Method for safe production in cadmium polluted soil by utilizing low cadmium accumulation type celery cabbage

Abstract

The invention relates to technology for safely planting crops in a cadmium polluted soil environment, in particular to a method for safe production in cadmium polluted soil by utilizing a low cadmium accumulation type celery cabbage. The above-ground part of the low cadmium accumulation type celery cabbage can reject the absorption of the cadmium in the cadmium enriched polluted soil, and the root can fix and adsorb the cadmium in the soil, so that the cadmium is prevented from being transferring upward to the above-ground part. The above-ground part of the celery cabbage is safe to be eaten or sold, and the root is carefully treated, so that the safety of the vegetable food is ensured, and the inedible part(the root) can also be used for fixing and adsorbing a large amount of cadmium in the soil; and by repeatedly planting the vegetable, the excessive cadmium in the polluted soil can be continuously removed, and the cadmium content in the edible part of the celery cabbage also meets the standard of the green safe vegetable. The technology has the advantages of low cost, no damage to physical-chemical properties of the soil, no secondary pollution, the realization of the combination of vegetable-planting and cadmium-removal in the polluted soil and the like.

Description

technical field [0001] The present invention relates to crop safety production technology of cadmium-polluted soil environment, specifically a method for safe production of cadmium-contaminated Chinese cabbage in cadmium-contaminated soil, which uses the rejection mechanism of low-accumulation heavy metal cadmium Chinese cabbage, in A safe production method can still be achieved in medium and low levels of cadmium-contaminated soil. Background technique [0002] As early as the end of the 1960s, with the discovery of bone pain disease in Japan, the pollution of soil cadmium and other heavy metals has attracted the attention of various countries. In recent years, with the rapid development of my country's industrial and agricultural production, cadmium pollution in the soil environment of our country has become increasingly serious. Numerous human activities, such as large-scale mining and smelting, electroplating, sewage irrigation and sludge application, and the use of cad...

AI Technical Summary

Problems solved by technology

These physical and chemical treatment technologies have their own advantages. Although they have great effects in the treatment of small-scale polluted soil and serious sudden pollution accidents, and the treatment period is short, there are generally problems such as high price, large engineering volume and easy to cause secondary pollution. It is generally difficult to apply it in the remediation and treatment of large-scale and lightly polluted soil.

[0004] Compared with these traditional treatment technologies, phytoremediation, as an emerging in-situ green restoration technology, has the advantages of low cost, no damage to the environment, and easy acceptance by people, and has gradually become a research and application hotspot in the field of environmental science. 3: Zhou Qixing, Song Yufang. Principles and Methods of Contaminated Soil Remediation [M] Beijing: Science Press, 2004. However, phytoremediation also has the following disadvantages: hyperaccumulated plant biomass is small and has obvious geographical distribution, and the remediation cycle is too long It usually takes hundreds of years, and it is still difficult to be practically promoted at present (Document 4: Liu Weitao, Zhang Yinlong, Chen Zhemin, etc. Absorption and distribution of cadmium and zinc by green trees in mining areas [J]. Journal of Applied Ecology, 2008, 19(4) : 752~756)

Although my country has conducted extensive research on heavy metal pollution in vegetable soil and vegetables, most of them have focused on investigation and sampling analysis or preliminary research on the absorption and enrichment of heavy metals in different vegetables and their mechanisms. There are still few studies on enrichment differences, and there are no reports on genotypes of Chinese cabbage with low accumulation of heavy metals (Document 10: Zhao Xiaohu, Wang Fuhua, Zhang Chong, etc. Heavy metal pollution in southern vegetable fields and control measures for vegetable safety production[J] .Agricultural Environment and Development, 2007, 24(3): 91~94)

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