Rice heavy metal absorption blocking agent and use method thereof

Abstract

The invention discloses a rice heavy metal absorption blocking agent and a use method thereof. The blocking agent includes one or more effective components of alpha-ketoglutarate, glycerol and oxaloacetic acid. The aim of preventing heavy metal from being absorbed and transferred to rice can be achieved through leaf surface spraying in the rice tillering period, heading period and / or postulation period. The contents of lead, cadmium and other heavy metal polluting rice in rice fields can be remarkably reduced, and rice produced in rice fields slightly or intermediately polluted by heavy metal meets the food safety standard. The effective spraying concentration of the blocking agent is low, the blocking agent can be sprayed after being mixed with pesticides for preventing and treating rice diseases and pests, and 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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