Preparation method and application of selenium-enriched cadmium-resistant foliar fertilizer special for rice

Abstract

The invention provides a preparation method and application of a selenium-enriched cadmium-resistant foliar fertilizer special for rice .The preparation method of the selenium-enriched cadmium-resistant foliar fertilizer special for the rice comprises the following steps that sodium selenite, zinc sulfate, manganese sulfate and ferrous sulfate are dissolved in water and prepared into an original mother liquid, wherein the concentration of sodium selenite ranges from 30 g / l to 60 g / l; the original mother liquid is mixed with an amino acid solution of which the mass concentration ranges from 15% to 20%, shaking chelating is conducted, and a chelating liquid is obtained; the chelating liquid and a single silicic acid aqueous solution are mixed to be uniform to be prepared into a mixed liquid; sodium alkyl benzene sulfonate is added, the mixture and filtrate obtained through saccharose alcohol fermentation are stirred at 25 DEG C to 35 DEG C for secondary chelating, and the selenium-enriched cadmium-resistant foliar fertilizer special for the rice is obtained .By means of the preparation method and application of the selenium-enriched cadmium-resistant foliar fertilizer special for the rice, 90% or above of inorganic selenium is converted into organic selenium such as selenomethionine and selenocystine, the poisoning risk is eliminated, the absorption conversion rate of selenium is increased, the raw material amount is reduced, the cost is reduced, and the rice has a good cadmium-resistant property.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilization, and in particular relates to a preparation method and application of a special selenium-enriched and cadmium-resistant foliar fertilizer for rice. Background technique [0002] At present, most of the selenium-enriched foliar fertilizers on the market generally use selenite or selenite to be fermented or complexed for multiple foliar sprays. Spray once respectively at the beginning of heading, and generally need to spray more than twice to realize the production of selenium-enriched agricultural products. This method mainly has the following weaknesses: First, the residual inorganic selenium is serious, which has a potential risk of toxicity; second, the conversion rate of selenium in agricultural products is low, and the cost is high; third, the application process of foliar fertilizer has the risk of burning seedlings to the plants themselves; The 4th, repeated spraying work...

AI Technical Summary

Problems solved by technology

This method mainly has the following weaknesses: first, the residual inorganic selenium is serious, which has potential poisoning risks; second, the conversion rate of selenium in agricultural products is low, and the cost is high; third, the application process of foliar fertilizer has the risk of burning seedlings to the plants themselves; Fourth, the workload of multiple spraying is heavy, and the labor cost is high.