Soil improving method

Abstract

The invention provides a soil improving method. The method enables the soil of to-be-improved land to be improved after two years. In the first year, no crop is planted in the to-be-improved land but the cultivation steps including rotary tillage, fertilization and irrigation are conducted, wherein natural soil conditioners are used in the rotary tillage process and organic fertilizer is used in the fertilization process. In the second year, green manure crops are planted in the to-be-improved land and organic fertilizer is used. The soil improved by using the soil improving method is characterized in that organic matter is increased, beneficial microorganism communities increase, the gas permeability and the water preservation capability of the soil are improved, the soil carbon sink is increased, the pesticide residues and heavy metal of the soil are degraded and meet the requirement of organic farming, organic conversion of the soil can be completed rapidly and the soil can pass the organic farming certification.

Description

technical field [0001] The invention relates to soil improvement technology, in particular to a soil improvement method. Background technique [0002] In the process of traditional agricultural planting, a large amount of pesticides and chemical fertilizers are often applied. Long-term application of large amounts of pesticides and chemical fertilizers will not only cause soil fertility to decline and productivity to decline, but also destroy the soil aggregate structure, reduce porosity, and increase bulk density. Reduced water retention and air permeability will also cause problems such as accumulation of heavy metals and serious salinization in the soil. For example, in a protected area, pesticides and chemical fertilizers have been applied during the planting process for more than 5 years. The physical and chemical properties of the soil are: organic matter content 2-4%, heavy metals exceeding the secondary standard in the soil environmental quality standard GB15618 2-5 ...

AI Technical Summary

Problems solved by technology

[0002] In the process of traditional agricultural planting, a large amount of pesticides and chemical fertilizers are often applied. Long-term application of large amounts of pesticides and chemical fertilizers will not only cause soil fertility to decline and productivity to decline, but also destroy the soil aggregate structure, reduce porosity, and increase bulk density. Water retention and air permeability are reduced, and there will be problems such as accumulation of heavy metals and serious salinization in the soil

For example, in a protected area, pesticides and chemical fertilizers have been applied during the planting process for more than 5 years. The physical and chemical properties of the soil are: organic matter content 2-4%, heavy metals exceeding the secondary standard in the soil environmental quality standard GB15618 2-5 times, cadmium and mercury More than 1mg / kg; pesticide residues of BCH and DDT, 5-10 times higher than the secondary standard in the soil environmental quality standard GB15618, reaching more than 2.5mg / kg, such soil is difficult to obtain organic planting certification

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