Nitrous oxide fluxes and soil oxygen dynamics of soil treated with cow urine
dc.contributor.author | Owens, J | |
dc.contributor.author | Clough, Timothy | |
dc.contributor.author | Laubach, J | |
dc.contributor.author | Hunt, JE | |
dc.contributor.author | Venterea, RT | |
dc.date.accessioned | 2018-05-11T02:04:21Z | |
dc.date.available | 2017-04-20 | |
dc.date.issued | 2017-04-20 | |
dc.date.submitted | 2016-11-17 | |
dc.description.abstract | Ruminant urine deposition onto pasture creates hot-spots where emissions of nitrous oxide (N₂O) are produced by aerobic and anaerobic microbial pathways. However, limited measurements of in situ soil oxygen (O₂)-N₂O relationships hinder the prediction of N₂O emissions from urine-affected soil. This study tested whether soil O₂ concentration or relative diffusivity of O₂ (Dp/DO) could explain N₂O emissions from urine patches. Using a randomized plot design, N₂O emissions were measured daily from a perennial ryegrass (Lolium perenne L.) pasture for 56 d following bovine (Bos taurus) urine deposition to an imperfectly drained silty loam soil. Soil O₂, volumetric water content, pH, conductivity, and extractable N and C were measured in urine-amended and non-amended soil. Values of water-filled pore space (WFPS) and Dp/DO were modeled. When data from treatments were pooled together, daily mean Dp/DO explained 73% of the total variance in mean daily N₂O flux, compared with 65, < 60, and < 20% for WFPS, O₂ and other measured variables, respectively. Soil pH, O₂, volumetric water content, WFPS and Dp/DO all explained more of the variance in the urineamended compared with the non-amended soil. Daily N₂O fluxes increased substantially at Dp/DO values around 0.006, which was consistent with past laboratory studies. These results demonstrate for the first time an O₂ diffusion threshold for elevated N₂O fluxes in the field, expressed as Dp/DO ≈ 0.006. Further studies should examine the consistency of this threshold under varying N and C substrates and a range of soil pH. | |
dc.format.extent | pp.289-298 | |
dc.identifier | https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=elements_prod&SrcAuth=WosAPI&KeyUT=WOS:000400696900006&DestLinkType=FullRecord&DestApp=WOS_CPL | |
dc.identifier.citation | Owens, J., Clough, T.J., Laubach, J., Hunt, J.E, & Venterea, R.T. (2017). Nitrous oxide fluxes and soil oxygen dynamics of soil treated with cow urine. Soil Science of America Journal, 81(2), 289-298. doi: 10.2136/sssaj2016.09.0277 | |
dc.identifier.doi | 10.2136/sssaj2016.09.0277 | |
dc.identifier.eissn | 1435-0661 | |
dc.identifier.issn | 0361-5995 | |
dc.identifier.other | EU0JI (isidoc) | |
dc.identifier.uri | https://hdl.handle.net/10182/9345 | |
dc.language | en | |
dc.language.iso | en | |
dc.publisher | Soil Science Society of America | |
dc.relation | The original publication is available from Soil Science Society of America - https://doi.org/10.2136/sssaj2016.09.0277 - http://dx.doi.org/10.2136/sssaj2016.09.0277 | |
dc.relation.isPartOf | Soil Science Society of America Journal | |
dc.relation.uri | https://doi.org/10.2136/sssaj2016.09.0277 | |
dc.rights | © Soil Science Society of America | |
dc.rights.ccname | Attribution-NonCommercial-NoDerivatives | |
dc.rights.ccuri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.subject | nitrous oxide | |
dc.subject | greenhouse gases | |
dc.subject | N-based fertilizer inputs | |
dc.subject | denitrification | |
dc.subject | nitrous oxide fluxes | |
dc.subject.anzsrc2020 | ANZSRC::30 Agricultural, veterinary and food sciences | |
dc.subject.anzsrc2020 | ANZSRC::31 Biological sciences | |
dc.subject.anzsrc2020 | ANZSRC::41 Environmental sciences | |
dc.title | Nitrous oxide fluxes and soil oxygen dynamics of soil treated with cow urine | |
dc.type | Journal Article | |
lu.contributor.unit | LU | |
lu.contributor.unit | LU|Agriculture and Life Sciences | |
lu.contributor.unit | LU|Agriculture and Life Sciences|SOILS | |
lu.contributor.unit | LU|Research Management Office | |
lu.contributor.unit | LU|Research Management Office|OLD QE18 | |
lu.identifier.orcid | 0000-0002-5978-5274 | |
pubs.issue | 2 | |
pubs.publication-status | Published | |
pubs.publisher-url | http://dx.doi.org/10.2136/sssaj2016.09.0277 | |
pubs.volume | 81 |