Remediation method for heavy metal cadmium pollution of orchard soil based on galinsoga parviflora

Abstract

The invention discloses a remediation method for heavy metal cadmium pollution of orchard soil based on galinsoga parviflora. The remediation method comprises the following steps: preparing galinsoga parviflora seedlings in a direct transplanting mode or a direct seeding mode; watering to guarantee the water-holding capacity of soil in a field and performing daily management on the galinsoga parviflora; performing harvesting treatment, i.e., harvesting the aboveground part of the galinsoga parviflora. The galinsoga parviflora has resistance and hyperaccumulation feature to cadmium heavy metal, the seedlings absorb and accumulate the cadmium heavy metal in the contaminated soil of the orchard, and the cadmium is transferred to the aboveground part to reduce the cadmium content in the orchard soil, so that the purpose of reducing the cadmium content in the contaminated soil of the orchard is achieved. In addition, the galinsoga parviflora has strong reproductive capacity, grows quickly and is shade-tolerant, the base part has strong branching capacity and can sprout after being harvested; the galinsoga parviflora can be planted almost all the year round in southern China and can grow in extremely barren land, the cost is low, the operability is high, and a new plant genetic resource is developed for phytoremediation of the heavy metal cadmium contaminated orchard soil.

Description

technical field [0001] The invention belongs to the field of remediation of environmental heavy metal pollution, and in particular relates to a method for remediating heavy metal cadmium pollution in orchard soil based on Achyranthes chrysanthemum. Background technique [0002] With the development of society and economy, the area of ​​heavy metal pollution in farmland soil is expanding, and the degree of pollution is also increasing. The heavy metal pollution in cultivated land soil mainly comes from the discharge of industrial "three wastes", the pollution of domestic sewage and garbage, and the unreasonable use of pesticides and fertilizers containing heavy metals. According to the latest survey, the area of ​​cultivated land polluted by heavy metals in my country has reached 20 million hectares, accounting for 1 / 6 of the total area of ​​cultivated land in the country. Therefore, it is imminent to control the heavy metal pollution of cultivated land. Cadmium (Cd), one o...

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Problems solved by technology

[0007] The purpose of the embodiment of the present invention is to provide a method for repairing heavy metal cadmium pollution in orchard soil based

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