Copper-contaminated soil conditioner on basis of sulfur-silicon fertilizers, method for screening copper-contaminated soil conditioner and method for applying same

Abstract

The invention discloses a copper-contaminated soil conditioner on the basis of sulfur-silicon fertilizers, a method for screening the copper-contaminated soil conditioner and a method for applying the same. 30 kg / hm<2> of sulfur and 1.0 g / kg soil of sodium silicate are applied in a combined manner, or 0.013 g / kg soil of sulfur and 1.0 g / kg soil of sodium silicate are preferably applied in a combined manner. The copper-contaminated soil conditioner and the methods have the advantages that the sulfur-silicon fertilizers are applied, so that biological enrichment of copper in rice seedlings can be lowered, absorption and accumulation of copper in stems, leaves and brown rice can be reduced, migration and transportation of copper in soil to various organs of rice can be inhibited, and accordingly the hygienic quality of the paddy rice from copper-contaminated farmlands can conform to food safety standards in China; the sulfur and silicon are nutrient elements required by normal growth of the rice, and the environmental stress resistance of plants can be affected by supply conditions of the nutrient elements, namely the sulfur and the silicon; the crop yield of the copper-contaminated farmlands can be increased, the content of heavy metal in agricultural products can be reduced, and accordingly the copper-contaminated soil conditioner and the methods have important theoretical significance and practical value in the aspect of amendment of the copper-contaminated soil.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal remediation, and in particular relates to a sulfur-silicon fertilizer-based copper-contaminated soil improver and a screening method and application method thereof. Background technique [0002] With the rapid development of social economy, the problem of heavy metal pollution in my country's soil is becoming more and more serious. Industrial and mining activities such as heavy metal mining, smelting and processing are important sources of copper pollution in soil, and copper pollution in farmland soil is an important reason for the excessive copper in agricultural products. Therefore, taking effective countermeasures to remediate copper-contaminated soil is conducive to improving the quality of cultivated land and ensuring the quality and safety of agricultural products. Rice is one of the most important food crops in China. It is of great significance to solve the problem of excessive ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a copper-contaminated soil improver based on sulfur-silicon fertilizer and its screening method and application method, aiming to solve the problem that the current measures for soil copper pollution control destroy the soil structure or have a long repair period, which is not suitable for farmland. Soil Remediation Problems

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