Desertified soil restoration method combining shifting sand fixation and vegetation restoration

Abstract

The present invention relates to the technical field of desert sand-fixation and control, and provides a desertified soil restoration method combining shifting sand fixation and vegetation restoration. The desertified soil restoration method combining shifting sand fixation and vegetation restoration comprises the following steps: S1, vegetation selection, S2, sand-fixation tree grate manufacturing, S3, planting preparation, S4, planting, S5, growth condition monitoring, and S6, data sorting and analysis. Degradable tree grates are used for stabilizing the surface of shifting sand and preventing the surface of the shifting sand from moving; sand-fixation vegetation is then planted in the centers of the tree grates to stabilize shifting sand at deeper layers; a layered nutrient solution inside the degradable tree grates can slowly supply nutrients without affecting the use of pesticides; compost and cellulose produced after decomposition increase the activity of soil, improve the microbial diversity of the soil, and promote the activity of microorganisms in the soil, thereby enhancing the biological activity of the soil; and the cellulose decomposes in the soil, increasing the organic matter content of the soil, and improving the structure of the soil.

Description

Desertification soil remediation method combining sand fixation with vegetation restoration TECHNICAL FIELD

[0001] The present application relates to the technical field of desert sand control, in particular to a desertification soil remediation method combining sand fixation with vegetation restoration. BACKGROUND

[0002] Desert soil sand flow refers to the phenomenon that fine sand particles on the surface of soil are blown up and moved due to wind action in arid and semi-arid areas, which is particularly common in areas with serious desertification, and has a serious impact on the local ecological environment and human activities. The sand flow not only covers and destroys vegetation, leading to land degradation, but also threatens the safety of human settlements and infrastructure. In order to control desert soil sand flow, drought-tolerant and wind-sand-tolerant plants such as sand willow, sand thorn, and camel thorn are planted to fix sand land and reduce wind erosion. The root system of vegetation can enhance the stability of soil and reduce the movement of sand particles. Physical methods such as sand barriers, grass squares, and grids are used to block wind and reduce the movement of sand particles, which can effectively fix sand land and create conditions for the growth of vegetation. Rational use of water resources can be achieved through irrigation, drip irrigation, and other water-saving measures to increase soil moisture and improve soil wind erosion resistance. Desert soil can also be remedied by combining sand fixation structure with vegetation restoration. TECHNICAL PROBLEM

[0003] In the prior art, a desertification soil remediation method combining sand fixation with vegetation restoration is used to fix sand with some sand-fixing equipment and then plant sand-fixing vegetation for soil remediation. The sand-fixing structure is generally a mixture of plastic or cement mortar, which can fix sand. However, the sand-fixing structure is not recycled after soil remediation, which affects the activity of the soil. In addition, the sand-fixing vegetation needs to be maintained and irrigated for a long time before and after sand fixation, which consumes a lot of time and resources. Therefore, the present application provides a desertification soil remediation method combining sand fixation with vegetation restoration to solve the problems mentioned in the background. TECHNICAL SOLUTION

[0004] (I) Technical problem solved

[0005] In view of the shortcomings of the prior art, the present application provides a desertification soil remediation method combining sand fixation with vegetation restoration, which solves the problem that the sand-fixing structure is generally a mixture of plastic or cement mortar, which can fix sand, but the sand-fixing structure is not recycled after soil remediation, which affects the activity of the soil. In addition, the sand-fixing vegetation needs to be maintained and irrigated for a long time before and after sand fixation, which consumes a lot of time and resources.

[0006] (II) Technical solution

[0007] To achieve the above object, the present application is realized by the following technical solutions: a desertification soil remediation method combining sand fixation and vegetation restoration, comprising the following steps:

[0008] S1. Selecting vegetation, selecting cactus seedlings, sandthorn seedlings, sand willow seedlings and camelthorn seedlings for planting, and symbiotic algae are desert algae mixedly cultured by sheathed microcoleus, gellinga delicatula, pseudochaetophora javanica, nostoc and chlorella ovalis, the desert algae and sand-fixing vegetation are planted together to accelerate the soil formation process, promote the improvement of soil fertility, create conditions for the growth of other plants, and gradually restore the function of the ecological system;

[0009] S2. Making sand-fixing tree gratings, limiting the surface sand flow through the sand-fixing tree gratings to prevent the surface sand flow, and the manufacturing process of the sand-fixing tree gratings is as follows:

[0010] S2.1. Making a tree grating mold for casting the tree grating to fix sand;

[0011] S2.2. Making a tree grating paste, using polylactic acid, polyhydroxyalkanoate, polycaprolactone, starch-based plastic, cellulose-based material and inorganic filler as raw materials to be crushed and stirred into paste, when mixing, first heat the polylactic acid to 160 degrees, after reaching 160 degrees, continue heating for 180s and then stop heating, then add polyhydroxyalkanoate and polycaprolactone and stir for 180s, finally inject starch-based plastic, cellulose-based material and inorganic filler, and stir again for 300s;

[0012] S2.3. Injecting the mold, injecting the mixed raw material paste into the mold, and demolding after cooling;

[0013] S2.4. Prepare the nutrient solution, add 1.5g of potassium nitrate, 0.03g of sodium chloride, 0.1g of magnesium sulfate, 0.5g of ferrous sulfate, 1g of sodium bicarbonate, 0.01g of gibberellin, 1g of ethylenediaminetetraacetic acid, 0.1g of mannitol, 0.1g of proline, 0.01g of cell division factor, 0.01g of amino acid and polypeptide, 0.01g of zinc, 0.01g of elemental calcium and 0.01g of manganese per liter of water, potassium nitrate provides nitrogen and potassium, nitrogen is an essential nutrient element for plant growth, potassium plays an important role in plant growth and development, stress resistance and yield improvement, sodium chloride is a source of trace elements for plant growth, magnesium sulfate provides magnesium element, magnesium is an important component of chlorophyll and is essential for photosynthesis, ferrous sulfate provides iron element, iron is an essential element for plant chlorophyll synthesis, lack of iron will hinder plant chlorophyll synthesis and cause yellowing, sodium bicarbonate as a soil conditioner, adjust the soil pH value, promote the absorption of nutrients by plants, gibberellin promotes plant growth, especially cell elongation and division, cell division factor promotes cell division and delays plant aging, amino acid and polypeptide as organic nitrogen source for plant growth, involved in plant metabolic process, zinc, calcium and manganese are essential for plant growth and development, involved in the regulation of various enzyme activities, affecting plant physiological processes, ethylenediaminetetraacetic acid as a chelating agent can form stable complexes with metal ions, improve the absorption and utilization of trace elements by plants, mannitol and proline as osmotic regulators can help plants maintain water balance in cells under drought conditions, reduce the damage of water stress to plants, amino acid and polypeptide directly provide amino acid required for plant growth, promote plant growth and development;

[0014] S2.5. Add decomposing fungi, mix thoroughly, then divide into two parts, one part adds decomposing fungi, the decomposing fungi include Fusarium, Aspergillus, white rot fungus and Trichoderma mixed to make a fungus solution, add 10g of fungus solution per liter of nutrient solution, through the continuous decomposition of the fungus solution to the tree fern, also solves the problem of less decomposing fungi and slow decomposition in desert soil;

[0015] S2.6. Inject the nutrient solution, inject the nutrient solution with decomposing fungi into the lower part of the inside of the tree fern, and inject the nutrient solution without decomposing fungi into the upper part of the inside of the tree fern;

[0016] S2.7. Preparation of insecticide, add 3g of abamectin insecticide and 2g of anti-caking agent per liter of water;

[0017] S2.8. Mix uniformly by magnetic stirrer and ultrasonic equipment, the stirring rate of the magnetic stirrer is 500RPM, and the ultrasonic treatment time is 180s, so that the abamectin insecticide and the anti-caking agent are fully mixed;

[0018] S2.9. Injecting pesticides, injecting the mixed pesticides into the inner center of the tree grid, after the position storing the pesticides is decomposed, the pesticides flow out, killing the pests on the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings, preventing the pests from affecting the growth of the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings;

[0019] S3. Planting preparation, applying organic fertilizer, green manure and soil conditioner to improve soil structure and fertility at the planting position, using deep plowing and crop rotation agricultural measures to improve the water and fertilizer retention capacity of the soil, and then erecting irrigation equipment to preliminarily water the planting position, optimizing the initial growth environment for the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings, and making the soil suitable for the growth of the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings;

[0020] S4. Planting, the prepared tree grid is arranged in a rectangular shape at the planting position, the distance between every two adjacent tree grids is 1.2 meters, the tree grid is lightly knocked down using a rubber hammer, and then the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings are planted in the center of the tree grid, and the desert algae is scattered in the gap between the sand-fixing vegetation and the tree grid, which helps to lock water and prevent water loss, and provides better survival conditions for the sand-fixing vegetation;

[0021] S5. Monitoring the growth, clearly monitoring the target and index, soil fertility, vegetation coverage, biodiversity and water condition, monitoring at three time periods of 8 o'clock in the morning, 1 o'clock in the noon and 6 o'clock in the evening every day, collecting the data of soil, vegetation and water ecological factors, and updating the data in real time, which is helpful for real-time monitoring of the sand-fixing vegetation and timely solving of problems;

[0022] S6. Data arrangement and analysis, arranging and analyzing the collected data to evaluate the progress and effect of ecological restoration.

[0023] Preferably, the tree grid comprises a first base, an upper end surface of the first base is provided with a second base, an upper end of the second base is provided with a third base, the first base, the second base and the third base are all provided with a center seat inside, an upper end surface of the third base is provided with a top cover, a center of an upper side wall of the first base, a center of an upper side wall of the second base and a center of an upper side wall of the third base are all provided with a threaded hole, a plug is arranged in each of the three threaded holes, a lower end surface of the first base and a lower end surface of the center seat are both provided with a ground plug, the thickness between the two side walls and the two inner side walls of the first base is less than the thickness between the lower inner wall and the lower end surface of the second base, and the thickness between the lower inner wall and the lower end surface of the third base is greater than the thickness between the lower inner wall and the lower end surface of the second base.

[0024] Preferably, according to step S2.1, the molds for the first base, the second base, the third base, the tapering insertion, the screw plug and the top cover are prepared, and the molds for the first base, the second base and the third base are provided with protrusions on the inner walls, so that the upper surface of the tree grid produced has grooves, the capacity of the grooves on the upper surface of the second base is 17ml, and the capacities of the grooves on the upper surfaces of the first base and the third base are both 20ml.

[0025] Preferably, in step S2.6, the nutrient solution with decomposing fungi is injected into the interior of the first base through the threaded hole, the nutrient solution without decomposing fungi is injected into the interior of the third base through the threaded hole, and the two screw plugs are used for sealing.

[0026] Preferably, in step S2.9, the mixed insecticide is injected into the interior of the second base through the threaded hole on one side of the second base, and then the screw plug is used for sealing.

[0027] Preferably, in step S3, the application of the mixture of the organic fertilizer, the green fertilizer and the soil conditioner is 10-20 tons per hectare, the mixing ratio of the mixture of the organic fertilizer, the green fertilizer and the soil conditioner is 7:2:1, the depth of the deep ploughing is 20-30cm, the irrigation equipment irrigates 20-30mm of water, and the irrigation is performed once every 10-15 days after planting, so as to provide water and nutrients for the sand-fixing vegetation in the initial growth stage and the undecomposed stage of the tree grid.

[0028] Preferably, the sources of the Microsphaeridium sheath, Phormidium tenue, Scytonema javanicum, Nostoc and Chlorella ovalis are collected in the dry season and in a position with high salinization degree, so as to ensure that the collected algae have the drought and salinization resistance, and the mixed planting of the desert algae with the drought and salinization resistance can ensure the growth of the desert algae in the most severe environment.

[0029] Preferably, the Microsphaeridium sheath, Phormidium tenue, Scytonema javanicum, Nostoc and Chlorella ovalis are fully mixed in a ratio of 1:1:1:1:1, and are cultured through a culture medium, so as to increase the biodiversity of the ecological system, help to build a more stable and healthy ecological system, fully utilize the unique biological characteristics and ecological functions of each kind of algae, and improve the stress resistance and resilience of the ecological system. Beneficial effects

[0030] (Three) beneficial effects

[0031] The present application provides a desertification soil remediation method combining sand fixation and vegetation restoration, and has the following beneficial effects:

[0032] 1. In the present application, the flowing sand surface is fixed by making decomposable tree grids, preventing the flowing sand surface from flowing, and then planting fixed sand vegetation in the center of the tree grid to fix deeper flowing sand. The nutrient solution inside the decomposable tree grid can slowly decompose the two side walls of the first base, so that the nutrient solution inside the first base and the carbon dioxide, water, compost and cellulose generated after decomposition are absorbed by the planted vegetation, which can slowly provide nutrient solution, water, compost and cellulose for the fixed sand vegetation, providing nutrients and nutrients for the initial growth of the fixed sand vegetation. The decomposition fungus continues to decompose the lower end face of the second base, after the decomposition of the lower end face of the second base, the insecticide flows out, which is convenient for killing insects and preventing pests from affecting the growth of the fixed sand vegetation. The decomposition fungus continues to decompose the lower end face of the third base, and after the decomposition of the lower end face of the third base, the last nutrient solution flows out, providing nutrient solution, water, compost and cellulose for the fixed sand vegetation, reducing the time and cost of later maintenance and irrigation.

[0033] 2. In the present application, potassium nitrate provides nitrogen and potassium, nitrogen is an essential nutrient element for plant growth, potassium plays an important role in plant growth and development, stress resistance and yield improvement, sodium chloride is a source of trace elements for plant growth, magnesium sulfate provides magnesium element, magnesium is an important part of chlorophyll and is essential for photosynthesis, ferrous sulfate provides iron element, iron is an essential element for plant chlorophyll synthesis, lack of iron will hinder plant chlorophyll synthesis and cause yellowing, sodium bicarbonate as a soil conditioner adjusts soil pH value and promotes plant nutrient absorption, gibberellin promotes plant growth, especially cell elongation and division, cytokinin promotes cell division and delays plant aging, amino acids and polypeptides are organic nitrogen sources for plant growth and participate in plant metabolic processes, zinc, calcium and manganese are essential for plant growth and development, participate in the activity regulation of various enzymes and affect plant physiological processes, ethylenediaminetetraacetic acid as a chelating agent can form stable complexes with metal ions, improve plant absorption and utilization of trace elements, mannitol and proline as osmotic regulators can help plants maintain water balance in cells under drought conditions and reduce water stress damage to plants, amino acids and polypeptides directly provide amino acids required for plant growth and promote plant growth and development.

[0034] 3. In the present application, the surface is fixed by using tree grids in the early stage, the fixed sand vegetation has been rooted in the flowing sand after the decomposition of the tree grid, the compost and cellulose generated after the decomposition of the tree grid increase the activity of the soil, improve the soil microbial diversity, promote the activity of the microorganisms in the soil, thereby improving the biological activity of the soil, the cellulose can increase the organic matter content of the soil after decomposition in the soil, improve the soil structure, and the desert algae and the fixed sand vegetation are planted together to accelerate the soil formation process and promote the improvement of soil fertility, creating conditions for the growth of other plants and gradually restoring the function of the ecological system.

[0035] 4. After the quicksand is solidified, the tree grates are completely decomposed, eliminating the need for recycling them. This also prevents existing cement and plastic tree grates from being piled up on the land for a long time. Cement tree grates may contain heavy metals and other harmful chemicals, which can leach into the soil through rainwater, polluting the soil and groundwater. Plastic tree grates may release harmful gases at high temperatures. Attached Figure Description

[0036] Figure 1 is a perspective view of the tree comb of the present invention;

[0037] Figure 2 is a perspective sectional view of the tree grate of the present invention;

[0038] Figure 3 is an enlarged view of point A in Figure 2.

[0039] Among them, 1. First base; 2. Second base; 3. Third base; 4. Top cover; 5. Center seat; 6. Ground plug; 7. Threaded hole; 8. Plug. Embodiments of the present invention

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0041] As shown in Figures 1-3, embodiments of the present invention provide a method for remediating desertified soil that combines quicksand stabilization with vegetation restoration, comprising the following steps:

[0042] S1. Select vegetation: Select cactus seedlings, sea buckthorn seedlings, sand willow seedlings and camel thorn seedlings for planting. The symbiotic algae are desert algae cultured by mixing Micrococcus sheathingus, Slender Fiber Algae, Java Pseudobranchia, Nostoc commune and the single-celled green algae Ovogella pulidonis. The desert algae and sand-fixing vegetation are planted together to accelerate the soil formation process, promote the improvement of soil fertility, create conditions for the growth of other plants, and gradually restore the function of the ecosystem.

[0043] S2. Constructing sand-fixing tree grates: These grates restrict surface sand flow and prevent it from moving. The process for constructing these sand-fixing tree grates is as follows:

[0044] S2.1. Make tree grate molds for casting tree grates to stabilize sand;

[0045] S2.2. Prepare the tree grid slurry, use polylactic acid, polyhydroxyalkanoate, polycaprolactone, starch-based plastic, cellulose-based material and inorganic filler as raw materials for crushing and stirring into slurry, when mixing, first heat polylactic acid to 160 degrees, after reaching 160 degrees, continue heating for 180 seconds, then do not heat, then add polyhydroxyalkanoate and polycaprolactone and stir for 180 seconds, finally inject, starch-based plastic, cellulose-based material and inorganic filler, stir again for 300 seconds;

[0046] S2.3. Inject the mold, inject the mixed raw material slurry into the mold, and after cooling, demold;

[0047] S2.4. Prepare the nutrient solution, add 1.5g of potassium nitrate, 0.03g of sodium chloride, 0.1g of magnesium sulfate, 0.5g of ferrous sulfate, 1g of sodium bicarbonate, 0.01g of gibberellin, 1g of ethylenediaminetetraacetic acid, 0.1g of mannitol, 0.1g of proline, 0.01g of cell division factor, 0.01g of amino acid and polypeptide, 0.01g of zinc, 0.01g of elemental calcium and 0.01g of manganese per liter of water, potassium nitrate provides nitrogen and potassium, nitrogen is an essential nutrient element for plant growth, potassium plays an important role in plant growth and development, stress resistance and yield improvement, sodium chloride is a source of trace elements for plant growth, magnesium sulfate provides magnesium element, magnesium is an important part of chlorophyll, which is essential for photosynthesis, ferrous sulfate provides iron element, iron is an essential element for plant chlorophyll synthesis, lack of iron will hinder plant chlorophyll synthesis and cause yellowing, sodium bicarbonate as a soil conditioner, adjust soil pH value, promote plant nutrient absorption, gibberellin promotes plant growth, especially cell elongation and division, cell division factor promotes cell division and delays plant aging, amino acid and polypeptide as organic nitrogen source for plant growth, involved in plant metabolic process, zinc, calcium and manganese are essential for plant growth and development, involved in the activity regulation of various enzymes, affecting plant physiological process, ethylenediaminetetraacetic acid as chelating agent, can form stable complex with metal ions, improve plant absorption and utilization of trace elements, mannitol and proline as osmotic regulator, can help plant maintain water balance in cell under drought conditions, reduce water stress damage to plants, amino acid and polypeptide directly provide amino acid required for plant growth, promote plant growth and development;

[0048] S2.5. Add decomposing fungi, mix thoroughly and divide into two parts, one part adds decomposing fungi, decomposing fungi includes fusarium, aspergillus, white rot fungus and trichoderma mixed to make fungus liquid, add 10g fungus liquid per liter of nutrient solution, through the continuous decomposition of fungus liquid to tree grid, also solves the problem of less decomposing fungi and slow decomposition in desert soil;

[0049] S2.6. Inject the nutrient solution, inject the nutrient solution with decomposing fungi into the lower part of the tree grid, and inject the nutrient solution without adding decomposing fungi into the upper part of the tree grid;

[0050] S2.7. Pesticide preparation, add 3g of abamectin pesticide and 2g of anti-caking agent per liter of water, abamectin, dosage information for preparation, dosage 30-40ml / acre;

[0051] S2.8. Uniform mixing by magnetic stirrer and ultrasonic device, stirring rate of magnetic stirrer is 500RPM, and ultrasonic treatment time is 180s, so that abamectin pesticide and anti-caking agent are fully mixed;

[0052] S2.9. Inject the pesticide, inject the mixed pesticide into the center of the tree grid, after the pesticide is decomposed, the pesticide flows out, and the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings are killed, preventing pests from affecting the growth of cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings;

[0053] S3. Preparation for planting, apply organic fertilizer, green manure and soil conditioner to improve soil structure and fertility at the planting site, use deep plowing and crop rotation agricultural measures to improve the water and fertilizer retention capacity of the soil, and then install irrigation equipment to preliminarily water the planting site, optimize the initial growth environment for cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings, and make the soil suitable for the growth of cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings;

[0054] S4. Planting, the prepared tree grid is arranged in a rectangular shape at the planting site, the distance between every two adjacent tree grids is 1.2 meters, the tree grid is gently knocked down with a rubber hammer, and then the cactus seedlings, sand sage seedlings, sand willow seedlings and camel thorn seedlings are planted in the center of the tree grid, and the desert algae is spread between the sand-fixing vegetation and the gap between the tree grid, which helps to lock water and prevent water loss, providing better living conditions for sand-fixing vegetation;

[0055] S5. Monitor the growth, clearly define the monitoring target and index, soil fertility, vegetation coverage, biodiversity and water condition, monitor at 8am, 1pm and 6pm every day, collect data of soil, vegetation and water ecological factors, and update the data in real time, which helps to monitor the sand-fixing vegetation in real time and solve problems in time;

[0056] S6. Data processing and analysis, process and analyze the collected data to evaluate the progress and effect of ecological restoration.

[0057] The tree grid includes a first base 1, the upper end surface of the first base 1 is provided with a second base 2, the upper end of the second base 2 is provided with a third base 3, the interiors of the first base 1, the second base 2 and the third base 3 are each provided with a center seat 5, the upper end surface of the third base 3 is provided with a top cover 4, the center of one side wall of the first base 1, the center of one side wall of the second base 2 and the center of one side wall of the third base 3 are each provided with a threaded hole 7, the interiors of the three threaded holes 7 are each provided with a plug 8, the lower end surface of the first base 1 and the lower end surface of the center seat 5 are each provided with a ground plug 6, the thickness between the two side walls and the two inner side walls of the first base 1 is less than the thickness between the lower inner wall and the lower end surface of the second base 2, the thickness between the lower inner wall and the lower end surface of the third base 3 is greater than the thickness between the lower inner wall and the lower end surface of the second base 2, the thickness between the two side walls and the two inner side walls of the first base 1 being less than the thickness between the lower inner wall and the lower end surface of the second base 2 makes the two side walls of the first base 1 easier to be disassembled, the nutrient solution stored in the interior of the first base 1 flows out to provide nutrients for sand-fixing vegetation, the thickness between the lower inner wall and the lower end surface of the third base 3 being greater than the thickness between the lower inner wall and the lower end surface of the second base 2 makes the lower end surface of the second base 2 easier to be disassembled, the insecticide in the interior of the second base 2 is preferentially discharged to kill insects, the nutrient solution in the third base 3 is discharged separately to provide nutrients and kill insects, and the insecticide and the nutrient solution do not affect each other, nutrients are continuously provided while killing insects.

[0058] According to step S2.1, the molds of the first base 1, the second base 2, the third base 3, the tapered ground plug 6, the plug 8 and the top cover 4 are prepared, the upper inner walls of the molds of the first base 1, the second base 2 and the third base 3 are each provided with a protrusion, the upper surface of the tree grid produced has a groove, the capacity of the groove on the upper surface of the second base 2 is 17 milliliters, and the capacities of the grooves on the upper surfaces of the first base 1 and the third base 3 are each 20 milliliters.

[0059] In step S2.6, the nutrient solution with decomposing fungi is injected into the interior of the first base 1 through the threaded hole 7, the nutrient solution without decomposing fungi is injected into the interior of the third base 3 through the threaded hole 7, and the two plugs 8 are used for sealing.

[0060] Preferably, in step S2.9, the insecticide after mixing is injected into the interior of the second base 2 through the threaded hole 7 on one side of the second base 2, and the plug 8 is used for sealing.

[0061] In step S3, the application of the mixture of organic fertilizer, green fertilizer and soil conditioner is 10-20 tons per hectare, the mixing ratio of the mixture of organic fertilizer, green fertilizer and soil conditioner is 7:2:1, the depth of deep ploughing is 20-30 centimeters, the irrigation equipment irrigates 20-30 millimeters of water, and irrigation is performed every 10-15 days after planting.

[0062] The source of the sheathed microsphaerid, the delicate mat, the Java pseudobranch, the pearl and the single-cell green algae oval drum ball algae species is collected in the dry season, in a location with high salinization degree, to ensure that the collected algae species has the ability to resist drought and salinization, and the mixed planting of the desert algae with the ability to resist drought and salinization can ensure the growth of the desert algae in the most severe environment.

[0063] The sheathed microsphaerid, the delicate mat, the Java pseudobranch, the pearl and the single-cell green algae oval drum ball algae species are fully mixed, with a mixing ratio of 1:1:1:1:1, and are cultured through the culture medium. Mixing different types of algae can increase the biodiversity of the ecosystem, and help to build a more stable and healthy ecosystem. Each type of algae has its unique biological characteristics and ecological functions, and mixed planting can fully utilize these characteristics to improve the resistance and resilience of the ecosystem.

[0064] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A desertification soil remediation method combining sand fixation and vegetation restoration, characterized in that: Comprise the following steps: ​ S1. Select the vegetation, select the cactus seedlings, sea buckthorn seedlings, sand willow seedlings and camel thorn seedlings are planted, symbiotic algae is mixed culture of desert algae with sheath microthamnion, phormidium tenue, javan pseudobranchia, pearl algae and single-cell green algae oval drum ball algae; S2. Make sand-fixing tree grate, limit the surface sand flow through sand-fixing tree grate, prevent the surface sand flow, the sand-fixing tree grate manufacturing process is as follows: S2.

1. Make tree grate mold, for casting tree grate to fix sand; S2.

2. Make tree grate slurry, use polylactic acid, polyhydroxyaliphatic acid ester, polycaprolactone, starch-based plastic, cellulose-based material and inorganic filler as raw material to crush and stir into slurry, when mixing, first heat polylactic acid to 160 degrees, reach 160 degrees, continue heating for 180s, then no longer heat, then add polyhydroxyaliphatic acid ester and polycaprolactone, stir and mix for 180s, finally inject, starch-based plastic, cellulose-based material and inorganic filler, stir again for 300s; S2.

3. Inject the mold, inject the mixed raw material slurry into the mold, after cooling, demold; S2.

4. Make nutrient solution, add 1.5g of potassium nitrate, 0.03g of sodium chloride, 0.1g of magnesium sulfate, 0.5g of ferrous sulfate, 1g of sodium bicarbonate, 0.01g of gibberellin, 1g of ethylenediaminetetraacetic acid, 0.1g of mannitol, 0.1g of proline, 0.01g of cell division factor, 0.01g of amino acid and polypeptide, 0.01g of zinc, 0.01g of elemental calcium and 0.01g of manganese per liter of water; S2.

5. Add decomposing fungi, after mixing thoroughly, divide into two parts, one part adds decomposing fungi, the decomposing fungi includes fusarium fungi, aspergillus fungi, white rot fungi and trichoderma fungi mixed to make fungus solution, add 10g fungus solution per liter of nutrient solution; S2.

6. Inject nutrient solution, inject the nutrient solution with added decomposing fungi into the lower part of the inside of the tree grate, inject the nutrient solution without added decomposing fungi into the upper part of the inside of the tree grate; S2.

7. Insecticide preparation, add 3g of abamectin insecticide and 2g of anti-caking agent per liter of water; S2.

8. Mix uniformly by magnetic stirrer and ultrasonic equipment, the stirring rate of the magnetic stirrer is 500RPM, and the ultrasonic treatment time is 180s, so that the abamectin insecticide and the anti-caking agent are fully mixed; S2.

9. Inject insecticide, inject the mixed insecticide into the center position of the inside of the tree grate; S3. Planting preparation, apply organic fertilizer, green manure and soil conditioner to improve soil structure and fertility in the planting position, adopt deep ploughing and crop rotation agricultural measures to improve the water and fertilizer conservation capacity of the soil, and then erect irrigation equipment to preliminarily water the planting position; S4. Planting, the prepared tree grates are arranged in a rectangular shape in the planting position, the interval distance between every two adjacent tree grates is 1.2 meters, use a rubber hammer to gently knock down the tree grates, then plant the cactus seedlings, sea buckthorn seedlings, sand willow seedlings and camel thorn seedlings in the center position of the tree grates, and spread the desert algae in the gap between the sand-fixing vegetation outside and the tree grates; S5. Monitor the growth situation, clear monitoring target and index, soil fertility, vegetation coverage, biodiversity and water conditions, monitor at 8 am, 1 pm and 6 pm every day, collect soil, vegetation and water ecological factor data; S6. Data processing and analysis, process and analyze the collected data, evaluate the progress and effect of ecological restoration.

2. The desertification soil remediation method combining with sand fixation and vegetation restoration according to claim 1, characterized in that: The tree grate comprises a first base (1), the upper end face of the first base (1) is provided with a second base (2), the upper end of the second base (2) is provided with a third base (3), the interiors of the first base (1), the second base (2) and the third base (3) are all provided with a center seat (5), the upper end face of the third base (3) is provided with a top cover (4), the center of one side wall of the first base (1) near the upper end, the center of one side wall of the second base (2) near the upper end and the center of one side wall of the third base (3) near the upper end are all provided with a threaded hole (7), the interiors of the three threaded holes (7) are all provided with a plug (8), the lower end face of the first base (1) and the lower end face of the center seat (5) near the lower end are all provided with a ground plug (6), the thickness between the two side walls and the two inner side walls of the first base (1) is smaller than the thickness between the lower inner wall and the lower end face of the second base (2), and the thickness between the lower inner wall and the lower end face of the third base (3) is greater than the thickness between the lower inner wall and the lower end face of the second base (2).

3. The desertification soil remediation method of quicksand fixation combined with vegetation restoration according to any one of claims 1-2, characterized in that: According to step S2.1, the molds of the first base (1), the second base (2), the third base (3), the conical ground plug (6), the plug (8) and the top cover (4) are made, the upper inner walls of the molds of the first base (1), the second base (2) and the third base (3) are all provided with protrusions, so that the upper surfaces of the made tree grates have grooves, the capacity of the groove on the upper surface of the second base (2) is 17 ml, and the capacities of the grooves on the upper surfaces of the first base (1) and the third base (3) are both 20 ml.

4. The desertification soil remediation method of quicksand fixation combined with vegetation restoration according to any one of claims 1-3, characterized in that: In step S2.6, the nutrient solution with decomposing fungi is injected into the interior of the first base (1) through the threaded hole (7), the nutrient solution without decomposing fungi is injected into the interior of the third base (3) through the threaded hole (7), and the two plugs (8) are used for sealing.

5. The desertification soil remediation method of quicksand fixation combined with vegetation restoration according to any one of claims 1-3, characterized in that: In step S2.9, the mixed insecticide is injected into the interior of the second base (2) through the threaded hole (7) on one side of the second base (2), and then the plug (8) is used for sealing.

6. The desertification soil remediation method of quicksand fixation combined with vegetation restoration according to claim 1, characterized in that: In step S3, the application of the mixture of the organic fertilizer, the green fertilizer and the soil conditioner is 10-20 tons per hectare, the mixing ratio of the mixture of the organic fertilizer, the green fertilizer and the soil conditioner is 7:2:1, the deep ploughing depth is 20-30 cm, the irrigation equipment irrigates 20-30 mm of water, and irrigation is carried out once every 10-15 days after planting.

7. The desertification soil remediation method of quicksand fixation combined with vegetation restoration according to claim 1, characterized in that: The sources of the sheathed microcoleus, the gomphosphaeria aponina, the pseudochaetophora javanica, the nostoc commune and the chlorella ovalis algae are collected in the dry season and in the position with high salinization degree, so as to ensure that the collected algae have the drought and salinity resistance.

8. The desertification soil remediation method of quicksand fixation combined with vegetation restoration according to claim 1, characterized in that: The sheathed microcoleus, the fine phormidium, the java pseudochaeta, the pearl algae and the single-cell green algae ovate globose algae species are fully mixed in a mixing ratio of 1:1:1:1:1, and are cultured through a culture medium.

Images