A high-resolution assessment on global nitrogen flows in cropland
Crop production is the single largest cause of human alteration of the global nitrogen cycle. We present a comprehensive assessment of global nitrogen flows in cropland for the year 2000 with a spatial resolution of 5 arc-minutes. We calculated a total nitrogen input (IN) of 136.60 trillion grams (T...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
National Academy of Sciences
2010
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/1205 |
| _version_ | 1855521862054838272 |
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| author | Liu, J. You, Liangzhi Amini, M. Obersteiner, Michael Herrero, Mario Zehnder, A.J.B. Yang, H. |
| author_browse | Amini, M. Herrero, Mario Liu, J. Obersteiner, Michael Yang, H. You, Liangzhi Zehnder, A.J.B. |
| author_facet | Liu, J. You, Liangzhi Amini, M. Obersteiner, Michael Herrero, Mario Zehnder, A.J.B. Yang, H. |
| author_sort | Liu, J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Crop production is the single largest cause of human alteration of the global nitrogen cycle. We present a comprehensive assessment of global nitrogen flows in cropland for the year 2000 with a spatial resolution of 5 arc-minutes. We calculated a total nitrogen input (IN) of 136.60 trillion grams (Tg) of N per year, of which almost half is contributed by mineral nitrogen fertilizers, and a total nitrogen output (OUT) of 148.14 Tg of N per year, of which 55% is uptake by harvested crops and crop residues. We present high-resolution maps quantifying the spatial distribution of nitrogen IN and OUT flows, soil nitrogen balance, and surface nitrogen balance. The high-resolution data are aggregated at the national level on a per capita basis to assess nitrogen stress levels. The results show that almost 80% of African countries are confronted with nitrogen scarcity or nitrogen stress problems, which, along with poverty, cause food insecurity and malnutrition. The assessment also shows a global average nitrogen recovery rate of 59%, indicating that nearly two-fifths of nitrogen inputs are lost in ecosystems. More effective management of nitrogen is essential to reduce the deleterious environmental consequences. |
| format | Journal Article |
| id | CGSpace1205 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| publisher | National Academy of Sciences |
| publisherStr | National Academy of Sciences |
| record_format | dspace |
| spelling | CGSpace12052025-05-01T21:01:33Z A high-resolution assessment on global nitrogen flows in cropland Liu, J. You, Liangzhi Amini, M. Obersteiner, Michael Herrero, Mario Zehnder, A.J.B. Yang, H. nitrogen plant production Crop production is the single largest cause of human alteration of the global nitrogen cycle. We present a comprehensive assessment of global nitrogen flows in cropland for the year 2000 with a spatial resolution of 5 arc-minutes. We calculated a total nitrogen input (IN) of 136.60 trillion grams (Tg) of N per year, of which almost half is contributed by mineral nitrogen fertilizers, and a total nitrogen output (OUT) of 148.14 Tg of N per year, of which 55% is uptake by harvested crops and crop residues. We present high-resolution maps quantifying the spatial distribution of nitrogen IN and OUT flows, soil nitrogen balance, and surface nitrogen balance. The high-resolution data are aggregated at the national level on a per capita basis to assess nitrogen stress levels. The results show that almost 80% of African countries are confronted with nitrogen scarcity or nitrogen stress problems, which, along with poverty, cause food insecurity and malnutrition. The assessment also shows a global average nitrogen recovery rate of 59%, indicating that nearly two-fifths of nitrogen inputs are lost in ecosystems. More effective management of nitrogen is essential to reduce the deleterious environmental consequences. 2010-04-27 2010-04-13T06:01:47Z 2010-04-13T06:01:47Z Journal Article https://hdl.handle.net/10568/1205 en Open Access National Academy of Sciences Liu, J.; You, L.; Amini, M.; Obersteiner, M.; Herrero, M.; Zehnder, A.J.B.; Yang, H. 2010. A high-resolution assessment on global nitrogen flows in cropland. Proceedings of the National Academy of Sciences 107(17): 8035-8040. |
| spellingShingle | nitrogen plant production Liu, J. You, Liangzhi Amini, M. Obersteiner, Michael Herrero, Mario Zehnder, A.J.B. Yang, H. A high-resolution assessment on global nitrogen flows in cropland |
| title | A high-resolution assessment on global nitrogen flows in cropland |
| title_full | A high-resolution assessment on global nitrogen flows in cropland |
| title_fullStr | A high-resolution assessment on global nitrogen flows in cropland |
| title_full_unstemmed | A high-resolution assessment on global nitrogen flows in cropland |
| title_short | A high-resolution assessment on global nitrogen flows in cropland |
| title_sort | high resolution assessment on global nitrogen flows in cropland |
| topic | nitrogen plant production |
| url | https://hdl.handle.net/10568/1205 |
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