Treatment method for remediation of heavy metal polluted soil by interplanting economic crops and leguminous plants

Abstract

The invention relates to a treatment method for remediation of heavy metal polluted soil by interplanting economic crops and leguminous plants. According to the method, the planted economic crops include sunflowers, corn, broomcorn and oilseed rape, the economic crops are subjected to crop rotation through a conventional cultivation method according to a sunflower-oilseed rape, corn-oilseed rape and broomcorn-oilseed rape mode, and the leguminous plants are interplanted through a conventional cultivation method during sunflower-oilseed rape, corn-oilseed rape and broomcorn-oilseed rape planting periods. The soil is remediated through crop rotation of various crops and the same kind of crops, and the monotonous mode of an existing crop rotation method in which two crops are subjected to crop rotation is broken through. The crop rotation crops are reasonably matched according to the heavy metal pollution problem of the to-be-restored soil, the aim of remediation of the heavy metal polluted soil can be achieved, and meanwhile soil nutrients can be effectively balanced. Meanwhile, the leguminous plants are interplanted to cooperate with remediation to serve as green manure, and it is guaranteed that the remediated soil is high in beneficial component content. By means of the remediation method, considerable economic benefits can be generated while the plants are planted for soil remediation, and double benefits can be achieved.

Description

technical field [0001] The invention relates to the field of phytoremediation of soil, in particular to a treatment method for interplanting leguminous plants of economic crops to remediate heavy metal polluted soil. Background technique [0002] With the continuous deterioration of the ecological environment, industrial or domestic pollution, the problem of soil environmental pollution caused by metals is becoming more and more serious. As a large agricultural country in my country, the arable land environment plays a decisive role. Cultivated land is used as a breeding base for crops. In order to ensure food security, most of the cultivated land is far away from industrial areas and mining areas, so it generally does not produce heavy metal pollution. However, due to improper control of the discharge of domestic wastewater, waste gas, and waste residues, it will still cause medium and light pollution of cultivated land, especially cadmium pollution is more easily absorbed...

AI Technical Summary

Problems solved by technology

The various repair methods mentioned above use the crop rotation of two kinds of crops with the ability to absorb and enrich the soil to repair the soil. The crop rotation form is relatively simple, and it is easy to cause unbalanced soil nutrient consumption.