阅读说明：本技术 一种沙化土地植被恢复方法 (Desertification land vegetation recovery method ) 是由 沈奕锋 丁鼎 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种沙化土地植被恢复方法,包括以下步骤：步骤a、在需治理的沙化土地上挖出横竖排列的圆坑,相邻的四个圆坑作为一个种植单元；步骤b、在圆坑覆填混合基质沙土；步骤c、制作植物种子保护袋；步骤d,将植物种子保护袋大半埋入上述圆坑混合基质沙土中,再在上述圆坑表面铺设一层当地沙土,与上述保护袋上端面齐平即可；步骤e、每四个种植单元组成一个方格组成一个方格,方格外筑沙袋挡墙；步骤f、在方格内开十字沟槽,沟槽内覆填上述混合基质沙土,然后在沟槽内均匀铺洒旱生草本植物种子,最后在沟槽表面铺设一层当地沙土。本发明的一种沙化土地植被恢复方法,能够应对沙化土地恶劣条件,达到良好蓄水效果,提高植被存活率。(The invention discloses a desertification land vegetation recovery method, which comprises the following steps: a, digging round pits which are arranged horizontally and vertically on desertification land to be treated, wherein four adjacent round pits are used as a planting unit; step b, filling the circular pits with the mixed matrix sandy soil; c, manufacturing a plant seed protection bag; d, burying most of the plant seed protection bags into the circular pit mixed matrix sandy soil, and paving a layer of local sandy soil on the surface of the circular pit to be flush with the upper end face of the protection bags; step e, forming a square grid by every four planting units, and building a sand bag retaining wall outside the square grid; and f, forming a cross groove in the square grid, filling the mixed matrix sandy soil in the groove, uniformly spreading the dryland herbaceous plant seeds in the groove, and finally laying a layer of local sandy soil on the surface of the groove. The desertification land vegetation recovery method can cope with the severe conditions of desertification land, achieve good water storage effect and improve the vegetation survival rate.)

1. A desertification land vegetation recovery method is characterized in that: the method comprises the following steps:

a, digging round pits which are arranged horizontally and vertically on desertification land to be treated, wherein four adjacent round pits are used as a planting unit;

step b, filling the circular pits with the mixed matrix sandy soil;

c, manufacturing an open plant seed protection bag, wherein the protection bag is internally provided with a two-layer structure and comprises a water-retaining matrix layer and a surface covering layer from bottom to top, wherein the dryland shrub plant seeds are uniformly spread on the surface of the water-retaining matrix layer;

d, burying most of the plant seed protection bags into the sand soil of the mixed matrix of the round pits, and paving a layer of local sand soil on the surfaces of the round pits to be flush with the upper end surfaces of the plant seed protection bags;

step e, forming a square grid by every four planting units, and building a sand bag retaining wall outside the square grid;

and f, forming a cross groove in the square grid, filling the mixed matrix sandy soil in the groove, uniformly spreading the dryland herbaceous plant seeds in the groove, and finally laying a layer of local sandy soil on the surface of the groove.

2. The method for recovering vegetation in sandy land as set forth in claim 1, wherein: in the step a, the diameter of each circular pit is 30cm, the depth of each circular pit is 20cm, the center distance between two adjacent circular pits in the same row is 90cm, and the center distance between two adjacent circular pits in the same column is 90 cm.

3. The method for recovering vegetation in sandy land as set forth in claim 1, wherein: in the step b, the thickness of the mixed matrix sandy soil is 10-12 cm, and the mixed matrix sandy soil comprises sandy soil, sawdust, organic fertilizer, trace element fertilizer, soil water-retaining agent and soil adhesive.

4. The method for recovering vegetation in sandy land as set forth in claim 1, wherein: in the step c, the plant seed protection bag is made of degradable non-woven fabrics, the thickness of the bag body is 0.5-1 mm, the diameter is 10cm, the height is 10cm, the thickness of the water-retaining matrix layer is 8-9cm, and the thickness of the surface covering layer is 1 cm.

5. The method for recovering vegetation in sandy land as set forth in claim 4, wherein: the water-retaining matrix layer comprises sandy soil, plant ash, bentonite, vermiculite and rooting powder, the surface covering layer comprises sandy soil and straw fiber, and the dryland shrub seeds are formed by mixing two or more of overlord, red sand, Caryopteris mongolica, Caragana alba, Aleurystis alternifolia and Caragana deserticola.

6. The method for recovering vegetation in sandy land as set forth in claim 1, wherein: in step d, the plant seed protection box is buried to a depth of 2/3 to 4/5.

7. The method for recovering vegetation in sandy land as set forth in claim 1, wherein: and e, transversely stacking the sand bags in the sand bag retaining wall according to a two-layer staggered mode, wherein the length of each sand bag in the sand bag retaining wall is 30cm, the width of each sand bag is 15cm, and the height of each sand bag is 15 cm.

8. The method for recovering vegetation in sandy land as set forth in claim 1, wherein: in the step f, the width of the groove is 20cm, the depth is 20cm, and the xerophyte seeds are two or more of sand bamboo, sand rice, shallot, green bristlegrass, caltrop, peganum harmala, common seepweed herb, splendid achnatherum and sophora alopecuroides.

Technical Field

The invention relates to a desertification land vegetation recovery method, and belongs to the technical field of desertification land environment recovery methods.

Background

Sandy land refers to degraded land where the surface of the earth, formed by various factors, exhibits a primary sign of sand material under various climatic conditions, including land that has already been sandy and land that has a significant tendency to sand. At present, vegetation in a normal state is not suitable for large-scale planting of desertified land in an abnormal state, and the survival rate is low due to severe weather conditions and insufficient water source supply, so that the conditions of improving and utilizing the desertified land can not be realized in a short time.

Disclosure of Invention

The invention aims to provide a desertification land vegetation recovery method which can cope with the severe conditions of desertification land, achieve good water storage effect and improve the survival rate of vegetation, aiming at the defects of the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a desertification land vegetation recovery method comprises the following steps:

a, digging round pits which are arranged horizontally and vertically on desertification land to be treated, wherein four adjacent round pits are used as a planting unit;

step b, filling the circular pits with the mixed matrix sandy soil;

c, manufacturing an open plant seed protection bag, wherein the protection bag is internally provided with a two-layer structure and comprises a water-retaining matrix layer and a surface covering layer from bottom to top, wherein the dryland shrub plant seeds are uniformly spread on the surface of the water-retaining matrix layer;

d, burying most of the plant seed protection bags into the sand soil of the mixed matrix of the round pits, and paving a layer of local sand soil on the surfaces of the round pits to be flush with the upper end surfaces of the plant seed protection bags;

step e, forming a square grid by every four planting units, and building a sand bag retaining wall outside the square grid;

and f, forming a cross groove in the square grid, filling the mixed matrix sandy soil in the groove, uniformly spreading the dryland herbaceous plant seeds in the groove, and finally laying a layer of local sandy soil on the surface of the groove.

In the step a, the diameter of each circular pit is 30cm, the depth of each circular pit is 20cm, the center distance between two adjacent circular pits in the same row is 90cm, and the center distance between two adjacent circular pits in the same column is 90 cm.

In the step b, the thickness of the mixed matrix sandy soil is 10-12 cm, and the mixed matrix sandy soil comprises sandy soil, sawdust, organic fertilizer, trace element fertilizer, soil water-retaining agent and soil adhesive.

In the step c, the plant seed protection bag is made of degradable non-woven fabrics, the thickness of the bag body is 0.5-1 mm, the diameter is 10cm, the height is 10cm, the thickness of the water-retaining matrix layer is 8-9cm, and the thickness of the surface covering layer is 1 cm.

The water-retaining matrix layer comprises sandy soil, plant ash, bentonite, vermiculite and rooting powder, the surface covering layer comprises sandy soil and straw fiber, and the dryland shrub seeds are formed by mixing two or more of overlord, red sand, Caryopteris mongolica, Caragana alba, Aleurystis alternifolia and Caragana deserticola.

In step d, the plant seed protection box is buried to a depth of 2/3 to 4/5.

And e, transversely stacking the sand bags in the sand bag retaining wall according to a two-layer staggered mode, wherein the length of each sand bag in the sand bag retaining wall is 30cm, the width of each sand bag is 15cm, and the height of each sand bag is 15 cm.

In the step f, the width of the groove is 20cm, the depth is 20cm, and the xerophyte seeds are two or more of sand bamboo, sand rice, shallot, green bristlegrass, caltrop, peganum harmala, common seepweed herb, splendid achnatherum and sophora alopecuroides.

The invention has the beneficial effects that: the invention provides a desertification land vegetation recovery method. The invention can improve the germination rate of the dryland shrub seeds by using the plant seed protection bag. The plant seed protection bag is arranged in the excavated round pit, so that water storage and water retention are facilitated, sufficient moisture is provided for growth of shrub seedlings, and the survival rate of the shrub seedlings can be improved. Through excavating the cross slot and sowing the xerophyte, the diversity of the plant types in the treatment area can be improved while retaining water. By constructing the sandbag retaining wall, the sandstorm can be blocked, the erosion caused by wind erosion is reduced, and the retention of water and fertilizer is facilitated. Through the series of measures, the survival rate of the plants in the desertified land can be greatly improved, and the desertification degree of the land is reduced by utilizing the soil and sand fixing capacity of the plant root system.

Description of the drawings:

FIG. 1 is a general design layout of a method of recovering vegetation from sandy land in accordance with the present invention.

Detailed Description

The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.

As shown in fig. 1, the invention provides a method for recovering vegetation on desertified land, which comprises the following steps:

the method comprises the following steps: regular round pits 1 with the diameter of 30cm and the depth of 20cm are dug on desertified land to be treated, the center distance between two round pits 1 in the same row is 90cm, the distance between rows is also 90cm, and each 4 round pits 1 are regarded as a planting unit (a square area of 90cm by 90 cm). When the rain falls, the rain water scours the ground and stays in the dense round pits 1, and because of the shape of the round pits 1, the water is firmly locked and cannot be easily lost.

Step two: and filling sand soil with a mixed matrix thickness of 10-12 cm, which comprises sand soil, sawdust, organic fertilizer, a small amount of trace element fertilizer, a soil water-retaining agent and a soil adhesive, into the round pit 1. The sandy soil is prepared from local sandy soil, the organic fertilizer is cattle and sheep manure and the like, and the microelement fertilizer is prepared from manganese sulfate, sodium molybdate dihydrate and boric acid according to the proportion of 3: 1: 1, and the soil water-retaining agent and the soil adhesive are purchased from the market.

Step three: an open plant seed protection bag is manufactured, the material is degradable non-woven fabric material (the air permeability is good, plant roots can penetrate through the bag body to grow freely), the bag is degraded in about 6-12 months, the thickness of the bag body is 0.5-1 mm, and the size is 10cm in diameter and 10cm in height. The plant seed protection bag is internally provided with two layers of structures, the lower layer is a water-retaining matrix layer with the thickness of 8-9cm and contains sandy soil, plant ash, bentonite, vermiculite and rooting powder, the drought shrub plant seeds are uniformly spread on the surface of the water-retaining matrix layer, the upper layer is a surface covering layer with the thickness of 1cm and contains sandy soil and straw fibers, and the surface covering layer can play a role in shading, preserving heat and retaining water. The sandy soil in the plant seed protective bag is obtained by taking local sandy soil. The above dryland shrub seeds are selected from two or more of Tylophora ovata, Halloysitum rubrum, Caryopteris mongolicus, Caragana alba, Lepidium meyenii, and Caragana deserticola.

Step four: most of the seed protection bags are buried in the mixed matrix sandy soil of the round pits, and then a layer of local sandy soil is paved on the surface of the round pits and is flush with the upper end surfaces of the plant seed protection bags. The plant seed protection bag is embedded into the plant seed protection bag from 2/3 to 4/5.

Step five: every 4 planting units form 1 square grid, a sand bag retaining wall is built outside the square grid, the sand bags are 30cm long, 15cm wide and 15cm high and are transversely stacked according to a 2-layer staggered mode, and finally the sand bag retaining wall 30cm wide and 30cm high is formed. The sand bag is filled with local sand. The sandbag retaining wall is relatively high in economy, can effectively block sand blown by the wind, and prevents water and nutrients in the square from losing.

Step six: and (3) forming a cross groove 3 in the square grid, wherein the width and the depth of the groove are 20cm and 20cm, and the mixed matrix sandy soil with the thickness of 10-12 cm is filled in the groove. Uniformly spreading two or more of dryland herbaceous plant seeds such as sand bamboo, sand rice, shallot, green bristlegrass, puncturevine, peganum harmala, common seepweed herb, splendid achnatherum herb, sophora alopecuroides and the like in the groove, and finally spreading a layer of local sandy soil with the thickness of 2-3 cm on the surface of the groove. The grooves can collect precipitation, so that water is not easy to evaporate. The vegetation can be recovered in a diversity mode through the herbaceous plants, and finally the vegetation recovery is more stable.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.