Method for promoting accumulation of heavy metal cadmium at roots of rice by aid of 5-aminolevulinic acid and rice plants prepared by aid of method

Abstract

The invention provides a method for promoting accumulation of heavy metal cadmium at roots of rice by the aid of 5-aminolevulinic acid and rice plants prepared by the aid of the method, and belongs to the field of technologies for treating heavy metal contamination. The method includes planting the rice in cadmium-contaminated soil; carrying out spray application treatment on leaf surfaces of the rice by the aid of 5-aminolevulinic acid solution with the concentration of 180-220 mg/L in planting procedures. The accumulation of heavy metal cadmium elements at the roots of the rice can be obviously promoted after the spray application treatment is carried out on the leaf surfaces of the rice, and accumulation of cadmium in brown rice of the rice can be inhibited. The method and the rice plants have the advantages that the method is easy and convenient to implement and low in cost, is environmentally friendly and can bring convenience for recycling the cadmium elements, and the problems of high cost, complicated operation, requirements on special instruments and long remediation cycles of existing methods for remedying existing cadmium-contaminated soil can be effectively solved; the rice is a conventional crop, field management on the rice is carried out by the aid of agricultural conventional processes, accordingly, the operation difficulty of the method for remedying the soil can be lowered, and the like.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution control, in particular to a method for promoting accumulation of heavy metal cadmium in rice roots by using 5-aminolevulinic acid and rice plants prepared therefrom. Background technique [0002] Heavy metal pollution in the environment has the characteristics of concealment, long-term and irreversibility. The pollutants have poor mobility in the medium, long residence time, cannot be degraded by microorganisms, and can also be transmitted through the food chain, eventually affecting human health. With the huge emergence and development of my country's industrial and agricultural activities after the reform and opening up, the heavy metal pollution in farmland has continued to intensify, and heavy metal pollution incidents have also occurred frequently. Heavy metals such as cadmium have caused pollution to farmland ecosystems such as rice fields, wheat fields, and corn fields. , heavy...

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Problems solved by technology

[0005] Therefore, a method to promote the accumulation of heavy metal cadmium in rice roots is studied. This method has the advantages of simple operation, environmental friendliness, low price and convenient recycling of cadmium. At the same time, it can inhibit the accumulation of cadmium in rice brown rice. While rice and brown rice meet the national edible standards (the highest limit standard for heavy metal cadmium content in brown rice is 0.2mg / kg in China), it can effectively alleviate the existing cadmium-contaminated soil restoration methods, which are expensive, complicated to operate, and require special instruments and It is very necessary and urgent to repair the problem with a long period of time

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