Method of producing while recovering for cadmium-polluted vegetable field

Abstract

The invention relates to a method of plant recovering and agriculture safe utilization for cadmium-polluted vegetable field soil, in particular to a method of producing while repairing for a cadmium-polluted vegetable field. The method comprises planting green Chinese onions with low cadmium accumulation and cadmium-hyperaccumulator plants of nightshade in an intercropping mode on the cadmium-polluted soil, and after the green Chinese onions with low cadmium accumulation and the cadmium-hyperaccumulator plants of nightshade are fully grown, respectively removing the entire plants from the cadmium-polluted soil so as to achieve the aim of removing a pollutant of cadmium in the soil and simultaneously harvesting the green Chinese onions with low cadmium accumulation to serve as pollution-free vegetables. The harvested green Chinese onions meet the requirements of our country for food sanitation so as to be safely consumed. By means of the steps, a recovering and utilizing period is completed. According to the method of producing while recovering for the cadmium-polluted vegetable field, large amount of cadmium is taken away from the cadmium-polluted soil by utilizing the cadmium-hyperaccumulator plants, the polluted soil is recovered while the green Chinese onions meeting the sanitation standards of our country are produced, and the polluted soil can be safely utilized.

Description

technical field [0001] The invention relates to a method for phytoremediation and agricultural safety of cadmium-contaminated vegetable field soil, in particular to a method for repairing cadmium-contaminated vegetable field while producing. Background technique [0002] According to the 1997 Bulletin on the State of the Environment in my country, there are more than 10 million hm of arable land in my country 2 Subject to different degrees of re-pollution, its area accounts for about 7.34% of the cultivated land area in that year. 300,000 hm across the country in 2000 2 The sampling survey of harmful heavy metals in the soil of basic farmland protection areas showed that the rate of heavy metals exceeding the standard reached 12.1%; 891 agricultural environmental pollution accidents occurred in 23 provinces (municipalities), polluting 40,000 hm2 of farmland 2 , The direct economic loss amounted to 220 million yuan, seriously restricting the development of the national econ...

AI Technical Summary

Problems solved by technology

However, looking at the various remediation methods of farmland polluted soil, although phytoremediation shows a bright prospect, as far as my country's national conditions are concerned, these heavy metal-contaminated soils are taken out for remediation or discarded or all of them are used for other purposes. food production is unrealistic

A better way is to use hyperaccumulator plants to remediate polluted soil, and at the same time to plant low-accumulative crops in an appropriate way, which can not only improve the quality of polluted soil, but also ensure food safety. "Technology undoubtedly has more practical significance, and the resulting ecological and social benefits are immeasurable

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