Efficient and stable liquid urease inhibitor as well as preparation method and application thereof

A highly efficient and stable liquid urease inhibitor was prepared by using a synergistic formulation system of active ingredients, organic solvents, surfactants and acidifiers. This solved the stability and compatibility issues of liquid urease inhibitors and achieved a significant improvement in urea nitrogen utilization and a reduction in ammonia volatilization.

CN122404070APending Publication Date: 2026-07-17NANJING XINYI SYNTHETIC TECH CO LTD
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Patent Information

Application Number
CN202610721095.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing liquid urease inhibitors suffer from poor stability, easy decomposition, and poor compatibility with fertilizers, resulting in low urea nitrogen utilization and significant ammonia volatilization loss. Furthermore, existing solid formulations are inconvenient to use.

Method used

A highly efficient and stable liquid urease inhibitor was prepared by using a synergistic formulation system of active ingredients, organic solvents, surfactants, stabilizers and acidifiers, and controlling the pH value within a weakly acidic range of 3.0 to 5.5.

Benefits of technology

It significantly inhibits soil urease activity, delays urea hydrolysis, reduces ammonia volatilization loss by 40% to 60%, increases urea nitrogen utilization rate by 15 percentage points, and has an effective component decomposition rate of less than 5% after 2 years of storage at room temperature. It also exhibits good stability when mixed with liquid fertilizer.

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Abstract

The invention belongs to the technical field of urease inhibitors, and particularly relates to an efficient and stable liquid urease inhibitor which comprises the following components in parts by mass based on 100 parts of the total mass: 5-30 parts of an active component, 30-60 parts of an organic solvent, 5-20 parts of a surfactant, 0.5-5 parts of a stabilizer and the balance of an acidifying agent, the pH value of the liquid urease inhibitor is stabilized in a range of 3.0-5.5. According to the liquid urease inhibitor, a five-component synergistic formula system of the active components, the organic solvent, the surfactant, the stabilizer and the acidifying agent is adopted, and the pH value is stabilized in a weakly acidic range of 3.0-5.5, so that the technical problems that an existing liquid urease inhibitor is unstable in storage, easy to decompose and poor in fertilizer compatibility are solved. The effective component decomposition rate of the obtained product stored for 2 years at normal temperature is lower than 5%, the effective component loss rate is lower than 3% after the product is mixed with a common liquid fertilizer for 30 days, the soil urease activity can be remarkably inhibited, the urea hydrolysis peak is delayed by 5-7 days, the ammonia volatilization accumulated loss amount is reduced by 40-60%, and the crop nitrogen fertilizer utilization rate is improved by more than 15%.
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