A method of increasing the ability of chicory to remove cadmium from heavy metal polluted soil by using fertilization and mowing technology

Abstract

The invention relates to a method for improving the capability of endives for removing cadmium from heavy-metal-polluted soil by using fertilization and harvesting techniques. The method comprises the following steps: planting the endives into the heavy-metal-polluted soil according to the natural growth period for regular cultivation, harvesting the endives after the endives are matured, and applying fertilizers after harvesting each time to improve the enrichment capability of the endives on the cadmium and fulfill the aim of removing the excessive cadmium from the soil. When the endives grow normally in the cadmium-polluted soil, no obvious poison symptoms occur, so that the yield of the endives is not affected; furthermore, the overground parts of the endives have large biomass, so that the endives can be harvested for multiple times in the growth period to absorb and accumulate a plenty of various metals; particularly, the content of the heavy metals (cadmium) in the plants is obviously higher than the background value of the soil, so that the enrichment level is achieved. The method for cultivation is simpler, and the management cost is low; multiple benefits can be earned from one-time planting; after the endives are simply detoxified, the heavy metals can be prevented from entering a food chain, so that considerable economic income can be obtained when the pollution is treated.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, which is a method for remediating soil heavy metal pollution by using fertilization and mowing technology to increase the ability of economic crop chicory to remove cadmium from heavy metal polluted soil. Background technique [0002] Looking at the current research on the ecological restoration of contaminated soil, it can be seen that although the optimal combination of various methods or measures is the focus of current research on the ecological restoration of contaminated soil, the relevant research is mainly an attempt to combine various restoration methods. Phytoremediation of heavy metal-contaminated soil refers to removing, volatilizing or stabilizing heavy metal pollutants in the soil environment through plant systems and their roots, or reducing the toxicity of heavy metals in pollutants, in order to achieve the goal of removing pollution, repairing or treating s...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is, aiming at the above-mentioned deficiencies in the prior art, provide a kind of method that utilizes fertilization and mowing technology to increase the ability of chicory to remove cadmium in heavy metal-contaminated soil, so as to solve the problem that plants cannot be used repeatedly in the existing heavy metal-contaminated soil remediation technology. Harvesting, seasonal restrictions, slow growth, low aboveground biomass, less total heavy metal absorption and accumulation, no good economic benefits, and little comprehensive effect in practical applications, etc.

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