Cadmium-reducing agent for corns

Abstract

The invention relates to a cadmium-reducing agent for corns. The cadmium-reducing agent is prepared by crushing and mixing cadmium-reducing components, an adhesive, a pigment and an auxiliary agent, wherein the cadmium-reducing components are calcium acetate and zinc chloride, the adhesive is carboxymethyl starch, the pigment is basic malachite green, and the auxiliary agent is sepiolite. The cadmium-reducing agent provided by the invention is applicable to the leaf surface spraying of corns planted in soil polluted by cadmium, and reduces the cadmium content of corn kernels. According to theinvention, the cadmium-reducing agent is mixed with water according to the mass ratio of 1:(155-175) to prepare a suspension, leaf surface spraying is respectively carried out once in the tasseling stage, the silking stage and the early mature stage of the corns, and the cadmium content of the corn kernels is reduced by 40.3-60.8%. The cadmium-reducing agent provided by the invention does not influence normal growth of the corns, and has no adverse effect on the soil environment quality. The cadmium-reducing agent has the advantages of simple and convenient production, low cost and convenientuse, and can effectively reduce the cadmium content of corn kernels, and the economic benefit, the social benefit and the ecological benefit are significant.

Description

technical field [0001] The invention relates to a corn cadmium-reducing agent used for foliar spraying treatment of corn planted in cadmium-contaminated soil and reducing the cadmium content of corn grains, and belongs to the fields of heavy metal pollution control technology in cultivated land and corn cultivation technology. Specifically, it is a cadmium-reducing agent for corn, which is prepared by crushing and mixing cadmium-reducing ingredients, binders, pigments and additives. Cadmium content. Background technique [0002] Cadmium is a toxic metal element. After entering the human body, it can gradually accumulate in the liver, kidney, bone, lung and other systems, causing damage to these systems. Symptoms of chronic cadmium poisoning include loss of sense of smell, fatigue, and decreased hemoglobin. Severe poisoning can lead to "bone pain disease" and even death due to complications. Among the 12 hazardous substances proposed by the United Nations Environment Progra...

AI Technical Summary

Problems solved by technology

The chemical passivation method to control the accumulation of cadmium in corn grains by adjusting the soil Eh or pH through soil application of lime and other methods to reduce the bioavailability of cadmium in the soil, although the effect is quick and the effect is obvious, the dosage is too large and the cost is too high , and will have a negative impact on soil quality, making it difficult to promote on a large scale