Drought-enduring growth regulation complexing agent and application thereof in ecological restoration of arid regions

Abstract

The invention provides a drought-enduring growth regulation complexing agent and an ecological restoration method of the drought-enduring growth regulation complexing agent in arid regions. The drought-tolerant growth regulation complexing agent comprises a seed soaking agent and a spraying agent, wherein the seed soaking agent comprises trehalose, proline, fructan, chitosan, brassinolide, potassium fulvate, trisodium phosphate and the balance of water; the spraying agent is prepared from trehalose, proline, fructan, chitosan, brassinolide, potassium fulvate, a nutrient component, a stress-resistant auxiliary component, a spraying auxiliary component and water. The drought-resistant growth regulation complexing agent is used for vegetation concrete, so that ecological restoration of arid regions can be realized, and the drought resistance of vegetation in an arid environment can be improved; meanwhile, the vegetation concrete also has excellent mechanical strength, and the service life of the vegetation concrete can be prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of slope protection and ecological restoration, and specifically relates to a drought-resistant growth regulating compound and a method for using the compound in ecological restoration of arid areas. Background Art

[0002] With the rapid economic development, a large number of infrastructure construction projects are being carried out, which inevitably causes strong interference to the ecological environment of the project site, especially the slope wounds formed by earth and stone excavation. The habitat conditions are basically lost, which leads to a series of problems such as reduced biodiversity, soil erosion, frequent geological disasters, etc., which seriously endangers the safety of the project and the environment, landscape and sustainable development around the disturbed area. It is particularly urgent to achieve long-term ecological restoration of disturbed slopes.

[0003] As a mature ecological slope protection technology, the ecological restoration technology of vegetation concrete can realize the organic combination of traditional hard reinforcement and simple ecological restoration, and is widely applicable to the ecological restoration of various slopes. However, the water loss phenomenon easily caused by high and steep slopes and the increased drought caused by global warming can easily cause the habitat substrate to be in a drought state in the early stage of slope restoration. Drought stress affects the entire biological process of plants, affects the physiological and biochemical changes of plants, inhibits photosynthesis, leads to the loss of osmotic regulators and the imbalance of the antioxidant system, thus causing plant wilting and growth inhibition, which seriously affects the ecological restoration process of slopes and the stability of restored ecosystems. In addition, due to drought, the ecological restoration technology of vegetation concrete is prone to a series of problems in actual engineering applications, including sparse vegetation, poor soil, and serious nutrient loss, which not only greatly affects vegetation growth, but also causes serious soil erosion, thereby reducing slope stability, increasing the risk of unstable landslides and soil erosion, and limiting the application of vegetation concrete ecological restoration projects in arid areas.

[0004] Based on this, how to promote the growth of slope vegetation in arid areas, thereby enhancing the synergy between plants and soil, optimizing the sustainability and stability of ecological restoration, solving problems such as restricted plant growth and soil erosion caused by drought, and providing new technical references for vegetation concrete technology in arid areas are key issues that urgently need to be solved in vegetation concrete ecological restoration technology in arid areas. Summary of the invention

[0005] In view of the above problems, the present invention provides a drought-resistant growth regulating compound and a method for using the same for ecological restoration in arid areas. The present invention combines the novel EICP soil reinforcement technology with the vegetation concrete technology, and then uses the drought-resistant growth regulating compound to significantly enhance the ecological restoration effect of the vegetation concrete, improve the growth, photosynthesis and stress resistance of slope protection plants under different drought levels, reduce the risk of soil erosion on slopes and plants, and effectively promote the application of vegetation concrete technology in arid areas.

[0006] The specific scheme of the present invention is as follows: A drought-resistant growth regulating compound comprises a seed soaking agent and a spraying agent, wherein the seed soaking agent comprises 0.2-0.4wt% of trehalose, 0.3-0.5wt% of proline, 0.2-0.4wt% of fructan, 0.1-0.3wt% of chitosan, 0.001-0.003wt% of brassinolide, 0.006-0.01wt% of potassium humate, 4-6wt% of trisodium phosphate and the balance of water; The spraying agent comprises 0.2-0.4wt% trehalose, 0.3-0.5wt% proline, 0.2-0.4wt% fructan, 0.1-0.3wt% chitosan, 0.001-0.003wt% brassinolide, 0.006-0.01wt% potassium humate, nutrient components, stress resistance auxiliary components, spraying auxiliary components and water; The nutrient components include at least three of methionine, tryptophan, humic acid, potassium nitrate, gibberellin, ammonium nitrate, superphosphate or potassium dihydrogen phosphate; preferably, the spraying agent includes the following nutrient components in mass concentration: methionine 1-1.5 g / L, tryptophan 0.5-1 g / L, humic acid 0.5-1 g / L, potassium nitrate 2-2.5 g / L, gibberellin 5-8 g / L, ammonium nitrate 0.1-0.4 g / L, superphosphate 0.5-1 g / L and potassium dihydrogen phosphate 2-5 g / L; The spraying agent includes the following spraying auxiliary components in mass concentrations: 3-10 g / L of mannitol erythritol lipid, 5-20 mL / L of ethyl acetate and 50-100 mg / L of fruit acid.

[0007] The spraying agent includes the following stress-resistant auxiliary components in mass concentrations: 0.5-0.8 g / L of uniconazole, 2-5 g / L of flavonoids, 0.5-0.8 g / L of paclobutrazol, 1-5 g / L of streptomycin, and 0.5-1 g / L of phenylalanine; The method for using the above-mentioned drought-resistant growth regulating compound agent for ecological restoration in arid areas comprises the following steps: Seed soaking: Adding plant seeds to a seed soaking agent, soaking the seeds at 20-30° C. for 8-10 hours, then placing them in clean water, removing residues, and obtaining pretreated plant seeds; Preparation of plant concrete: Mix 90-110 parts of planting soil, 4-6 parts of cement, 5-7 parts of organic matter, 4-6 parts of greening additives, 3-7 parts of potassium humate and 1-5 parts of water retaining agent to obtain a base material; mix the base material with 10-12 parts of EICP solution and spray it onto the slope to form a 6-10 cm thick vegetation concrete base; 0.015-0.030 parts of pretreated plant seeds, 90-110 parts of planting soil, 2-3 parts of cement, 5-7 parts of organic matter, 2-3 parts of greening additives, 3-7 parts of potassium humate and 0.5-2.5 parts of water retaining agent are mixed evenly to obtain a surface material; the surface material is mixed evenly with 5-6 parts of EICP solution, and sprayed onto the base layer to form a 1-3 cm thick vegetation concrete surface layer; Spraying plants: After the plant seeds germinate, spray the spray evenly on the leaf surface and rhizomes of the seedlings. It can be sprayed in the early or middle stage of the drought period. Each period can be sprayed continuously or intermittently. Spray 3-10ml of spray on each plant until the leaf surface and stems are moist and have water droplets.

[0008] The EICP solution is prepared by mixing urease solution and binder in a mass ratio of 1:1.5; the urease solution is prepared by mixing crushed soybean powder and water in a mass ratio of 1:10 and then centrifuging to obtain the supernatant; the binder is prepared by mixing a calcium source and urea, wherein the molar ratio of the calcium source to the urea is 1:1.5.

[0009] The greening additive is the greening additive provided by Patent No. ZL01138343.7.

[0010] The plant seeds are selected from two or more of Poa annua, Sophora moracha, Buffalo grass, Cassia annua, Pennisetum or Amorpha fruticosa.

[0011] The organic matter is a material rich in organic matter, preferably at least one of rice husk, sawdust, distiller's grains, straw, peanut shell or wood chips.

[0012] The water retaining agent is a highly absorbent resin SAP, preferably at least one of polyacrylamide, potassium polyacrylate or sodium carboxymethyl cellulose.

[0013] The fructan polysaccharide is a plant fructan, selected from one or more of linear fructan, branched fructan, and mixed fructan; preferably linear inulin-type fructan, a new series of inulin-type fructan, linear timothy sugar-type fructan, mixed timothy sugar-type fructan, or a new series of timothy sugar-type fructan.

[0014] The drought-tolerant growth regulating compound may further comprise an optional insecticide component, preferably one of imidacloprid, pyrethroid insecticides or avermectin.

[0015] Plant growth requires a variety of nutrients and endogenous hormones, and single nutrients and regulators often cannot fully meet these needs. The present invention can quickly supplement the main nutrients such as carbon, nitrogen, phosphorus, potassium, etc. that plants urgently need through the composite regulator, while the nutritional components and stress-resistant auxiliary components can provide trace elements and growth regulators. The combination of the three can achieve nutritional complementarity and growth-promoting regulation. Single regulators are also easily lost due to leaching, volatilization, etc. Composite regulators can improve plant growth and development and the physical and chemical properties of soil, and improve the absorption capacity and utilization rate of plants and soil for nutrients.

[0016] Potassium humate is added to the vegetation concrete substrate components to improve the soil aggregate structure, increase the substrate's ability to retain water and fix fertilizer, enhance vegetation resistance and promote nutrient absorption by plant roots.

[0017] The EICP reinforcement technology is introduced in combination with the vegetation concrete technology to enhance the strength and anti-scour performance of the substrate, and reduce the amount of cement in the substrate while ensuring the strength of the substrate, thereby reducing the harm to the soil and vegetation caused by the excessive proportion of cement in the substrate, and improving the ability of soil and plants to work together to stabilize the slope.

[0018] The introduction of potassium humate into the vegetation concrete base material can activate the soil, improve the water and fertilizer retention capacity of the base material, enhance the stress resistance of plants, chelate nutrient elements to promote plant absorption and utilization, etc.

[0019] The beneficial effects of the present invention are as follows: 1. In the present invention, the substances such as trehalose, proline and chitosan in the growth regulating compound have significant environmental friendly characteristics, contain strong osmotic regulation ability, and the synergistic application of the substances has no rejection reaction. They can effectively improve the water retention performance of plant cells, minimize water loss, enhance plant photosynthesis and stress resistance, and then promote root vitality, help plants efficiently absorb and utilize soil moisture in arid environments, and significantly improve the drought resistance of plants.

[0020] 2. The potassium humate in the growth regulating compound provided by the present invention can not only be sprayed on the plant leaves to stimulate the activity of enzymes related to active oxygen metabolism in the plant body, regulate the active oxygen content in the plant body, and reduce the degree of membrane lipid peroxidation, thereby enhancing the plant's stress resistance, but also potassium humate can be applied to vegetation concrete substrates, and in synergistic action with water retaining agents, it can improve the physical and chemical properties of the soil, increase the soil aggregate content and compactness, improve the soil water retention and cation exchange capacity, and create a good soil environment for plant growth.

[0021] 3. The nutrient components involved in the present invention, when used in conjunction with the regulator, significantly optimize the adhesion efficiency of nutrients on the leaf surface by virtue of the physical and chemical properties of functional components such as surfactants, form a strong adhesion state, greatly prolong the retention period on the leaf surface, effectively curb the loss of nutrients due to leaching, volatilization, etc., and greatly reduce the overall nutrient loss. On the basis of strengthening plant stress resistance, the utilization efficiency of leaf surface nutrient components in plant photosynthesis, respiration, material transport and other physiological processes is improved, achieving a significant effect of synergistically improving plant nutrient supply and stress resistance.

[0022] 4. The spraying auxiliary stress resistance component of the present invention works synergistically with the regulator and the nutrient component to supplement plant nutrients, promote continuous and efficient absorption and utilization by the leaves, and thus enhance the drought resistance mechanism of the plant; compared with the disadvantages of the effects of each substance being easily fluctuating, the effective action time being limited, and the leaf absorption efficiency being low when applied alone, the compound component enables the functions of each component to form a complementary synergistic effect, which can organically combine the nutritional needs and drought resistance of plant seedlings, and significantly enhance the adaptation, tolerance and active repair ability of plants under drought stress.

[0023] 5. The vegetation concrete technology of the present invention uses EICP technology for reinforcement, which effectively solves the problem of soil barrenness and erosion caused by drought. It is applied in coordination with the water-retaining agent SAP in the improved substrate component. SAP adjusts the nucleation site, which not only enhances the cementing quality of the EICP solution and makes the solidification more uniform, but also absorbs the byproduct of EICP technology, ammonium chloride, to reduce the harm of the byproduct to plant growth and soil environment. The EICP reinforcement technology is used in coordination with the water-retaining agent and applied to the slope protection of vegetation concrete, which can significantly reduce the content of conventional hard reinforcement materials in the substrate - cement, so as to reduce the adverse effects of cement on soil and vegetation, while still maintaining excellent mechanical properties such as anti-scouring. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be described in detail below with reference to examples. The following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0025] Example 1 Step 1, Slope cleaning: Before spraying and planting, clear the slopes in arid areas that need ecological restoration, remove weeds, fallen leaves and branches, loose soil and rocks, etc. on the slopes; then trim the slope as a whole, use hammers and pickaxes to knock down the protruding and easily detached parts of the slope with obvious dangerous rocks, and fill in the obvious concave areas; finally, lay wire mesh on the slope and fix it with anchor nails and anchor rods.

[0026] Step 2, preparation and spraying of vegetation concrete base: Mix 100 parts of planting soil, 4 parts of cement, 6 parts of organic matter, 5 parts of greening additives, 5 parts of potassium humate and 3 parts of water-retaining agent potassium polyacrylate evenly, then mix evenly with 11 parts of EICP solution, and spray it onto the slope with a spraying construction equipment to form an 8 cm thick vegetation concrete base.

[0027] Step 3, preparation and spraying of vegetation concrete surface layer: preparing a seed soaking agent containing 0.2wt% trehalose, 0.3wt% proline, 0.2wt% fructan, 0.1wt% chitosan, 0.001wt% brassinolide, 0.006wt% potassium humate, 4wt% trisodium phosphate and the balance water; soaking the seeds of bluegrass and Sophora japonica in the seed soaking agent for 8h at a soaking temperature of 25°C; after the soaking, placing the seeds in clean water to remove the solution residue to obtain pretreated plant seeds; Mix 0.015 parts of pretreated plant seeds, 100 parts of planting soil, 2 parts of cement, 6 parts of organic matter, 2.5 parts of greening additives, 5 parts of potassium humate and 1.5 parts of water-retaining agent potassium polyacrylate evenly, then mix evenly with 5.5 parts of EICP solution, and spray it onto the base layer with a spray construction equipment to form a 2 cm thick vegetation concrete surface layer, and then cover it with a layer of non-woven fabric for moisture retention and maintenance.

[0028] Step 4, spraying the plants: uniformly mix 0.2wt% trehalose, 0.3wt% proline, 0.2wt% fructan, 0.1wt% chitosan, 0.001wt% brassinolide, 0.006wt% potassium humate, nutrient components, stress resistance auxiliary components, spraying auxiliary components and the remainder of water to obtain a spraying agent. The concentrations of the nutrients in the spray are as follows: 1.1 g / L methionine, 0.6 g / L tryptophan, 7 g / L humic acid, 2.2 g / L potassium nitrate, 6 g / L gibberellin, 0.2 / L ammonium nitrate, 0.7 / L superphosphate, 3 g / L potassium dihydrogen phosphate; the concentrations of the stress-resistant auxiliary components in the spray are as follows: 600 mg / L uniconazole, 3 g / L flavonoids, 600 mg / L paclobutrazol, 2 g / L streptomycin, 0.7 / L phenylalanine; the concentrations of the spray auxiliary components in the spray are as follows: 3 g / L mannitol erythritol lipid, 5 mL / L ethyl acetate, and 50 mg / L fruit acid. Under drought conditions, spray the spray on the leaves and rhizomes of the seedlings, 10 mL of spray per plant, until the leaves and stems are moist and have water droplets.

[0029] In the above preparation steps, the greening additive is the greening additive prepared in Example 1 of Patent No. ZL01138343.7.

[0030] The organic matter in both the base layer and the surface layer is 3 parts rice husk and 3 parts sawdust.

[0031] The EICP solution is prepared by mixing urease solution and binder in a mass ratio of 1:1.5; the urease solution is prepared by mixing crushed soybean powder and deionized water in a mass ratio of 1:10, and the supernatant obtained after centrifugation is the urease solution; the binder is prepared by mixing a calcium source and urea in a molar ratio of 1:1.5, and the calcium source is anhydrous calcium chloride.

[0032] Example 2 The difference from Example 1 is that the dosage of the following substances in the seed soaking agent and the spraying agent is: trehalose 0.3wt%, proline 0.4wt%, fructan 0.3wt%, chitosan 0.3wt%, brassinolide 0.002wt%, potassium humate 0.008wt%; buffalo grass and cassia tora were selected as plant seeds.

[0033] Example 3 The difference from Example 1 is that the dosage of the following substances in the seed soaking agent and the spraying agent is: trehalose 0.4wt%, proline 0.5wt%, fructan 0.4wt%, chitosan 0.4wt%, brassinolide 0.003wt%, potassium humate 0.01wt%; Pennisetum and Amorpha fruticosa were selected as plant seeds.

[0034] Example 4 The difference from Example 1 is that the water retaining agent is polyacrylamide.

[0035] Example 5 The difference from Example 1 is that the water retaining agent is sodium carboxymethyl cellulose.

[0036] Comparative Example 1 Different from Example 1, no nutrient components were added to the spray.

[0037] Comparative Example 2 The difference from Example 1 is that no stress-resistant auxiliary component is added to the sprayable agent.

[0038] Comparative Example 3 The difference from Example 1 is that the spraying agent does not contain any nutrient components or stress resistance auxiliary components.

[0039] Comparative Example 4 The difference from Example 1 is that no EICP solution is added.

[0040] Comparative Example 5 The difference from Example 1 is that no EICP solution is added, and the amounts of cement used in the base layer and the surface layer are 15 parts and 7.5 parts respectively.

[0041] Control group There was drought stress, and the plant seeds were not treated with seed soaking or spraying.

[0042] Test method: Simulated drought stress test: Under the condition of 25°C constant temperature controlled by an indoor intelligent artificial climate box, the concentration of PEG-6000 was set to 25% to simulate drought stress treatment, and 3 replicates were set.

[0043] Seed germination and germination index test: The germination time and number of seeds were measured within 20 days after sowing, and the germination standard was the radicle extending 2 mm out of the seed coat. Seed germination was observed and recorded once every 24 hours, and the number of germinated seeds was recorded. The radicle length of the germinated seeds was measured with a vernier caliper. After recording, the germinated seeds were removed in time, and the observation and record were continued until no seeds germinated for 3 consecutive weeks.

[0044] Plant height and biomass: Plant height was measured with a ruler; biomass: the dry weight of the plant's above-ground and below-ground parts was measured.

[0045] Osmotic regulating substance index test: The proline (Pro) content was determined by ninhydrin colorimetry, and the malondialdehyde (MDA) content was determined by thiobarbituric acid (TBA) colorimetry.

[0046] Shear strength of soil: The test specimens were prepared with a ring cutter and shear tests were carried out with a strain-controlled direct shear apparatus. The shear strength index of the vegetation concrete soil was determined according to Coulomb's law. Anti-scouring performance: The anti-scouring performance of vegetation concrete was tested by simulating rainfall intensity and runoff scouring. Vegetation concrete with different base material ratios was laid on a bracket with a length of 100 cm and a width of 10 cm, which was at an angle of 65° to the horizontal plane. After curing for 7 days, a certain flow of water was passed through the top of the bracket to simulate the runoff formed by rainfall. After 1 hour, the mass of the base material loss at the bottom of the bracket was weighed, and the unit base material erosion modulus was calculated (simulated rainfall intensity: 100 mm / h, design flow: 4000 cm³ / h).

[0047] The test results are shown in the table below: Table 1

[0048] The test in Table 1 shows that drought stress significantly reduces the germination ability and emergence rate index of plant seeds. After being regulated by the composite agent of the present invention, the seed germination indexes are all improved to varying degrees, which can significantly alleviate the inhibitory effect of drought stress on seed germination. Compared with the control group, there are significant differences. This shows that the product of the present invention can alleviate the inhibitory effect brought by drought stress and effectively promote the germination of seeds in a drought environment.

[0049] Table 2

[0050] Plant height and biomass can directly reflect the growth status and adaptability of plants in drought environments. As shown in Table 2, the use of sprays can significantly increase plant height and biomass accumulation under drought stress. Compared with plants without applying nutrient components and auxiliary stress-resistant components, the growth promotion effect of plants through seed soaking and spraying is more obvious.

[0051] Table 3

[0052] Proline and malondialdehyde are important organic osmotic regulating substances in plants. Drought stress induces the accumulation of proline and malondialdehyde in plant seedlings. The regulator of the present invention can significantly increase the accumulation of proline and reduce the content of malondialdehyde. It can be seen from the index data in Table 3 that during the drought stress process, through the use of seed soaking agents and spraying agents, the effect of plant leaf osmotic regulating substances is significantly higher than that of other control groups, and the effect of applying nutrient components and auxiliary stress-resistant components on plant resistance to adverse effects is also significantly higher than that of the control group without application, indicating that seed soaking treatment and spraying drought-resistant composite agents can significantly reduce the impact of drought stress on plants.

[0053] Table 4

[0054] It can be seen from the shear strength index and erosion modulus of each group of samples in Table 4 that the vegetation concrete substrate treated with EICP technology can significantly improve the strength of the substrate and reduce the risk of cement causing harm to the soil environment by using a water retaining agent as a nucleation site for EICP solution curing, while reducing the proportion of cement in conventional hard reinforcement materials. By comparing and analyzing Examples 1, 4, and 5, the effect of using polyacrylamide as a nucleation site for calcium carbonate in the EICP technology is more significant in enhancing the strength of the soil.

Claims

1. A drought-resistant growth regulating compound, comprising a seed soaking agent and a spraying agent, characterized in that: The seed soaking agent comprises 0.2-0.4wt% of trehalose, 0.3-0.5wt% of proline, 0.2-0.4wt% of fructan, 0.1-0.3wt% of chitosan, 0.001-0.003wt% of brassinolide, 0.006-0.01wt% of potassium humate, 4-6wt% of trisodium phosphate and the balance of water; The spraying agent comprises 0.2-0.4wt% trehalose, 0.3-0.5wt% proline, 0.2-0.4wt% fructan, 0.1-0.3wt% chitosan, 0.001-0.003wt% brassinolide, 0.006-0.01wt% potassium humate, nutrient components, stress resistance auxiliary components, spraying auxiliary components and water.

2. A drought-tolerant growth regulating composite agent according to claim 1, characterized in that: The nutrient components include at least three of methionine, tryptophan, humic acid, potassium nitrate, gibberellin, ammonium nitrate, superphosphate or potassium dihydrogen phosphate; Preferably, the spraying agent includes the following nutrient components in mass concentrations: methionine 1-1.5 g / L, tryptophan 0.5-1 g / L, humic acid 0.5-1 g / L, potassium nitrate 2-2.5 g / L, gibberellin 5-8 g / L, ammonium nitrate 0.1-0.4 g / L, superphosphate 0.5-1 g / L and potassium dihydrogen phosphate 2-5 g / L.

3. A drought-tolerant growth regulating composite agent according to claim 1, characterized in that: The spraying agent includes the following spraying auxiliary components in mass concentrations: 3-10 g / L of mannitol erythritol lipid, 5-20 mL / L of ethyl acetate and 50-100 mg / L of fruit acid.

4. A drought-tolerant growth regulating composite agent according to claim 1, characterized in that The spraying agent includes the following stress-resistant auxiliary components in mass concentrations: 0.5-0.8 g / L of uniconazole, 2-5 g / L of flavonoids, 0.5-0.8 g / L of paclobutrazol, 1-5 g / L of streptomycin and 0.5-1 g / L of phenylalanine.

5. A method for using the drought-tolerant growth regulating composite agent according to any one of claims 1 to 4 for ecological restoration in arid areas, characterized in that: The following steps are involved: Seed soaking: Adding plant seeds to a seed soaking agent, soaking the seeds at 20-30° C. for 8-10 hours, then placing them in clean water, removing residues, and obtaining pretreated plant seeds; Preparation of plant concrete: Mix 90-110 parts of planting soil, 4-6 parts of cement, 5-7 parts of organic matter, 4-6 parts of greening additives, 3-7 parts of potassium humate and 1-5 parts of water retaining agent to obtain a base material; mix the base material with 10-12 parts of EICP solution and spray it onto the slope to form a 6-10 cm thick vegetation concrete base; 0.015-0.030 parts of pretreated plant seeds, 90-110 parts of planting soil, 2-3 parts of cement, 5-7 parts of organic matter, 2-3 parts of greening additives, 3-7 parts of potassium humate and 0.5-2.5 parts of water retaining agent are mixed evenly to obtain a surface material; the surface material is mixed evenly with 5-6 parts of EICP solution, and sprayed onto the base layer to form a 1-3 cm thick vegetation concrete surface layer; Spraying plants: After the plant seeds germinate, spray the spray evenly on the leaf surface and rhizomes of the seedlings. It can be sprayed in the early or middle stage of the drought period. Each period can be sprayed continuously or intermittently. Spray 3-10ml of spray on each plant until the leaf surface and stems are moist and have water droplets.

6. The method according to claim 5, characterized in that The EICP solution is prepared by mixing urease solution and binder in a mass ratio of 1:1.5; the urease solution is prepared by mixing crushed soybean powder and water in a mass ratio of 1:10 and then centrifuging to obtain the supernatant; the binder is prepared by mixing a calcium source and urea, wherein the molar ratio of the calcium source to the urea is 1:1.

5.

7. The method according to claim 5, characterized in that The greening additive is the greening additive provided by Patent No. ZL01138343.

7.

8. The method according to claim 5, characterized in that The plant seeds are selected from two or more of Poa annua, Sophora moracha, Buffalo grass, Cassia annua, Pennisetum or Amorpha fruticosa.

9. The method according to claim 5, characterized in that The organic matter is a material rich in organic matter, preferably at least one of rice husk, sawdust, distiller's grains, straw, peanut shell or wood chips.

10. The method according to claim 5, characterized in that The water retaining agent is a highly absorbent resin SAP, preferably at least one of polyacrylamide, potassium polyacrylate or sodium carboxymethyl cellulose.

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