Composite material manufacturing formula, composite body and method for ecological restoration and pollution purification

Abstract

The present invention discloses a composite material manufacturing formula, composite body and method for ecological restoration and pollution purification, which consists of seeds and a matrix. The seed content is 18 - 25 g / m², and the matrix includes the following components: mycorrhizal fungi AMF granule, peat soil, biochar, nano zero-valent iron, soil binder, porous material, plant fiber and water. Each component is uniformly mixed in proportion; the dosage of the matrix is 0.5 - 4 kg / m² by weight; the matrix includes the following components: 1 - 5 g / m² of mycorrhizal fungi AMF granule, 200 - 300 g / m² of peat soil, 50 - 150 g / m² of biochar, 1 - 5 g / m² of nano zero-valent iron, 0.5 - 18 g / m² of soil binder, 40 - 600 g / m² of porous material, 50 - 150 g / m² of plant fiber, and 400 - 800 g / m² of water. The seeds are coated with a microbial inoculant mainly composed of mycorrhizal fungi AMF granule at a ratio of 1 - 5‰ (W / W). The present invention is used for in-situ remediation of polluted sites and restoration of vegetation in adverse soils, which can not only reduce the migration of pollutants to the ground due to leaching, but also purify the volatilization of VOCs in the soil and promote plant growth.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural environmental protection, and particularly relates to a composite material manufacturing formula, a composite body and a method for ecological restoration and pollution purification. Background Art

[0002] Long-term production and living activities of human society have affected soil, water sources and the atmosphere to varying degrees. Coupled with natural disasters and climate change, landslides, desertification, salinization, infertility, etc. have occurred, resulting in a large number of polluted sites and adverse soils. There are generally problems such as heavy metal-organic compound pollution, hardening, and infertility to varying degrees. The demand for ecological restoration is urgent, difficult and costly. In recent years, the restoration methods mainly include surface covering and plant growth promotion, which are used to improve the survival rate of plants, prevent wind and sand, and prevent soil erosion. However, such methods do not have the functions of purifying soil, water and air environmental pollution (for example: removing VOCs) and ecological restoration and treatment functions. Summary of the Invention

[0003] In view of the technical problems mentioned in the background art, the present invention provides a composite material manufacturing formula, a composite body and a method for ecological restoration and pollution purification.

[0004] To achieve the above object, the present invention provides a manufacturing formula for a multi-layer composite material for ecological restoration and pollution purification, which is composed of seeds and a matrix. The seed content is 18-25 g / m 2 , and the matrix includes the following components: mycorrhizal fungus AMF granule, peat soil, biochar, nano zero-valent iron, soil binder, porous material, plant fiber and water. Each component is uniformly mixed in proportion; the dosage of the matrix is 0.5-4 kg / m 2 , by weight; the matrix includes the following components: mycorrhizal fungus AMF granule 1-5 g / m 2 , peat soil 200-300 g / m 2 , biochar 50-150 g / m 2 , nano zero-valent iron 1-5 g / m 2 , soil binder 0.5-18 g / m 2 , porous material 40-600 g / m 2 , plant fiber 50-150 g / m 2 , water 400-800 g / m 2 .

[0005] Further, the seeds are coated with a microbial inoculant mainly composed of mycorrhizal fungus AMF granule at 1-5‰ (W / W).

[0006] Further, the seeds are composed of one or more of shrub species in combination with Lysimachia christinae, Pteris vittata, Suaeda glauca, Bromus inermis, Lolium perenne, Sedum spectabile, and Agrostis stolonifera.

[0007] Further, the seeds are composed of Vetiveria zizanioides or Amorpha fruticosa in combination with one or more of Cynodon dactylon, Paspalum notatum, Zoysia japonica, Manila grass, Buchloe dactyloides, and Bermuda grass.

[0008] Further, the present invention also provides a multi-layer structure composite for ecological restoration and pollution purification, including a flexible medium mixing layer prepared according to the above formula. The multi-layer structure composite for ecological restoration and pollution purification is in a layered structure as a whole, including a soluble fiber paper water absorption protection layer located on the upper and lower layers and a flexible composite medium seed layer clamped in the middle layer. The layered structure is stitched together by a sewing machine using a smooth wire mesh, activated carbon fiber rope, or cotton thread for double-sided wire drawing. The flexible composite medium seed layer includes several layers of plant fiber paper base layers located at the bottom layer and the flexible medium mixing layer coated and solidified on the plant fiber paper base layer one or more times. After the multi-layer structure composite for ecological restoration and pollution purification is laid, it is irrigated with 3-5‰ wood vinegar solution for root irrigation, and the leaves are sprayed with 3-5‰ wood vinegar solution after the seeds germinate.

[0009] Further, the plant fiber paper base layer is made of soluble water-absorbing plant fiber paper.

[0010] Further, the present invention also provides a method for manufacturing a multi-layer structure composite for ecological restoration and pollution purification, including the following steps:

[0011] S1: Mix the seeds evenly, and coat the mixed seeds with a microbial inoculant mainly composed of mycorrhizal fungi AMF granules at 1-5‰ (W / W).

[0012] S2: Homogenize the coated seeds, mycorrhizal fungi AMF granules, and nano-zero valent iron in a small homogenizer for 20-40 minutes.

[0013] S3: Homogenize peat soil, biochar, porous materials, and plant fibers in a large homogenizer for 30-60 minutes, add the mixture processed in S2, and then homogenize for another 30-60 minutes.

[0014] S4: Add the mixture processed in S3 to a blender, add a soil binder, stir for 20-40 minutes, and then evenly add water and stir into a thick paste that can be drawn into a 30-40 cm long wire as the raw material for the flexible medium mixing layer for standby.

[0015] S5: uniformly coating the thick paste slurry prepared in S4 once or multiple times on a soluble water-absorbing plant fiber paper base layer, wherein the soluble water-absorbing plant fiber paper base layer is one or more layers, to form a flexible composite medium seed layer;

[0016] S6: drying the flexible composite medium seed layer prepared in S5 in air at 5-15°C in a circulating ventilation environment, or in a cool and dry place for 6-24 hours, until the coated medium solidifies into a flexible rubber-like shape that can be rolled and has no free water;

[0017] S7: Glue 2-5 layers of soluble plant fiber paper on both sides of the coated and dried flexible composite medium seed layer. Use starch to bond each layer of fiber paper to form a water-absorbing protective layer to protect the matrix, seeds, etc. from peeling, and absorb water to keep warm and fertilize when laid; and sew the flexible composite medium seed layer and the soluble fiber paper water-absorbing protective layer into a blanket within 6-24 hours.

[0018] Furthermore, when the multi-layer structural complex for ecological restoration and pollution purification is used on a slope with a slope of less than 15 degrees, S7 uses activated carbon fiber rope or cotton thread to sew a blanket. After laying and fixing, a 3-5mm thick matrix plus seeds are sprayed on the surface. After the sprayed surface crust hardens for 24 hours, the nano-light-purifying material is sprayed, and water or nutrient solution is sprayed to germinate after 24 hours.

[0019] Furthermore, when the multi-layer structure complex for ecological restoration and pollution purification is used on a slope with a slope greater than or equal to 15 degrees, S7 uses a clean silk screen to sew into a blanket.

[0020] Furthermore, the clean wire mesh is made of plant fiber wire or plant fiber rope, with 1-3% (w / w) nano-TiO 2 After being immersed in the suspension for 1-2 hours, the mixture is carbonized at 60-120℃ for 2-4 hours to form a stable and firm C-TiO 2 Use after the coating has cured.

[0021] Compared with the prior art, the advantages of the present invention are: the multi-layer composite material manufacturing formula for ecological restoration and pollution purification provided by the present invention is rich in carbon-based adsorption carrier materials, mycorrhizal fungi (AMF), nano zero-valent iron, etc., which not only promotes plant growth, but also allows the roots to effectively attach to the matrix and the land, with good protection, and can further remove pollutants and improve anti-pollution capabilities. The multi-layer structural complex designed by the present invention for ecological restoration and pollution purification is used for in-situ restoration of contaminated sites and vegetation restoration. Its surface is provided with impregnated NM nano-catalytic oxidation materials, which decompose organic pollution by combining with sunlight, reduce the migration of pollutants to the underground due to leaching, and also block the volatilization of VOCs in the soil and effectively degrade them. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the layered structure of the multi-layer structure composite for ecological restoration and pollution purification of the present invention;

[0023] Figure 2 Schematic diagram of the manufacturing process of the multi-layer structure composite for ecological restoration and pollution purification of the present invention. Detailed implementation manners

[0024] Hereinafter, for the convenience of those skilled in the art to understand the technical solution of the present invention, further description will be made with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention.

[0025] In the following detailed description, for the purpose of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0026] It should be noted that the manufacturing formula of the multi-layer composite material for ecological restoration and pollution purification provided by the present invention is rich in carbon-based adsorption carrier materials, mycorrhizal fungi (AMF), nano zero-valent iron, etc. It can not only promote plant growth, enable the roots to effectively adhere to the substrate and the land, with good protection performance, but also further remove pollutants and improve the anti-pollution ability. The formula mainly consists of seeds and a substrate. The dosage of the seeds is 18 - 25 g / m 2 , and the seeds are coated with a microbial inoculant mainly composed of mycorrhizal fungi AMF granules at a ratio of 1 - 5‰ (W / W). The selection of seeds is divided into the north and the south, and different varieties of seeds are selected for different purposes. For example, in the northern region, Elymus dahuricus, Cynodon dactylon, Artemisia argyi, Medicago sativa, Festuca arundinacea, Lolium perenne, etc. are commonly used. And the present invention adds hyperaccumulator seeds such as Lysimachia christinae, Pteris vittata, Suaeda glauca, Bromus inermis, Lolium perenne, Sedum spectabile, Agrostis stolonifera, etc., and cooperates with deep-rooted plants such as Amorpha fruticosa to strengthen soil and water conservation, and is used for the environmental restoration and pollution purification of heavy metals and organic matters in the northern and northwestern regions of China. In the southern region, Cynodon dactylon, Paspalum notatum, Zoysia japonica, Manila grass, Buchloe dactyloides, Bermuda grass, etc. are commonly used to purify heavy metals and organic pollution, and cooperate with Vetiveria zizanioides or Amorpha fruticosa, etc. to prevent soil erosion.

[0027] In this embodiment, the substrate includes the following components: mycorrhizal fungi AMF, peat soil, biochar, nano zero-valent iron, soil binder, porous material, plant fiber and water, and the components are uniformly mixed in proportion; the dosage of the substrate is 0.5 - 4 kg / m 2 , by weight; the substrate includes the following components: 1 - 5 g / m of mycorrhizal fungi AMF granules 2 , 200 - 300 g / m of peat soil 2, biochar 50 - 150 g / m 2 , nano zero-valent iron 1 - 5 g / m 2 , soil binder 0.5 - 18 g / m 2 , porous material 40 - 600 g / m 2 , plant fiber 50 - 150 g / m 2 , water 400 - 800 g / m 2 .

[0028] In this embodiment, the carbon-based adsorption carrier material, mycorrhizal fungi, nano zero-valent iron and pioneer plant seeds are rich, and through the multi-element structure-effect optimization and gain combination of pioneer (host) plants, microorganisms, iron-carbon microelectrolysis and adsorption enrichment. Among the added ingredients, the mycorrhizal fungi AMF can form a mutualistic symbiont with the roots of more than 90% of the terrestrial vascular plants. It has the characteristics of stabilizing soil aggregate structure, preventing soil erosion, optimizing soil water, fertilizer, gas and heat conditions, and it itself enriches N, P, K and organic matter nutrient components, promotes soil material cycle, regulates the balance of plant species relationships. In addition, it can increase the types and activities of enzymes in the soil, improve the degree of looseness and ripeness, improve physical, chemical and microbial properties. At the same time, it can repair and reconstruct degraded, adverse and polluted soils, enhance plant stress resistance, promote plant growth. Finally, it can optimize the composition structure and phenological succession of the ecosystem, maintain species diversity and community stability, and restore and reconstruct degraded vegetation and ecosystem. Nano zero-valent iron has the characteristics of large specific surface area and strong reducibility, and mainly undergoes adsorption, ion exchange, redox, coprecipitation, complexation and other reactions, which are used for the removal of heavy metals or halogenated organic compounds, etc., and shows good application prospects in environmental remediation. Nano zero-valent iron and small particle activated carbon, on the one hand, can form an iron-carbon electrochemical reaction medium to purify pollution, and on the other hand, together with the plant mycorrhizal life community, through symbiosis, coating, winding and extension, achieve pollution purification and soil improvement from the surface to 0.3 - 3.0 m underground.

[0029] Please refer to Figure 1 , the present invention also provides a multi-layer structure composite for ecological restoration and pollution purification. Please refer to Figure 1, is a schematic diagram of the hierarchical structure of the multi-layer structure composite for ecological restoration and pollution purification of the present invention, including a soluble fiber paper water absorption protection layer located on the upper and lower layers and a flexible composite medium seed layer clamped in the middle layer. The layered structure is stitched together by a sewing machine using a light purification wire mesh, activated carbon fiber rope or cotton thread for double-sided wire drawing. The flexible composite medium seed layer includes several layers of plant fiber paper base layers located at the bottom layer and a flexible medium mixed layer coated and solidified on the plant fiber paper base layer once or multiple times. The flexible medium mixed layer is made using the manufacturing formula of the above multi-layer composite material for ecological restoration and pollution purification. The plant fiber paper base layer is made of soluble water-absorbing plant fiber paper. In this embodiment, the light purification wire mesh uses plant fiber thread or plant fiber rope, and after impregnation in a 1-3% (w / w) nano-TiO 2 suspension for 1-2 h, it is subjected to anaerobic dry distillation carbonization at 60-120 °C for 2-4 h until a stable and firm C-TiO 2 cured coating is formed on the surface and then used. Therefore, it has all the functions of nano light purification, can retain water and fertilizer, improve the overall mechanical strength, and is convenient for laying and recycling. In this embodiment, the flexible composite medium seed layer has a matrix for seed germination and growth, supplies water and fertilizer, and can adsorb, enrich and carry nutrients, water and microorganisms. The composite body involved in this embodiment is subjected to root irrigation treatment with 3-5‰ wood vinegar solution after laying, and foliar spraying with 3-5‰ wood vinegar solution.

[0030] As Figure 2 shown, the present invention also provides a manufacturing method of the above multi-layer structure composite for ecological restoration and pollution purification, which is specifically implemented as follows:

[0031] The first step: Mix the seeds evenly, and coat the mixed seeds with a microbial inoculant mainly composed of mycorrhizal fungi AMF at 1-5‰ (W / W).

[0032] The second step: Uniformly mix the coated seeds with mycorrhizal fungal granules and nano zero-valent iron using a small homogenizer for 20-40 minutes.

[0033] The third step: Uniformly mix peat soil, biochar, porous materials, and plant fibers using a large homogenizer for 30-60 minutes, add the mixture processed in the second step, and then uniformly mix for another 30-60 minutes.

[0034] The fourth step: Add the above processed mixture to a blender, add a soil binder, stir for 20-40 minutes, and then uniformly add water and stir into a thick paste slurry that can be drawn into a 30 cm - 40 cm long filament as the raw material for the flexible mixed medium layer for standby;

[0035] The fifth step: Uniformly coat the above-made thick paste slurry on the soluble water-absorbing plant fiber paper base layer once or multiple times. The soluble water-absorbing plant fiber paper base layer is used in one or multiple layers to form a flexible composite medium seed layer;

[0036] Step 6: Circulate and ventilate the prepared flexible composite medium seed layer in air at 5 - 15°C, or dry it in a cool and dry place for 6 - 24 h until the coated medium solidifies into a flexible rubber sheet that can be curled and has no free water.

[0037] Step 7: Double - bond 2 - 5 layers of soluble plant fiber paper to the dried flexible composite medium seed layer. Starch is used to bond between each layer of fiber paper to form a water - absorbing protective layer to protect the substrate, seeds, etc., prevent peeling, and absorb water, keep warm, and maintain fertilizer during laying. And sew the flexible composite medium seed layer and the soluble fiber paper water - absorbing protective layer into a blanket within 6 - 24 h.

[0038] In this embodiment, a flexible mixed medium layer is formed through the above - mentioned ingredients, making the plant survival rate, coverage, above - and below - ground biomass, mycorrhizal infection rate, pollutant removal rate, underground migration rate of characteristic pollutants, etc., of the composite material treatment technology significantly better than the traditional single treatment technology.

[0039] In this embodiment, the principle of thin - layer penetration is overall applied, that is, a relatively thin mixed base material containing mycorrhizal fungi (AMF) and carrier materials, with a thickness of about 1 cm, can penetrate deep into the soil along with the plant roots driven by the natural growth force of plants. At the same time, it can also bring the improved medium, mycorrhizal fungi (AMF), microorganisms, etc. to the deep soil, generally reaching a depth of 30 - 40 cm, and some can reach a depth of 1 m, so as to play a role in loosening and improving the soil and removing pollutants. Therefore, in addition to the conventional planar or slope applications, the composite body involved in this embodiment can also be applied to the bottom of various pits, the bottom of ponds, wrapping the roots of transplanted arbors, etc. Since the materials used in the manufacture of the composite body are all degradable environmental protection materials, it will not cause secondary pollution to the environment.

[0040] In this embodiment, the soluble plant fiber paper has a 2 - 5 - layer structure and is made of soluble and water - absorbing plant fiber paper, such as wood pulp, bamboo pulp, straw pulp or cotton pulp paper, which has the functions of protecting the flexible composite medium seed layer, preventing material leakage during storage, transportation and laying, as well as retaining water and fertilizer and preventing soil erosion. Specifically, when implementing, the plant fiber paper should be selected as a plant pulp paper with strong water - absorbing ability, not rotting after being soaked in water for more than 10 minutes, and good flexibility.

[0041] Specifically, when the multi - layer structure composite body for ecological restoration and pollution purification made by this method is used on a slope with an inclination angle less than 15 degrees, it is sewn into a blanket with activated carbon fiber ropes or cotton threads. After laying and fixing, spray a layer of substrate plus seeds with a thickness of 3 - 5 mm on the surface. After the surface of the spray - sown layer forms a crust and hardens for 24 hours, spray nano - photocatalytic purification materials, and then spray water or nutrient solution to germinate after 24 hours. If it is used on a slope with an inclination angle greater than or equal to 15 degrees, it is sewn into a blanket with a photocatalytic purification wire mesh.

[0042] This embodiment uses wood vinegar for spraying, which has a broad spectrum of antibacterial activity, antibacterial efficacy and good quality improvement and yield increase effects. Wood vinegar can produce significant synergistic effects when combined with other drugs, reducing the amount of pesticides used. It has the effect of promoting the germination, rooting and growth of crop seeds. A certain concentration of wood vinegar stock solution and refined solution have a promoting effect on seed germination and root growth after germination. After chelating with biochar, it can change the structure and quantity of soil microbial groups, promote the decomposition and utilization of organic matter, thereby improving the soil's granular structure, air permeability and water permeability, and promote the decomposition and utilization of organic matter to improve fertilizer utilization and accelerate crop growth.

[0043] In summary, the multilayer composite material manufacturing formula for ecological restoration and pollution purification provided by the present invention is rich in carbon-based adsorption carrier materials, mycorrhizal fungi (AMF), nano zero-valent iron, etc., which not only promotes plant growth, but also allows the roots to effectively attach to the matrix and the land, with good protection, and can further remove pollutants and improve anti-pollution capabilities. The multilayer structural complex designed by the present invention for ecological restoration and pollution purification is used for in-situ restoration of contaminated sites and vegetation restoration. The surface layer is provided with impregnated NM nano-catalytic oxidation materials, which decompose organic pollution by combining with sunlight, reduce the migration of pollutants to the underground due to leaching, and also block the volatilization of VOCs in the soil and effectively degrade them.

[0044] In addition, the multi-layer structure composite for ecological restoration and pollution purification designed in this embodiment has a simple construction process, a fast construction speed, and a daily construction area of ​​tens of thousands of square meters, which greatly improves the construction efficiency. Construction can be carried out all year round without being affected by seasons, making large-scale slope greening protection possible. This embodiment has strong selectivity, and can select a suitable seed composite according to user requirements, local climate conditions, annual rainfall, soil conditions and other comprehensive factors, thereby improving the adaptability of seeds, being highly targeted and having a high survival rate. The composite product made in this embodiment is low in price, highly economical, and has a high comprehensive cost-effectiveness, and can be applied to various harsh natural environments, and can even be constructed on rocks and planted in deserts.

[0045] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. Method for manufacturing a multi-layer structure composite for ecological restoration and pollution purification, characterized in that, it includes the following steps: S1: Mix the seeds evenly, and coat the mixed seeds with a microbial inoculant mainly composed of mycorrhizal fungus AMF granules at 1-5‰ (W / W); S2: Uniformly mix the coated seeds, mycorrhizal fungus AMF granules, and nano zero-valent iron in a small mixer for 20-40 minutes; S3: Uniformly mix peat soil, biochar, porous materials, and plant fibers in a large mixer for 30-60 minutes, add the mixture processed in S2, and then mix for another 30-60 minutes; S4: Add the mixture processed in S3 to a blender, add a soil binder, stir for 20-40 minutes, and then evenly add water and stir into a thick paste that can be drawn into a 30 cm - 40 cm long filament as the raw material for the flexible medium mixed layer for standby; In the steps S2 - S4, the dosages of the seeds and the substrate are in terms of weight, with the seed amount being 18 - 25 g / m 2 , and the dosage of the substrate being 0.5 - 4 kg / m 2 ; among them, the substrate includes the mycorrhizal fungus AMF granule, peat soil, biochar, nano zero-valent iron, soil binder, porous material, plant fiber, and water. Each component substance is uniformly mixed in proportion, including: 1 - 5 g / m of the mycorrhizal fungus AMF granule 2 , 200 - 300 g / m of peat soil 2 , 50 - 150 g / m of biochar 2 , 1 - 5 g / m of nano zero-valent iron 2 , 0.5 - 18 g / m of soil binder 2 , 40 - 600 g / m of porous material 2 , 50 - 150 g / m of plant fiber 2 , and 400 - 800 g / m of water 2 ; S5: Uniformly coat the thick paste made in S4 on the soluble water-absorbing plant fiber paper base layer one or more times. The soluble water-absorbing plant fiber paper base layer is composed of one or more layers to form a flexible composite medium seed layer; S6: Circulatingly ventilate and dry the flexible composite medium seed layer made in S5 in the air at 5-15°C, or dry it in a cool and dry place for 6-24 hours until the coated medium solidifies into a flexible rubber-like shape that can be curled and has no free water; S7: Double-sidedly bond 2-5 layers of soluble plant fiber paper to the dried flexible composite medium seed layer. Starch is used to bond between each layer of fiber paper to form a water-absorbing protective layer to protect the matrix and seeds from peeling off, and it can absorb water, keep warm, and maintain fertility during laying; and sew the flexible composite medium seed layer and the soluble fiber paper water-absorbing protective layer into a blanket within 6-24 hours; In step S7, a smooth wire mesh is used to sew into a blanket, and a stable and firm C-TiO2 solidified coating is formed on the surface; the smooth wire mesh is made of plant fiber thread or plant fiber rope, impregnated in a 1-3% (w / w) nano-TiO2 suspension for 1-2 hours, and then carbonized by anaerobic dry distillation at 60-120°C for 2-4 hours until a stable and firm C-TiO2 solidified coating is formed on the surface before use.

2. The method for manufacturing a multi-layer structure composite for ecological restoration and pollution purification according to claim 1, characterized in that, the seeds are composed of one or several of shrub species combined with one of Lysimachia christinae, Pteris vittata, Suaeda glauca, Bromus inermis, Lolium perenne, Sedum spectabile, Agrostis stolonifera.

3. The method for manufacturing a multi-layer structure composite for ecological restoration and pollution purification according to claim 1, characterized in that, the seeds are composed of Vetiveria zizanioides or Amorpha fruticosa combined with one of Cynodon dactylon, Paspalum notatum, Zoysia japonica, Manila grass, Buchloe dactyloides, Bermuda grass.

4. A multi-layer structure composite for ecological restoration and pollution purification, manufactured by the manufacturing method described in claim 1, characterized in that, The multi-layer structure composite for ecological restoration and pollution purification as a whole has a layered structure, including a soluble fiber paper water absorption protection layer located on the upper and lower layers and a flexible composite medium seed layer clamped in the middle layer. The layered structure is stitched together on both sides by a sewing machine using a smooth wire mesh, activated carbon fiber rope or cotton thread. The flexible composite medium seed layer includes several layers of soluble water-absorbing plant fiber paper located at the bottom layer and a flexible medium mixed layer coated and solidified on the plant fiber paper base layer once or multiple times. The flexible medium mixed layer is composed of the seeds and the matrix, by weight parts; The seed content is 18 - 25 g / m 2 , and the dosage of the substrate is 0.5 - 4 kg / m 2 ; substrate It includes the following components: mycorrhizal fungi AMF granule, peat soil, biochar, nano zero-valent iron, soil binder, porous material, plant fiber and water, and the substances of each component are uniformly mixed in proportion; the substrate includes the following components: 1-5 g / m of mycorrhizal fungi AMF granule 2 , 200-300 g / m of peat soil 2 , 50-150 g / m of biochar 2 , 1-5 g / m of nano zero-valent iron 2 , 0.5-18 g / m of soil binder 2 , 40-600 g / m of porous material 2 , 50-150 g / m of plant fiber 2 , 400-800 g / m of water 2 ; After the multi-layer structure complex for ecological restoration and pollution purification is laid, root irrigation treatment is carried out with 3-5‰ wood vinegar liquid, and foliar spraying is carried out with 3-5‰ wood vinegar liquid after the seeds germinate.

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