Composite improvement method for reclamation soil of semi-arid mining area

Abstract

The invention discloses a composite improvement method for reclamation soil of a semi-arid mining area. The method comprises green manure, a microbial mixed inoculant and a water-retaining agent, wherein the green manure is alfalfa, and the microbial mixed inoculant is formed by mixing trichoderma, bacillus subtilis and bacillus mucilaginosus according to the proportion of 1: 2.5: 2.5. Harvested alfalfa is cut up, dried in the shade and mixed with the microbial mixed inoculant according to a certain proportion to obtain a biological fertilizer; then strip-shaped turning and pressing are conducted on reclamation soil of the semi-arid mining area, and a biological fertilizer layer is formed; a water-retaining layer is constructed on the biological fertilizer layer, so that the function of the biological fertilizer can be promoted by the water-retaining agent, the physical and chemical properties of the soil are improved by the water-retaining agent and the biological fertilizer which aresynergistic, the biological activity of the soil is improved, the water retention rate of the soil and the contents of organic matters and total nitrogen are effectively improved, the phosphorus andpotassium activation of soil fixation is promoted, and the construction of organic and efficient high-quality soil is quickly realized for mine reclamation land; meanwhile, the method has the advantages of convenience in material taking, low cost, simplicity and feasibility in operation, no ecological risk and the like.

Description

technical field [0001] The invention relates to a soil improvement method, in particular to a compound improvement method for reclamation soil in a semi-arid mining area. Background technique [0002] The dumping of dumps is the main form of land damage in mining areas, but scientific landform remodeling and land consolidation can provide rich reserve land resources for mining areas. However, there are serious problems of water and soil erosion, wind erosion, and soil pollution in newly-built dumps. Most of the semi-arid mining areas are located in areas with fragile ecological environments. Mechanical rolling causes poor soil structure, negatively affects the regional soil moisture and nutrient cycle, and poor vegetation recovery benefits. Scientific and artificial promotion of land reclamation and ecological reconstruction is the most effective way to solve the ecological damage and environmental pollution in this area. The key lies in Construction of a good soil system. ...

AI Technical Summary

Problems solved by technology

However, due to the shortage of water resources in the semi-arid mining area and serious drought interference, it was difficult to decompose alfalfa directly in the past, the decomposition time was long, and the soil improvement effect was poor; the single application of water-retaining agent can only improve the water holding capacity of the soil, but cannot increase soil fertility; Application of microorganisms, without input of organic fertilizer sources, seriously restricts its effect of improving reclamation land

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