaic power station in sandstorm area according to claim 1, wherein the first cementing liquid contains 0.8-2.25M urea and 0.8-1.5M calcium chloride; and/or the number of the groups of groups,
the molar ratio of the calcium chloride to the urea in the first cementing liquid is 1:1 to 1.5; and/or the number of the groups of groups,
the addition amount of the first cementing liquid is 3L/m 2 ～10L/m 2 。
5. The method for restoring ecological environment of photovoltaic power station in sandstorm area according to claim 1, wherein the first fixing liquid and the second fixing liquid are both calcium chloride solutions.
6. The ecological environment restoration method for a photovoltaic power station in a sandstorm area according to claim 1 or 3, wherein the addition amount of the first bacterial liquid is 2L/m 2 ～6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the concentration of the first fixing solution is 0.04-0.08M, and the adding amount is 0.2L/M 2 ～0.6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the second cementing liquid contains 1.5-4.5M of urea and 1.5-3M of calcium chloride, and the molar ratio of the calcium chloride to the urea in the second cementing liquid is 1:1 to 1.5, the addition amount of the second cementing liquid is 20L/m 2 ～30L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
standing for 2-8 h after drip irrigation of the first bacterial liquid; and standing for 1-3 h after drip irrigation of the first fixing liquid.
7. The ecological environment restoration method for a photovoltaic power station in a sandstorm area according to claim 1 or 3, wherein the addition amount of the second bacterial liquid is 1L/m 2 ～3L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the concentration of the second fixing solution is 0.01M-0.04M, and the adding amount is 0.2L/M 2 ～0.6L/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the third cementing liquid contains 0.2-1.2M of urea and 0.2-0.8M of calcium chloride, and the molar ratio of the calcium chloride to the urea in the third cementing liquid is 1:1 to 1.5, the addition amount of the third cementing liquid is 20L/m 2 ～30L/m 2 ；
Standing for 2-8 h after drip irrigation of the second bacterial liquid; and standing for 1-3 h after drip irrigation of the second fixing liquid.
8. The method for restoring the ecological environment of a photovoltaic power plant suitable for sandstorm areas as claimed in claim 1, wherein step (1) further comprises a step of laying an irrigation system comprising:
the main pipeline is arranged below the sand ridge area and is connected with the photovoltaic panel cleaning water tank; and, a step of, in the first embodiment,
the branch pipeline is arranged below the planting areas on two sides of the main pipeline and is communicated with the main pipeline, and a liquid outlet is formed in the branch pipeline.
9. The ecological environment restoration method for the photovoltaic power station in the sand blown area according to claim 1, wherein the height of each sand ridge in the step (1) is 10 cm-30 cm, and the distance between two adjacent sand ridges is 0.5 m-1.5 m; and/or the number of the groups of groups,
the area of each planting area is 0.25m 2 ～2.25m 2 。
10. The method for restoring ecological environment in a photovoltaic power plant in a windy and sandy area according to claim 1, wherein in the step (4), the shade area of the photovoltaic panel is planted with the wedding plant, and the non-photovoltaic panel shade area is planted with the wedding plant.
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