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<p>The application of nitrogen fertilizers is a cornerstone of modern agriculture and is a vital for optimizing crop growth and productivity. However, the extensive use of nitrogen fertilizers has raised significant environmental concerns, including soil degradation, water pollution, and greenhouse gas emissions. This review offers a comprehensive synthesis of 30 years of isotope-based studies, focusing on nitrogen recovery efficiency (NRE), a more specific measure of nitrogen use efficiency (NUE), which quantifies the proportion of applied nitrogen absorbed by crops. We emphasize studies utilizing <sup>15</sup>N-enriched fertilizers. Unlike previous studies that addressed isolated aspects of nitrogen dynamics, this review integrates findings on nitrogen transformation pathways, recovery rates, and environmental losses. We highlight key factors influencing NUE, including fertilizer formulation, soil properties, and management practices, while identifying critical knowledge gaps that limit further advancements. The analysis underscores the importance of isotopic methods in refining NUE assessments and optimizing nitrogen management strategies. By linking recent advances in isotope tracing with agronomic innovations, this review provides new insights into sustainable nitrogen use, contributing to the development of more efficient and environmentally friendly fertilization practices.</p>

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Advances in Nitrogen Use Efficiency of 15N-Enriched Fertilizers: A Thirty-Year Review of Research and Innovations for Sustainable Agriculture

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Nabila El Alami,
  • Marwa Bourguid,
  • Mohamed Kouighat

摘要

The application of nitrogen fertilizers is a cornerstone of modern agriculture and is a vital for optimizing crop growth and productivity. However, the extensive use of nitrogen fertilizers has raised significant environmental concerns, including soil degradation, water pollution, and greenhouse gas emissions. This review offers a comprehensive synthesis of 30 years of isotope-based studies, focusing on nitrogen recovery efficiency (NRE), a more specific measure of nitrogen use efficiency (NUE), which quantifies the proportion of applied nitrogen absorbed by crops. We emphasize studies utilizing 15N-enriched fertilizers. Unlike previous studies that addressed isolated aspects of nitrogen dynamics, this review integrates findings on nitrogen transformation pathways, recovery rates, and environmental losses. We highlight key factors influencing NUE, including fertilizer formulation, soil properties, and management practices, while identifying critical knowledge gaps that limit further advancements. The analysis underscores the importance of isotopic methods in refining NUE assessments and optimizing nitrogen management strategies. By linking recent advances in isotope tracing with agronomic innovations, this review provides new insights into sustainable nitrogen use, contributing to the development of more efficient and environmentally friendly fertilization practices.