Vegetable heavy metal blocking agent and use method thereof

Abstract

The invention discloses a vegetable heavy metal blocking agent and a use method thereof. The effective component of the blocking agent is one of or several of alpha-ketoglutaric acid, glycerol and oxaloacetic acid; the purposes of blocking heavy metal absorption and transferring to edible parts can be realized through foliage spraying from vegetable cultivation to harvesting. According to the vegetable heavy metal blocking agent disclosed by the invention, the contents of lead, cadmium and other heavy metals at the edible parts can be obviously reduced, so that vegetables produced in vegetable fields mildly and moderately polluted by the heavy metals conform to food safety standards. The blocking agent disclosed by the invention is low in effective spraying concentration and can be sprayed after being mixed with pesticides for preventing and treating vegetable diseases and insect pests, thereby being low in cost.

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 vegetable heavy metal absorption barrier 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. Vegetables are one of the necessary foods in people's daily life, and the quality and safety of vegetable baskets have received widespread attention in recent years. According to reports (Jin Huiyong et al., 2015), 30% of the vegetables produced in Beijing had heavy metal content exceeding the standard, and th...

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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