A rice heavy metal absorption blocker and its application method

Abstract

The invention discloses a rice cadmium and lead absorption blocking agent and its application method, wherein the active ingredient of the blocking agent is one or more of α-ketoglutaric acid, glycerol, and oxaloacetic acid, which can be used in rice tillering The purpose of blocking heavy metal absorption and transfer to rice can be achieved by foliar spraying at the early stage, heading stage and (or) filling stage. The invention can significantly reduce the content of heavy metals in paddy fields polluted by heavy metals such as lead and cadmium, so that the rice produced in paddy fields polluted by light or moderate heavy metals meets food safety standards. The effective spraying concentration of the barrier agent of the present invention is low, and can be sprayed after being mixed with the pesticide for preventing and controlling rice diseases and insect pests, and the cost is low.

Description

technical field [0001] The invention belongs to the field of prevention and control of heavy metal polluted farmland, and in particular relates to a rice heavy metal absorption blocking agent and a use method thereof. Background technique [0002] The area of ​​cultivated land polluted by heavy metals in my country is nearly 20 million hectares, accounting for about 1 / 5 of the total cultivated land area, resulting in an annual reduction of more than 10 million tons of grain, more than 12 million tons of contaminated grain, and a total economic loss of at least 20 billion yuan. Soil heavy metal pollution has become a major obstacle to my country's sustainable development. Rice is a crop that absorbs cadmium and its grains accumulate very strongly. The research of Wu Qitang et al. (1999) also showed that when the growth of rice was not affected, the cadmium content in brown rice exceeded the hygienic standard by several times or even ten times. Zhen Yanhong et al. (2008) evalu...

AI Technical Summary

Problems solved by technology

To achieve the purpose of effectively passivating soil heavy metals, the amount of passivating agent is generally large, which has a great impact on the soil structure and physical and chemical properties, often leading to a decrease in the yield of cultivated land, and the farmers' income will be greatly affected

In addition, there are phytoremediation methods (CN102500614A, CN101941018B, CN102172608B, CN102172611B, CN104858226A, CN103109651A), but for China where cultivated land resources are scarce, the necessary conditions for large-scale promotion and application are not yet available

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