Biological compound soil conditioner and preparation method thereof

Abstract

The invention discloses a biological compound soil conditioner and a preparation method thereof. The soil conditioner is prepared from the following raw materials: 5-20% of urea, 5-20% of ammonium dihydrogen phosphate, 1-4% of mycorrhizal fungi and the balance of active lignite. The preparation method comprises the steps of (1) crushing the active lignite into solids with wide range particles; (2) preparing a urea saturation solution; (3) preparing an ammonium dihydrogen phosphate saturation solution; (4) mixing and stirring active lignite particles with the urea saturation solution and the ammonium dihydrogen phosphate saturation solution; (5) ventilating and drying the evenly stirred mixture at a room temperature; (6) stirring and mixing the dried mixture and the mycorrhizal fungi evenly to obtain the biological compound soil conditioner; and (7) hermetically packaging the biological compound soil conditioner. The preparation method is simple; the produced biological compound soil conditioner has the characteristics of high biological activity, excellent adsorptive property and low cost, multiple nutrients for plant growth can be provided and the technical problems of serious water and fertilizer losses and a low plant survival rate in the soil conditioning process are solved.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a biological composite soil improver and a preparation method thereof. Background technique [0002] Land resources are conditionally renewable resources, and timely reclamation after mining can restore the land and ecological environment to the original level and minimize the impact of mining on the environment. common needs for development. The continuous increase in the intensity of mineral resources development has led to serious damage to the land resources in the mining area, making the land lose its use value. China is the world's largest coal producer and consumer, but open-pit mining, which accounts for 4% of coal mines, has greatly damaged land resources and vegetation. Relevant departments predict that by 2020, China's open-pit coal mining will destroy 0.22hm of land 2 / 10,000 tons, the damage to land resources and ecological environment in mining areas is ...

AI Technical Summary

Problems solved by technology

Relevant departments predict that by 2020, China's open-pit coal mining will destroy 0.22hm of land 2 / 10,000 tons, the damage to land resources and ecological environment in mining areas is becoming more and more serious. Although the Chinese government has always attached importance to land reclamation in mining areas since the promulgation of my country's "Land Reclamation Regulations" in 1989, the reclamation rate is about 8%, which is in line with the international 50 % of reclamation rates vary widely

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