CN107710945B

CN107710945B - Sand dune slope greening device and sand dune slope greening method

Info

Publication number: CN107710945B
Application number: CN201710979765.8A
Authority: CN
Inventors: 赵民忠; 高明清; 尤金成
Original assignee: Tibet Junfu Environmental Recovery Co ltd
Current assignee: Tibet Junfu Environmental Recovery Co ltd
Priority date: 2017-10-19
Filing date: 2017-10-19
Publication date: 2020-07-24
Anticipated expiration: 2037-10-19
Also published as: CN107710945A

Abstract

The invention relates to the field of environmental protection and discloses a sand dune slope greening device. The invention discloses a dune slope greening device which comprises an ecological bag, a connecting buckle with a pawl, a drain pipe, a soil improvement fiber composition, vegetation seeds and an anti-erosion fiber composition. The ecological bag disclosed by the invention has excellent physical properties, good water permeability and good ultraviolet resistance. The sand dune side slope greening device disclosed by the invention better solves the problems of soil and nutrient substances required by plant growth of the sand dune side slope so as to achieve the purposes of restoring the natural environment, protecting ecological balance and beautifying the environment, the plant growth and root system rooting and knotting effectively stabilize the sand dune, the aged growth of the plant effectively improves sandy soil layer, improves ecological cycle and achieves certain noise reduction and dust removal effects.

Description

Sand dune slope greening device and sand dune slope greening method

Technical Field

The invention relates to the field of environmental protection, in particular to a sand dune side slope greening device and a sand dune side slope greening method.

Background

The desert area accounts for 20 percent of the total land area, the desertification area of China is 263.6 ten thousand square kilometers, the total land area accounts for 27.46 percent, and the land is expanded at the speed of 6 ten thousand square kilometers each year and faces the threat of desertification. The desertification is a serious ecological disaster, seriously restricts the economic development and threatens the ecological safety. Nearly 4 hundred million people are affected by desertification, and phenomena of sand burying agriculture, railways, highways, reservoir deposition, dams and the like are frequent, so that the life and property safety of people is seriously threatened. The desertification mainly occurs in western regions, minority nationality residential areas and border regions, so that poverty is aggravated, the poor and rich differences between east and west regions, border regions, inland regions and nationality are further increased, the climate change is aggravated, and the carbon balance is damaged by vegetation loss. Although the state starts to implement the construction project of the 'three-north' protection forest system and the national sand prevention and control project; implementing afforestation and grass planting in key suitable areas; large-scale sand-sealing grazing prohibited firewood prohibited cultivation; the measures of sand pressing and sand fixing of the grid of the moving dune are poor in effect of controlling the side slope of the dune, so that the technical problem to be solved by technical personnel in the field is to develop a sand dune side slope greening device and a sand dune side slope greening method which are better in effect and more environment-friendly.

Disclosure of Invention

In view of the above, the invention discloses a sand dune side slope greening device and a sand dune side slope greening method, which can effectively solve the technical defects that the treatment effect is poor and the ecological balance is easily damaged in the current sand dune side slope greening technology.

The technical scheme adopted by the invention is as follows:

the invention discloses an ecological bag, which comprises an ecological bag, a connecting buckle with a pawl, a drain pipe, a soil improvement fiber composition, vegetation seeds and an anti-erosion fiber composition;

the ecological bag is fixedly arranged on the surface of the dune side slope through a pawl of the connecting buckle to form a primary dune side slope greening device;

the drainage pipe is fixed in the gap between the adjacent ecological bags, so that the drainage pipe is in contact with the slope surface of the dune side slope to form a secondary dune side slope greening device;

the mixture of the soil improvement fiber composition and the vegetation seeds is arranged on the surface of the secondary sand dune side slope greening device to form a tertiary sand dune side slope greening device;

the mixture of the erosion-resistant fiber composition and the vegetation seeds is placed on the surface of the three-level dune slope greening device to form the dune slope greening device;

wherein the soil improving fiber composition comprises water, fertilizer and soil improving fiber;

the soil improving fiber comprises: wood fiber, biochar, humus, mushroom residue, polysaccharide, seaweed extract, carboxymethyl chitosan, biochemical potassium fulvate, diatomite, shell powder, trichoderma, azotobacter and composite bacillus;

the erosion resistant fiber composition comprises water, fertilizer, and erosion resistant fibers;

the erosion resistant fiber includes: wood fiber, water-retaining agent, artificial interlocking fiber, high molecular polymer, particle micropore base, attapulgite powder, chitosan, adhesive, kaolin and coloring agent.

Preferably, the preparation method of the ecological bag comprises the following steps:

1) mixing polypropylene colloidal particles and anti-aging polypropylene master batches to obtain a mixture;

2) heating and melting the mixture obtained in the step 1), extruding the mixture into filaments, oiling, drafting, curling, cutting, drying and shaping to obtain the anti-aging polypropylene short fiber;

3) and (3) carrying out opening, carding, lapping, needling, heat setting and winding processes on the anti-aging polypropylene short fibers to produce the anti-aging ecological bag.

Preferably, the step 1) comprises the following components in parts by weight:

95-97 parts of polypropylene rubber particles;

3-5 parts of anti-aging polypropylene master batch.

Furthermore, the polypropylene short fiber added with the ultraviolet aging resistant master batch in the ecological bag is subjected to carding, lapping, needling and heat setting to form the single-sided fluffed non-woven fabric, and the single-sided fluffed non-woven fabric has the advantages of high strength, small deformation, isotropy, hydrophilic ventilation and ultraviolet aging resistance.

Preferably, the ecological bag further comprises sewing threads, and the sewing threads are prepared by adding the ultraviolet aging resistant master batches.

Preferably, the vegetation seeds are cold-resistant, drought-resistant, barren-resistant and adaptable to the local climatic environment and geographical location.

Preferably, the pawls of the connecting buckle include front pawls and rear pawls.

Furthermore, the connecting buckle is made of a high-strength material formed by extrusion molding of polypropylene. The connecting buckle made of polypropylene can resist the erosion of ultraviolet rays, is not influenced by chemical substances in soil, and does not generate qualitative change or corrosion.

Furthermore, the color of ecological bag is green, by the ecological wall that ecological bag built is whole green, presents the sensation of being vital, and vegetation is grown the back, and whole color is coordinated, can not appear obtrusive sensation.

Furthermore, the pawl is distributed in a position and matched with structural mechanics, concentrated stress can be reasonably dispersed, the stress characteristics of the flexible structure of the pawl are fully exerted, a stable regular triangle reinforcing and locking structure (a regular triangle stabilizing structure formed by one ecological bag on the upper layer and two ecological bags on the lower layer) is formed, the shearing force between the ecological bags is increased, and the tensile strength of the ecological system is further enhanced.

Furthermore, the connecting buckle is arranged between the ecological bags and staggered with the gaps between the upper ecological bag and the lower ecological bag so as to be connected and fixed with other ecological bags better.

Preferably, the bag body has a length of 810mm and a width of 430mm, the ecological geotextile with a width of 900mm is cut into a bag piece with a length of 830mm, the bag piece is folded in half in the width direction, and the bag piece is sewn by using sewing threads. As the ultraviolet aging resistant master batch is added into the sewing thread, the anti-aging effect can reach that the fracture strength retention rate is more than or equal to 90 percent after the anti-aging effect is detected by ASTM D4355 standard for 500 hours.

Through test tests, the ecological bag disclosed by the invention has the advantages of high strength, good tear resistance, capability of bearing strong soil loading pressure and capability of ensuring stable structure. The ecological bag disclosed by the invention also has good water permeability and ultraviolet resistance.

The invention also discloses application of the ecological bag in preparation of a dune slope greening product.

Preferably, the soil improvement fiber comprises, in parts by weight:

wherein the wood fiber is obtained by sterilizing and recycling heat treated wood fiber, is a recyclable plant fiber substance, and is obtained by steaming and extracting mixture of wood or paper at high temperature and heating at 200 deg.C. The wood fiber after heat treatment is lighter and thinner, can cover a larger area in unit weight, has more excellent water retention and bonding performance, and eliminates weed seeds and pathogens through aseptic treatment. The wood fiber has a large number of irregular gaps, has super-strong hydrophilic performance, is high in moisture absorption speed, is not easy to harden after being dried, and provides an ideal growing environment for rapid germination and seedling strengthening of seeds, so that the wood fiber can provide organic matters for soil and improve the water retention capacity.

The biochar is prepared by high-temperature decomposition of wood, has a high-porosity particle structure, has a pore diameter of 0.1809 mu m, is easy to gather nutrient substances and beneficial microorganisms, can improve the water and fertilizer holding capacity of soil, increase the cation exchange capacity, and provide a moving place for soil probiotic microorganisms, so that the soil becomes fertile and is beneficial to plant growth.

The humus is the main part of soil organic matters, is a black amorphous organic colloid, contains elements required by plant growth and development, and can improve soil and increase fertility. The humus can be slowly decomposed in soil under certain conditions, and nutrients mainly comprising nitrogen and sulfur are released to be absorbed by plants.

The mushroom dregs are prepared by crushing and fermenting mushroom production leftovers, contain a large amount of nutrients such as protein, amino acid, mycoprotein, Ca, Zn, Mg and the like, and are easily absorbed and utilized by plants through fermentation.

The polysaccharide is a cross-linked polysaccharide that provides water retention capability while also increasing the viscosity and cohesive strength of the matrix to prevent washout.

The seaweed essence contains alginic acid as main ingredient, and also contains plant essential elements, plant growth hormone (auxin, cytokinin, gibberellin), vitamins, humic acid, plant stress-resistant factor, etc. The seaweed extract can promote seed germination, improve germination rate and facilitate plant growth. The algae essence is favorable for cultivating whole seedlings and strong seedlings, can promote the growth of plant root systems, and is favorable for plants to absorb water and nutrients.

The carboxymethyl chitosan is a water-soluble chitosan derivative and is prepared by reacting chitosan with chloroacetic acid under an alkaline condition. The carboxymethyl chitosan contains almost all substances such as amino acid, nitrogen, phosphorus, potassium and the like required in the growth process of plants, can promote the plants to absorb nutrients, increases the resistance of the plants, and also has the functions of antibacterial capacity and soil improvement. The carboxymethyl chitosan has good stability and degradability, and the degradation product of the carboxymethyl chitosan can be absorbed by crops as a high-quality organic fertilizer, can effectively improve the granular structure of soil and has a certain soil moisture preservation effect.

The biochemical potassium fulvate is a pure natural fermentation product, is rich in almost all substances such as amino acid, nitrogen, phosphorus, potassium, saccharides and various enzymes required in the growth process of plants, has a growth promoting factor with a high biological activity function, improves the absorption and operation of trace elements of the plants, has certain cold-resistant and drought-resistant effects, can promote the growth of the root systems of the plants and improve the activity of the root systems, and is beneficial to the absorption of water and nutrient elements by the plants.

The diatomite is a siliceous rock, has a special porous structure and a larger specific surface area, has strong adsorption performance and light volume weight, can play the roles of moisturizing, loosening soil and improving soil in the soil, promotes the growth effect of crops and has the role of improving the soil.

The shell powder mainly contains calcium carbonate, a small amount of amino acid, polysaccharide substances and a small amount of chitin, and also contains certain trace elements (copper, magnesium, potassium, molybdenum, phosphorus, manganese, iron and zinc), can provide various nutrient elements for plant growth, and has antibacterial and bacteriostatic effects.

The trichoderma can decompose organic matters such as cellulose and the like in the growth and propagation process to generate substances such as amino acid, polysaccharide and the like, can promote the growth and development of plants, can increase the resistance of the plants, effectively controls soil-borne fungal diseases, and is widely used for biological control and biological fertilizer.

The azotobacter can automatically propagate and fix free nitrogen in the air in the soil. Azotobacter carbon sources are wide and include glucose, fructose, sucrose, acetic acid, nitrate, ammonia, amino acids, fumaric acid, gluconic acid and ethanol. The nitrogen-fixing bacteria can be used as beneficial nitrogen-fixing bacteria, can fix nitrogen in the air in the soil and in the rhizosphere of various plants, provide nitrogen nutrition for the plants, and can secrete hormone to stimulate the growth of the plants.

The composite bacillus comprises bacillus subtilis, bacillus licheniformis and bacillus laterosporus, and can generate substances which are beneficial to absorption and utilization of plants, such as organic acid, amino acid, polysaccharide, hormone and the like in the growth and propagation process. After the bacillus subtilis, the bacillus licheniformis and the bacillus laterosporus are propagated in soil, a plurality of physiological active substances such as gibberellin, indoleacetic acid and the like can be generated, so that crops can grow healthily, the cold resistance, drought resistance, disease resistance and stress resistance of the crops are enhanced, a beneficial flora is formed at the roots of the crops, and the occurrence of soil-borne diseases is effectively inhibited.

The trichoderma, azotobacter and composite bacillus decompose organic matters such as cellulose in the growth and reproduction process, generate substances such as amino acid, polysaccharide and the like, are beneficial to absorption and utilization of plants, can form beneficial flora on the roots of crops, effectively inhibit soil-borne diseases and enhance the capability of resisting germs of the plants.

The mushroom residue, humus, shell powder and other components can further improve the chemical property of soil, increase the soil activity and promote plant establishment.

Preferably, the usage amount of the soil improvement fiber is determined by the organic matter content of a sand dune slope, and the relationship between the organic matter content of the sand dune slope and the usage amount of the soil improvement fiber is as follows;

organic matter content of Sand dune slope (%)	Soil improvement fiberThe amount of vitamin used (g/m)²)
		0～0.75	500～560；
0.75～1.5	450～500；
		1.5～2.0	400～450；
2.0～5.0	≤400。

Further, the water in the soil improving fiber composition is preferably used in an amount to dissolve the soil improving fiber and the fertilizer.

Further, the fertilizer in the soil improvement fiber mixture is a slow release fertilizer.

Preferably, the erosion resistant fiber comprises the following components in parts by weight:

wood fiber	65-90 parts by weight;
		water-retaining agent	2-5 parts by weight;
artificial interlocking fibers	10-20 parts by weight;
		high molecular polymer	5-10 parts by weight;
particulate microporous substrate	5-10 parts by weight;
		attapulgite powder	1-3 parts by weight;
chitosan	1-3 parts by weight;
		adhesive agent	1-3 parts by weight;
kaolin clay	1-3 parts by weight;
		coloring agent	1 to 2 parts by weight.

Preferably, the wood fiber is heat-treated wood fiber, and is obtained by mixing wood or paper, steaming at high temperature, extracting, and heating at 200 deg.C. The wood fiber after heat treatment is lighter and thinner, can cover a larger area per unit weight, has more excellent water retention and bonding performance, and eliminates weed seeds and pathogens through aseptic treatment.

Preferably, the water retention agent is polyacrylamide. The invention discovers that the polyacrylamide has the effects of regulating soil moisture, improving soil and improving soil nutrients when being used on the surface of the desert. Compared with other chemical water-retaining agents, the polyacrylamide has longer service life in soil, is nontoxic and harmless, releases and absorbs water repeatedly, has high water absorbability, can provide water required by seed germination, and can regulate water environment required by plant growth in the later stage of plant growth.

Preferably, the artificial interlocking fiber is obtained by dissolving a natural degradable high molecular compound and a derivative thereof and then spinning.

Further, the natural degradable high molecular compound and the derivative thereof are specifically wood, bamboo, coconut shell, seaweed, straw and miscanthus.

The invention discovers that the artificial interlocking fiber prepared by processing wood, bamboo, coconut shell, seaweed, straw and miscanthus can increase the physical tensile strength and shorten the healing time after spraying; in addition, the artificial interlocking fiber has the characteristics of simple production process, porosity, good moisture absorption and the like.

Preferably, the high molecular polymer is polyacrylonitrile fiber, and the polyacrylonitrile fiber is a linear crystalline polymer and has a low average molecular weight. The invention discovers that the water and fertilizer holding capacity of the anti-corrosion fiber can be optimized by adding the polyacrylonitrile fiber into the anti-corrosion fiber, and the adhesion effect is improved, so that the polyacrylonitrile fiber has the characteristics of no toxicity, no pollution, difficult deformation, low strength, good weather resistance, good sun resistance and the like.

Preferably, the granular microporous base is a porous material and is prepared by mixing powder and instant sodium silicate. Wherein the instant sodium silicate is powdery instant sodium silicate; the powder material comprises water-quenched blast furnace slag of a steel plant, fly ash and sodium sulfate which are mixed; the water quenching blast furnace slag of the steel plant accounts for 70 percent of the total weight of the particle micropore base, the fly ash accounts for 15 percent of the total weight of the particle micropore base, and sodium sulfate (Na)₂SO₄) 15% by weight of the total weight of the particulate microporous base; the content of the instant sodium silicate is 1 percent of the total weight of the powder. And mixing the powder material and the instant sodium silicate, and then sieving the mixture by a 100-mesh sieve.

The particle micropore base can greatly improve the space stability of the erosion-resistant fiber and the structural strength, increase the porosity of the erosion-resistant fiber, increase the intensity of resisting rain wash and simultaneously keep more water to promote plant growth. Each particle of the particle micropore base can capture and maintain moisture and nutrition, reduce water evaporation on the surface of soil, improve oxygen exchange and enhance the vegetation cultivation effect.

Preferably, the attapulgite powder is a layered chain clay mineral, has a special fibrous structure, can enhance the cohesiveness among fibers, and has strong adsorption capacity.

Preferably, the chitosan is a natural high molecular polymer, can be biodegraded, is degraded into a high-quality organic fertilizer for plants to absorb, and has the effects of resisting bacteria and improving soil.

Preferably, the adhesive is a starch adhesive, takes corn as a raw material, can be naturally degraded, and has good stable viscosity and water-containing property.

Preferably, the kaolin is a porous material whose main component is kaolinite, is easy to disperse and suspend in water or other solution, and has strong plasticity, caking property, ion adsorption property and acid-base corrosion resistance after dispersion. The kaolin can fill the gaps among the fibers, improve the stability of the fibers and enhance the caking property of the fibers.

Preferably, the coloring agent is a food grade coloring agent.

More preferably, the coloring agent chooses for use green food level coloring agent, for environmental protection colour, can regard as effective coverage and the visual judgement index of covering thickness when spouting, reduces the risk that the construction area overlaps. The life of the coloring agent depends on ultraviolet rays, and the color fades within 3 to 7 days according to the intensity of the ultraviolet rays.

Preferably, the usage amount of the anti-erosion fibers is determined by the slope of a sand dune side slope, and the relationship between the slope of the sand dune side slope and the usage amount of the anti-erosion fibers is as follows;

slope of dune slope	Amount of anti-erosion fiber used (g/m)²)
		H/L≤1:4	≤300；
1:4＜H/L≤1:3	300～350；
		1:3＜H/L≤1:2	350～400；
1:2＜H/L≤1:1	400～450；
		H/L＞1:1	450～500；

Wherein, H is the vertical height of the slope surface, and L is the horizontal width of the slope surface.

Further, the amount of water in the erosion resistant fiber composition is preferably such that the soil improving fiber and the fertilizer are dissolved.

Further, the fertilizer in the anti-erosion fiber composition is a slow release fertilizer.

The invention also discloses a sand dune slope greening method, which comprises the following steps:

1) preparing ecobags, soil amendment fiber compositions and erosion resistant fiber compositions;

2) the ecological bag is fixedly arranged on the surface of the dune side slope through a pawl of the connecting buckle to form a primary dune side slope greening device;

3) the drain pipe is fixed in the gap between the adjacent ecological bags, so that the drain pipe is contacted with the slope surface of the sand dune side slope to form a secondary sand dune side slope greening device;

4) the mixture of the soil improvement fiber composition and the vegetation seeds is arranged on the surface of the secondary sand dune slope greening device to form a tertiary sand dune slope greening device;

5) the mixture of the erosion-resistant fiber composition and the vegetation seeds is placed on the surface of the tertiary sand dune slope greening device to form the sand dune slope greening device.

Preferably, the step 3)) further comprises the step of fixedly arranging the drain pipe at the near-edge area of the sand dune slope, wherein the opening of the drain pipe at the near-edge area of the sand dune slope is wrapped by gauze or/and the ecological bag.

The invention discloses a dune side slope greening method which comprises a dune side slope greening device, wherein the dune side slope greening device is formed by stacking ecological bags, the ecological bags are stacked mutually to form a pyramid-shaped triangular structure, and the ecological bags are connected and fixed through connecting buckles.

Furthermore, dune slope compound green device by the ecological bag piles up into multilayer ecological bag wall body along the horizontal direction, ecological bag piles up into the triangular structure of pyramid each other to it is fixed between ecological bag and ecological bag the connector link is connected fixedly, so that two ecological bags that adjoin realize with the layer and the connection on adjacent layer, form stable regular triangle and consolidate the tight lock structure, strengthened ecological bag's tensile strength.

Further, the mixture of the soil improvement fiber composition and the vegetation seeds and the mixture of the anti-erosion fiber composition and the vegetation seeds are sprayed onto the wall of the ecological bag in sequence by using a hydraulic spray method. The soil improvement fiber composition and the anti-erosion fiber composition can well protect seeds, are in close contact with the wall body of the ecological bag, can resist wind and rain wash, and have the advantages of high speed, high lawn forming density, uniform seeding and high efficiency compared with the conventional seeding and lawn forming. While sowing, the fertilizer and the water retention agent can be added together and mixed with water uniformly, and the construction process is simple and convenient.

Further, the sand dune slope greening method specifically comprises the following steps:

a) and (6) slope surface treatment. The machine tool and the manpower are adopted to clean the sundries on the surface of the side slope, and the sand surface with a larger gradient is mechanically arranged, so that the gradient is gentle, and the gradient is preferably smaller than 40 degrees.

b) Before building the ecological bag at the bottom of the dune slope, a soil layer of 6-8 cm needs to be dug under the ground level, the ecological bag is filled with specially mixed planting soil (wherein the planting soil comprises planting soil and mushroom fertilizer, the planting soil is 95% of the planting soil by weight percentage and 5% of the mushroom fertilizer by weight percentage), the mixture is uniformly mixed by a machine, and the ecological bag is filled and sealed by a high-ultraviolet-resistant binding belt.

c) The ecological bags are longitudinally arranged at the bottom of the sand dune side slope, tamped and flattened, and then horizontally stacked (wherein, one layer of ecological bag is vertically stacked after 3-4 layers of ecological bags are horizontally stacked), the ecological bags on the upper layer are stacked on the ecological bags on the lower layer in a staggered mode, connecting buckles are fixed between the ecological bags on the adjacent layers, and the ecological bags on the same layer are connected with the ecological bags on the upper layer and the ecological bags on the lower layer through the connecting buckles; the adjacent ecological bags on the same layer are mutually fixed and installed through the connecting buckles.

d) The ecological bag is filled with planting soil and compacted with the gap of sand dune side slope, and sets up drain pipe 3 every 5 ~ 6 layers of ecological bag staggered floor, and the gauze or/and ecological bag parcel are used to gauze to the opening of the regional drain pipe 3 in near edge of sand dune side slope, and the gauze end sets up the rubble for the position of the regional drain pipe 3 in near edge of fixed sand dune side slope.

e) The ecological bags are watered and settled every 2 meters to prevent collapse or displacement caused by overlarge rainwater, so that a building structure of the ecological bags is formed.

f) A spray-seeded soil amendment fiber composition and an erosion resistant fiber composition.

f-1) spraying and sowing a mixture of the soil improvement fiber composition and the vegetation seeds on the ecological bag building structure formed by the step e), wherein the fertilizer of the soil improvement fiber composition is a slow release fertilizer, the using amount of the fertilizer is adjusted according to the local organic matter content, and the using amount of the water of the soil improvement fiber composition is that the anti-erosion fiber and the fertilizer are dissolved to be in a slurry state:

f-2) spraying the mixture of the anti-erosion fiber composition and the vegetation seeds on the surface of the mixture of the soil improvement fiber composition and the vegetation seeds, wherein the fertilizer of the anti-erosion fiber composition is a slow release fertilizer, the dosage of the fertilizer is adjusted according to the local organic matter content, and the dosage of the water of the anti-erosion fiber composition is preferably used for dissolving the anti-erosion fiber and the fertilizer into a slurry state.

Furthermore, the ecological bag wall body, namely a plurality of layers of ecological bags, is stacked into a pyramid-shaped triangular structure.

Further, the ecological bag wall body is formed by stacking the ecological bags in a horizontal direction to form a plurality of layers.

Further, the ecological bags at the bottom of the ecological bag wall body are built longitudinally, when 3-4 layers of ecological bags are built transversely, one layer of ecological bags are built longitudinally, the ecological bags are staggered longitudinally and transversely, connection among the ecological bags is further reinforced, and the ecological bags are filled with specially-mixed planting soil (the planting soil comprises planting soil and mushroom fertilizer, the planting soil is 95% of planting soil by weight and 5% of mushroom fertilizer by weight).

Furthermore, the ecological bags are longitudinally built at the bottom of the ecological bag wall body so as to stabilize the whole ecological bag wall body.

Furthermore, the ecological bag and the sand dune side slope gap are filled with compacted planting soil.

Furthermore, the drain pipes are arranged at intervals of 5 layers of ecological bags, the distance between every two adjacent layers of drain pipes is 5 meters, the drain pipes are convenient for discharging excessive moisture in the ecological wall body, the dead weight of the ecological wall body is reduced, and the risk of landslide caused by overweight of the wall body is reduced.

Furthermore, the ecological bag wall built by the ecological bags filled with the plant-growing soil provides enough nutrient components for the growth of plants on the sand dune slope and keeps certain water storage capacity.

Further, the dune slope re-greening device will borrow from the stable triangular structure principle of mechanics the ecological bag piles up, is aided with subassembly such as standard connector link, forms the novel software side slope protection system that permeates water, does not pass through soil, is friendly to the plant.

The mixture of the spray-seeding soil improvement fiber composition and the vegetation seeds can provide nutrients for the bottom layer of the sand dune slope greening device, the mixture of the spray-seeding erosion-resistant fiber composition and the vegetation seeds can prevent the vegetation seeds of the sand dune slope greening device from running off, and has the capability of resisting rain wash, the spray-seeding efficiency is guaranteed by a hydraulic spray-seeding method, and when seeding is carried out, the fertilizer, the water-retaining agent, watering and the like are successful once, so that time and labor are saved.

Further, the ecological bag can also use other reinforcing methods, including: stacking reinforcement method, long bag anchoring method.

In summary, the present invention discloses a sand dune slope greening device, including: an ecological bag, a connector link with a pawl, a drain pipe, a soil improvement fiber composition, a vegetation seed and an anti-erosion fiber composition; after the ecological bags are laid on the surface of the sand dune slope, the ecological bags are fixedly connected with each other through the connecting buckles, the drain pipe is fixed in the gap of the adjacent ecological bags, and then the mixture of the soil improvement fiber composition and the vegetation seeds and the mixture of the vegetation seeds and the anti-erosion fiber composition are sprayed and sown in sequence. The ecological bag used by the device is prepared from a novel soft environment-friendly material, the ecological bag has high structural strength and good tear resistance, can bear strong soil loading pressure, has good water permeability, has a breaking strength retention rate of more than 90 percent, provides a good supporting effect for the sand dune side slope, can cover a layer of soil with nutrient activity on the surface of the sand dune side slope by the mixture containing soil improvement fibers and the mixture containing anti-erosion fibers sprayed in sequence, prepares a terrace bed for plant growth, solves the problems of poor nutrient of sand and soil and poor water storage and retention capacity, and realizes ecological greening of the sand dune side slope; the drain pipe is convenient for the drainage, alleviates the rainwater and to the intensity of washout of sand dune. Therefore, compared with the prior art, the sand dune slope greening device disclosed by the invention has the following advantages: the ecological bag is adopted to replace the traditional cement concrete hard building material and the grid material for preventing wind and fixing sand, on one hand, the ecological bag realizes the sand dune structure supporting effect, and on the other hand, the ecological bag has excellent physical performance, high strength, small deformation, hydrophilicity and air permeability; good water permeability and ultraviolet resistance. Ecological bag can permeate water in the twinkling of an eye, realizes the virtuous circle of moisture, does benefit to vegetation, just the drainage can also effectively be solved to ecological bag, does benefit to stable in structure, fuses as an organic whole with the side slope, forms permanent ecological barricade. The invention discloses a dune side slope re-greening method, which provides soil and nutrient substances required by growth of plants on the dune side slope so as to achieve the purposes of restoring natural environment, protecting ecological balance and beautifying environment.

Furthermore, the ecological bag disclosed by the invention can be used in the fields of slope protection greening, river and lake bank protection, mine greening, ecological flood control, three-dimensional greening and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a sand dune slope greening apparatus provided by the present invention;

FIG. 2 is a schematic structural view of an ecological bag provided by the present invention;

FIG. 3 is a schematic plan view of a sand dune slope greening apparatus according to the present invention;

FIG. 4 is a schematic diagram of the front and back sides of a connecting buckle of a sand dune slope greening device provided by the invention;

fig. 5 is a schematic view of the installation of an ecological bag connecting buckle of the sand dune slope greening device provided by the invention.

Wherein the figures are labeled as follows:

1. an ecological bag; 1-1. bag body; 1-2, connecting a buckle; 3. a drain pipe; 4. a pawl.

Detailed Description

The invention discloses a sand dune side slope greening device. Those skilled in the art can modify the process parameters appropriately to achieve the desired results with reference to the disclosure herein. It is expressly intended that all such similar substitutes and modifications which would be obvious to one skilled in the art are deemed to be included in the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.

The invention is further illustrated below with reference to the examples and the accompanying figures 1 to 5.

Materials used in the examples of the present invention: the anti-aging polypropylene master batch is purchased from Coleman plastics Limited company of Foshan city, and other materials are self-made or sold in the market. Wherein, company A is pyramid Green technologies, Inc.; company B is Chongqing Hua Xianzi environmental protection engineering Co.

Example 1

Referring to fig. 1 to 3, embodiment 1 provides a sand dune slope greening device, including: the ecological bag comprises an ecological bag 1, connecting buckles 1-2 with pawls 4, a drain pipe 3, a soil improvement fiber composition, vegetation seeds and an anti-erosion fiber composition; the ecological bag 1 (comprising a bag body 1-1) is fixedly arranged on the surface of a dune slope through a pawl 4 of a connecting buckle 1-2 to form a primary dune slope greening device; the drain pipe 3 is fixed in the gap between the adjacent ecological bags 1, so that the drain pipe 3 is in contact with the slope surface of the sand dune side slope to form a secondary sand dune side slope greening device; the mixture of the soil improvement fiber composition and the vegetation seeds is arranged on the surface of the secondary sand dune slope greening device to form a tertiary sand dune slope greening device; placing the mixture of the erosion-resistant fiber composition and the vegetation seeds on the surface of a three-level dune slope greening device to form a dune slope greening device; wherein the soil improving fiber composition comprises water, fertilizer and soil improving fiber; the soil improvement fiber comprises: wood fiber, biochar, humus, mushroom residue, polysaccharide, seaweed extract, carboxymethyl chitosan, biochemical potassium fulvate, diatomite, shell powder, trichoderma, azotobacter and composite bacillus; the erosion resistant fiber composition comprises water, fertilizer and erosion resistant fibers; the erosion resistant fiber includes: wood fiber, water-retaining agent, artificial interlocking fiber, high molecular polymer, particle micropore base, attapulgite powder, chitosan, adhesive, kaolin and coloring agent.

Example 2

Referring to fig. 1 to 3, the present embodiment 2 provides a sand dune slope greening device, including: the ecological bag comprises an ecological bag 1, connecting buckles 1-2 with pawls 4, a drain pipe 3, a soil improvement fiber composition, vegetation seeds and an anti-erosion fiber composition; the ecological bag 1 (comprising a bag body 1-1) is fixedly arranged on the surface of a dune slope through a pawl of a connecting buckle 1-2 to form a primary dune slope greening device; the drain pipe 3 is fixed in the gap between the adjacent ecological bags 1, so that the drain pipe 3 is in contact with the slope surface of the sand dune side slope to form a secondary sand dune side slope greening device; the mixture of the soil improvement fiber composition and the vegetation seeds is arranged on the surface of the secondary sand dune slope greening device to form a tertiary sand dune slope greening device; placing the mixture of the erosion-resistant fiber composition and the vegetation seeds on the surface of a three-level dune slope greening device to form a dune slope greening device; wherein the soil improving fiber composition comprises water, fertilizer and soil improving fiber; the soil improvement fiber comprises: wood fiber, biochar, humus, mushroom residue, polysaccharide, seaweed extract, carboxymethyl chitosan, biochemical potassium fulvate, diatomite, shell powder, trichoderma, azotobacter and composite bacillus; the erosion resistant fiber composition comprises water, fertilizer and erosion resistant fibers; the erosion resistant fiber includes: wood fiber, water-retaining agent, artificial interlocking fiber, high molecular polymer, particle micropore base, attapulgite powder, chitosan, adhesive, kaolin and coloring agent.

Further, the preparation method of the ecological bag 1 comprises the following steps:

3) and (3) carrying out opening, carding, lapping, needling, heat setting and winding processes on the anti-aging polypropylene short fibers to produce the anti-aging ecological bag 1.

Further, the preparation method of the anti-aging polypropylene master batch comprises the following steps: mixing polypropylene master batch, antioxidant and light stabilizer, heating and melting, extruding through a spinneret plate, cooling, cutting into granules to obtain the anti-aging polypropylene master batch

Further, the polypropylene fiber colloidal particles and the anti-aging polypropylene master batch comprise the following components in parts by weight:

95-97 parts of polypropylene rubber particles;

3-5 parts of anti-aging polypropylene master batch.

Further, the soil improving fiber of example 2 comprises, in parts by weight:

furthermore, the usage amount of the soil improvement fiber is determined by the organic matter content of the sand dune side slope, and the relationship between the organic matter content of the sand dune side slope and the usage amount of the soil improvement fiber is as follows;

organic matter content of Sand dune slope (%)	Amount of soil improving fiber used (g/m2)
		0～0.75	500～560；
0.75～1.5	450～500；
		1.5～2.0	400～450；
2.0～5.0	≤400。

Further, the erosion resistant fiber of example 2 comprises, in parts by weight:

Furthermore, the usage amount of the anti-erosion fiber is determined by the slope of the sand dune slope, and the relationship between the slope of the sand dune slope and the usage amount of the anti-erosion fiber is as follows;

Furthermore, the vegetation seeds are cold-resistant, drought-resistant, barren-resistant and suitable for local climatic environment and geographical position

Further, the pawls of the connecting buckle 1-2 include front pawls and rear pawls.

Example 3

The embodiment 3 discloses a sand dune slope greening method, which comprises the following steps:

1) preparing the ecobag 1, the soil improvement fiber composition and the erosion resistant fiber composition;

2) the ecological bags 1 are fixedly arranged on the surface of a dune side slope through the pawls 4 of the connecting buckles 1-2 to form a primary dune side slope greening device, wherein the ecological bags 1 of adjacent layers are fixedly connected with each other through the pawls 4 of the connecting buckles 1-2;

3) the drain pipe 3 is fixed in the gap between the adjacent ecological bags 1, so that the drain pipe 3 is contacted with the slope surface of the sand dune side slope to form a secondary sand dune side slope greening device;

4) a mixture of the soil improvement fiber composition and the vegetation seeds is arranged on the surface of the secondary sand dune slope greening device to form a tertiary sand dune slope greening device;

wherein the composition of the soil amendment fiber of example 3 is as follows:

5) a mixture of the erosion-resistant fiber composition and the vegetation seeds is placed on the surface of a tertiary dune slope greening device to form the dune slope greening device.

Wherein the composition of the erosion resistant fiber of example 3 is as follows:

wood fiber	90 portions of
		Water-retaining agent	5 portions of
Artificial interlocking fibers	20 portions of
		High molecular polymer	10 portions of
Particulate microporous substrate	10 portions of
		Attapulgite powder	3 portions of
Chitosan	3 portions of
		Adhesive agent	3 portions of
Kaolin clay	3 portions of
		Coloring agent	2 portions of

Example 4

Referring to fig. 2, in this embodiment 4, the preparation method of the ecological bag 1 of the sand hill slope greening apparatus includes:

s101: mixing 97 parts by weight of polypropylene colloidal particles with 3 parts by weight of anti-aging polypropylene master batch to obtain a mixture;

s102: and melting and extruding the mixture of S101 to obtain a molten mass, extruding the molten mass into filaments, oiling, drafting, curling, cutting, drying and shaping to obtain the anti-aging polypropylene short fiber.

S103: and (3) carrying out opening, carding, lapping, needling, heat setting and winding on the anti-aging polypropylene short fibers to produce the anti-aging ecological geotextile.

S104: further, the ecological geotextile is cut, cut and sewn to obtain the ecological bag 1.

Cutting the ecological bag 1 into: and the bag piece with the length of 830mm and the width of 900mm is folded in half in the width direction, and the ecological bag 1 with the length of 810mm and the width of 430mm is manufactured by using environment-friendly and added ultraviolet aging resistant master batch sewing threads through sewing.

Referring to fig. 4 and 5, the ecological bag 1 of the present invention is fixedly installed on the surface of a dune slope by means of the pawls of the connecting buckles 1-2, which are specifically: the front and the back of the connecting buckle 1-2 are provided with front pawls and back pawls, the front of the connecting buckle 1-2 is provided with 6 front pawls 5, and the back is provided with 8 back pawls 5. The ecological bags of adjacent layers are fixedly connected by adopting the front side pawls and the back side pawls of the connecting buckles 1-2, namely the back side pawls of the ecological bag 1 of the upper layer are fixed on the bag body 1-1 of the ecological bag 1 of the lower layer; the front pawl of the ecological bag 1 at the lower layer is fixed on the bag body 1-1 of the ecological bag 1 at the upper layer, so that the ecological bags 1 at the adjacent layers can be fixedly connected; the adjacent ecological bags 1 are also fixedly connected with each other through pawls of the connecting buckles 1-2, so that the ecological bags 1 on the same layer are fixedly connected, and the ecological bags 1 on the adjacent layers are fixedly connected.

Example 5

This example 5 is a test of the physical properties of the ecological bag material for the ecological bag prepared in example 4, and the method comprises the following steps:

test materials: the test group was 160 grams of the ecobag of example 4, with an area of 2 square meters; the control group 1 is a commercial A company non-woven fabric, 160 g and black green ecological fabric, and the area is 2 square meters; control 2 was a commercial ecobag from company B, 160 g, 2 m square.

The ecological bag is subjected to a physical property test, and the specific steps are as follows:

1. the test group, the control group 1 and the control group 2 were first placed between samples at a temperature of 25. + -. 5 ℃ and a humidity of 65. + -. 5% for 24 hours to be equilibrated (the equilibration was carried out so that the test group, the control group 1 and the control group 2 were sufficiently subjected to the same temperature and humidity treatment).

2. 10 samples were each cut out of the test, control 1 and control 2 groups.

3. The breaking strength is tested according to the GB/T15788 standard, the bursting strength is tested according to the GB/T14800 standard, the tearing strength is tested according to the GB/T13763 standard, the anti-aging test is tested according to the ASTM D4355 standard, samples obtained by cutting a test group, a control group 1 and a control group 2 are respectively tested, test data are recorded, and test results are shown in Table 1.

TABLE 1

Table 1 shows: the ecological bag prepared in the embodiment 4 has high structural strength and good tear resistance, can bear strong soil loading pressure, and ensures stable structure.

Example 6

This example 6 is a water flow rate test of the ecological bag material on the ecological bag prepared in example 4, and the specific steps are as follows:

test materials: the test group was 160 grams of the ecobag of example 4, with an area of 2 square meters; control 1 was a commercial nonwoven fabric from company A, 160 g, having an area of 2 square meters.

The ecological bags of the test group and the control group 1 are subjected to a water permeability test, and the method comprises the following specific steps:

1. the test group and the control group 1 were first placed between the samples at a temperature of 25. + -. 5 ℃ and a humidity of 65. + -. 5% and equilibrated for 24 hours (equilibration means that the test group and the control group 1 were sufficiently subjected to the same temperature and humidity treatment).

2. 10 samples each having a diameter of 100mm were cut out from each of the test group and the control group 1.

3. The samples of the test group and the control group 1 were soaked in water for 12 hours to allow the samples to sufficiently absorb water and remove air bubbles.

3. According to the test method GB/T15789, samples of the test group and the control group 1 after soaking are respectively tested, and the water passing area of the samples is 20cm²。

4. Test data were recorded and plotted on standard paper for differential pressure and water flow rate, with the test results shown in table 2.

TABLE 2

Sample (I)	Gram weight (g/m2)	Thickness (mm)	Flow Rate (mm/s)	Permeability K (s-1)
					Test group	160	1.3	≥90	≥1.80
Control group	130	1.2	≥90	≥1.60

From the results of table 2, it can be seen that: the permeability K of the test group was greater than that of the control group 1, the flow rate of water flowing through the ecological bag prepared in example 4 was 90 mm/sec or more, and the permeability of the test group was higher and the thickness was greater than that of the control group. The ecological bag prepared in example 4 has good water permeability.

Example 7

This example 7 is a uv resistance test of the ecological bag material prepared in example 4, and the specific steps are as follows:

test materials: the test group was 160 grams of the ecobag of example 1, with an area of 2 square meters; the control group 1 is a commercial ecological bag of company A, 160 g and the area is 2 square meters; control 2 was a commercial ecobag from company B, 160 g, 2 m square.

The ecological bag is subjected to an ultraviolet resistance test, and the method comprises the following specific steps:

1. cutting 10 samples of the test group, the comparison group 1 and the comparison group 2 according to the requirement of a test method ASTM D4355, randomly dividing the 10 samples of each group of the test group, the comparison group 1 and the comparison group 2 into two groups, and testing the breaking strength and the breaking elongation of the samples according to the test method ASTM D5035 to obtain the breaking strength data before test.

2. The sample was held in a sample holder and placed on a tray rack of an aging resistance tester Q-Sun Xe-3-H.

3. Setting irradiance of 0.35W/m²And selecting a spray-irradiation cycle, setting the illumination time to be 90 minutes, setting the illumination and spray time to be 30 minutes, and continuously circulating until 500 hours.

4. And rotating the sample on the tray once clockwise every 50 hours to ensure that the sample is uniformly irradiated and sprayed.

5. After 500 hours of the test, the test was stopped and the sample was taken out and subjected to a breaking strength test according to ASTM D5035 to obtain breaking strength data after the test.

6. The strength retention was calculated and the breaking strength after the test was divided by the breaking strength before the test, and the test results are shown in table 3.

TABLE 3

Sample (I)	Gram weight (g/m2)	500-hour Strength Retention (%)
			Test group	160	90
Control group 1	160	70
			Control group 2	160	62

The data in table 3 illustrates: the retention rate of breaking strength of the ecological bag prepared in the embodiment 4 after accelerated aging test reaches over 90 percent, which is far beyond 70 percent of the conventional aging requirement, and the ecological bag prepared in the embodiment 4 can meet the outdoor engineering application.

Example 8

This embodiment 8 is a method for restoring green color of a sand hill slope, which specifically operates as follows:

referring to fig. 1 and fig. 3, the method for restoring green of a sand dune slope specifically operates as follows:

the slope surface of the sand dune is processed by adopting machines and tools or a manual method, the slope of the sand dune is relatively gentle, and the slope is preferably less than 40 degrees.

1. Mixing 95 parts by weight of polypropylene colloidal particles and 5 parts by weight of anti-aging polypropylene master batch to obtain a mixture;

2. extruding the mixture obtained in the step 1 into filaments after melt extrusion, then obtaining a product through oiling, drafting, curling, cutting off and drying and shaping, extruding the product into filaments, and obtaining the anti-aging ecological bag through the working procedures of opening, carding, lapping, needling, heat shaping and winding;

3. fixedly installing the ecological bags in the step 2 on the surface of the sand dune side slope through the pawls of the connecting buckles 1-2 to form a primary sand dune side slope greening device, wherein the ecological bags of adjacent layers are fixedly connected with each other through the pawls of the connecting buckles 1-2, and the ecological bags of adjacent layers are also fixedly connected with each other through the pawls of the connecting buckles 1-2, so that the ecological bags of the same layer are fixedly connected, and the ecological bags of the adjacent layers are fixedly connected;

4. the drain pipe 3 is fixed in the gap between the adjacent ecological bags, so that the drain pipe 3 is in contact with the slope surface of the sand dune side slope to form a secondary sand dune side slope greening device;

5. the mixture of the soil improvement fiber composition and the vegetation seeds is arranged on the surface of the secondary sand dune slope greening device to form a tertiary sand dune slope greening device; wherein the fertilizer of the soil improvement fiber composition is a slow release fertilizer, the amount of the fertilizer is adjusted according to the local organic matter content, and the amount of the water of the soil improvement fiber composition is preferably that the anti-erosion fiber and the fertilizer are dissolved to be in a slurry state.

Furthermore, the using amount of the soil improvement fiber is 400g/m²The concrete components comprise:

6. and placing the mixture of the erosion-resistant fiber composition and the vegetation seeds on the surface of the three-level dune slope greening device to form the dune slope greening device. Wherein the fertilizer of the anti-erosion fiber composition is a slow-release fertilizer, the amount of the fertilizer is adjusted according to the local organic matter content, and the amount of the water of the anti-erosion fiber composition is preferably used for dissolving the anti-erosion fiber and the fertilizer into a slurry state.

Furthermore, the dosage of the anti-erosion fiber is 500g/m²The concrete components comprise:

wood fiber	65 portions of
		Water-retaining agent	2 portions of
Artificial interlocking fibers	10 portions of
		High molecular polymer	5 portions of
Particulate microporous substrate	5 portions of
		Attapulgite powder	1 part of
Chitosan	1 part of
		Adhesive agent	1 part of
Kaolin clay	1 part of
		Coloring agent	1 part of

Further, step 3 is preceded by: before the bottom of the sand dune slope is built by using the ecological bags, a 6cm soil layer needs to be dug under the ground level, the ecological bags 1 filled with the plant-growing soil are longitudinally arranged, and the ecological bags are tamped and flattened.

Further, in the step 3, the ecological bags are fixedly arranged on the surface of a sand dune slope through pawls of the connecting buckles 1-2, specifically, a plurality of layers of ecological bags 1 are transversely built to construct an ecological bag wall, and mechanical tamping and flattening are also adopted, so that the bag bodies of the ecological bags 1 are tightly combined. The upper ecological bags are stacked on the lower ecological bags in a staggered mode, and the connecting buckles 1-2 for fixing the ecological bags are arranged between every two ecological bags to form a stable triangular structure (one ecological bag on the upper layer and the two ecological bags on the lower layer form a triangular structure), so that the two adjacent ecological bags are connected with each other at the same layer and an adjacent layer.

Further, step 4's drain pipe 3 is fixed adjacent ecological bag 1's clearance specifically is that 5 layers of ecological bags of every set up drain pipe 3, and sand dune side slope's nearly marginal zone's drain pipe 3 opening is with gauze or/and ecological bag parcel, avoids sand dune side slope's nearly marginal zone's drain pipe to be blockked up by sand and stone, and every layer of drain pipe 3 interval 5 meters set up, and upper and lower layer drain pipe 3 staggers the setting.

Further, step 3 further comprises: and compacting and filling the gaps between the ecological bag wall and the sand dune side slopes with planting soil.

Further, step 3 further comprises: the ecological bag wall bodies are laid for 2 meters each time for watering and sedimentation, and collapse or displacement of the ecological bag wall bodies is prevented.

Further, the step 5 and the step 6 are specifically: after the mixture of the vegetation seeds and the soil improvement fiber composition is sprayed on the secondary sand dune slope greening device by adopting a hydraulic spraying method, the mixture of the vegetation seeds and the soil improvement fiber composition is sprayed on the surface of the mixture of the vegetation seeds and the soil improvement fiber composition, the soil improvement fiber at the bottom layer can provide nutrients for the greening of the sand dune slope, the erosion resistant fiber at the surface layer can prevent the seeds from losing and has the capability of resisting rain wash, the spraying efficiency is ensured by adopting the hydraulic spraying method, and when the seeds are sowed, the fertilizer, the water retention agent, the watering and the like are successful once, time and labor are saved.

Example 9

This example 9 is a sand hill slope greening method test performed on a bailing village sand dune in milin county, and the specific operations are as follows:

the ecological environment condition before the application of the sand dune slope re-greening method is as follows: the dragon elephant trunk in the Milin county is at the slope village with the average altitude of 3700 m and the annual precipitation amount of 641mm, the soil belongs to sandy soil, the sunlight is sufficient, and the evaporation amount is large. The slope of the sand dune is about 35 degrees, the slope height is about 5 meters, and the slope surface is almost not covered by plants.

The sand dune slope greening method test specifically operates as follows:

1. and (6) slope surface treatment. The machine tool and the manpower are adopted to clean the sundries on the surface of the side slope, and the sand surface with a larger gradient is mechanically arranged, so that the gradient is gentle.

2. The ecological bag is filled with specially mixed planting soil (wherein, the planting soil comprises planting soil and mushroom fertilizer, the planting soil is 95% by weight of the planting soil and 5% by weight of the mushroom fertilizer), the mixture is uniformly mixed by a machine, and the ecological bag is filled and sealed by a highly uvioresistant binding belt.

3. And (6) building the ecological bags.

3.1 digging 6-8 cm below the ground before laying the ecological bags at the bottom layer, longitudinally arranging the ecological bags, tamping, flattening, and transversely laying the ecological bags (wherein, one layer of ecological bag is longitudinally laid after 3-4 layers of ecological bags are transversely laid).

3.2 the upper ecological bags are stacked on the lower ecological bags in a staggered mode, connecting buckles 1-2 are fixedly connected between the ecological bags of adjacent layers, and the ecological bags of the same layer are connected with the ecological bags of the upper layer and the lower ecological bags through the connecting buckles 1-2.

3.3 the ecological bag is with the planting soil packing compaction in the gap of sand dune side slope, and sets up drain pipe 3 every 5 ~ 6 layers of ecological bag staggered floor, and the gauze of the nearly marginal zone's of sand dune side slope drain pipe 3 opening is with gauze or/and ecological bag parcel, and the gauze end sets up the rubble for the position of the nearly marginal zone's of fixed sand dune side slope drain pipe 3.

3.4 the ecological bag is laid for 2 meters each time for watering and settling so as to prevent collapse or displacement caused by overlarge rainwater, and finally the ecological bag laying structure shown in the figure 3 is formed.

Furthermore, the particle size of the crushed stone in 3.3 is 5-8 cm.

4. Spray-planted soil-improving fiber composition and erosion-resistant fiber composition

4.1, spraying and sowing a mixture of the soil improvement fiber composition and the vegetation seeds on the ecological bag building structure formed in the step 3.4, wherein the fertilizer of the soil improvement fiber composition is a slow-release fertilizer, the using amount of the fertilizer is adjusted according to the organic matter content of local sandy soil, and the using amount of the soil improvement fiber composition water is suitable for dissolving the anti-erosion fiber and the fertilizer into a slurry state; the usage amount of the soil improvement fiber is 500g/m²The concrete components comprise:

wood fiber	55 portions of
		Biochar	16 portions of
Humus	27 portions of
		Mushroom residue	17 portions of
Polysaccharide	4 portions of
		Seaweed extract	2 portions of
Carboxymethyl chitosan	1.5 parts of
		Biochemical potassium fulvate	1.5 parts of
Diatomite	1.5 parts of
		Shell powder	4 portions of
Trichoderma sp	0.003 part of
		Azotobacteria	0.003 part of
Composite bacillus	0.003 part of

4.2 mixture of anti-erosion fiber composition and Vegetation seedSpraying the mixture on the surface of the mixture of the soil improvement fiber composition and the vegetation seeds, wherein the fertilizer of the anti-erosion fiber composition is a slow-release fertilizer, the dosage of the fertilizer is adjusted according to the organic matter content of the local sandy soil, the dosage of the water of the anti-erosion fiber composition is preferably used for dissolving the anti-erosion fiber and the fertilizer into a slurry state, and the dosage of the anti-erosion fiber is 400g/m²The concrete components comprise:

wherein the vegetation seeds comprise 34g/m²(Artemisia desertorum L. 3 g/m)²6g/m of amorpha fruticosa²8g/m of sophora moorcroftiana²Ryegrass 5g/m²5g/m of tall fescue²Alfalfa 6g/m²1g/m of Persiella²) 4.1 total weight of vegetation seed in which the amount of vegetation seed used for the anti-erosion fiber composition and the vegetation seed is 1/2 (total weight of vegetation seed is 34 g/m)²) (ii) a 4.2 Total weight of vegetation seed in which the amount of the anti-erosion fiber composition and the vegetation seed is 1/2 (Total weight of vegetation seed is 34 g/m)²)。

After the sand dune slope greening method is used for greening, the implementation effect is as follows:

1. most of the herbaceous plant seeds germinate in 4-5 days after spray sowing, and the amorpha fruticosa shrub seeds germinate in 7-9 days, so that the germination of the sophora moorcroftiana seeds is relatively less.

2. The green composition can be clearly seen after 15 days of spray sowing, the coverage degree reaches 90 percent, and the plants grow robustly.

3. After 25 days, green walls are obviously seen, and the vegetation coverage is up to 96%. The height of the gramineous plants is 13-15cm, the root system is developed, and the average root length is 6-7 cm. The height of the sand sagebrush plants is up to 5cm, and the alfalfa grows vigorously and densely. The growth vigor of the whole plant is obviously superior to that of vegetation on surrounding hillsides.

And (4) conclusion: the sand dune side slope greening method disclosed by the invention can better solve the problems of soil, nutrient substances, water retention, fertilizer retention and the like required by the growth of plants on the sand dune side slope, the plants can form a lawn after 25 days of construction, the lawn is uniform and fast, and the plants grow strongly and densely. The ecological bag used by the sand dune slope greening system is permeable to water and impermeable to soil, has strong tear resistance and is reinforced by the specially-made connecting fastener 1-2, so that the ecological wall is stable, and the phenomena of landslide and the like caused by rain wash are avoided.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a sand dune side slope is green device again which characterized in that includes: an ecological bag, a connector link with a pawl, a drain pipe, a soil improvement fiber composition, a vegetation seed and an anti-erosion fiber composition;

the erosion resistant fiber includes: wood fiber, water-retaining agent, artificial interlocking fiber, high molecular polymer, particle micropore base, attapulgite powder, chitosan, adhesive, kaolin and coloring agent;

the soil improvement fiber comprises the following components in parts by weight:

the anti-erosion fiber comprises the following components in parts by weight:

the artificial interlocking fiber is obtained by spinning after dissolving natural degradable high molecular compounds and derivatives thereof; the natural degradable high molecular compound and the derivatives thereof are specifically wood, bamboo, coconut shell, seaweed, straw and miscanthus;

the particle microporous base is prepared by mixing powder and instant sodium silicate; the instant sodium silicate is powder instant sodium silicate; the powder is formed by mixing water-quenched blast furnace slag of a steel plant, fly ash and sodium sulfate; the water-quenched blast furnace slag of the steel plant accounts for 70% of the total weight of the granular microporous base, the fly ash accounts for 15% of the total weight of the granular microporous base, and the sodium sulfate accounts for 15% of the total weight of the granular microporous base; the instant sodium silicate accounts for 1 percent of the total weight of the powder;

the high molecular polymer is polyacrylonitrile fiber.

2. The sand dune slope greening device according to claim 1, wherein the preparation method of the ecological bag comprises the following steps:

3. The sand dune slope regreening device according to claim 2, wherein the step 1) comprises the following steps by weight:

95-97 parts of polypropylene rubber particles;

3-5 parts of anti-aging polypropylene master batch.

4. The apparatus of claim 1, wherein the amount of the soil improvement fiber used is determined by the organic content of the slope, and the relationship between the organic content of the slope and the amount of the soil improvement fiber is as follows:

5. the sand dune slope greening device according to claim 1, wherein the usage amount of said erosion resistant fibers is determined by the slope of the sand dune slope, and the relationship between the slope of the sand dune slope and the usage amount of said erosion resistant fibers is as follows:

6. The sand dune slope greening device according to claim 1, wherein the vegetation seeds are cold-resistant, drought-resistant, barren-resistant, and suitable for local climatic environment and geographical position.

7. A sand dune slope greening method using the sand dune slope greening apparatus as claimed in any one of claims 1 to 6, comprising the steps of:

5) the mixture of the erosion-resistant fiber composition and the vegetation seeds is placed on the surface of the tertiary sand dune slope greening device to form the sand dune slope greening device;

the anti-erosion fiber comprises the following components in parts by weight:

the high molecular polymer is polyacrylonitrile fiber.

8. The sand dune slope regreening method as claimed in claim 7, wherein step 3)) further comprises fixedly arranging the drain pipe at the near edge area of the sand dune slope, and the opening of the drain pipe at the near edge area of the sand dune slope is wrapped by gauze or/and the ecological bag.