Method for improving restorability of chickweed and malachium aquaticum on cadmium contaminated soil by adopting mixing planting

Abstract

The invention belongs to the technical field of soil heavy metal pollution prevention and control, and provides a method for improving restorability of chickweed and malachium aquaticum on cadmium contaminated soil by adopting mixing planting. The method is that the chickweed, the malachium aquaticum and cleavers are mixed and planted in the soil. According to the method, cadmium absorption of root systems of the chickweed and the malachium aquaticum is improved remarkably, and the restorability of the chickweed and the malachium aquaticum on the cadmium contaminated soil is improved.

Description

Technical field [0001] The invention belongs to the technical field of soil heavy metal pollution prevention and control, relates to the field of phytoremediation of heavy metal contaminated soil, and in particular relates to a method for improving the remediation ability of Chrysanthemum spp. and Stellaria spp. to cadmium-contaminated soil by using mixed species. Background technique [0002] Heavy metal pollution is a common problem in human activities and natural events in recent decades. According to reports, more than 10% of the arable land is polluted by heavy metals, such as cadmium, rubidium, chromium, lead, etc., causing production losses of more than 10 million tons. Cadmium is easily absorbed by the roots of crops and migrates to the seeds, and then enters the human body through the food chain, thus posing a threat to human life and health. Therefore, the remediation of heavy metal contaminated soil has become an urgent problem to be solved in countries all over the w...

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Problems solved by technology

Hei Liang (The effect of interplanting of Sedum sedum and corn on Zn polluted sludge [J]. Environmental Science, 2007, 28(4): 852-858.) found that the use of intercropping of Sedum sedum and superaccumulative plant For remediation of polluted sludge, the concentrations of Zn, Cd, and Cu in corn grains all meet the food hygiene standards, but the concentrations of Zn, Cd in Sedum sedum significantly increased

However, the research results of Wang Jingwen (The effect of intercropping of loofah and Sedum sedum on soil Cd form and Cd absorption of loofah [J]. Journal of Agricultural and Environmental Sciences, 2016, 35(12): 2292-2298.) showed that loofah and Intercropping with Sedum sedatus to a certain extent reduces the fruiting quantity of loofah, and at the same time, there is a risk of increasing the Cd content in the fruit of loofah

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