Method of cyclic sustainable vegetation recovery for waste dump of grassland mining area

Abstract

The invention discloses a method of cyclic sustainable vegetation recovery for a waste dump of a grassland mining area. Surface soil and subsoil need to be treated respectively in piling of earth and rock in the waste dump, and the subsoil, stone blocks and the like are piled at the foundation position of a slope; the surface soil is piled independently and used at the necessary position on the slope; the slope of the waste dump is divided into a slope top treatment area, an abrupt-slope treatment area, a medium-slope treatment area and a gentle-slope treatment area according to the gradient of the slope; different plants are planted in the treatment areas, and the treatment areas are covered with meshed coverings of different light transmittances; a rainwater collection system is designed in each treatment area to drain, collect and reuse the rainwater on the slope; plant breeding bases are established around the waste dump; the rainwater collected by the rainwater collection systemsis mainly used for irrigating and breeding plants in the bases, and plant seeds for slope treatment are mainly from the breeding bases. By the method, soil can be improved and soil and water loss canbe controlled effectively. The method has bright application prospect and popularization value for semi-arid grassland areas.

Description

technical field [0001] The invention relates to a recycling and sustainable grassland mining area vegetation recovery method, in particular to a semi-arid grassland mining area dump site vegetation recovery method. Background technique [0002] The climate in the semi-arid steppe area is dry, the annual rainfall is less than 400 mm, the vegetation is dominated by herbaceous plants, grassland degradation often occurs, and the ecological environment is fragile. In recent years, with the increasing demand for energy in the country's economic development, mineral mining activities in semi-arid grasslands have become increasingly intense. The mining of minerals has led to a large amount of earth stripping and accumulation, forming a large accumulation body in the mining area. The large-scale soil mounds formed by these dumps are difficult to restore vegetation on the slope. What is particularly difficult is that in the semi-arid grassland area, the rainfall is low and the time d...

AI Technical Summary

Problems solved by technology

These technologies have played a certain role in the vegetation restoration of the dump site to varying degrees, especially in the first year when the measures were implemented, the effect was very good, but the vegetation on the slope gradually degraded in the second and third years, because the maintenance in the first year The measures are good, a large amount of irrigation and watering ensures the water needed by the plants, but the irrigation and other maintenance measures cannot keep up in the following years, resulting in slow or stagnant growth of vegetation, and even the death of all plants

However, soil improvement and slope guest soil technology require a large amount of topsoil, but in the actual environment, the topsoil resources are very limited, and the addition of other organic fertilizers increases the cost, so these measures are neither long-term nor likely to be popularized on a large scale , did not fundamentally solve the problem of vegetation restoration

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