CN212034740U - Grass blanket - Google Patents

Abstract

The present application provides a grass blanket. The grass blanket comprises a first sizing net, a palm fiber layer, a plant seed layer, non-woven fabrics and a second sizing net, wherein the first sizing net, the palm fiber layer, the plant seed layer, the non-woven fabrics and the second sizing net are sequentially connected from top to bottom. The application provides a grass blanket can protect soil not receive ambient temperature's influence, is showing to improve sand soil water content, keeps warm, ventilative, moisturizes, keeps apart, provides good environment and stable protection barrier to the growth of plant to prevention and cure soil desertification improves the plant survival rate in the sand soil.

Description

Grass blanket

Technical Field

The application relates to the technical field of soil control, in particular to a grass blanket.

Background

Land desertification refers to the degradation of land in arid, semi-arid and sub-humid arid regions caused by various factors such as climate change, human activities and the like, and is also called as "desertification". Land desertification has become an important environmental problem affecting the development of human society, the ecological environment is continuously destroyed due to frequent activities of human beings, and the desertification area is also continuously enlarged.

At present, wind prevention and sand fixation technologies are mainly adopted to inhibit land desertification. The wind prevention and sand fixation technology is mainly divided into three types, namely engineering sand fixation (also called mechanical sand fixation), biological sand fixation and chemical sand fixation, wherein the engineering sand fixation is a method for preventing quicksand by arranging a sand barrier, the biological sand fixation is a method for inhibiting land desertification by planting vegetation in a desert area, and the chemical sand fixation is a method for inhibiting desertification by spraying a chemical bonding material on a flowing sand dune or a sand ground to bond loose sand grains to form a bonding layer so as to prevent wind from blowing and carrying the sand grains.

However, no matter the engineering sand fixation method, the biological sand fixation method or the chemical sand fixation method is adopted, the cost is high, the application limitation is high, the desertification control effect is poor, and how to improve the desertification control effect still remains to be solved urgently.

Disclosure of Invention

In view of this, the present application provides a grass blanket to solve the technical defects in the prior art.

The application provides a grass blanket, the grass blanket includes first design net, palm fibrous layer, plant seed layer, non-woven fabrics and second design net, first design net, palm fibrous layer, plant seed layer, non-woven fabrics and second design net top-down link to each other in order.

Further, the thickness of the palm fiber layer is 15cm-25 cm.

Further, the plant seed layer comprises grass seeds and nutrient soil.

Further, the grass seeds include sand rice seeds, sand sagebrush seeds, sheep firewood seeds and flower stick seeds.

Furthermore, the mass ratio of the sand rice seeds, the artemisia desertorum seeds, the sheep firewood seeds and the flower stick seeds is 1:1:2: 2.

Further, the first sizing net, the non-woven fabric and the second sizing net are all made of polypropylene.

The utility model provides a grass blanket, by the first design net that top-down links to each other in order, the palm fibrous layer, the plant seed layer, non-woven fabrics and second design net are constituteed, the outward appearance is leveled, it is durable to sew up, good pliability has, stretch-proofing performance and anti-weathering performance, good water permeability has, water retention, structural stability, can protect soil not receive ambient temperature's influence, show to improve sand soil water content, heat preservation, it is ventilative, moisturize, keep apart, provide good environment and stable protection barrier to the growth of plant, thereby prevent and treat the desertification of soil, improve the plant survival rate in the sand soil.

Drawings

FIG. 1 is a schematic structural diagram of a grass blanket according to an embodiment of the present application;

FIG. 2 is a graph of the grass mat substrate loss rate according to the test example of the present application;

FIG. 3a is a schematic diagram showing the temperature change of 0-5cm soil according to the experimental example of the present application;

FIG. 3b is a schematic diagram showing the temperature change of 5-10cm soil according to the experimental example of the present application;

FIG. 3c is a schematic diagram showing the temperature change of 10-15cm soil according to the experimental example of the present application;

FIG. 3d is a schematic diagram showing the temperature change of the soil of 15-20cm according to the experimental example of the present application;

FIG. 4a is a schematic diagram showing the variation of humidity of 10cm soil according to the experimental example of the present application;

FIG. 4b is a schematic diagram showing the change in humidity of 20cm soil according to the experimental example of the present application;

FIG. 4c is a schematic diagram showing the change in humidity of soil of 30cm according to the experimental example of the present application;

FIG. 5 is a schematic diagram showing the comparison of the plant emergence rates in the test examples of the present application;

FIG. 6 is a graph showing the comparison of the retention rates of plants according to the experimental examples of the present application;

FIG. 7 is a schematic diagram showing the comparison of vegetation coverage in the experimental examples of the present application;

FIG. 8 is a schematic diagram showing a comparison of plant biomass according to the experimental examples of the present application;

reference numerals

1-a first sizing net, 2-a palm fiber layer, 3-a plant seed layer, 4-non-woven fabric and 5-a second sizing net.

Detailed Description

The following description of specific embodiments of the present application refers to the accompanying drawings.

Example 1

As shown in fig. 1, the present embodiment provides a grass mat, which comprises a first sizing net 1, a palm fiber layer 2, a plant seed layer 3, a non-woven fabric 4 and a second sizing net 5, wherein the first sizing net 1, the palm fiber layer 2, the plant seed layer 3, the non-woven fabric 4 and the second sizing net 5 are sequentially connected from top to bottom.

The grass carpet, also called vegetation carpet, is a product for greening engineering compounded by using special non-woven fabric 4 or wood pulp paper as carrier, placing seeds of plants such as trees, shrubs, grasses and the like on the carrier, applying a certain amount of base materials such as fertilizer and the like, and using special vegetation machinery.

The sizing net is a net structure used for fixing the palm fiber layer 2, the plant seed layer 3 and the non-woven fabric 4 in the grass blanket, the areas, the materials and the like of the first sizing net 1 and the second sizing net 5 are the same, the grids of the first sizing net 1 and the second sizing net 5 can be various polygonal grids such as triangular grids, quadrilateral grids, pentagonal grids and hexagonal grids, and the method is not limited in the application.

Preferably, both the first sizing net 1 and the second sizing net 5 are made of polypropylene. Polypropylene, PP for short, is a colorless, odorless, nontoxic and semitransparent solid substance. The polypropylene is thermoplastic synthetic resin with excellent performance, is colorless translucent thermoplastic light general-purpose plastic, and has chemical resistance, heat resistance, electric insulation, high-strength mechanical performance, good high-wear-resistance processing performance and the like. The double-layer shaping net made of polypropylene is used for fixing other hierarchical structures in the grass blanket, and has the advantages of heat resistance, wear resistance, high fixing strength, looseness prevention, good fixing effect, simple manufacturing process and long service life.

Palm, a evergreen tree of the family Palmae, is 7 m in height. The palm fiber is a reticular palm coat fiber formed by the leaf sheath at the periphery of the palm trunk. The palm fiber has the advantages of firmness, wear resistance, salt resistance, air permeability, light weight, corrosion resistance, high elasticity and the like, and the yield of the palm fiber is increased along with the annual increase of the planting area of the palm, so that the palm fiber is cheap and easy to obtain. In this embodiment, the thickness of the palm fiber layer 2 is 15-25cm, and may be 15cm, 16cm, 18cm, 20cm, 22cm, 24cm, 25cm, or the like.

The plant seed layer 3 comprises grass seeds and nutrient soil, the grass seeds comprise sand rice seeds, artemisia desertorum seeds, sheep firewood seeds and flower stick seeds, and the ratio of the sand rice seeds, the artemisia desertorum seeds, the sheep firewood seeds and the flower stick seeds is 1:1:2: 2.

Sand rice, also known as agriophyllum squarrosum, grows on moving sand dunes and bare sand lands in arid, semi-arid and semi-humid areas, and is a common sand plant in northern desert areas of China.

The sand sagebrush is a plant of Artemisia of Compositae, is a perennial herb, has creeping growth of sand sagebrush branches, is beneficial to wind prevention and sand resistance, has the characteristics of strong adaptability, dry and early resistance, wind erosion resistance, sand burying preference, fast growth, strong sand fixing effect and the like, and is a pioneer sand fixing plant species.

Sheep firewood, also known as poplar wood, petroselinum, perennial shrubs. The sheep firewood has rich root nodules, is beneficial to improving the sand land and improving the fertility of the sand land, has developed root systems and strong nitrogen fixation capacity, also has underground stems, has strong nutrition reproduction capacity, and is an ideal plant for preventing wind, fixing sand and controlling water and soil loss.

The flower stick, also called Yanzhi ruqi, belongs to the family Leguminosae, the plant of the shrub half, and is as high as 300 cm. Cold resistance, drought resistance, sand wind resistance, heat resistance and barren resistance, and is favored to live in the desert habitat of the sand area.

The plant seed layer 3 of the embodiment is provided with the sand rice seeds, the sand wormwood seeds, the sheep firewood seeds and the flower stick seeds in a ratio of 1:1:2:2, so that the grass blanket has good characteristics of cold resistance, drought resistance, wind resistance, sand resistance and the like, and the applicability of the grass blanket in desertification areas can be greatly improved by embedding the plant seeds in the grass blanket.

The nutrient soil is bed soil which is specially prepared for satisfying the growth and development of seedlings, contains various mineral nutrients, is loose and ventilated, has strong water and fertilizer retention capacity and does not have diseases and insect pests. The nutrient soil is generally prepared by mixing fertile field soil and decomposed animal manure. The nutrient soil of the present example contains carbonate ions (CO)₃ ^2-) Sulfate ion (SO)₄ ^2-) Chlorine ion (CL)^-) Bicarbonate ion (HCO)₃ ^-) Calcium ion (Ca)²⁺) Total nitrogen, phosphorus (P), potassium (K), organic matters and other nutrient elements which are beneficial to plant growth.

The nutrient soil is arranged in the plant seed layer 3, so that nutrient elements required for germination and growth and a proper germination and growth environment can be provided for the grass seeds in the plant seed layer 3, and the germination rate and the survival rate of the plant seeds after the grass blanket is laid are improved.

The nonwoven fabric 4, also called a nonwoven fabric, is composed of oriented or random fibers and is called a fabric because of its appearance and certain properties. The non-woven fabric 4 has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity or irritation, rich color, low price, recycling and the like.

The non-woven fabric 4 is used as a carrier of the plant seed layer 3, so that the air permeability and moisture resistance of the plant seeds are facilitated on the basis of preventing the plant seeds from leaking, and the growth and development of the plant seeds after the grass blanket is laid are facilitated.

It should be noted that, the hierarchical structures of the grass blanket may be manufactured by pressing or sewing, and the present application does not limit this.

The grass blanket comprises a first shaping net 1, a palm fiber layer 2, a plant seed layer 3, a non-woven fabric 4 and a second shaping net 5 which are sequentially connected from top to bottom, is flat in appearance, firm in sewing, good in flexibility, tensile resistance and wind erosion resistance, good in water permeability, water retention and structural stability, capable of protecting soil from being affected by external temperature, capable of remarkably improving water content of sand soil, heat-preserving, breathable, moisture-preserving and isolating, and capable of providing a good environment and a stable protection barrier for growth of plants, so that land desertification is prevented and the plant survival rate in the sand soil is improved.

Example 2

The embodiment provides an application method of the grass blanket in land desertification control.

The grass blanket comprises a first sizing net 1, a palm fiber layer 2, a plant seed layer 3, a non-woven fabric 4 and a second sizing net 5, wherein the first sizing net 1, the palm fiber layer 2, the plant seed layer 3, the non-woven fabric 4 and the second sizing net 5 are sequentially connected from top to bottom.

Further, the thickness of the palm fiber layer 2 is 15cm-25 cm.

Further, the plant seed layer 3 comprises grass seeds and nutrient soil.

Further, the grass seeds include sand rice seeds, sand sagebrush seeds, sheep firewood seeds and flower stick seeds.

Furthermore, the mass ratio of the sand rice seeds, the artemisia desertorum seeds, the sheep firewood seeds and the flower stick seeds is 1:1:2: 2.

Further, the first sizing net 1, the non-woven fabric 4 and the second sizing net 5 are all made of polypropylene.

Further, the grass blanket is paved on the ground of the target area, anchor bolts are nailed into the ground every 100cm, each anchor bolt is nailed downwards into the ground by 30cm to fix the grass blanket, and therefore land desertification of the target area is prevented.

The grass blanket can be in various shapes such as a square shape, a rectangular shape and a triangular shape, the grass blanket is paved on the ground without limitation, 30cm rivets are downwards nailed into the grass blanket every 100cm, the stability between the grass blanket and the ground and among all levels of the grass blanket can be effectively enhanced, and the influence of severe weather such as wind, sand and the like on the grass blanket is avoided.

According to the application method of the grass blanket in the prevention and control of the land desertification, the grass blanket is laid on the sandy land and used as a protection barrier of the sand soil, the soil is protected from being damaged by the external severe environment, and the plant seeds in the grass blanket germinate and grow on the sand soil, so that the wind and sand prevention and erosion resistance of the sand soil are effectively improved, and the land desertification is effectively prevented and controlled.

Test examples

The following experiment was completed using the grass blanket described in embodiment 1 of the present application, wherein the grass blanket includes a first sizing net, a palm fiber layer, a plant seed layer, a non-woven fabric, and a second sizing net, which are sequentially connected from top to bottom.

First, indoor test

1. Mechanical property test of grass blanket

Randomly selecting 3 blocks with the area of 1m²The grass blanket adopts an electronic balance (A)&D company), averaged, and measured with an electronic vernier caliper for measurement (Mitutoyo company), and the average weight of the grass blanket was 2023g/m²The average thickness was 20.14 mm.

The tensile strength of the grass blanket is tested by using an electronic multifilament strength tester (Nantong Sansi electromechanical technology, Inc.), and the tensile strength of the grass blanket is 842-860N/m.

Based on the test results, the grass blanket has good mechanical properties such as flexibility and stretch resistance, and further has good field practicability, and can be effectively prevented from being damaged due to stretching or treading.

2. Test of water permeability, water retention property and structural stability of grass blanket

Randomly selecting 3 blocks with the area of 1m²The grass blanket is initially weighed, then the grass blanket is placed in a water pool for soaking, the grass blanket is taken out after being completely soaked, the grass blanket is placed until water does not drip any more, the mass of the grass blanket is measured again, and the difference value of the previous weighing and the next weighing is the water holding capacity of the grass blanket.

Measured by tests, 1m²The initial mass of the grass blanket is 20.11g, after the grass blanket is soaked and placed until no water drops, the mass of the grass blanket is 65.78g, the difference value of the two is 45.67g, the water content of the grass blanket reaches 227%, and the grass blanket has good water permeability and water retention.

The rainfall simulation water spray is carried out in a laboratory, extreme rainfall conditions of a field test area, namely 3 hours of rainfall and 30mm/h of intensity are simulated, the soil loss condition in the grass blanket is measured continuously by adopting a weighing method within 3 hours of the test, the result is shown in figure 2, the horizontal axis in figure 2 represents precipitation time (min), and the vertical axis represents the matrix loss rate (%) of the soil, so that the matrix loss in the grass increases along with the increase of the strong precipitation time within 1.5 hours of the beginning of strong precipitation, the matrix loss rate is fastest within the first half hour of the beginning of the precipitation, the matrix quality in the grass blanket is almost unchanged after the precipitation time exceeds 1.5 hours, the matrix loss rate is stabilized at about 29%, wherein 26% occurs within the first 1.5 hours of the precipitation process. Therefore, the grass blanket structure has strong stability and can effectively resist the scouring of heavy rainfall.

Second, field test

The grass blanket is placed in a moving dune with the same amount of cloth in a storehouse and desert as a grass blanket group to be tried for one yearThe area of the test area of the grass blanket group is 1500m². The fluid dunes (40 ° 29'49.70"N, east longitude 108 ° 42'28.13" E) were selected experimentally in the stuccoed desert belly. The sand dune surface of the test area is not covered by vegetation. The analysis result of the physical and chemical properties of the sand grains on the ground surface of the test area shows that the grain diameter of the sand grains is 0.2-0.4 mm, the average pH value is 7.62, and the conductivity is 0.05ms.cm^-1Total salt content 0.6510g.kg^-1The organic content is 0.4283 g/kg.

The Kubuqin desert is located at the north part of the ridge line of the Ordos plateau, and the total area is about 1.86 multiplied by 104km²The moving dune accounts for about 61 percent, the height of the dune is 10-60 m, the form mainly comprises a dune chain and a grid dune, and the dune is one of three wind sand source areas of Jingjin Ji. The region belongs to a typical temperate continental semiarid seasonal climate, is long and cold in winter, mild and short in summer, rainy and windy in spring, cool in autumn and large in four-season temperature difference. The average annual temperature is 6-7.5 ℃, the temperature is coldest in 1 month, and the extreme lowest temperature is-32.1 ℃; the hottest in 7 months, the maximum extreme temperature was 38.7 ℃. The annual sunshine hours are 3000-3200 hours, the effective accumulated temperature is not less than 10 ℃ and is 2613.2-3221.1 ℃, the frost period is 122-144 d, the annual precipitation amount is 150-400 mm, the annual evaporation amount is 2100-2700 mm, and the dryness is 1.5-4. Annual average wind speed of 3-4 ms^-1Maximum wind speed 16.6ms^-1The number of big wind days is 25-35 d, and the east wind (ENE and E; 116.22VU) and the west wind (SW, WSW, W, WNW and NW; 104.71VU) are main wind directions of the blowing wind.

Arranging a vertical sand barrier group of salix mongolica, arranging the vertical sand barrier on a bare sand dune, wherein the slope of the sand dune is less than 25 degrees, and the test area of the vertical sand barrier group of salix mongolica is 1500m²The height of the sand barrier is 20cm, the specification is 1m multiplied by 1m, the porosity is less than 5%, the sowing mode adopts a furrow sowing mode, the row spacing is 1m, the furrow sowing depth is 2cm, and the sowing quantity is the same as the grass seed consumption of the grass blanket.

Setting a control group, wherein the area of the test zone of the control group is 1500m²The control group does not adopt any measures for preventing land desertification, and the conditions of other planting and the like are the same as those of the two groups.

All test times below were 2016 to 6 months to 2017.

1. Temperature influence test of grass blanket on soil

The desert climate automatic detection weather station (Jinzhou sunshine weather technology Co., Ltd.) is used for continuously observing and continuously recording the temperature changes of soil with the depth of 0-5cm, 5-10cm, 10-15cm and 15-20cm in the grass blanket group, the sand willow vertical sand barrier group and the comparison group, and the results are shown in a figure 3a, a figure 3b, a figure 3c and a figure 3 d.

FIG. 3a is a schematic diagram showing temperature changes of soil of 0-5cm, FIG. 3b is a schematic diagram showing temperature changes of soil of 5-10cm, FIG. 3c is a schematic diagram showing temperature changes of soil of 10-15cm, and FIG. 3d is a schematic diagram showing temperature changes of soil of 15-20cm, wherein the horizontal axis represents month and the vertical axis represents soil temperature (. degree. C.). It can be seen that the grass blanket has the greatest effect on the soil at a depth of 0-5cm, and the effect of the grass blanket on the soil is weakened as the depth of the soil increases. The grass blanket can play a role in cooling in summer and preserving heat in winter, for example, the soil temperature of 0-5cm of the grass blanket group in 7 months is 7.5 ℃ lower than that of a control group, the maximum cooling amplitude reaches 29.4 percent, the soil temperature of 0-5cm of the grass blanket group in 11 months is 1.3 ℃ higher than that of the control group, and the vertical sand barrier group of the salix mongolica has almost no influence on the temperature of the sand soil.

Therefore, the grass blanket is laid on the desertification soil, the ground temperature can be obviously reduced in hot weather, the heat preservation effect can be realized in winter, the damage to the plant seedlings caused by high temperature or low temperature is prevented, and the survival rate of the plants is improved.

2. Test for influence of grass blanket on soil humidity

The desert climate automatic detection weather station (Jinzhou sunshine weather technology Co., Ltd.) continuously observes and continuously records the soil humidity changes of 10cm, 20cm and 30cm depths of the grass blanket group, the salix psammophila vertical sand barrier group and the control group, and the results are shown in fig. 4a, 4b and 4 c.

FIG. 4a is a graph showing a change in soil moisture of 10cm, FIG. 4b is a graph showing a change in soil moisture of 20cm, and FIG. 4c is a graph showing a change in soil moisture of 30cm according to the experimental example of the present application, in which the horizontal axis represents months and the vertical axis represents soil moisture (%). It can be seen that the grass blanket has the greatest effect on the soil moisture at a depth of 10cm, and the effect of the grass blanket on the soil moisture decreases as the depth of the soil increases. The water content of the soil with the depth of 10cm in the 8-month grass blanket group is 2.9 times that of the control group, and the plant roots can absorb water and form a water evaporation channel because the number of plants in the vertical sand barrier group of the salix mongolica is more than that of the control group, so that the humidity of the soil with the depth of 10cm in the vertical sand barrier group of the salix mongolica is slightly lower than that of the control area on average, and the humidity of the soil with the depth of 20cm and the soil with the depth of 30cm in the vertical sand.

Therefore, the grass blanket can obviously improve the water content of the sand soil, and then improve the survival rate and the growth of plants.

3. Test of Effect of grass Blanket on plant growth in desertified soil

Randomly selecting 3 test areas with the area of 1m in each group²The method comprises the following steps of (1) marking and fixing, and continuously observing the growth and development conditions of plants:

(1) and (3) recording the seed emergence conditions of different test area samples every day, counting the germination number of the seeds when the seeds no longer emerge, and calculating the emergence rate, which is shown in figure 5.

As shown in fig. 5, the horizontal axis represents the group, the vertical axis represents the emergence rate (%), the emergence rates of the grass carpet group, the sand willow vertical sand barrier group and the control group are respectively 24%, 55% and 41%, since the plant seed layer is arranged inside the grass carpet, the seeds germinate in the grass carpet, and the grass carpet has a certain thickness, the emergence rate of the grass carpet group is the lowest, and since the sand willow vertical sand barrier group has a certain anti-wind erosion performance, the emergence rate of the sand willow vertical sand barrier group is the highest.

(2) The number of plants in the sample was counted every month and the plant sapling retention rate was calculated, see fig. 6.

As shown in fig. 6, the horizontal axis represents month, the vertical axis represents seedling number (number), and it can be seen that the number of the plants in the sample of the vertical sand barrier group of salix psammophila in 7 months is at most 98, and the number of the seedlings in the control group is only 36 due to the above number of seedlings; from 7 months to 11 months, due to high temperature, water shortage, wind erosion and the like in summer, the seedling number of the vertical sand barrier group and the control group of the salix mongolica is greatly reduced, the seedling number of the grass blanket group is increased, and the number of the stored plants exceeds that of the control area; the number of seedlings in the three groups is continuously reduced from 11 months to 5 months in the next year, the reduction rate is slowed down, the number of seedlings in the grass blanket group is reduced to the minimum, the reduction range is 27%, and the number of the seedlings stored in the grass blanket group is 53% more than that in the vertical sand barrier group of salix mongolica. After 5 months of the next year, the number of seedlings in three groups is increased due to the fact that new seeds germinate and grow, wherein the number of the plants in the same side of the grass blanket group is increased by 25%, and the growth is the largest.

Therefore, the grass blanket can reduce the surface temperature of desertification soil, maintain the soil moisture, resist wind erosion and help the growth of plants.

(3) The swatches were photographed every three months, and vegetation color range pixels were selected using Adobe Photoshop and vegetation coverage was calculated based on their percentage in the total pixels of the photograph, see fig. 7.

As shown in fig. 7, the horizontal axis represents month, and the vertical axis represents vegetation coverage (%), and it can be seen that the vegetation coverage of the grass blanket group is the largest, which reaches 35%, and is 1.7 times that of the vertical sand barrier group of salix mongolica.

Therefore, this application the grass blanket can effectively improve the plant survival rate, and then improve the vegetation coverage in region of laying.

(4) At the end of the test period, all plants were harvested by area, dried at constant temperature and weighed to obtain plant biomass data, see fig. 8.

As shown in fig. 8, the horizontal axis represents the group, and the vertical axis represents the biomass (%), it can be seen that the plant biomass of the grass blanket group is the maximum, 13.2g, which is 1.8 times of that of the vertical sand barrier group of salix mongolica.

Therefore, the grass blanket disclosed by the application is beneficial to improving the growing environment of plants, and can effectively improve the survival rate and biomass of the plants.

To sum up, this application the grass blanket can be used for the prevention and cure of land desertification, just this application the grass blanket have good pliability, stretch-proofing performance and anti-weathering performance, have good water permeability, water retention, structural stability, can effectively protect soil not receive ambient temperature's influence, show improvement sand soil water content, keep warm, ventilative, moisturize, keep apart, provide good environment and stable protection barrier to the growth of plant to prevention and cure land desertification improves the plant survival rate in the sand soil.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.

In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance, the premise that each other exists, and the like.

In this context, "equal", "same", etc. are not strictly mathematical and/or geometric limitations, but also include tolerances as would be understood by a person skilled in the art and allowed for manufacturing or use, etc.

Unless otherwise indicated, numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges subsumed therein.

The preferred embodiments and examples of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present application.

Claims (3)

1. The grass blanket is characterized by comprising a first sizing net (1), a palm fiber layer (2), a plant seed layer (3), a non-woven fabric (4) and a second sizing net (5), wherein the first sizing net (1), the palm fiber layer (2), the plant seed layer (3), the non-woven fabric (4) and the second sizing net (5) are sequentially connected from top to bottom.

2. Grass blanket as claimed in claim 1, wherein the thickness of the layer of palm fibres (2) is 15-25 cm.

3. Grass blanket as claimed in claim 1, wherein the plant seed layer (3) comprises grass seeds and nutrient soil.

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