Composite improvement method for reclamation soil of semi-arid mining area
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A semi-arid and soil technology, applied in the restoration of polluted soil, land preparation methods, agricultural machinery and tools, etc., can solve the problems of restricting the effect of improving reclaimed land, inability to increase soil fertility, and poor effect of improving soil, etc., to achieve improvement Improved benefits, improved soil physical and chemical properties, and no ecological risk
Inactive Publication Date: 2020-08-25
LIAONING TECHNICAL UNIVERSITY
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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 appli
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Embodiment 1～4
[0032] The first group of examples 1 to 4: Mix 1.35g of Trichoderma, 3.375g of Bacillus subtilis, and 3.375g of Bacillus colioids to form a microbial mixed inoculum, and then mix it with 177g of alfalfa to form a biological fertilizer. In step 4, the water retention agent The dosage is 0g / m 3 , 170g / m 3 , 510g / m 3 , 850g / m 3 .
Embodiment 5～8
[0033] The second group of Examples 5-8: Mix 4.05g of Trichoderma, 10.125g of Bacillus subtilis, and 10.125g of Bacillus colioids to form a microbial mixed inoculum, and then mix with 486g of alfalfa to form a biological fertilizer. In step 4, the water-retaining agent The dosage is 0g / m 3 , 170g / m 3 , 510g / m 3 , 850g / m 3 .
Embodiment 9～12
[0034] The third group of Examples 9-12: Mix 6.75 g of Trichoderma, 16.875 g of Bacillus subtilis, and 16.875 g of Bacillus colioids to form a microbial mixed inoculum, and then mix it with 810 g of alfalfa to form a biological fertilizer. In step 4, the water-retaining agent The dosage is 0g / m 3 , 170g / m 3 , 510g / m 3 , 850g / m 3 .
[0035] Table 1 is the effect of different contents of microbial mixed bacteria agent and water retaining agent on soil fertility.
[0036]
[0037]
[0038] From the data in Table 1, it can be known that, compared with the comparative example, the soil organic matter and total nitrogen content in Examples 1-12 showed an overall increase, while the total phosphorus and total potassium content generally showed a decrease. Based on the composite improvement method of the invention, the content of soil organic matter and nitrogen can be increased, the activation of soil-fixed phosphorus and potassium can be promoted, and the availability of s...
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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. ...
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