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<p>Urea is the most used nitrogen (N) fertilizer in rice fields. After fertilization, urea hydrolysis induces significant N losses by ammonia (NH<sub>3</sub>) volatilization. This demands NH<sub>3</sub> mitigation measures such as the application of urease inhibitors. In this context, Duromide is a new urease inhibitor for urea treatment and represents an alternative to the more commonly used inhibitor N-(n-Butyl) thiophosphoric triamide (NBPT). However, an assessment of Duromide’s effectiveness in reducing NH<sub>3</sub> losses, increasing N use efficiency, and promoting crop yield is lacking for lowland soils cultivated with irrigated rice. Thus, this study aimed to evaluate N fertilization with urea, urea+NBPT, and urea+Duromide under a 10-day irrigation delay for irrigated rice cropping. The experiment consisted of a 3 × 2 factorial, where factor 1 included the N fertilizers urea, urea+NBPT, and urea+Duromide, and factor 2 comprised two N rates equivalent to 100 and 150 kg N ha<sup>-1</sup>. In addition, a control treatment without N fertilization was implemented. The experiment was conducted in the 2019/20, 2020/21, and 2021/22 crop seasons in an Albaqualf with low organic matter content. The accumulated NH<sub>3</sub> losses were 39% lower in urea+Duromide than in urea, while urea+Duromide and urea+NBPT showed similar values. In addition, using urea+Duromide increased the chlorophyll index relative to urea and urea+NBPT. Similarly, considering average values over three crop seasons, urea+Duromide increased grain yield by 7.3 and 8.8% relative to urea+NBPT and urea, respectively. In conclusion, urea+Duromide is more effective than urea+NBPT in increasing the yield of rice subject to irrigation delay in a lowland soil.</p>

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New generation urease inhibitor Duromide reduces ammonia losses and increases irrigated rice yield

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Filipe Selau Carlos,
  • Cristiano Weinert,
  • Rogério Oliveira de Sousa,
  • Verônica Vargas Lemos,
  • Pablo Lacerda Ribeiro,
  • Ezequiel Helbig Pasa,
  • Robson Bosa dos Reis,
  • Ruan Borges Silveira,
  • Jaqueline Pereira Machado de Oliveira,
  • Cacio Luiz Boechat,
  • Robson Andreazza

摘要

Urea is the most used nitrogen (N) fertilizer in rice fields. After fertilization, urea hydrolysis induces significant N losses by ammonia (NH3) volatilization. This demands NH3 mitigation measures such as the application of urease inhibitors. In this context, Duromide is a new urease inhibitor for urea treatment and represents an alternative to the more commonly used inhibitor N-(n-Butyl) thiophosphoric triamide (NBPT). However, an assessment of Duromide’s effectiveness in reducing NH3 losses, increasing N use efficiency, and promoting crop yield is lacking for lowland soils cultivated with irrigated rice. Thus, this study aimed to evaluate N fertilization with urea, urea+NBPT, and urea+Duromide under a 10-day irrigation delay for irrigated rice cropping. The experiment consisted of a 3 × 2 factorial, where factor 1 included the N fertilizers urea, urea+NBPT, and urea+Duromide, and factor 2 comprised two N rates equivalent to 100 and 150 kg N ha-1. In addition, a control treatment without N fertilization was implemented. The experiment was conducted in the 2019/20, 2020/21, and 2021/22 crop seasons in an Albaqualf with low organic matter content. The accumulated NH3 losses were 39% lower in urea+Duromide than in urea, while urea+Duromide and urea+NBPT showed similar values. In addition, using urea+Duromide increased the chlorophyll index relative to urea and urea+NBPT. Similarly, considering average values over three crop seasons, urea+Duromide increased grain yield by 7.3 and 8.8% relative to urea+NBPT and urea, respectively. In conclusion, urea+Duromide is more effective than urea+NBPT in increasing the yield of rice subject to irrigation delay in a lowland soil.