Application of NaHS as foliage conditioner for preventing and controlling accumulation of cadmium on paddy rice

Abstract

The invention relates to the application of NaHS as a foliage conditioner for preventing and controlling the accumulation of cadmium on paddy rice. The spraying concentration of the NaHS is 40 to 60 mu mol L<-1>. The NaHS is continuously sprayed for five times with once every 7 days at the beginning of a heading stage of the paddy rice. 40 to 60 milliliters of NaHS is sprayed for every potted plant every time, and 70 to 80 milliliters of NaHS is sprayed to every acre of land. The NaSH is dissolved for volume fixation directly by water, and a 0.03 to 0.04 percent V / V solubilizing assistant anhydrous ethanol and a 0.005 to 0.02 percent V / V surfactant are added to prepare the NaSH. The enrichment of cadmium on the paddy rice is controlled by spraying NaSH on foliages, and after the NaSH is sprayed, the content of cadmium on paddy rice grains, rice husks and the upper and lower parts of the ground is remarkably reduced, and the risks of production of cadmium rice are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control and agricultural product quality and safety, and specifically discloses the application of NaHS as a leaf conditioner for preventing and controlling cadmium accumulation in rice. Background technique [0002] Cadmium (Cd) pollution exists widely in the world and is becoming more and more serious. The area of ​​land polluted by cadmium in my country has exceeded 200,000 mu. In April 2011, the State Council approved the "Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution", cadmium was listed as the first category of planning objects, and it was clearly stated that heavy metal pollution control and restoration of agricultural product production areas should be carried out. At the beginning of 2011, some media reported that "10% of rice in my country has cadmium exceeding the standard", which aroused widespread concern among the public abou...

AI Technical Summary

Problems solved by technology

H from NaHS 2 S, Cd and other metals are easy to form CdS and other precipitates, so root application of NaHS cannot be applied in rice production. At the same time, the amount of root application of NaHS is large, the operation is cumbersome, and the cost is high.

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