Method for fixing sand through photovoltaic lower sand barrier

Abstract

The invention discloses a method for fixing sand through a photovoltaic lower sand barrier, and belongs to the technical field of desert control, and the method comprises the following steps: (1) setting a sand barrier: setting the sand barrier below a photovoltaic panel, adopting crop straws as a straw grid material, and pricking the straw grid material into sand to obtain the sand barrier with the side length of 2 * 2m and the height of 25-30cm; and (2) sand fixation management: after the arrangement of the sand barrier is completed, a skinning agent is sprayed on the surface of the sandy soil once, and the problem that the time required for skinning formation is long under the condition that the photovoltaic sand barrier is combined for sand control is solved.

Description

Technical Field

[0001] The invention relates to the technical field of desert control, and in particular to a method for fixing sand with photovoltaic sand barriers. Background Art

[0002] With the development of modern technology, desertification has become more and more serious, becoming one of the major environmental issues threatening human survival and regional ecological security. Therefore, how to solve the problem of desertification has become an urgent problem to be solved. The combined action of photovoltaic sand control and mechanical sand barriers is to build photovoltaic power stations in the sandy areas, use the shielding of photovoltaic power stations to reduce surface wind speed, reduce soil moisture evaporation, and cooperate with mechanical sand barriers to intercept condensation water and increase soil moisture content, which can quickly fix quicksand and is conducive to vegetation restoration, soil improvement and local microclimate improvement in the station. However, for areas with severe wind and sand, photovoltaic combined with sand barriers for sand control is still difficult to resist the loss of sand.

[0003] Soil crust is known as the "desert ecosystem engineer". It uses the secretions of algae to bond loose sand particles and cover the surface of the sand to achieve the effect of sand fixation. Once formed, it can fix the sand surface well and promote biodiversity. However, under natural conditions, it takes more than ten years for desert biological soil crust to form, and it is difficult to act in time to control sand. The artificial cyanobacteria crust sand control technology introduced today can greatly shorten the formation time of soil crust, but it also takes two to three years. Therefore, how to quickly form a crust in the desert is currently an urgent problem to be solved.

[0004] Therefore, the present invention provides a method for sand fixation under photovoltaic sand barriers, which promotes the formation of crust while combining photovoltaic sand barriers to control sand, thereby reducing the loss of sand and improving the effect of sand fixation. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method for sand fixation under photovoltaic sand barriers to solve the problem that it takes a long time for crust formation when photovoltaic sand barriers are used to control sand.

[0006] The present invention solves the above technical problems by the following technical means:

[0007] A method for sand fixation under photovoltaic sand barriers, the method comprising the following steps:

[0008] (1) Sand barrier setting: A sand barrier is set up under the photovoltaic panels. The straw of crops is used as the grass grid material. The material is cut into 40-50 cm lengths and driven into the sand with a flat-headed square shovel to obtain a sand barrier with a side length of 2×2m and a height of 25-30cm.

[0009] (2) Sand fixation management: After the sand barriers are arranged, a crusting agent is sprayed on the sand surface.

[0010] Setting up sand barriers can effectively slow down wind speed, reduce water evaporation in the sand, thereby reducing sand loss and playing a role in sand fixation. Spraying the crusting agent on the sand surface in the sand barrier, the gel-like crusting agent evenly covers the sand surface, which can further reduce the fluidity of sand particles and improve the sand fixation effect. At the same time, the crusting agent forms a crust on the sand surface, which can effectively fix the sand particles and reduce wind erosion.

[0011] Further, the amount of the skinning agent used is 100-120g / m 2 .

[0012] Further, the preparation method of the skinning agent is as follows:

[0013] S1: Collect moss crusts from desert areas, dry them at 30-35°C for 48-50h, and then crush them to make moss crust seed sources;

[0014] S2: Add N-isopropylacrylamide and hydroxyethyl methacrylate to water, stir and react at 50-60°C for 1-2h, then add N,N-methyleneacrylamide and ammonium persulfate and stir magnetically at room temperature for 20-22h, add sodium alginate solution after the reaction is completed, and uniformly obtain a mixed solution, then drop the mixed solution into a 3wt% calcium chloride solution to obtain microspheres;

[0015] S3: Add sodium dihydrogen phosphate and glucose into water and stir evenly, then add crusting seed source, xanthan gum, and microspheres, mix evenly to obtain a mixed gel, and then add cyanobacteria culture solution to obtain a crusting agent.

[0016] The crusting agent is sprayed on the surface of the sand, and the gel-state crusting agent can cover the surface of the sand to reduce the loss of the sand. At the same time, moss crusting provenance and cyanobacteria culture solution are added to the crusting agent. With the growth of moss and algae, a layer of crust can be formed to cover the surface of the desert, which can fix sand particles and reduce the mobility of the desert, thereby playing a role in preventing wind and fixing sand. However, due to the lack of nutrients and moisture in the desert soil, and the long-term influence of strong winds, algae are blown away or difficult to reproduce, resulting in a long time required to form a crust in the desert. Therefore, the crusting agent added by the present invention can supplement moss and algae. The crusting agent is in a gel state, which can provide a moist environment for the moss crusting provenance and cyanobacteria culture solution in the initial growth environment, and provide more sufficient moisture to promote the growth of moss and algae, thereby promoting the growth of moss and algae, and then forming a crust on the surface of the sand.

[0017] However, the oxygen permeability of the crusting agent in a gel state is low, resulting in a certain inhibition of the growth of mosses and algae in the crusting agent. Therefore, the present invention adds N-isopropylacrylamide to the crusting agent. When the temperature gradually rises during the day, the crusting agent exhibits hydrophobicity and gradually releases water, causing the gel to collapse, resulting in the shrinkage of the crusting agent gel and the appearance of pores, thereby increasing the porosity of the crusting agent and promoting the permeation of oxygen, so that the oxygen stored in the gel can promote the growth and reproduction of mosses and algae. When the temperature drops at night, the crusting agent exhibits hydrophilicity and gradually absorbs water. Water vapor in the air condenses into water droplets and is absorbed. At the same time, after the water vapor condenses into water droplets on the photovoltaic panel, it will also fall into the crusting agent and be adsorbed, causing the crusting agent to swell and increase the water content, and reducing the porosity of the crusting agent, reducing the oxygen permeability, and reducing the respiration of mosses and algae, so as to reduce the nutrient consumption of mosses and algae, thereby promoting the nutrient accumulation of mosses and algae and promoting their growth. If only N-isopropylacrylamide is used as a single component of the skinning agent, the temperature-sensitive effect will not be obvious, so hydroxyethyl methacrylate is also added to modify it. Hydroxyethyl methacrylate can react with N-isopropylacrylamide to increase the hydrophobic effect of N-isopropylacrylamide, thereby improving the temperature-sensitive effect of the skinning agent and reducing the temperature at which the skinning agent undergoes temperature-sensitive changes, so that it can begin to shrink when the temperature is in the desert during the day and swell when the temperature drops at night. In addition, N-isopropylacrylamide is reacted and mixed with sodium alginate to prepare microspheres, and then the microspheres are dispersed in the skinning agent. The oxygen permeability of the skinning agent can be increased by changing the pores of the microspheres in the skinning agent, thereby preventing the skinning agent from losing water as a whole during the day and affecting the growth of mosses and algae.

[0018] At the same time, a certain amount of sodium dihydrogen phosphate and glucose are added to the crusting agent to provide nutrients for the growth of mosses and algae, promote the initial survival of mosses and algae, promote the formation of crusts on the surface of sand, and reduce the time required for crusting. Therefore, the crusting agent can provide a good environment for the initial growth of mosses and algae, thereby increasing the initial growth rate of mosses and algae; as mosses and algae grow and as the crusting agent gradually decomposes, mosses and algae have become dominant populations and can continue to grow to form crusts, thereby playing a role in sand fixation.

[0019] Furthermore, in step S2, the mass ratio of N-isopropylacrylamide, N,N-methyleneacrylamide, ammonium persulfate, hydroxyethyl methacrylate and sodium alginate is (2-2.4): (0.2-0.24): (0.2-0.22): (0.8-1): (1-1.2).

[0020] Furthermore, in step S3, the mass ratio of sodium dihydrogen phosphate, glucose, crust seed source, xanthan gum, and microspheres is (2-3): (1.5-2): (5-6): (2-3): (5-8).

[0021] Furthermore, in step S3, the mass ratio of the cyanobacteria culture solution to the mixed gel is (2-2.2): (10-12).

[0022] Furthermore, the preparation method of the cyanobacteria culture solution is: inoculating cyanobacteria into BG-11 liquid culture medium, placing it under the conditions of light intensity of 2500-3000lx and temperature of 25-30°C for 7-10 days to obtain the cyanobacteria culture solution.

[0023] Furthermore, the dry weight of algae in the cyanobacteria culture solution is 0.006-0.0065 g / mL.

[0024] Beneficial effects:

[0025] The present invention sets up a sand barrier under photovoltaic power and uses a crusting agent, which can evenly cover the sand surface after spraying, reduce the fluidity of sand particles, thereby reducing sand loss, and can form a crust on the sand surface, further promoting the fixation of quicksand. Therefore, the present invention can effectively prevent wind erosion and sand accumulation hazards, promote sandy soil improvement and vegetation restoration. The invention is simple to operate, easy to implement, and will not affect the environment. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to specific embodiments:

[0027] Embodiment 1:

[0028] Preparation of crusting agent:

[0029] S1: Collect moss crusts from desert areas, dry them at 30°C for 48 hours, and then crush the moss into about 1 mm in length to obtain moss crust provenance;

[0030] S2: 4 g of N-isopropylacrylamide and 1 g of hydroxyethyl methacrylate were added to 100 mL of water, and the mixture was stirred at 50° C. for 1 h. Then, 0.2 g of N,N-methyleneacrylamide and 0.2 g of ammonium persulfate were added and magnetically stirred at room temperature for 20 h. After the reaction was completed, 2 g of sodium alginate solution prepared by mixing with 100 mL of water was added, and the mixture was stirred to obtain a mixed solution. Then, the mixed solution was dropped into a 3 wt % calcium chloride solution to obtain microspheres.

[0031] S3: The cyanobacteria were inoculated into BG-11 liquid culture medium, and cultured under the conditions of a light intensity of 2500 lx and a temperature of 25°C for 7 days to obtain a cyanobacteria culture solution with an algae dry weight of 0.006 g / mL.

[0032] S4: Add 2g of sodium dihydrogen phosphate and 1.5g of glucose into 100mL of water and stir evenly, then add 5g of crusting seed source, 2g of xanthan gum, and 5g of microspheres, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2:10, mix evenly to obtain a crusting agent.

[0033] Methods of sand fixation under photovoltaic sand barriers:

[0034] (1) Sand barrier setting: A sand barrier is set up under the photovoltaic panels. The crop straw is used as the grass grid material. The material is cut into 40 cm lengths. A flat-headed square shovel is used to pierce the straw into the sand for 15 cm to obtain a sand barrier with a height of 25 cm and a side length of 2 × 2 m.

[0035] (2) Sand fixation management: After the sand barrier is arranged, a crusting agent is sprayed on the sand surface at a rate of 100 g / m 2 .

[0036] Embodiment 2:

[0037] Preparation of crusting agent:

[0038] S1: Collect moss crusts from desert areas, dry them at 32°C for 49 hours, and then crush them to a length of about 1 mm to obtain moss crust provenance;

[0039] S2: 4.2 g of N-isopropylacrylamide and 1 g of hydroxyethyl methacrylate were added to 105 mL of water, and the mixture was stirred at 55°C for 1.5 h. Then, 0.22 g of N,N-methyleneacrylamide and 0.21 g of ammonium persulfate were added and magnetically stirred at room temperature for 21 h. After the reaction was completed, 2.1 g of sodium alginate solution prepared by mixing with 105 mL of water was added, and the mixture was stirred to obtain a mixed solution. Then, the mixed solution was dropped into a 3 wt % calcium chloride solution to obtain microspheres.

[0040] S3: The cyanobacteria were inoculated into a BG-11 liquid culture medium and cultured for 8 days under the conditions of a light intensity of 2800 lx and a temperature of 28°C to obtain a cyanobacteria culture solution with an algae dry weight of 0.0062 g / mL;

[0041] S4: Add 2.5g of sodium dihydrogen phosphate and 1.8g of glucose into 125mL of water and stir evenly, then add 5.5g of crusting seed source, 2.5g of xanthan gum, and 6.5g of microspheres, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2.1:11, mix evenly to obtain a crusting agent.

[0042] Methods of sand fixation under photovoltaic sand barriers:

[0043] (1) Sand barrier setting: A sand barrier is set up under the photovoltaic panels. The crop straw is used as the grass grid material. The material is cut into 42 cm lengths. The straw is driven into the sand 17 cm with a flat-headed square shovel to obtain a sand barrier with a height of 25 cm and a side length of 2 × 2 m.

[0044] (2) Sand fixation management: After the sand barrier is arranged, a crusting agent is sprayed on the sand surface at a rate of 110 g / m 2 .

[0045] Embodiment 3:

[0046] Preparation of crusting agent:

[0047] S1: Collect moss crusts from desert areas, dry them at 35°C for 50 hours, and then crush them to a length of about 2 mm to obtain moss crust provenance;

[0048] S2: 4.4 g of N-isopropylacrylamide and 1 g of hydroxyethyl methacrylate were added to 110 mL of water, and the mixture was stirred at 50° C. for 2 h. Then, 0.24 g of N,N-methyleneacrylamide and 0.22 g of ammonium persulfate were added and magnetically stirred at room temperature for 22 h. After the reaction was completed, 2.2 g of sodium alginate solution prepared by mixing with 100 mL of water was added, and the mixture was stirred to obtain a mixed solution. Then, the mixed solution was dropped into a 3 wt % calcium chloride solution to obtain microspheres.

[0049] S3: Inoculate the cyanobacteria into BG-11 liquid culture medium, and culture them under the conditions of light intensity of 3000 lx and temperature of 30°C for 10 days to obtain a cyanobacteria culture solution with an algae dry weight of 0.0065 g / mL;

[0050] S4: Add 3g of sodium dihydrogen phosphate and 2g of glucose into 15mL of water and stir evenly, then add 6g of crusting seed source, 3g of xanthan gum, and 8g of microspheres, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2.2:12, mix evenly to obtain a crusting agent.

[0051] Methods of sand fixation under photovoltaic sand barriers:

[0052] (1) Sand barrier setting: A sand barrier is set up under the photovoltaic panels. The crop straw is used as the grass grid material. The material is cut into 45 cm lengths. The straw is driven into the sand 20 cm with a flat-headed square shovel to obtain a sand barrier with a height of 25 cm and a side length of 2 × 2 m.

[0053] (2) Sand fixation management: After the sand barrier is arranged, a crusting agent is sprayed on the sand surface at a rate of 120 g / m 2 .

[0054] Comparative Example 1:

[0055] This comparative example is in contrast to Example 1, and the only difference is the raw material of the crusting agent. Specifically, the moss crusting source is directly mixed with water. The specific method is as follows:

[0056] S1: Collect moss crusts from desert areas, dry them at 30°C for 48 hours, and then crush them to a length of about 1 mm to obtain moss crust provenance;

[0057] S2: Mix 5 g of moss crust source with 100 mL of water to obtain a crusting agent.

[0058] The method of photovoltaic sand barrier fixation in this comparative example is the same as that in Example 1.

[0059] Comparative Example 2:

[0060] This comparative example is in contrast to Example 1, the only difference being that the preparation method of the skinning agent is different, specifically, the microspheres prepared from N-isopropylacrylamide are not added. The specific preparation method is as follows:

[0061] S1: Collect moss crusts from desert areas, dry them at 30°C for 48 hours, and then crush them to obtain moss crust provenance;

[0062] S2: The cyanobacteria were inoculated into a BG-11 liquid culture medium and cultured for 7 days under the conditions of a light intensity of 2500 lx and a temperature of 25°C to obtain a cyanobacteria culture solution with an algae dry weight of 0.006 g / mL;

[0063] S3: Add 2g of sodium dihydrogen phosphate and 1.5g of glucose into 100mL of water and stir evenly, then add 5g of crusting seed source and 2g of xanthan gum, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2:10, mix evenly to obtain a crusting agent.

[0064] The method of photovoltaic sand barrier fixation in this comparative example is the same as that in Example 1.

[0065] Comparative Example 3:

[0066] This comparative example is in contrast to Example 1, the only difference being the raw material of the skinning agent, specifically, no hydroxyethyl methacrylate is added, and the specific method is as follows:

[0067] S1: Collect moss crusts from desert areas, dry them at 30°C for 48 hours, and then crush them to obtain moss crust provenance;

[0068] S2: 4.4 g of N-isopropylacrylamide, 0.24 g of N,N-methyleneacrylamide, and 0.22 g of ammonium persulfate were magnetically stirred at room temperature for 22 h. After the reaction was completed, 2.2 g of sodium alginate solution prepared by mixing with 100 mL of water was added, and the mixture was stirred to obtain a mixed solution. The mixed solution was then dropped into a 3 wt % calcium chloride solution to obtain microspheres.

[0069] S3: Inoculate the cyanobacteria into BG-11 liquid culture medium, and culture them under the conditions of light intensity of 2500 lx and temperature of 25°C for 7 days to obtain a cyanobacteria culture solution with an algae dry weight of 0.006 g / mL;

[0070] S4: Add 2g of sodium dihydrogen phosphate and 1.5g of glucose into 100mL of water and stir evenly, then add 5g of crusting seed source, 2g of xanthan gum, and 5g of microspheres, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2:10, mix evenly to obtain a crusting agent.

[0071] The method of photovoltaic sand barrier fixation in this comparative example is the same as that in Example 1.

[0072] Comparative Example 4:

[0073] This comparative example is compared with Example 1, and the only difference is that the raw materials of the non-skinning agent are different. Specifically, in the preparation process of the skinning agent, the quality of other raw materials remains unchanged, and the amount of microspheres added is increased, and the amount added is 10g of microspheres. The specific method is as follows:

[0074] S1: Collect moss crusts from desert areas, dry them at 30°C for 48 hours, and then crush them to obtain moss crust provenance;

[0075] S2: 4.4 g of N-isopropylacrylamide and 1 g of hydroxyethyl methacrylate were added to 110 mL of water, stirred at 50° C. for 1 h, then 0.24 g of N,N-methyleneacrylamide and 0.22 g of ammonium persulfate were added and magnetically stirred at room temperature for 22 h. After the reaction was completed, 2.2 g of sodium alginate solution prepared by mixing with 100 mL of water was added, stirred evenly to obtain a mixed solution, and then the mixed solution was dropped into a 3 wt % calcium chloride solution to obtain microspheres;

[0076] S3: Inoculate the cyanobacteria into BG-11 liquid culture medium, and culture them under the conditions of light intensity of 2500 lx and temperature of 25°C for 7 days to obtain a cyanobacteria culture solution with an algae dry weight of 0.006 g / mL;

[0077] S4: Add 2g of sodium dihydrogen phosphate and 1.5g of glucose into 100mL of water and stir evenly, then add 5g of crusting seed source, 2g of xanthan gum, and 10g of microspheres, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2:10, mix evenly to obtain a crusting agent.

[0078] The method of photovoltaic sand barrier fixation in this comparative example is the same as that in Example 1.

[0079] Comparative Example 5:

[0080] This comparative example is compared with Example 1, and the only difference is that the raw materials of the non-skinning agent are different. Specifically, in the preparation process of the skinning agent, the quality of other raw materials remains unchanged, and the amount of microspheres added is increased, and the amount added is 2g of microspheres. The specific method is as follows:

[0081] S1: Collect moss crusts from desert areas, dry them at 30°C for 48 hours, and then crush them to obtain moss crust provenance;

[0082] S2: 4.4 g of N-isopropylacrylamide and 1 g of hydroxyethyl methacrylate were added to 110 mL of water, stirred at 50° C. for 1 h, then 0.24 g of N,N-methyleneacrylamide and 0.22 g of ammonium persulfate were added and magnetically stirred at room temperature for 22 h. After the reaction was completed, 2.2 g of sodium alginate solution prepared by mixing with 100 mL of water was added, stirred evenly to obtain a mixed solution, and then the mixed solution was dropped into a 3 wt % calcium chloride solution to obtain microspheres;

[0083] S3: Inoculate the cyanobacteria into BG-11 liquid culture medium, and culture them under the conditions of light intensity of 2500 lx and temperature of 25°C for 7 days to obtain a cyanobacteria culture solution with an algae dry weight of 0.006 g / mL;

[0084] S4: Add 2g of sodium dihydrogen phosphate and 1.5g of glucose into 100mL of water and stir evenly, then add 5g of crusting seed source, 2g of xanthan gum, and 2g of microspheres, mix evenly to obtain a mixed gel, then add the cyanobacteria culture solution to the mixed gel in a mass ratio of 2:10, mix evenly to obtain a crusting agent.

[0085] The method of photovoltaic sand barrier fixation in this comparative example is the same as that in Example 1.

[0086] experiment:

[0087] (1) Sand barrier installation: In a photovoltaic base in a sandy area of ​​Yulin City, sand barriers were installed under photovoltaic panels in April. The straw of crops was used as the grass grid material. The material was cut into 40 cm lengths. The straw was driven into the sand 15 cm with a flat-headed square shovel to obtain a sand barrier with a height of 25 cm and a side length of 2 × 2 m.

[0088] (2) Sand fixation management: After the sand barrier is set up, a crusting agent is sprayed on the sand surface at a rate of 100 g / m 2 .

[0089] According to the above method, the following experiments were performed:

[0090] 1. Comparative group 1 used the skinning agent prepared in Example 1;

[0091] 2. Comparative groups 1-5 used the skinning agents prepared in comparative groups 1-5;

[0092] 3. The blank group was not sprayed with a crusting agent.

[0093] Each experimental group conducted thirty sand barrier experiments, with one sand barrier as a group. After one year, the degree of crusting in the sand barriers was checked and the coverage was calculated. The results are shown in Table 1. Each experimental group randomly selected 10 groups of sand barriers to measure the thickness of the crust formed in the sand barriers. The measurement method was: measuring the thickness at the four corners and the center of the sand barrier, and taking the average value as the thickness of the crust. The results are shown in Table 1.

[0094] Table 1

[0095]

[0096]

[0097] Analyzing Table 1, we can get:

[0098] 1. Compared with experimental group 1, control group 1 mixed the moss crust seed with water. After the moss crust was inoculated onto the surface of the sand, the moss crust was easily blown away in the windy weather in the desert, resulting in a decrease in the amount of moss crust and a reduction in the content of moss crust in the sand barrier, which in turn led to a lower crust coverage and thickness in control group 1.

[0099] 2. Compared with experimental group 1, control group 2 did not add microspheres, and the oxygen permeability of the gel crusting agent was lower, which inhibited the growth of mosses, resulting in a slower rate of seed coat formation, and a lower coverage and thickness of the crust after one year. Compared with experimental group 1, control group 3 did not add hydroxyethyl methacrylate, and the temperature at which the crusting agent undergoes temperature-sensitive changes is higher, resulting in a longer time for the pores of the crusting agent to change, and a decrease in oxygen permeability, which led to a certain inhibition of the growth of mosses and algae, and a lower coverage and thickness of the crust.

[0100] 3. Compared with experimental group 1, the amount of microspheres added in comparison group 4 is higher. When the temperature rises, the crusting agent loses too much water, which affects the growth of algae. Therefore, the crusting coverage is poor and the thickness is low after one year. Compared with experimental group 1, the amount of microspheres added in comparison group 5 is less, and the effect of changing the oxygen permeability of the crusting agent is poor, resulting in a slower growth rate of moss and algae and a longer time required for crusting. Therefore, the crusting coverage and thickness of comparison group 4 are lower.

[0101] 4. Compared with experimental group 1, the blank group did not spray the crusting agent, and the crust coverage was only 6.2% and the thickness was only 0.4 mm. This is because it takes a long time for the crust to form naturally in the desert. Therefore, it shows that the method of experimental group 1 can effectively promote the formation of the crust and reduce the time required for the crust to form.

[0102] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention. The techniques, shapes, and structural parts not described in detail in the present invention are all known technologies.

Claims

1. A method for sand fixation under photovoltaic sand barriers, characterized in that: The method comprises the following steps: (1) Sand barrier setting: A sand barrier is set up under the photovoltaic panel. Straw is used as the grass grid material and is inserted into the sand to obtain a sand barrier with a side length of 2×2m and a height of 25-30cm. (2) Sand fixation management: After the sand barriers are arranged, a crusting agent is sprayed on the sand surface.

2. The method for sand fixation by photovoltaic sand barriers according to claim 1, characterized in that: The amount of the skinning agent used is 100-120 g / m 2 .

3. The method for sand fixation by photovoltaic sand barriers according to claim 2, characterized in that: The preparation method of the skinning agent is as follows: S1: Collect moss crusts from desert areas, dry them at 30-35°C for 48-50h, and then crush them to make moss crust seed sources; S2: Add N-isopropylacrylamide and hydroxyethyl methacrylate to water, stir and react at 50-60°C for 1-2h, then add N,N-methyleneacrylamide and ammonium persulfate and stir magnetically at room temperature for 20-22h, add sodium alginate solution after the reaction is completed, stir evenly to obtain a mixed solution, and then drop the mixed solution into a 3wt% calcium chloride solution to obtain microspheres; S3: Add sodium dihydrogen phosphate and glucose into water and stir evenly, then add crusting seed source, xanthan gum, and microspheres, mix evenly to obtain a mixed gel, then add cyanobacteria culture solution, mix to obtain a crusting agent.

4. The method for sand fixation by photovoltaic sand barriers according to claim 3, characterized in that: In the step S2, the mass ratio of N-isopropylacrylamide, N,N-methyleneacrylamide, ammonium persulfate, hydroxyethyl methacrylate and sodium alginate is (2-2.4): (0.2-0.24): (0.2-0.22): (0.8-1): (1-1.2).

5. The method for sand fixation by photovoltaic sand barriers according to claim 4, characterized in that: In the step S3, the mass ratio of sodium dihydrogen phosphate, glucose, crust seed source, xanthan gum, and microspheres is (2-3): (1.5-2): (5-6): (2-3): (5-8).

6. The method for sand fixation by photovoltaic sand barriers according to claim 5, characterized in that: In step S3, the mass ratio of the cyanobacteria culture solution to the mixed gel is (2-2.2): (10-12).

7. The method for sand fixation by photovoltaic sand barriers according to claim 6, characterized in that: The preparation method of the cyanobacteria culture solution is as follows: inoculating cyanobacteria into a BG-11 liquid culture medium, culturing for 7-10 days under the conditions of a light intensity of 2500-3000 lx and a temperature of 25-30° C., and obtaining the cyanobacteria culture solution.

8. The method for sand fixation by photovoltaic sand barriers according to claim 7, characterized in that: The dry weight of algae in the cyanobacteria culture solution is 0.006-0.0065 g / mL.

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