Method for promoting enrichment of cadmium by red spinach through composition of plant hormone and chelating agent

Abstract

The invention discloses a method for promoting enrichment of cadmium by red spinach through composition of a plant hormone and a chelating agent. The method is characterized in that the red spinach is planted in pollutant cadmium-containing soil, and the plant hormone and the chelating agent EDTA are sprayed or irrigated, and when being in the flowering period or the maturation period, the plant red spinach is cut or wholly removed from the polluted soil; then a next batch of the red spinach is further planted, the plant hormone and the chelating agent EDTA are sprayed or irrigated, and when being in the flowering period or the maturation period, the plant red spinach is wholly removed from the polluted soil; the process is repeated until the content of the cadmium in the soil reaches the environmental safety standard. By adopting the method, the absorption, transport and enrichment to the cadmium by the red spinach can be remarkably increased, the phytoremediation efficiency of the cadmium-polluted soil is effectively improved, the method has the characteristics of less investment, low maintenance cost, small work amount and low management technology requirements for repairing of the cadmium-polluted soil, and favorable environmental benefits, social benefits and economic benefits are realized.

Description

technical field [0001] The invention belongs to the control of cadmium pollution and the regeneration of polluted soil, and relates to a method for promoting the enrichment of cadmium in red amaranth by compounding a plant hormone and a chelating agent. It is suitable for using plant hormones (or plant growth regulators) and chelating agents to compound and promote red amaranth to repair cadmium (Cd) polluted soil, thereby repairing and treating polluted soil. Background technique [0002] At present, cadmium (Cd) has been classified as the first carcinogen by the International Agency for Research on Cancer, and Cd is one of the most toxic and most polluting heavy metals. The cadmium content in the soil is 0.01-2mg / kg, which mainly comes from the parent material of the soil. In places where cadmium mineralization occurs and is polluted by industry, the cadmium content in the soil will be more than a hundred times higher than the background value, and some can be as high as t...

AI Technical Summary

Problems solved by technology

Considering the dual needs of restoration efficiency and ecological environmental protection, at present, because regulating the hormone level in the body is an important way for plants to adapt to nuclide and heavy metal stress, the research on plant hormones has gradually become a research hotspot, especially the use of these plant hormones to combat Various adversity environments, especially in the application of heavy metals and radionuclide stress, are of great significance, but there is no literature report on the method of using plant hormones and chelating agents to promote the enrichment of cadmium in red amaranth

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