Scholarlink

Aims <p>Improving nitrogen use efficiency (NUE) and mitigating nitrogen (N) loss are challenges associated with wheat–maize crop rotation. Existing coated controlled-release and stabilized ureas have related potential, but neither optimize N release/transformation nor match differential N demands of wheat and maize. Integrating them to develop a synergistic coated controlled-release urea (CISCU) is key to improving efficiency and double-crop yields.</p> Methods <p>Three stabilized ureas were prepared by coating urea with N-(n-butyl) thiophosphoric triamide (NBPT, NU), 3,4-dimethylpyrazole phosphate (DMPP, DU), or both (DNU). Four epoxy-resin-coated ureas (CU, CNU, CDU, and CDNU) were then produced by coating urea (U) or the corresponding stabilized ureas. Laboratory experiments evaluated the controlled release performance and impact of seven fertilizers on soil N loss, followed by field experiments to explore their effects on wheat–maize growth, yield, and NUE.</p> Results <p>CDNU effectively synchronized the supply of soil available N with the dynamic N demand of crops throughout the whole growth cycle. Compared with CU, CDNU increased grain yields by 21.51% in wheat and 12.80% in maize, respectively, and improved N fertilizer apparent utilization efficiency by 53.79% and 33.20%, respectively. Economic analysis showed that although the cost of CDNU was 7.46% higher than that of CU, net income from wheat and maize production increased by 32.71% and 19.22%, respectively.</p> Conclusions <p>The coated controlled-release urea possesses dual functions of N slow release and loss inhibition. Through precise regulation of soil N release and transformation, soil N supply is matched to crop demand, improving yield and NUE.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Preparation of resin-coated dual controlled-release urea amended with nitrogen inhibitors and its effects on soil nitrogen supply and crop yield in wheat–maize rotation

  • 期刊论文

  • 发表日期：

    2026年7月21日

查看全文
  • Wenjing Yin,
  • Yaru Ge,
  • Guiyang Sun,
  • Yuanjie Dong

摘要

Aims

Improving nitrogen use efficiency (NUE) and mitigating nitrogen (N) loss are challenges associated with wheat–maize crop rotation. Existing coated controlled-release and stabilized ureas have related potential, but neither optimize N release/transformation nor match differential N demands of wheat and maize. Integrating them to develop a synergistic coated controlled-release urea (CISCU) is key to improving efficiency and double-crop yields.

Methods

Three stabilized ureas were prepared by coating urea with N-(n-butyl) thiophosphoric triamide (NBPT, NU), 3,4-dimethylpyrazole phosphate (DMPP, DU), or both (DNU). Four epoxy-resin-coated ureas (CU, CNU, CDU, and CDNU) were then produced by coating urea (U) or the corresponding stabilized ureas. Laboratory experiments evaluated the controlled release performance and impact of seven fertilizers on soil N loss, followed by field experiments to explore their effects on wheat–maize growth, yield, and NUE.

Results

CDNU effectively synchronized the supply of soil available N with the dynamic N demand of crops throughout the whole growth cycle. Compared with CU, CDNU increased grain yields by 21.51% in wheat and 12.80% in maize, respectively, and improved N fertilizer apparent utilization efficiency by 53.79% and 33.20%, respectively. Economic analysis showed that although the cost of CDNU was 7.46% higher than that of CU, net income from wheat and maize production increased by 32.71% and 19.22%, respectively.

Conclusions

The coated controlled-release urea possesses dual functions of N slow release and loss inhibition. Through precise regulation of soil N release and transformation, soil N supply is matched to crop demand, improving yield and NUE.