Preparation method of long-acting polypeptide blended fertilizer

Abstract

Disclosed is a preparation method of a long-acting polypeptide blended fertilizer. The fertilizer is uniformly mixed by 500 parts by weight of urea, 130 parts by weight of monoammonium phosphate, 120 parts by weight of ammonium dihydrogen phosphate, 120 parts by weight of potassium chloride, and 45 parts by weight of light clay. The mixture is prepared into fertilizer particles containing macroelements and having average particle diameter of 2mm-3mm through a pelleting machine. Three parts of polyaspartic acid are dissolved in water, and are uniformly sprayed on the surfaces of the fertilizer particles containing macroelements, and then 42 parts of light clay are used for coating the fertilizer particles to prepare the long-acting polypeptide blended fertilizer. The invention has advantages that: the production technology is simple; light clay is taken as a coating agent, is sprayed on the surfaces of the fertilizer particles, and has a function of controlling releasing of the fertilizer, so that a fertilizer effect can be effectively developed; polyaspartic acid can prompt root growth; absorptivity of nutrients by crops is improved; the utilization rate of marcoelements of nitrogen, phosphor, and potassium by the crops is increased more than 30%; and soil hardening is reduced.

Description

technical field [0001] The invention relates to a preparation method of polypeptide long-acting blended fertilizer. Background technique [0002] Fertilizer can effectively increase the yield of crops and is one of the essential material bases in agricultural production. At present, when nitrogen, phosphorus, and potassium fertilizers are applied, an average of about 40% is lost due to factors such as volatilization, leaching, and runoff. The lost fertilizers are chemically fixed in the soil, polluting surface and groundwater, and causing soil compaction. Studies have shown that slow and controlled release fertilizers can improve the utilization efficiency of fertilizer nutrients. [0003] Polyaspartic acid is a polymer obtained by dehydrating the amino and carboxyl condensation reactions of aspartic acid monomers. Its biggest feature is that it is biodegradable, non-toxic, and harmless to the environment, so it is called a "green" chemical. Contents of the invention [...

AI Technical Summary

Problems solved by technology

At present, when nitrogen, phosphorus, and potassium fertilizers are applied, the average loss is about 40% due to factors such as volatilization, leaching, and runoff. The lost fertilizers are chemically fixed in the soil, polluting the surface and groundwater, resulting in soil compaction