Agricultural safety production operating method by utilizing low cadmium-accumulation Chinese cabbage

Abstract

The invention relates to the crop safety production technology of cadmium pollution soil environment, in particular to a method by utilizing low cadmium-accumulation Chinese cabbage breed-beijing new No.3 to carry out safety production in the cadmium pollution soil; the low cadmium-accumulation Chinese cabbage is planted in the cadmium pollution soil, the cadmium enriched in the pollution soil is adsorbed by the upper part of the low cadmium-accumulation Chinese cabbage in a repelling way, the root part is used for adsorbing the cadmium in the soil fixedly, so as to prevent the cadmium from being transferred to the overground part upwards; the Chinese cabbage at the overground part is taken as safety vegetables for eating or selling, the root part is treated properly, so as to ensure the vegetable food safety and utilize the non-edible parts (root parts) to fixedly adsorb a great amount of cadmium in the soil; by repeatedly planting the vegetable crops, the processes are repeated, the excessive cadmium in the pollution soil can be extracted continuously, and the cadmium content at the edible part of the Chinese cabbage meets the no-polluted safety vegetable standard; the method has the advantages of low expense, not damaging the physicochemical property of the soil, no secondary pollution, and production and treatment in the polluted soil at the same time.

Description

technical field [0001] The present invention relates to the safe production technology of crops in 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-accumulated 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] In recent years, with the rapid development of my country's industrial and agricultural production, the pollution of cadmium (cadmium) in my country's soil environment has become increasingly serious. Numerous human activities, such as large-scale mining and smelting, electroplating, sewage irrigation and sludge application, and the use of cadmium-containing pesticides and fertilizers, have released a large amount of cadmium into the environment, causing extensive and serious soil cadmium pollution [Document 1: ...

AI Technical Summary

Problems solved by technology

These methods have the following disadvantages: (1) the cost is high, and one hectare of heavy metal-contaminated land is often as high as tens of millions of dollars, and it is difficult to use on a large scale; (2) the soil ecological environment is destroyed, resulting in loss of soil structure, soil biological activity and The degradation of soil fertility often requires secondary treatment; (3) secondary pollution, the process of using physical and chemical methods to restore heavy metal-contaminated soil often results in re-pollution of the soil

However, phytoremediation also has the following obvious shortcomings and deficiencies: (1) The biomass of hyperaccumulative plants is small and has obvious geographical distribution; (2) The remediation period is too long, usually hundreds of years; (3) The depth of phytoremediation of polluted soil Limited, only remediates soil to the depth of plant roots

However, there are still few studies on vegetable varieties with low accumulation of heavy metals, and Chinese cabbage varieties with low accumulation of cadmium have not been reported.

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