Rice cadmium-reducing and yield-increasing agent and production method thereof

Abstract

The invention discloses a rice cadmium-reducing and yield-increasing agent. The rice cadmium-reducing and yield-increasing agent is mainly produced by mixing the following components: a component A which is one of or a composition of any two of cyclodextrin and derivatives of the cyclodextrin, a component B which is one of or a composition of any two of zinc sulfate, manganese sulfate, ferrous sulfate and copper sulfate, and a component C which is one of or a composition of any two of dialkyl dithiophosphates; and the mass fractions of the component A, the component B and the component C in the rice cadmium-reducing and yield-increasing agent are 1%-90%, 1%-90% and 1%-98% correspondingly. The invention further provides a production method of the rice cadmium-reducing and yield-increasing agent. The rice cadmium-reducing and yield-increasing agent is small in using amount, treatment is rapid, easy, convenient and not limited by the site, the concentration and the like, long-distance automatic spraying control by an unmanned aircraft can be further achieved, and the rice cadmium-reducing and yield-increasing agent is especially suitable for cadmium-standard-exceeding treatment of rice and emergency treatment of complex heavy metal pollution accidents in case of emergencies and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of agricultural environmental protection and restoration, and more specifically relates to a cadmium-reducing agent for increasing rice production, and also relates to a preparation method of a micro-fertilizer for reducing cadmium content in paddy fields with excessive cadmium, which is suitable for heavy metal-polluted areas Especially rice production in cadmium polluted areas. Background technique [0002] Cadmium ions in soil are the main source of cadmium in rice. Cadmium pollution is an important factor threatening rice safety. With the expansion of the scale of mining and smelting industries, the area of ​​soil pollution in my country is gradually expanding, and the degree of pollution is gradually increasing. In 2010, the area of ​​land polluted by heavy metals such as cadmium, arsenic, chromium, and lead in my country was nearly 20 million hectares, accounting for about one-fifth of the total cult...

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Problems solved by technology

The soil improver method has the advantages of small investment and quick results, but there is also the risk that the improver will cause secondary pollution to the soil and destroy the ecological balance of the soil itself

3. Phytoremediation method: Phytoremediation technology is an emerging soil remediation method in recent years. Using plants to remove heavy metal pollution in the soil, it is hoped to use super-accumulated plants to absorb heavy metal elements in the soil and purify the soil. Compared with the soil improver method, phytoremediation It has the advantages of safety, environmental protection and low investment, but the phytoremediation cycle is long, and it is difficult for repaired plants to generate economic value to replace food crops

Because the selected low-cadmium-accumulating rice is limited by regional adaptability and yield, these varieties have not been widely promoted

4. Processing of cadmium-contaminated rice: Using cadmium-contaminated rice to enter the food chain will threaten the health of consumers, and simply discarding it will cause secondary pollution to the environment. To develop the technology for processing and utilizing cadmium-contaminated rice, we must first determine where and how cadmium exists in rice .Due to the lack of research on the chelate structure of cadmium and protein, there is no method that can effectively remove cadmium in rice

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