CN101731092A - Recovery method of bare red sandstone abrupt slope vegetation - Google Patents

Abstract

The invention relates to a method for restoring vegetation on exposed red sandstone steep slopes. The method is: prepare the slope surface, make grass grids, arrange and fix the grass grids in a criss-cross pattern along the slope, prepare the plant cultivation substrate with soil, sand and fertilizer, fill the plant cultivation substrate into the nutrition bag, Plant herbs and shrubs to plant plants, dig planting holes in the grass grid, and bury the nutrition bag together with the herbs and shrubs in the planting holes. With the present invention, the grass grid and the slope soil layer together form a slope protection system, which effectively avoids the direct splashing of raindrops, prevents surface runoff from scouring, and plays an important role in the stability of the slope; the nutrition bag creates a good environment for vegetation planting. Growth conditions: Mixed planting of grass and shrubs can ensure that it takes root on the exposed red sandstone steep slope, restore vegetation in a large area, and achieve the purpose of water and soil conservation. The invention has the advantages of convenient construction, small investment, wide application, not easy to be destroyed by water, good effect, fast water and soil conservation, and ecological restoration.

Description

A method of vegetation restoration on exposed red sandstone steep slope

technical field

The invention relates to a method for restoring vegetation on exposed red sandstone steep slopes, which is a method for effective water and soil conservation and ecological restoration aimed at the exposed red sandstone steep slope areas formed due to ecological damage.

Background technique

The Danjiangkou Reservoir area is one of the areas with the most severe soil erosion in Hubei Province. For a long time, due to the dual influence of natural factors and human factors, large-scale construction, unreasonable deforestation and land reclamation have seriously damaged forest vegetation, resulting in a large number of barren hills and slopes. Especially in the area north of the Han River, where there are large areas of exposed red sandstone steep slopes, the parent materials of soil formation are mainly Tertiary red sandstone and weathered limestone, which have weak resistance to rainfall impact and low erosion resistance .

Vegetation coverage is a positive factor in preventing soil erosion among natural factors. The role of plants in soil and water conservation is mainly to intercept raindrops, regulate surface runoff, and improve soil properties. The root system can increase the strength of the soil, which is beneficial to the stability of the soil, thereby slowing down the occurrence of soil erosion.

Some existing recovery methods of vegetation ecology on steep slopes, such as "A Greening Technology for Steep and Soft Slopes" (Chinese Patent Application No. 03126603.7), are to use slope The combination of surface anchor rod hanging net and sprayed concrete greening technology can create good plant growth conditions. "A Method for Restoring Vegetation on Rocky Slopes in Northern Areas" (Chinese Patent Application No. 200510046947.7), clearing the slope, setting anchor rods, fixing and hanging plastic-encapsulated metal mesh on the anchor rods, selecting plant seeds suitable for local climate conditions, and Mixing; matrix configuration, spraying the upper matrix on the rock slope with metal mesh, adding the above-mentioned mixed seeds to the spare matrix, and then spraying it to the surface of the sprayed matrix layer; the matrix after spraying The layer is covered with a protective layer to maintain the substrate layer. "A Greening Method for High and Steep Rocky Slopes" (Chinese Patent Application No. 200710053060.X), constructing a high and steep rocky slope and a gentle slope belt covering layer set on it, and catchment ditches and water storage connected in sequence from top to bottom A greening system consisting of pools and irrigation pipes; plant climbing vegetation and/or overhanging vegetation on the covering soil layer of the gentle slope zone; plant mixed vegetation of trees, shrubs and grasses on the covering soil layer of the gentle slope zone. "A Lay-out Net-like Sand-fixing Grass Grid" (Chinese Patent Application No. 200710160214.5), which includes radial lines, weft lines and straw grass, and the radial lines and weft lines connect the straw grass into a criss-cross mesh grass composed of squares grid. Mesh grids are divided into vertical grass mesh sand-fixing grass grids and flat grass mesh sand-fixing grass grids according to their uses. Tie the wheat straw or other straws into a grass grid with a certain distance between the radial and weft distances, and then wrap the grass grid with a certain length and width on the container disc, and install the container disc on the tractor during the laying operation. Later, turn the assembly disc to spread the grass grid on the surface of the desert, and then insert the fixing pins according to the spacing requirements.

The exposed red sandstone steep slope area in the northern part of the Danjiangkou Reservoir Area has a steep slope, barren soil and poor site conditions. Direct planting, lack of required water and fertilizer, serious slope erosion, difficult vegetation growth, difficult to survive, and the above invention is not suitable for use in this area.

Contents of the invention

The purpose of the present invention is to aim at the above-mentioned present situation, aiming to provide a kind of bare red sandstone steep slope vegetation restoration method that is convenient in construction, low in investment, wide in application, not easily destroyed by water, good in effect, and can meet the requirements of rapid water and soil conservation ecological restoration.

The realization mode of the object of the present invention is, a kind of bare red sandstone steep slope vegetation recovery method, carry out according to the following steps:

1) Prepare the slope surface, repair and level the slope surface, clean up stones, weeds, garbage, and perform appropriate manual compaction,

2) Lay grass grids and make grass grids. The grass grids are made of corn stalks, wheat straw or straw materials. The grass grids are arranged in a criss-cross pattern along the slope, and the lower part of the grass grids is buried in the soil. , the part buried in the ground is compacted, and fixed on the slope surface by door nails to form a mesh grass lattice, a semi-concealed earth barrier in the shape of a grid,

3) prepare the plant cultivation substrate, the plant cultivation substrate is formed by mixing soil, sand and fertilizer, the weight ratio of soil, sand and fertilizer is 3:1:1, and the fertilizer is decomposed human and animal manure and decomposed manure and decomposed manure with a weight ratio of 1:1 Straw powder is mixed, or is the manure that adds N, P, K quick-acting fertilizer, and the weight ratio of manure and N, P, K quick-acting fertilizer is 3: 2 mixing,

4) Fill the plant cultivation substrate into the nutrition bag, plant herbs and shrubs in the cultivation substrate,

5) Dig a planting hole in the grass grid, and bury the nutrition bag in the planting hole together with the herbs and shrubs.

The present invention is aimed at the exposed red sandstone steep slope area in the northern part of the Danjiangkou reservoir area, where the slope is relatively large, the soil is barren, the site conditions are poor, the water and fertilizer required for direct planting are lacking, the vegetation is difficult to grow, difficult to survive, and cannot realize ecological restoration. A method invented.

The invention arranges and fixes grass grids in a criss-cross manner along the slope, mixes soil, sand and fertilizer in proportion, and fills them into nutrition bags, and the nutrition bags are planted into the soil together with herbs and shrubs. The grass grid and the slope soil layer together form a slope protection system, which effectively prevents raindrops from directly splashing and prevents surface runoff from scouring, and plays an important role in the stability of the slope; the nutrient bag can be decomposed by water and plant roots in the soil Or decomposed by microorganisms, without hindering the outward extension of the root system, the root system is easy to grow and fix in the steep slope soil layer, which is conducive to the growth of vegetation and achieves rapid and lasting ecological restoration under low maintenance conditions; mix herbs and shrubs , can establish a composite vegetation restoration process with shrubs as the main body and a combination of shrubs and grasses, which can ensure that it takes root on the exposed red sandstone steep slope, restores vegetation in a large area, and achieves the purpose of water and soil conservation.

The ecological restoration method of exposed red sandstone steep slope vegetation provided by the present invention has the advantages of convenient construction, small investment, wide application, not easy to be destroyed by water, good effect, and can meet the requirements of rapid soil and water conservation ecological restoration.

Description of drawings

Figure 1 is a schematic diagram of the grass grid structure,

Fig. 2 is a state diagram of the grass grid buried in the soil together with the nutrition bag.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

With reference to Fig. 1, Fig. 2, the present invention carries out as follows:

1) Prepare the slope surface, repair and level the slope surface, clean up stones, weeds, garbage, etc., and carry out appropriate manual compaction.

The exposed red sandstone steep slope of the present invention has a slope range of 20-50 degrees.

2) Lay the grass grid to make the grass grid 1. The grass grid is made of materials such as corn stalks, wheat straw or straw. Arrange the grass grids in a criss-cross pattern along the slope. The lower part of the grass grids is buried in the soil, and the buried part is compacted, and fixed on the slope surface by gate nails 2 to form a mesh grid. A grid-like semi-concealed earth barrier, the mesh grass grid is 35±10cm long and 35±10cm wide.

The grass grid is made of materials such as corn stalks, wheat straw or rice straw. The raw materials are the residues of local agricultural products after harvesting, which can be collected locally. After the grass grid measures are implemented, the grass grid and the slope soil layer together form a slope protection system, which effectively prevents the bare slope from being directly splashed by raindrops and prevents surface runoff from scouring, which plays an important role in the stability of the slope. Create good growing conditions for vegetation planting.

3) prepare the plant cultivation substrate, the plant cultivation substrate is formed by mixing soil, sand and fertilizer, the weight ratio of soil, sand and fertilizer is 3:1:1, and the fertilizer is decomposed human and animal manure and decomposed manure and decomposed manure with a weight ratio of 1:1 Straw powder is mixed, or is the manure that adds N, P, K quick-acting fertilizer, and the weight ratio of manure and N, P, K quick-acting fertilizer is 3: 2 mixing.

4) Fill the plant cultivation substrate into the nutrition bag 4, and plant herbs and shrubs in the cultivation substrate.

Using nutrition bag cultivation, the nutrition bag can be decomposed by water, plant roots or microorganisms in the soil, without hindering the outward extension of the root system, which plays an extremely important role in improving the survival rate of vegetation.

5) Dig a planting hole in the grass grid, and bury the nutrition bag together with the herbs and shrubs 3 in the planting hole.

According to the rock slope conditions of the exposed red sandstone steep slope area in the northern part of the Danjiangkou Reservoir area, two clusters of Asparagus and a white thorn flower or jujube were planted in the planting hole.

Asparagus grass (Eulaliopsis binata), a perennial herb of the Poaceae family, also known as squirrel grass, pseudo golden grass or sheep's beard grass. The clustered stems are round and slender, more than one meter long, with tea-brown fish-scale leaves underneath, and the flowers are light green.

White thorn flower (Sophora davidii), a deciduous shrub of the genus Sophora in the Fabaceae family, also known as Sophora japonica, Spike thorn, Bitter thorn flower, Horseshoe needle, etc., the plants are clustered or solitary, the plant height is 2 to 3 meters, the trunk is dark brown, There are longitudinal cracks, the new branches are green, with short hairs, the old branches are brown, and the branches have sharp needle-like thorns.

Zizipus jujube Mill, deciduous shrub of Rhamnaceae, 1-3 meters high, leaves elliptic to ovate-lanceolate, with finely serrated edges, drupe small, reddish-brown when ripe, subspherical or oblong.

These three plants are local suitable plants. Among them, Asparagus is resistant to barrenness and drought, has a well-developed root system, strong soil fixation and water storage capacity, large coverage of grass layers, remarkable effect of intercepting rain and soil conservation, less investment, quick results, economic life of up to 20 years, and ecological and economic benefits. significantly. Whitethorn grows rapidly and stably, with well-developed main and lateral roots, which can network and consolidate the soil. It is resistant to drought and barrenness, and has strong adaptability. It has certain advantages in water and soil conservation due to its developed root system and good community stability. . Sour jujube has a well-developed root system and strong tillering ability, which can be interwoven into a network structure. Its plants are low and its branches and leaves are luxuriant. It can effectively intercept precipitation and prevent runoff erosion, and has a good water and soil conservation effect.

Claims (4)

1. recovery method of bare red sandstone abrupt slope vegetation is characterized in that carrying out as follows:

1) domatic preparation, smooth to domatic place under repair, cleaning stone, weeds, rubbish, and carry out suitable hand compaction,

2) lay straw checkerboard barrier, make straw checkerboard barrier, straw checkerboard barrier is worked out by cornstalk, wheat straw or straw material, along domatic straw checkerboard barrier is arranged by crisscross mode, in placing into the soil in the straw checkerboard barrier lower part, be embedded in underground part and compress, and be fixed on the netted careless lattice of domatic formation by the door staple, be grid-like half hidden soil barrier

3) preparation plant cultivation media, plant cultivation media is mixed by soil, sand, fertilizer, soil, sand, fertile weight ratio are 3: 1: 1, and described fertilizer is that weight ratio is become thoroughly decomposed the people's animal manure and the straw powder mixing of becoming thoroughly decomposed in 1: 1, or for being added with N, P, the barnyard manure of K quick-acting fertilizer, barnyard manure and N, P, the weight ratio of K quick-acting fertilizer is mixing in 3: 2

4) plant cultivation media is inserted in the nutritious bag, in training matrix, is planted draft and shrub plantation plant,

5) in straw checkerboard barrier, dig kind of a plant hole, nutritious bag is imbedded in kind of the plant hole with draft and shrub plantation plant.

2. a kind of recovery method of bare red sandstone abrupt slope vegetation according to claim 1, the gradient scope that it is characterized in that bare red sandstone abrupt slope is the 20-50 degree.

3. a kind of recovery method of bare red sandstone abrupt slope vegetation according to claim 1 is characterized in that the long 35 ± 10cm of netted careless lattice, wide 35 ± 10cm.

4. a kind of recovery method of bare red sandstone abrupt slope vegetation according to claim 1 is characterized in that in kind of plant hole the plantation seedling is two bunches of Chinese alpine rush and white tattooing or wild jujube.

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