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“Hot spots” of N and C impact nitric oxide, nitrous oxide and nitrogen gas emissions from a UK grassland soil

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dc.contributor.author Loicka, Nadine
dc.contributor.author Dixon, Elizabeth
dc.contributor.author Abalos, Diego
dc.contributor.author Vallejo, Antonio
dc.contributor.author Matthews, Peter
dc.contributor.author McGeough, Karen
dc.contributor.author Watson, Catherine
dc.contributor.author Baggs, Elizabeth M.
dc.contributor.author Cardenas, Laura M.
dc.date.accessioned 2021-07-22T11:09:17Z
dc.date.available 2021-07-22T11:09:17Z
dc.date.issued 2017-07-03
dc.identifier http://hdl.handle.net/20.500.12518/325
dc.identifier.citation Loick, N., Dixon, E., Abalos, D., Vallejo, A., Matthews, P., McGeough, K., Watson, C., Baggs, E. M. and Cardenas, L. M. (2017) ‘“Hot spots” of N and C impact nitric oxide, nitrous oxide and nitrogen gas emissions from a UK grassland soil’, Geoderma, 305, pp. 336–345. doi: 10.1016/j.geoderma.2017.06.007.
dc.identifier.issn 0016-7061
dc.identifier.uri http://dx.doi.org/10.1016/j.geoderma.2017.06.007
dc.description Publication history: Accepted - 6 June 2017; Published online - 3 July 2017. en_US
dc.description.abstract Agricultural soils are a major source of nitric- (NO) and nitrous oxide (N2O), which are produced and consumed by biotic and abiotic soil processes. The dominant sources of NO and N2O are microbial nitrification and denitrification, and emissions of NO and N2O generally increase after fertiliser application. The present study investigated the impact of N-source distribution on emissions of NO and N2O from soil and the significance of denitrification, rather than nitrification, as a source of NO emissions. To eliminate spatial variability and changing environmental factors which impact processes and results, the experiment was conducted under highly controlled conditions. A laboratory incubation system (DENIS) was used, allowing simultaneous measurement of three N-gases (NO, N2O, N2) emitted from a repacked soil core, which was combined with 15N-enrichment isotopic techniques to determine the source of N emissions. It was found that the areal distribution of N and C significantly affected the quantity and timing of gaseous emissions and 15N-analysis showed that N2O emissions resulted almost exclusively from the added amendments. Localised higher concentrations, so-called hot spots, resulted in a delay in N2O and N2 emissions causing a longer residence time of the applied N-source in the soil, therefore minimising NO emissions while at the same time being potentially advantageous for plant-uptake of nutrients. If such effects are also observed for a wider range of soils and conditions, then this will have major implications for fertiliser application protocols to minimise gaseous N emissions while maintaining fertilisation efficiency. en_US
dc.description.sponsorship Rothamsted Research receives strategic funding by the Biotechnology and Biological Sciences Research Council (BBSRC). This study was funded by BBSRC project BB/K001051/1. D. Abalos thanks the Spanish Ministry of Science and Innovation for economic support through the Project AGL2009-08412-AGR. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/). en_US
dc.subject Denitrification en_US
dc.subject Flow-through system en_US
dc.subject Isotopes en_US
dc.subject Nitrogen cycle en_US
dc.subject Greenhouse gas (GHG) emissions en_US
dc.title “Hot spots” of N and C impact nitric oxide, nitrous oxide and nitrogen gas emissions from a UK grassland soil en_US
dc.type Article en_US

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