The invention discloses a functional
urea and a preparation method thereof. The functional
urea is made by mixing and granulating common
urea, various
amino acid concentrated solutions, a
plant growth regulator, microelements and a biological
promoter. One of the preparation methods is that the materials are heated to the temperature of 98 DEG C by a pressure pump with a flowmeter in a two-stage normal temperature and normal pressure
evaporator during the production process of the urea, the materials are quantitatively and continuously added in proportion, melted and combined, and granulated in a urea
granulation tower to obtain a product, the product obtained is coated with a liquid anti-
caking agent, cooled and packed, therefore, the functional urea is obtained. The functional urea has the advantages of no
hormone, no
toxicant and no harmful matter, little dosage, fast action, stable
fertilizer efficiency and long-lasting effect. Compared with the conventional urea, the dosage of the functional urea can be reduced by 40-50% (10Kg of base
fertilizer and 5Kg of additional
fertilizer per mu); meanwhile, the functional urea has the functions of regulating PH value of soil, promoting
nutrient absorption of crops, enhancing
crop yield, improving
crop quality, saving energy sources, protecting environment, as well as saving cost and increasing incomes for farmers.