Method for removing heavy metal cadmium in soil of agricultural equipment and overcoming successive cropping obstacle

Abstract

The invention belongs to the technical field of soil improvement, and discloses a method for removing heavy metal cadmium in soil of agricultural equipment and overcoming successive cropping obstacle. The method comprises: carrying out heavy metal content and component analysis on a soil sample; preparing a soil remediation agent based on the content of heavy metals in the soil and a soil component analysis result; applying the prepared soil remediation agent to the soil to be remediated, and subjecting the soil to rotary tillage, uniform mixing and leveling; irrigating the soil by using pre-treated underground water; and sowing restoration plants in the irrigated soil, and harvesting the plants. Environment-friendly materials such as activated carbon are combined with remediation plants for soil remediation, natural circulation of farmland nutrients can be promoted, the purpose of treating soil environmental pollution is achieved, source control over agricultural product safety is achieved, the quality safety level of agricultural products is comprehensively improved, the exchangeable amount of cadmium ions is reduced, the cadmium ions are stabilized, the form of heavy metal cadmium in facility agriculture soil is changed, the effectiveness of the heavy metal cadmium in the soil is reduced, and cadmium absorption of crops is reduced.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, in particular to a method for repairing heavy metal cadmium and continuous cropping obstacles in protected agricultural soil. Background technique [0002] At present, protected agriculture is a modern agricultural method that uses engineering technology to efficiently produce animals and plants under relatively controllable conditions. It is generally divided into multi-span greenhouses, solar greenhouses, plastic greenhouses, and small arched Sheds) are in a semi-closed state and have the characteristics of high temperature, high humidity, large evaporation, no rain washing, no subsidence, high multiple cropping index, large amount of fertilizer (especially organic fertilizer), etc., leading to soil acidification , salinization, nutrient imbalance and excessive accumulation, and heavy metal accumulation, etc., the soil pollution is serious, which affects economic benefits and leads to ...

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Problems solved by technology

[0003] Through the above analysis, the existing problems and defects of the existing technology are: the soil pollution of the existing facility agriculture is serious, which affects the economic benefits and leads to the decline of the quality of agricultural products

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