Soil remediation agent containing microbial metabolites as well as application and use method of soil remediation agent

Abstract

The invention belongs to the technical field of soil remediation, and discloses a soil remediation agent containing microbial metabolites as well as application and a use method of the soil remediation agent. On one hand, mycorrhiza composed of various raw material strains can regulate and control absorption and accumulation of plants to heavy metals by changing the forms of the heavy metals, expanding the extension range of plant root systems and the like, extraction and enrichment of the plants to the heavy metals are promoted, and then the heavy metals in soil are removed; on the other hand, the heavy metal migration ability of the microorganisms can be reduced through chelation of mycorrhizal secretions, fixation of root system cell walls, indoor isolation of intracellular heavy metal areas and other mechanisms, and then the immobilization effect of plant root systems on the heavy metal in the soil is enhanced. According to the method, the content of available chromium in soil in Changsha, a plant and a Hunan pool test station can be reduced by 12.2%-16.4%, the cadmium reduction rate of rice is reduced to 26.4%-36.5%, the yield of rice is increased, and the positive effects of fundamentally changing the physical and chemical properties of the soil, reducing the content of heavy metal in the soil, improving the polluted soil and repairing the health of the soil can be achieved.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a soil remediation agent containing microbial metabolites and its application and usage method. Background technique [0002] my country's arable land pursues a high yield per mu, and the excessive use of chemical fertilizers and pesticides has seriously polluted the soil, not only pesticide residues, harmful metals exceeding the standard, soil compaction, but also lack of organic matter, and soil-borne diseases are common, especially heavy metal pollution in the soil . [0003] The control of heavy metal pollution in soil is a major problem in today's world, because heavy metal pollution in soil is an irreversible process, and heavy metals in soil are non-degradable and difficult to remove by physical and chemical methods. The crops cultivated in such soil are often seriously polluted, endangering food safety and the health of the general public. [0004] M...

AI Technical Summary

Problems solved by technology

The main function of most soil remediation agents on the market is to repair soil compaction and reduce the degree of salinization, and does not have the function of reducing heavy metal content. For example, CN107189781A provides a soil remediation composite bacterial agent and its soil remediation method. The cultivation layer of saline-alkali land establishes microbial flora and fundamentally changes the physical and chemical properties of the soil through the cultivation of crops on the ground and the application of bio-organic fertilizers, so as to achieve the control of saline-alkali land, but this invention cannot simultaneously reduce the content of heavy metals

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