Redistribution of nitrogen to feed the people on a safer planet.

Autor:	Kahiluoto H; Sustainability Science, LUT University, 53850 Lappeenranta, Finland.; Agroecology, University of Helsinki, 00014 Helsinki, Finland., Sakieh Y; Sustainability Science, LUT University, 53850 Lappeenranta, Finland., Kaseva J; Applied Statistical Methods, Natural Resources Institute Finland, 00790 Helsinki, Finland., Kersebaum KC; Tropical Plant Production and Agricultural Systems Modeling (TROPAGS), University of Göttingen, 37077 Göttingen, Germany.; Ecosystem Modelling, Leibniz Centre for Agricultural Landscape Research, 15374 Müncheberg, Germany.; Global Change Research Institute, Czech Academy of Sciences, 60300 Brno, Czech Republic., Minoli S; Climate Resilience, Potsdam Institute for Climate Impact Research (PIK), 14412 Potsdam, Germany., Franke J; Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60647, USA., Rötter RP; Tropical Plant Production and Agricultural Systems Modeling (TROPAGS), University of Göttingen, 37077 Göttingen, Germany.; Centre of Biodiversity and Sustainable Land Use, University of Göttingen, 37077 Göttingen, Germany., Müller C; Climate Resilience, Potsdam Institute for Climate Impact Research (PIK), 14412 Potsdam, Germany.
Jazyk:	angličtina
Zdroj:	PNAS nexus [PNAS Nexus] 2024 May 14; Vol. 3 (5), pp. pgae170. Date of Electronic Publication: 2024 May 14 (Print Publication: 2024).
DOI:	10.1093/pnasnexus/pgae170
Abstrakt:	Lack of nitrogen limits food production in poor countries while excessive nitrogen use in industrial countries has led to transgression of the planetary boundary. However, the potential of spatial redistribution of nitrogen input for food security when returning to the safe boundary has not been quantified in a robust manner. Using an emulator of a global gridded crop model ensemble, we found that redistribution of current nitrogen input to major cereals among countries can double production in the most food-insecure countries, while increasing global production of these crops by 12% with no notable regional loss or reducing the nitrogen input to the current production by one-third. Redistribution of the input within the boundary increased production by 6-8% compared to the current relative distribution, increasing production in the food-insecure countries by two-thirds. Our findings provide georeferenced guidelines for redistributing nitrogen use to enhance food security while safeguarding the planet. (© The Author(s) 2024. Published by Oxford University Press on behalf of National Academy of Sciences.)
Databáze:	MEDLINE
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