Combined application of zinc-selenium agricultural preparation and soil heavy metal repairing agent

Abstract

The invention provides combined application of an agricultural preparation containing zinc-selenium and a soil heavy metal repairing agent. The soil heavy metal repairing agent comprises lentinan and chitosan. With the combined application, the effect of the soil heavy metal repairing agent is enhanced while the plane yield is improved, and the content of heavy metal, such as cadmium, in plants (especially in plant seeds) is obviously reduced.

Description

technical field [0001] The invention belongs to the field of pollutant treatment and the field of agricultural compositions. Specifically, the invention relates to the joint application of zinc-selenium agricultural preparations and soil heavy metal remediation agents. Background technique [0002] In recent years, the problem of heavy metal pollution in my country's soil has become increasingly prominent, posing a serious threat to the ecological environment, food safety and human health, which cannot be ignored. Waste gas, waste water, and waste residues discharged from industries such as dyestuffs, chemicals, tanning, mineral mining, smelting, and processing contain a large amount of heavy metals. Into the soil through other methods, resulting in an increase in the content of heavy metals in the soil, especially the exchangeable heavy metals, which are directly absorbed and enriched by crops, directly threatening human health. [0003] At present, the soil is repaired by...

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Problems solved by technology

[0005] Chinese patent 200910115020 discloses a soil remediation method. By digging a liquid injection well and building a reaction wall, the chitosan eluent is injected into the soil. However, the inventors found that this method has a large amount of engineering, is inconvenient to apply, and is difficult to popularize. ;

[0006] Chinese patent 201110413145 discloses a method for remediating heavy metal cadmium-contaminated soil, using cadmium-resistant tobacco varieties, chitosan solution and microorganisms that activate heavy metal cadmium in the soil to work together, but its application is narrow and difficult to repeat;

And prior art, as Chinese patent 200410009345, 200410084878, 200610086308 and 200910213516 etc., all are basically to make the content of zinc and / or selenium increase in the plant, do not have any enlightenment of combined use with soil heavy metal remediation agent

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