Plant composition repair method for severe zinc polluted rice field

Abstract

The invention relates to a plant composition repair method for a severe zinc polluted rice field and belongs to the technical field of heavy metal pollution prevention for soil. The method is characterized in that a plant composition for repairing is prepared from polygonum hydropiper, globose zosasa, monochoria vaginalis, wild rice shoots, alligator alternanthera and echinochloa crusgalli; according to the plant planting method, plants of different kinds and different heights are planted at intervals and spaced by 20 cm; during the plant harvesting period, the harvesting method comprises the steps that 60 days after the plants are planted, when the amount of absorbing and extracting Zn reaches a saturated state, one-time harvesting is carried out, the whole plants are pulled up by the roots, and then centralized treatment is carried out. In area with rice field soil being polluted by Zn severely (the Zn concentration in the soil is 800 mg/kg and is three times the limiting value of the Zn content in the soil for producing edible agricultural products), by means of four rounds of plant repairing of about 240 days, the Zn content in the rice field soil can be repaired to meet the quality standard of the soil for producing the edible agricultural products in China (the Zn concentration in the soil is 250 mg/kg).

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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AI Technical Summary

Benefits of technology

This technology helps restore zinc from contaminated rice fields by treating them over four months or longer periodically during which they are exposed to high levels of environmental stress such as drought conditions. By doing this process, it allows for better management practices on these crops compared to other methods like adding fertility agents alone.

Problems solved by technology

The technical problem addressed in this patented study relates to improving the effectiveness of removing contaminations such as heavy metallics during environmental cleanup operations without damaging beneficial microorganism populations. This would be particularly useful because many other natural products like vegetables may contain significant amounts of heavymetal compounds due to industrial production processes involving mineral fertilizers used industrially. Additionally, overexposures of cadmium into groundwater environments could negatively influence ecologically sensitive communities around affected regions. Overall, developing effective methods for controllably reducing unwanted levels of heavy Metals while maintaining good quality landscapes becomes crucial for promoting sustainable economic benefits associated with reclaimings after removal of heavyMetalls from waste lands containing large quantities of chromophorous metal(Cu).

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