Dual inhibitors for mitigating greenhouse gas emissions and ammonia volatilization in rice for enhancing environmental sustainability

Ankita Paul, Arti Bhatia, Ritu Tomer, Vinod Kumar, Shikha Sharma, Ruchita Pal, Usha Mina, Rajesh Kumar, K. M. Manjaiah, Bidisha Chakrabarti, Niveta Jain, Y. S. Shivay

Research output: Contribution to journalArticlepeer-review

Abstract

The use of inhibitors retain nitrogen as ammonium in soil, giving plants ample time for its uptake. This can reduce nitrous oxide (N2O) emissions, but extended retention may increase ammonia (NH3) volatilization. This study assessed the efficacy of coated urea fertilizers in reducing greenhouse gas (GHG) emissions and NH3 volatilization in rice fields. A field experiment with Pusa 44 rice in the kharif seasons of 2019 and 2020 compared unfertilized control (No N), prilled urea (PU), nitrification inhibitors (NIs): neem oil-coated urea (NCU), karanj oil-coated urea, and dual inhibitor (DI: Limus + NCU). The coated urea fertilizers were analysed with scanning electron microscopy, fourier transform infrared spectrometry, and energy-dispersive spectroscopy. Compared to PU, DI reduced N2O emissions by 23.7%, methane by 11.9%, and NH3 by 29.8%. DI also reduced NH3 emissions by 36–39% compared to other NIs. Overall, DI can lower the global warming potential of rice cultivation in trans Indo-Gangetic plains region by 17.1% for both direct and indirect emissions, suggesting its significant potential to reduce India's contribution to total agricultural GHG emissions.

Original languageEnglish
Article number100199
JournalCleaner Environmental Systems
Volume13
DOIs
StatePublished - Jun 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 The Authors

Keywords

  • Ammonia volatilization
  • Greenhouse gas
  • Nitrification inhibitors
  • Reactive nitrogen losses
  • Rice
  • Urease inhibitor

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