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Method for repairing copper-contaminated soil by using hyperaccumulator-sesame

A technology for super-accumulating plants and polluted soil, which is applied in the field of repairing copper-contaminated soil with super-accumulating plants—sesame, which can solve the problems of short individuals, small biomass, and slow growth, and achieve the reduction of heavy metal content and strong enrichment Ability, high application value effect

Inactive Publication Date: 2013-04-10
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

[0004] The object of the present invention is to provide a method for utilizing hyperaccumulator plants—sesame to remediate copper-contaminated soils, to solve the problems existing in the technology of hyperaccumulator plants to remediate copper-contaminated soil slow growth, short individuals, small biomass and other problems, it can bring certain economic value while repairing the soil

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  • Method for repairing copper-contaminated soil by using hyperaccumulator-sesame

Examples

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Embodiment 1

[0016] Example 1 Farmland Soil Remediation Test in Contaminated Mining Areas

[0017] The test site is the farmland polluted by heavy metals in the mining area of ​​Chenzhou, Hunan. The soil of the farmland is the compound polluted soil of Cu, Zn, Pb, Cd and As (the background value of soil heavy metals is shown in Table 1).

[0018] Table 1 Background values ​​of heavy metals in soil Unit: mg / kg

[0019] Cu Zn Pb 122 311 1827

[0020] The specific method is as follows: during June, finely prepare the farmland soil, maintain water and soil moisture, open furrows, waist ditches and surrounding ditches for timely irrigation and drainage, and apply organic fertilizers as base fertilizers. Sesame is sown in a row sowing method, the spacing between plants is well controlled, and the planting is reasonable and dense for seedling management. Topdressing is carried out at the seedling stage, and the seedlings are thinned to a reasonable density, ensuring 8,00...

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Abstract

The invention discloses a method for repairing copper-contaminated soil by using hyperaccumulator-sesame, which aims to solve the problems that in the conventional heavy metal-contaminated soil repairing technology, a plant is low in biomass, low in adaptability, slow in growth, poor in economic benefits, poor in comprehensive practical application effect and the like. The method comprises the following steps: directly planting the sesame into heavy metal-contaminated soil; and cultivating the sesame normally, wherein the sesame can grow normally in the contaminated soil without obvious poisoning symptoms; the oil content of a sesame fruit is not affected; the sesame is short in growth cycle and high in biomass; the content of copper absorbed and accumulated by an aboveground part of the sesame is far higher than a background value of the soil, thus achieving a hyperaccumulation level; and by the method, cultivation and management are simpler, expense is low, and a certain amount of economic income can be obtained while contamination is controlled at the same time.

Description

Technical field [0001] The invention involves the regeneration and utilization technology of farmland pollution soil. Specifically, it is a method that uses super rich plants -sesame to repair copper pollution soil. Background technique [0002] With the continuous progress of industry and agriculture, industrial and agricultural activities bring a large amount of heavy metals to the soil. The heavy metal pollution of the soil has serious, long -term and extensive characteristics, and has become an increasingly serious global environmental issue (Peter ETAl., 2009).Heavy metal pollution can make the heavy metal content in the soil far higher than the natural background value, resulting in the deterioration of ecological environment and the degeneration of soil quality (Chen Huaiman. Environmental soil studies [M]. Beijing: Science Press, 2005.).These heavy metals mainly include lead, zinc, copper, cadmium, chromium, nickel, mercury, and arsenic. Among them, copper is more toxic t...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 曾清如杨洋彭亮廖柏寒彭星陈志鹏
Owner HUNAN AGRICULTURAL UNIV
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