Large-particle urea coating preparation containing urease inhibitor NBPT and using method

Abstract

The invention discloses a large-particle urea coating preparation containing a urease inhibitor NBPT and a using method. The formula comprises an effective component NBPT, a dispersing agent, a wetting agent, an emulsifying agent, a film-forming agent, a thickening agent, an anti-freezing agent, marking color and water. The mass percent of each component is as follows: 5.0%-30.0% of the effective component NBPT, 3.0%-5.0% of the dispersing agent, 0.5%-5.0% of the wetting agent, 0.2%-2.0% of the emulsifying agent, 0.2%-5.0% of the film-forming agent, 0.5%-1.0% of the thickening agent, 3.0%-5.0% of the anti-freezing agent, a proper amount of the marking color and the balance of the water. According to the invention, the NBPT can be well dispersed; The added preferable additive can obviously improve the effectiveness of the NBPT, so that the dosage is reduced, and the stability of the NBPT is improved; The product can be directly coated on the surface of the large-particle urea by high-pressure spraying. When the product is scientifically applied to soil, the soil urease activity can be effectively inhibited, slow and controlled release of nitrogen is realized, the nitrogen fertilizer utilization rate is increased, the nitrogen fertilizer consumption is reduced, the crop yield is increased, and the environmental pollution risk is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of nitrogen fertilizer synergists, urease inhibitors and coated fertilizers, in particular to a large-grain urea coated preparation containing urease inhibitor NBPT and a use method. Background technique [0002] In recent years, under the guidance of my country's fertilizer reduction policy, my country's nitrogen fertilizer utilization rate has risen from about 25% to about 32%, but it is still far lower than that in Europe and the United States (52% in Europe, 68% in the United States and Canada) and the world average (42%). Unused nitrogen enters the water body and the atmosphere, causing environmental problems such as air and water pollution. Reducing nitrogen fertilizer input and increasing nitrogen use efficiency are effective ways to alleviate this problem. How to regulate the transformation process of nitrogen in soil and improve the nitrogen use efficiency has always been a hot and difficult issue i...

AI Technical Summary

Problems solved by technology

However, in the current research, nitrogen fertilizer synergists such as NBPT and DCD are simply coated on the surface of fertilizers or mixed into the coating material and then coated on the surface of fertilizers, and nitrogen fertilizer synergists have not been made into a mature dosage form. to use, greatly reducing their effectiveness

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