Preparation method of CuII-containing coordination polymer and research on inhibition effect of CuII-containing coordination polymer on soil urease and nitrifying bacteria

By synthesizing the CuⅡ coordination polymer [Cu(3-bbpa)(5-HIPA)·H2O], the problems of easy leaching and toxic residue of existing copper salt inhibitors have been solved, achieving dual regulation of the urea conversion pathway and improving nitrogen fertilizer utilization and environmental protection.

CN122080423APending Publication Date: 2026-05-26SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202610131784.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-30
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing copper salt inhibitors have problems such as easy leaching, toxic residues, and short duration of action in inhibiting soil urease and nitrifying bacteria, making it difficult to effectively regulate the urea conversion pathway, resulting in low nitrogen fertilizer utilization and high environmental pollution risks.

Method used

Using 3-aminopyridine and fumaric acid to synthesize N1,N4-bis(3-pyridyl)-2-butenamide as ligands, CuⅡ coordination polymer [Cu(3-bbpa)(5-HIPA)·H2O] was synthesized by hydrothermal method to delay the conversion of urea to ammonium nitrogen and nitrate nitrogen, and reduce ammonia volatilization and nitrate leaching.

Benefits of technology

It achieves dual regulation of the urea conversion pathway, prolongs the effective period of nitrogen fertilizer in the soil, improves nitrogen fertilizer utilization, reduces ammonia volatilization and nitrate leaching, reduces the risk of environmental pollution, and achieves dynamic matching between nitrogen supply and crop absorption.

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Abstract

The invention discloses a preparation method of a coordination polymer containing CuII and research on the inhibition effect of the coordination polymer on soil urease and nitrifying bacteria, and relates to the technical field of fertilizer.The preparation method comprises the steps that 3-aminopyridine and fumaric acid serve as raw materials to synthesize N1, N4-bis (3-pyridyl)-2-butenamide, then CuCl2. 2H2O and the synthesized N1, N4-bis (3-pyridyl)-2-butenamide are used for preparing the coordination polymer containing CuII. The novel coordination polymer [Cu (3-bbpa) (5-HIPA). H2O] is synthesized from N, N, N, N ', N'-bis (3-pyridyl)-2-butenamide and 5-hydroxyisophthalic acid by a hydrothermal method, and the crystal structure of the novel coordination polymer [Cu (3-bbpa) (5-HIPA). H2O] is analyzed to research the influence of the novel coordination polymer as an inhibitor on soil urease and nitrifying bacteria. The difunctional inhibitor is studied to delay the conversion process of urea from urea nitrogen to ammonium nitrogen and ammonium nitrogen to nitrate nitrogen, overcomes the defect of single inhibition capability of a traditional inhibitor, is strong in inhibition capability, low in toxicity, low in cost and simple in synthesis method, can effectively improve the utilization rate and stability of the fertilizer urea, and has a wide application prospect. Nitrogen loss in agricultural activities is reduced, the fertilization cost is reduced, and the grain yield is increased.
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