Preparation method and application of special rice selenium-enriched leaf fertilizer

Abstract

The invention provides a preparation method and an application of a special rice selenium-enriched leaf fertilizer. The preparation method of the special rice selenium-enriched leaf fertilizer comprises the following steps: dissolving sodium selenite into water to prepare a primary mother solution, wherein the concentration of sodium selenite is 25 to 50g / l; mixing the primary mother solution with an amino acid solution, wherein the mass concentration of the amino acid solution is 15% to 20%; then vibrating and chelating at the temperature of 35 to 45 DEG C for 48 to 60 hours to obtain a chelation solution; evenly mixing the chelation solution and an aqueous solution of a mono-silicic acid to prepare a mixed solution; adding 1 to 3g of sodium alkyl benzene sulfonate into each liter of the mixed solution, then stirring with an alcoholic fermentation filtrate at the temperature of 25 to 35 DEG C, and performing secondary chelation for 36 to 48 hours, so as to obtain the special rice selenium-enriched leaf fertilizer. With the adoption of the technical scheme of the preparation method, 90% or more of inorganic-form selenium is converted into organic-form selenium in selenomethionine, selenocystine and the like, the risk of poison is eliminated, the absorption and conversion rate of the selenium is increased, the use amount of the sodium selenite is reduced, and the cost is lowered.

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-purpose selenium-enriched foliar fertilizer for rice. Background technique [0002] At present, most selenium-enriched foliar fertilizers for rice on the market generally use selenite or selenite after fermentation or complexing agent mixing to spray the leaves several times. It is sprayed once at the beginning of earing stage, and generally needs to be sprayed twice or more 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, repeat...

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.