A high-resolution assessment on global nitrogen flows in cropland

9236 9 61576 3 169250 document 61576 A high-resolution assessment on global nitrogen flows in cropland.pdf application/pdf c514f4f2ad4306c30004a4d02fde3218 MD5 1029420 2016-06-09 14:44:25 https://pure.iiasa.ac.at/id/eprint/9236/1/A%20high-resolution%20assessment%20on%20global%20nitrogen%20flows%20in%20cropland.pdf 9236 1 1 application/pdf text en public cc_by_nc

A high-resolution assessment on global nitrogen flows in cropland.pdf

published 61593 2 169271 document 61593 lightbox.jpg image/png 6296b2101e61283beedf7ef136d70ba1 MD5 74446 2016-06-09 14:54:39 https://pure.iiasa.ac.at/id/eprint/9236/2/lightbox.jpg 9236 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en public

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/61576 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/61576 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/61576 archive 351 disk0/00/00/92/36 2016-01-15 08:43:59 2021-08-27 17:21:17 2016-01-15 08:43:59 article show Liu J. 8187 You L. Amini M. Obersteiner M. 7255 0000-0001-6981-2769 Herrero M. Zehnder A.J.B. Yang H. A high-resolution assessment on global nitrogen flows in cropland pub iis_for prog_for Global nitrogen cycle; Malnutrition; Nitrogen scarcity; Soil fertility 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 assesment 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 published National Academy of Sciences 10.1073/pnas.0913658107 XJ-10-070 PNAS; 107(17):8035-8040 (27 April 2010) (Published online 12 April 2010) [doi:10.1073/pnas.0913658107] 184 219 public Proceedings of the National Academy of Sciences 107 17 8035-8040 TRUE 1091-6490 FALSE info:eu-repo/semantics/article