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Method for treating cadmium containing soil by utilizing low-accumulation cadmium crops

A low-accumulation, crop technology, applied in land preparation methods, applications, agricultural machinery and implements, etc., can solve problems such as long repair time, secondary pollution, and large environmental impact, and achieve low treatment costs, no re-pollution, and reduced The effect of absorption and accumulation

Inactive Publication Date: 2017-07-14
湖南省作物研究所
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for utilizing low-accumulation cadmium crops to control cadmium-containing soil, to solve the problem of soil utilization in cadmium-contaminated areas and the existing soil cadmium-polluted area treatment technology with high cost, long repair time, large impact on the environment, There is a problem of secondary pollution

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Embodiment Construction

[0018] The present invention will be described in detail below in combination with specific embodiments.

[0019] Method of the present invention is:

[0020] 1. Select sweet potato varieties with low cadmium absorption, high tolerance and high yield from sweet potato varieties at home and abroad;

[0021] 6 sweet potato varieties with low cadmium absorption were selected from the varieties that showed strong tolerance and stable yield when planted in the cadmium-contaminated soil treatment area, including sweet potato Xiangshu No. 20, Xiangshu 09-8, Xiangshu 7-2, and Xiangshu 11 -25 Xushu 22 and Ningzi 1 have the lowest absorption value and hardly accumulate heavy metal cadmium. As the main varieties of crops in cadmium-polluted areas, the content of Fushu 10 potato cubes is the critical value of the national standard and is not used. Table 1 shows the cadmium content in potato tubers of selected sweet potato varieties.

[0022] Table 1

[0023]

[0024] 2 Apply differe...

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Abstract

The invention discloses a method for treating cadmium containing soil by utilizing low-accumulation cadmium crops. The method comprises the following steps: selecting a sweet potato variety with low cadmium absorption, high tolerance and high yield; applying lime and a ZH-type soil conditioner, adjusting the pH value and the like of soil, and restoring the soil in a polluted area; performing a mode of intercropping corn and sweet potato, and guaranteeing growth and yield of the sweet potato by adopting a special sweet potato standardized cultivation technology; and after harvesting of spring cropping and autumn cropping, performing autumn planting of the sweet potato so as to guarantee adequate yield and full utilization of land. The invention has the following beneficial effects: absorption and accumulation of crops in a cadmium polluted area to cadmium metal are reduced; the cost of treatment is low; and no secondary pollution occurs.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal pollution in soil environment, and relates to a method for treating cadmium-containing soil by utilizing low-accumulation cadmium crops. Background technique [0002] Heavy metal cadmium is one of the heavy metal elements polluted by heavy metals in the soil environment. Excessive cadmium content in the soil will not only cause damage to vegetation, etc., but will also be enriched and transmitted through the food chain, and finally ingested into the human body. Therefore, the control of cadmium-contaminated soil is of great significance in the field of environmental protection. [0003] There are physical remediation, chemical remediation and biological remediation methods for soil cadmium pollution control. Physical restoration and chemical restoration have problems such as high cost, great impact on the environment, complicated operation, and the risk of secondary pollution. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 张超凡张道微周虹黄艳岚张亚
Owner 湖南省作物研究所
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