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dc.contributor.authorDi, Hong J.en
dc.contributor.authorCameron, Keith C.en
dc.contributor.authorShen, J.en
dc.contributor.authorHe, J.en
dc.contributor.authorWinefield, Christopher S.en
dc.contributor.authorBowatte, S.en
dc.date.accessioned2011-10-27T23:10:10Z
dc.date.issued2010-08en
dc.identifier.citationDi, H. J., Cameron, K. C., Shen, J. P., He, J. Z., Winefield, C. S., O'Callaghan, M. & Bowatte, S. (2010). Nitrate leaching and nitrous oxide emissions related to bacteria and not to archaea in nitrogen rich grassland soils. In R. J. Gilkes & N. Prakongkep (Eds.) Soil Solutions for a Changing World : Proceedings of the 19th World Congress of Soil Science, Brisbane, Australia, 1-6 August 2010. Symposium 3.5.2, Risk assessment and risk based remediation (pp. 44-47). Brisbane, Australia: IUSS.en
dc.identifier.isbn978-0-646-53783-2en
dc.identifier.urihttps://hdl.handle.net/10182/3974
dc.description.abstractThe oxidation of ammonia (NH₃) to nitrate (NO₃⁻) is a key process in the global nitrogen (N) cycle which has major ecological and environmental implications both in influencing nitrous oxide (N₂O) emissions and NO₃⁻ leaching. We investigated the relationships between nitrification, NO₃⁻ leaching and N₂O emissions with ammonia oxidizing bacteria (AOB) and archaea (AOA) in nitrogen rich grassland soils. Both AOA and AOB were detected in large numbers in these grassland soils. The AOB abundance grew by 3.2 to 10.4 fold and activity increased by 177 fold in response to the addition of a urine-N substrate, and the AOB growth was significantly inhibited by a nitrification inhibitor, dicyandiamide (DCD). However, neither the AOA abundance, nor activity, increased with the application of an ammonia substrate. DCD decreased NO₃⁻ leaching by 59% and decreased N₂O emissions by 64% from animal urine-N patches. Significant quantitative relationships were found between the AOB abundance and the nitrification rate, NO₃⁻ -N leaching losses, and N₂O emissions, whereas no such relationships were found with AOA. These findings suggest that nitrification and thus NO₃⁻ leaching and N₂O emissions are driven by bacteria rather than archaea in these nitrogen rich grassland soils.en
dc.format.extent44-47en
dc.language.isoenen
dc.publisherInternational Union of Soil Sciencesen
dc.relationThe original publication is available from - International Union of Soil Sciencesen
dc.rights© 2010 19th World Congress of Soil Science, Soil Solutions for a Changing World. Archived with publisher permission.en
dc.source19th World Congress of Soil Science, Soil Solutions for a Changing Worlden
dc.subjectammonia oxidising archaeaen
dc.subjectammonia oxidising bacteriaen
dc.subjectnitrificationen
dc.subjectnitrification inhibitoren
dc.subjectnitrate leachingen
dc.subjectnitrous oxide emissionsen
dc.subjectgrazed grassland soilen
dc.titleNitrate leaching and nitrous oxide emissions related to bacteria and not to archaea in nitrogen rich grassland soilsen
dc.typeConference Contribution - Published
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
lu.contributor.unitDepartment of Wine, Food and Molecular Biosciencesen
pubs.finish-date2010-08-06en
pubs.notesPaper presented at the 19th World Congress of Soil Science, Soil Solutions for a Changing World, 1-6 August 2010, Brisbane, Australia.en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Agriculture and Life Sciences/WFMB
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/PE20
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.start-date2010-08-01en
lu.identifier.orcid0000-0002-6966-0299
lu.identifier.orcid0000-0002-7631-1636
lu.identifier.orcid0000-0002-6262-6370
lu.subtypeConference Paperen


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