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Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China

Nitrous oxide (N(2)O) is a potent greenhouse gas. In North China, vegetable fields are amended with high levels of N fertilizer and irrigation water, which causes massive N(2)O flux. The aim of this study was to determine the contribution of microbial processes to N(2)O production and characterize i...

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Autores principales: Zhang, Wei, Li, Yuzhong, Xu, Chunying, Li, Qiaozhen, Lin, Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4937382/
https://www.ncbi.nlm.nih.gov/pubmed/27387280
http://dx.doi.org/10.1038/srep29257
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author Zhang, Wei
Li, Yuzhong
Xu, Chunying
Li, Qiaozhen
Lin, Wei
author_facet Zhang, Wei
Li, Yuzhong
Xu, Chunying
Li, Qiaozhen
Lin, Wei
author_sort Zhang, Wei
collection PubMed
description Nitrous oxide (N(2)O) is a potent greenhouse gas. In North China, vegetable fields are amended with high levels of N fertilizer and irrigation water, which causes massive N(2)O flux. The aim of this study was to determine the contribution of microbial processes to N(2)O production and characterize isotopic signature effects on N(2)O source partitioning. We conducted a microcosm study that combined naturally abundant isotopologues and gas inhibitor techniques to analyze N(2)O flux and its isotopomer signatures [δ(15)N(bulk), δ(18)O, and SP (intramolecular (15)N site preference)] that emitted from vegetable soil after the addition of NH(4)(+) fertilizers. The results show that ammonia oxidation is the predominant process under high water content (70% water-filled pore space), and nitrifier denitrification contribution increases with increasing N content. δ(15)N(bulk) and δ(18)O of N(2)O may not provide information about microbial processes due to great shifts in precursor signatures and atom exchange, especially for soil treated with NH(4)(+) fertilizer. SP and associated two end-member mixing model are useful to distinguish N(2)O source and contribution. Further work is needed to explore isotopomer signature stability to improve N(2)O microbial process identification.
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spelling pubmed-49373822016-07-13 Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China Zhang, Wei Li, Yuzhong Xu, Chunying Li, Qiaozhen Lin, Wei Sci Rep Article Nitrous oxide (N(2)O) is a potent greenhouse gas. In North China, vegetable fields are amended with high levels of N fertilizer and irrigation water, which causes massive N(2)O flux. The aim of this study was to determine the contribution of microbial processes to N(2)O production and characterize isotopic signature effects on N(2)O source partitioning. We conducted a microcosm study that combined naturally abundant isotopologues and gas inhibitor techniques to analyze N(2)O flux and its isotopomer signatures [δ(15)N(bulk), δ(18)O, and SP (intramolecular (15)N site preference)] that emitted from vegetable soil after the addition of NH(4)(+) fertilizers. The results show that ammonia oxidation is the predominant process under high water content (70% water-filled pore space), and nitrifier denitrification contribution increases with increasing N content. δ(15)N(bulk) and δ(18)O of N(2)O may not provide information about microbial processes due to great shifts in precursor signatures and atom exchange, especially for soil treated with NH(4)(+) fertilizer. SP and associated two end-member mixing model are useful to distinguish N(2)O source and contribution. Further work is needed to explore isotopomer signature stability to improve N(2)O microbial process identification. Nature Publishing Group 2016-07-08 /pmc/articles/PMC4937382/ /pubmed/27387280 http://dx.doi.org/10.1038/srep29257 Text en Copyright © 2016, 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
Zhang, Wei
Li, Yuzhong
Xu, Chunying
Li, Qiaozhen
Lin, Wei
Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China
title Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China
title_full Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China
title_fullStr Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China
title_full_unstemmed Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China
title_short Isotope signatures of N(2)O emitted from vegetable soil: Ammonia oxidation drives N(2)O production in NH(4)(+)-fertilized soil of North China
title_sort isotope signatures of n(2)o emitted from vegetable soil: ammonia oxidation drives n(2)o production in nh(4)(+)-fertilized soil of north china
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4937382/
https://www.ncbi.nlm.nih.gov/pubmed/27387280
http://dx.doi.org/10.1038/srep29257
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