Preparation method and application of liquid selenium-rich fertilizer

Abstract

The invention provides a preparation method and application of a liquid selenium-rich fertilizer. The preparation method of the liquid selenium-rich fertilizer comprises the following steps: dissolving sodium selenite in water to form original mother solution, concentration of the sodium selenite being 30-50 g / l; mixing the original mother solution with amino acid solution with a mass concentration of 15%-20%, a volume ratio of the original mother solution to the amino acid solution being 1:(2-3), and shaking and chelating at 35-45 DEG C for 48-72 h to obtain chelate; adding 1-3 g of sodium alkyl benzene sulfonate per liter of the chelate, stirring and secondarily chelating with alcoholic fermentation filtrate at 25-35 DEG C for 36-48 h, the volume ratio of the alcoholic fermentation filtrate to the chelate being 1:(0.8-1.2) to obtain the liquid selenium-rich fertilizer. In the technical scheme of the invention, 90% or more of inorganic selenium is converted into organic selenium such as selenomethionine and selenocystine, toxin and harm risks are eliminated, and materials are saved.

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 liquid selenium-enriched fertilizer. Background technique [0002] Most of the liquid selenium-enriched fertilizers on the market are generally sprayed with selenite or selenite after fermentation or complexing agent. At least two or more sprays are required to achieve the goal of selenium-enriched agricultural products. Production. It mainly has the following weaknesses: first, the residual inorganic selenium is serious, which has a potential risk of poisoning; 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 plant itself; fourth, The workload of multiple spraying is heavy, the labor cost is high, and so on. Contents of the invention [0003] Aiming at the above techni...

AI Technical Summary

Problems solved by technology

It mainly has the following weaknesses: first, the residual inorganic selenium is serious, which has a potential risk of poisoning; 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 plant itself; fourth, The workload of multiple spraying is heavy, the labor cost is high, etc.