Semi-arid hilly area low-disturbance soil preparation rainwater harvesting vegetation recovery method

Abstract

The invention relates to a semi-arid hilly area low-disturbance soil preparation rainwater harvesting vegetation recovery method. The method comprises the steps that according to the planting density of vegetation to be planted on a slope, a plurality of soil preparation members comprising arched curved plates are distributed on the slope; an opening of the arched curved plate in each soil preparation member faces the slope in the horizontal direction, and the arched curved plates are exposed out of the earth surface; vegetation is planted within the retaining range of each soil preparation member. As the soil preparation members are utilized for carrying out vegetation recovery on the slope, in the soil preparation process, the excavation and ground breaking work amount is small, the disturbance to the slope is small, and the problem that the formed soil texture platform type or pit-like local terrain structure is unstable is avoided. By the adoption of the recovery method, on the basis of effectively retaining rainfall runoff, the disturbance to soil from traditional soil preparation can be reduced greatly, and water and soil loss of soil preparation in the same year is reduced..

Description

technical field [0001] The invention relates to a land preparation technology for rain harvesting and afforestation, in particular to a low disturbance land preparation rain harvesting vegetation restoration method in semi-arid hilly areas. Background technique [0002] The semi-arid hilly area in the northwest is mainly located in the Loess Plateau, which is an area with fragile ecological environment, serious soil erosion, and concentrated poor population, especially the loess hilly and gully area. In the event of heavy rains, soil erosion will be severe, resulting in land damage and reduced productivity, which will become a serious constraint on the sustainable development of local society and economy, and cause a series of ecological and environmental problems. Water is the basis for maintaining vegetation growth. In the Loess Plateau, rainfall is the main or even the only source of water supply for vegetation. However, the average annual rainfall in most places in the r...

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Problems solved by technology

However, both of these two methods of site preparation have problems such as large excavation and soil-breaking works, strong disturbance on the slope surface, and instability of the formed soil platform or pit-shaped local topographic structure, which will lead to a large amount of new loose soil due to disturbance in the year of site preparation. , encountered heavy rainfall and soil erosion increased significantly compared with that before land preparation; the land preparation has been seriously damaged due to local topographical structure instability and long-term runoff erosion for many years.

In addition, due to the need for large-scale manual excavation and landfill, these two land preparation methods are relatively extensive in planning, design and actual operation, and the vegetation carrying capacity of slope water is not considered carefully enough, resulting in the survival rate of vegetation in the later period. The conservation rate is not high, many degraded and low-efficiency plantations are formed, and the benefits of water and soil conservation are low

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