Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil

Abstract Intensively managed agricultural pastures contribute to N2O and N2 fluxes resulting in detrimental environmental outcomes and poor N use efficiency, respectively. Besides nitrification, nitrifier-denitrification and heterotrophic denitrification, alternative pathways such as codenitrificati...

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Autores principales:	Timothy J. Clough, Gary J. Lanigan, Cecile A. M. de Klein, Md. Sainur Samad, Sergio E. Morales, David Rex, Lars R. Bakken, Charlotte Johns, Leo M. Condron, Jim Grant, Karl G. Richards
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a06692ec6994496a9cf660a9809f9eac
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spelling	oai:doaj.org-article:a06692ec6994496a9cf660a9809f9eac2021-12-02T11:53:02ZInfluence of soil moisture on codenitrification fluxes from a urea-affected pasture soil10.1038/s41598-017-02278-y2045-2322https://doaj.org/article/a06692ec6994496a9cf660a9809f9eac2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02278-yhttps://doaj.org/toc/2045-2322Abstract Intensively managed agricultural pastures contribute to N2O and N2 fluxes resulting in detrimental environmental outcomes and poor N use efficiency, respectively. Besides nitrification, nitrifier-denitrification and heterotrophic denitrification, alternative pathways such as codenitrification also contribute to emissions under ruminant urine-affected soil. However, information on codenitrification is sparse. The objectives of this experiment were to assess the effects of soil moisture and soil inorganic-N dynamics on the relative contributions of codenitrification and denitrification (heterotrophic denitrification) to the N2O and N2 fluxes under a simulated ruminant urine event. Repacked soil cores were treated with 15N enriched urea and maintained at near saturation (−1 kPa) or field capacity (−10 kPa). Soil inorganic-N, pH, dissolved organic carbon, N2O and N2 fluxes were measured over 63 days. Fluxes of N2, attributable to codenitrification, were at a maximum when soil nitrite (NO2 −) concentrations were elevated. Cumulative codenitrification was higher (P = 0.043) at −1 kPa. However, the ratio of codenitrification to denitrification did not differ significantly with soil moisture, 25.5 ± 15.8 and 12.9 ± 4.8% (stdev) at −1 and −10 kPa, respectively. Elevated soil NO2 − concentrations are shown to contribute to codenitrification, particularly at −1 kPa.Timothy J. CloughGary J. LaniganCecile A. M. de KleinMd. Sainur SamadSergio E. MoralesDavid RexLars R. BakkenCharlotte JohnsLeo M. CondronJim GrantKarl G. RichardsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Timothy J. Clough Gary J. Lanigan Cecile A. M. de Klein Md. Sainur Samad Sergio E. Morales David Rex Lars R. Bakken Charlotte Johns Leo M. Condron Jim Grant Karl G. Richards Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
description	Abstract Intensively managed agricultural pastures contribute to N2O and N2 fluxes resulting in detrimental environmental outcomes and poor N use efficiency, respectively. Besides nitrification, nitrifier-denitrification and heterotrophic denitrification, alternative pathways such as codenitrification also contribute to emissions under ruminant urine-affected soil. However, information on codenitrification is sparse. The objectives of this experiment were to assess the effects of soil moisture and soil inorganic-N dynamics on the relative contributions of codenitrification and denitrification (heterotrophic denitrification) to the N2O and N2 fluxes under a simulated ruminant urine event. Repacked soil cores were treated with 15N enriched urea and maintained at near saturation (−1 kPa) or field capacity (−10 kPa). Soil inorganic-N, pH, dissolved organic carbon, N2O and N2 fluxes were measured over 63 days. Fluxes of N2, attributable to codenitrification, were at a maximum when soil nitrite (NO2 −) concentrations were elevated. Cumulative codenitrification was higher (P = 0.043) at −1 kPa. However, the ratio of codenitrification to denitrification did not differ significantly with soil moisture, 25.5 ± 15.8 and 12.9 ± 4.8% (stdev) at −1 and −10 kPa, respectively. Elevated soil NO2 − concentrations are shown to contribute to codenitrification, particularly at −1 kPa.
format	article
author	Timothy J. Clough Gary J. Lanigan Cecile A. M. de Klein Md. Sainur Samad Sergio E. Morales David Rex Lars R. Bakken Charlotte Johns Leo M. Condron Jim Grant Karl G. Richards
author_facet	Timothy J. Clough Gary J. Lanigan Cecile A. M. de Klein Md. Sainur Samad Sergio E. Morales David Rex Lars R. Bakken Charlotte Johns Leo M. Condron Jim Grant Karl G. Richards
author_sort	Timothy J. Clough
title	Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
title_short	Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
title_full	Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
title_fullStr	Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
title_full_unstemmed	Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
title_sort	influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a06692ec6994496a9cf660a9809f9eac
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Influence of soil moisture on codenitrification fluxes from a urea-affected pasture soil

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