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dc.contributor.authorForrestal, Patrick J.*
dc.contributor.authorKrol, Dominika*
dc.contributor.authorLanigan, Gary*
dc.contributor.authorJahangir, Mohammad M. R.*
dc.contributor.authorRichards, Karl G.*
dc.date.accessioned2017-04-24T12:06:36Z
dc.date.available2017-12-01T17:00:08Z
dc.date.issued28/11/2016
dc.identifier.citationFORRESTAL, P., KROL, D., LANIGAN, G., JAHANGIR, M., & RICHARDS, K. (2016). An evaluation of urine patch simulation methods for nitrous oxide emission measurement. The Journal of Agricultural Science, 1-8. doi:10.1017/S0021859616000939en_GB
dc.identifier.urihttp://hdl.handle.net/11019/1121
dc.descriptionpeer-revieweden_GB
dc.description.abstractGlobal nitrous oxide (N2O) inventory estimates for pasture systems are refined based on measurements of N2O loss from simulated urine patches. A variety of methods are used for patch simulation but they frequently use a uniform wetted area (UWA), often smaller than a bovine urine patch. However, natural patches follow non-uniform infiltration patterns expanding naturally from a point of deposit with a non-wetted zone of influence. Using 2 litres of urine the UWA method was compared, using a 0·156 m2 collar, with a naturally expanding effective area (NEEA) method, using a 0·462 m2 collar under high (HL) and low (LL) N2O loss conditions. The method chosen affects urine nitrogen (N) loading to the soil. Under HL the UWA method induced a N2O-N loss of 280·6 mg/patch, significantly less than the 434·8 mg/patch loss for the NEEA method, for the same simulated urination. Under LL there was no method effect. Efforts should be made to employ patch simulation methods, which mimic natural deposits and can be achieved, at least in part, by: (a) Using a urine volume and N content similar to that of the animal of interest. (b) Allowing natural infiltration of the chosen urine volume to permit tapering towards the edges. (c) Measuring from the zone of influence in addition to the wetted area, i.e. the patch effective area.en_GB
dc.language.isoenen_GB
dc.publisherCambridge University Pressen_GB
dc.relation.ispartofseriesJournal of Agricultural Science;
dc.subjectNitrous oxideen_GB
dc.subjectUrine patchen_GB
dc.subjectDenitrificationen_GB
dc.subjectpasture range paddocken_GB
dc.titleAn evaluation of urine patch simulation methods for nitrous oxide emission measurementen_GB
dc.typeArticleen_GB
dc.embargo.terms28/11/2017en_GB
dc.identifier.doihttp://dx.doi.org/10.1017/S0021859616000939
refterms.dateFOA2018-01-12T08:32:18Z


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