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Confirmation of co-denitrification in grazed grassland
Pasture-based livestock systems are often associated with losses of reactive forms of nitrogen (N) to the environment. Research has focused on losses to air and water due to the health, economic and environmental impacts of reactive N. Di-nitrogen (N(2)) emissions are still poorly characterized, bot...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4663629/ https://www.ncbi.nlm.nih.gov/pubmed/26615911 http://dx.doi.org/10.1038/srep17361 |
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author | Selbie, Diana R. Lanigan, Gary J. Laughlin, Ronald J. Di, Hong J. Moir, James L. Cameron, Keith C. Clough, Tim J. Watson, Catherine J. Grant, James Somers, Cathal Richards, Karl G. |
author_facet | Selbie, Diana R. Lanigan, Gary J. Laughlin, Ronald J. Di, Hong J. Moir, James L. Cameron, Keith C. Clough, Tim J. Watson, Catherine J. Grant, James Somers, Cathal Richards, Karl G. |
author_sort | Selbie, Diana R. |
collection | PubMed |
description | Pasture-based livestock systems are often associated with losses of reactive forms of nitrogen (N) to the environment. Research has focused on losses to air and water due to the health, economic and environmental impacts of reactive N. Di-nitrogen (N(2)) emissions are still poorly characterized, both in terms of the processes involved and their magnitude, due to financial and methodological constraints. Relatively few studies have focused on quantifying N(2) losses in vivo and fewer still have examined the relative contribution of the different N(2) emission processes, particularly in grazed pastures. We used a combination of a high (15)N isotopic enrichment of applied N with a high precision of determination of (15)N isotopic enrichment by isotope-ratio mass spectrometry to measure N(2) emissions in the field. We report that 55.8 g N m(−2) (95%, CI 38 to 77 g m(−2)) was emitted as N(2) by the process of co-denitrification in pastoral soils over 123 days following urine deposition (100 g N m(−2)), compared to only 1.1 g N m(−2) (0.4 to 2.8 g m(−2)) from denitrification. This study provides strong evidence for co-denitrification as a major N(2) production pathway, which has significant implications for understanding the N budgets of pastoral ecosystems. |
format | Online Article Text |
id | pubmed-4663629 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46636292015-12-03 Confirmation of co-denitrification in grazed grassland Selbie, Diana R. Lanigan, Gary J. Laughlin, Ronald J. Di, Hong J. Moir, James L. Cameron, Keith C. Clough, Tim J. Watson, Catherine J. Grant, James Somers, Cathal Richards, Karl G. Sci Rep Article Pasture-based livestock systems are often associated with losses of reactive forms of nitrogen (N) to the environment. Research has focused on losses to air and water due to the health, economic and environmental impacts of reactive N. Di-nitrogen (N(2)) emissions are still poorly characterized, both in terms of the processes involved and their magnitude, due to financial and methodological constraints. Relatively few studies have focused on quantifying N(2) losses in vivo and fewer still have examined the relative contribution of the different N(2) emission processes, particularly in grazed pastures. We used a combination of a high (15)N isotopic enrichment of applied N with a high precision of determination of (15)N isotopic enrichment by isotope-ratio mass spectrometry to measure N(2) emissions in the field. We report that 55.8 g N m(−2) (95%, CI 38 to 77 g m(−2)) was emitted as N(2) by the process of co-denitrification in pastoral soils over 123 days following urine deposition (100 g N m(−2)), compared to only 1.1 g N m(−2) (0.4 to 2.8 g m(−2)) from denitrification. This study provides strong evidence for co-denitrification as a major N(2) production pathway, which has significant implications for understanding the N budgets of pastoral ecosystems. Nature Publishing Group 2015-11-30 /pmc/articles/PMC4663629/ /pubmed/26615911 http://dx.doi.org/10.1038/srep17361 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Selbie, Diana R. Lanigan, Gary J. Laughlin, Ronald J. Di, Hong J. Moir, James L. Cameron, Keith C. Clough, Tim J. Watson, Catherine J. Grant, James Somers, Cathal Richards, Karl G. Confirmation of co-denitrification in grazed grassland |
title | Confirmation of co-denitrification in grazed grassland |
title_full | Confirmation of co-denitrification in grazed grassland |
title_fullStr | Confirmation of co-denitrification in grazed grassland |
title_full_unstemmed | Confirmation of co-denitrification in grazed grassland |
title_short | Confirmation of co-denitrification in grazed grassland |
title_sort | confirmation of co-denitrification in grazed grassland |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4663629/ https://www.ncbi.nlm.nih.gov/pubmed/26615911 http://dx.doi.org/10.1038/srep17361 |
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