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dc.contributor.authorClagnan, Elisa
dc.contributor.authorThornton, Steven F
dc.contributor.authorRolfe, Stephen A.
dc.contributor.authorWells, Naomi
dc.contributor.authorKnoeller, Kay
dc.contributor.authorMurphy, John
dc.contributor.authorTuohy, Patrick
dc.contributor.authorDaly, Karen M.
dc.contributor.authorHealy, Mark G.
dc.contributor.authorEzzati, Golnaz
dc.contributor.authorvon Chamier, Julia
dc.contributor.authorFenton, Owen
dc.date.accessioned2020-06-23T13:14:20Z
dc.date.available2020-06-23T13:14:20Z
dc.date.issued2019-07-23
dc.identifier.citationClagnan E, Thornton SF, Rolfe SA, Wells NS, Knoeller K, Murphy J, et al. (2019) An integrated assessment of nitrogen source, transformation and fate within an intensive dairy system to inform management change. PLoS ONE 14(7): e0219479. https://doi.org/10.1371/journal.pone.0219479en_US
dc.identifier.urihttp://hdl.handle.net/11019/2050
dc.descriptionpeer-revieweden_US
dc.description.abstractFrom an environmental perspective optimised dairy systems, which follow current regulations, still have low nitrogen (N) use efficiency, high N surplus (kg N ha-1) and enable ad-hoc delivery of direct and indirect reactive N losses to water and the atmosphere. The objective of the present study was to divide an intensive dairy farm into N attenuation capacity areas based on this ad-hoc delivery. Historical and current spatial and temporal multi-level datasets (stable isotope and dissolved gas) were combined and interpreted. Results showed that the farm had four distinct attenuation areas: high N attenuation: characterised by ammonium-N (NH4+-N) below 0.23 mg NH4+-N l-1 and nitrate (NO3--N) below 5.65 mg NO3--N l-1 in surface, drainage and groundwater, located on imperfectly to moderately-well drained soils with high denitrification potential and low nitrous oxide (N2O) emissions (av. 0.0032 mg N2O-N l-1); moderate N attenuation: characterised by low NO3--N concentration in drainage water but high N2O production (0.0317 mg N2O-N l-1) and denitrification potential lower than group 1 (av. δ15N-NO3-: 16.4‰, av. δ18O-NO3-: 9.2‰), on well to moderately drained soils; low N attenuation—area 1: characterised by high NO3--N (av. 6.90 mg NO3--N l-1) in drainage water from well to moderately-well drained soils, with low denitrification potential (av. δ15N-NO3-: 9.5‰, av. δ18O-NO3-: 5.9‰) and high N2O emissions (0.0319 mg N2O l-1); and low N attenuation—area 2: characterised by high NH4+-N (av. 3.93 mg NH4+-N l-1 and high N2O emissions (av. 0.0521 mg N2O l-1) from well to imperfectly drained soil. N loads on site should be moved away from low attenuation areas and emissions to air and water should be assessed.en_US
dc.language.isoenen_US
dc.publisherPLoS ONEen_US
dc.relation.ispartofseriesPLoS ONE;Vol. 14 (7)
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectdairy systemsen_US
dc.subjectmanagement changeen_US
dc.subjectnitrogenen_US
dc.subjectdissimilatory nitrate reduction to ammoniumen_US
dc.subjectDNRAen_US
dc.subjectnitrificationen_US
dc.subjectsoilen_US
dc.titleAn integrated assessment of nitrogen source, transformation and fate within an intensive dairy system to inform management changeen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0219479
dc.contributor.sponsorMarie Skłodowska-Curie scholarshipen_US
dc.contributor.sponsorTeagasc Walsh Fellowship Programmeen_US
refterms.dateFOA2020-06-23T13:14:21Z


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