| Title | A review of nitrogen flow in the anthroposphere to identify key control sectors |
|---|---|
| ID_Doc | 6642 |
| Authors | Rana, S; Kumar, A; Kumar, N; Jat, MK |
| Title | A review of nitrogen flow in the anthroposphere to identify key control sectors |
| Year | 2024 |
| Published | Clean Technologies And Environmental Policy, 26, 2 |
| Abstract | Mitigating the negative environmental impacts caused by nitrogen (N) requires an understanding of its flows across and through various systems. This study fills a research gap by identifying the key N sink and sources with flows at three geographical scales (city, region, and country) using a comprehensive literature review. For a systematic literature review, the PRISMA 2020 method was used to select thirty-three studies spanning from 1995 to 2023. The findings of the study indicate that at the city scale, N enters primarily as food and miscellaneous (e.g., fossil fuel) flow and exits as emission and soil losses, while the primary stock of N occurs in landfills. At the region scale, the inflow of N is via feed and fertilizers and the main outflow is emissions and food; the N stock occurs in the soil available in the ecosystem. At the country scale, N imports come from Feed and Fertilizer, while the N outflows occur through emission and food with majority of N stocks held in the soil. The major outflows and stocks identified in this assessment can have potential to improve N management in future studies by acting as a guide for selection of key sectors, appropriate geographical scales, and flows. The main limitation in analysis originates from the varying scope of studies available in the literature. It would be better to have the data available for multi-year time periods at city and region scale so as to achieve more confidence in findings of future N flow studies. |
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