Method for remediating heavy metal pollution in soil by hybrid corn

Abstract

The invention provides a corn inter-planting method used for restoring heavy metal pollution of soil and belongs to the technical field of restoration of heavy metal pollution of the soil. According to the method, in a farmland polluted by multiple kinds of heavy metal including Cd, Pb, As and Zn, galinsoga parviflora grafted later generations obtained by grafting sedum alfredii stocks and galinsoga parviflora scions, and corn are inter-planted and cultivated to be used for reducing the content of the heavy metal including Cd, Pb, As and Zn in the soil of the farmland, and the inter-planting ratio of the corn to the galinsoga parviflora grafted later generations is 6:1. By the adoption of the method, the effect of reducing the content of the multiple kinds of heavy metal in all parts of the corn is obvious, the ability to accumulate various kinds of heavy metal of the galinsoga parviflora grafted later generations can be improved remarkably, compared with other inter-planting methods,the method makes more remarkable progress, and the method is applicable to agriculture production, and has a good restoring effect on pollution of multiple kinds of heavy metal in the soil and plants.

Description

technical field [0001] The invention belongs to the technical field of remediation of soil heavy metal pollution, and in particular relates to a method for remediating soil heavy metal pollution by mixing corn, in particular to a method for remediating soil heavy metal pollution by mixing corn and progeny of Achyranthes chrysanthemum. Background technique [0002] With the development of the world economy and the increase of population, human activities are becoming more and more frequent, soil, as a natural resource for human survival, is becoming more and more overwhelmed, and its pollution and damage have become increasingly serious. Due to the increasing amount of heavy metal emissions in production activities, soil heavy metal pollution has become an important environmental problem facing human beings. Heavy metal pollution has spread to many parts of the world, causing serious losses to agricultural soil and crops in many countries and regions. At present, my country's...

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Problems solved by technology

[0005] There have been research reports on the method of using mixed species to remediate heavy metal pollution in corn planting soil, but most of them are limited to a single or at most two heavy metal pollution systems, and there are few research reports on complex multi-system heavy metal pollution

On the other hand, since grafting treatment has been studied relatively maturely in plant cultivation, and reports have shown that the technology of plant grafting treatment for farmland pollution remediation will have great application prospects, so further research will be carried out on combining plant grafting with hyperaccumulator plants. A technology for remediation of heavy metal pollution in soil needs further development

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