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dc.contributor.authorvan Kessel, C.en
dc.contributor.authorClough, Timothy J.en
dc.contributor.authorvan Groenigen, J.-W.en
dc.date.accessioned2010-04-23T02:56:47Z
dc.date.issued2009en
dc.identifier.citationvan Kessel, C., Clough, T., & van Groenigen, J. W. (2009). Dissolved organic nitrogen: An overlooked pathway of nitrogen loss from agricultural systems? Journal of Environmental Quality, 38(2), 393-401.en
dc.identifier.issn0047-2425en
dc.identifier.urihttps://hdl.handle.net/10182/1736
dc.description.abstractConventional wisdom postulates that leaching losses of N from agriculture systems are dominated by NO₃⁻. Although the export of dissolved organic nitrogen (DON) into the groundwater has been recognized for more than 100 yr, it is often ignored when total N budgets are constructed. Leaching of DON into stream and drinking water reservoirs leads to eutrophication and acidification, and can pose a potential risk to human health. The main objective of this review was to determine whether DON losses from agricultural systems are significant, and to what extent they pose a risk to human health and the environment. Dissolved organic N losses across agricultural systems varied widely with minimum losses of 0.3 kg DON ha⁻¹yr⁻¹ in a pasture to a maximum loss of 127 kg DON ha⁻¹yr⁻¹ in a grassland following the application of urine. The mean and median values for DON leaching losses were found to be 12.7 and 4.0 kg N ha⁻¹yr⁻¹, respectively. On average, DON losses accounted for 26% of the total soluble N (NO₃⁻ plus DON) losses, with a median value of 19%. With a few exceptions, DON concentrations exceeded the criteria recommendations for drinking water quality. The extent of DON losses increased with increasing precipitation/irrigation, higher total inputs of N, and increasing sand content. It is concluded that DON leaching can be an important N loss pathway from agricultural systems. Models used to simulate and predict N losses from agricultural systems should include DON losses.en
dc.format.extent393-401en
dc.language.isoenen
dc.publisherAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of Americaen
dc.relationThe original publication is available from - American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America - https://doi.org/10.2134/jeq2008.0277en
dc.relation.urihttps://doi.org/10.2134/jeq2008.0277en
dc.rightsCopyright © 2009 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of Americaen
dc.subjectnitrogenen
dc.subjectleachingen
dc.subjectdissolved organic nitrogenen
dc.subjectgroundwateren
dc.subjectAgronomy & Agricultureen
dc.subject.meshHumansen
dc.subject.meshNitratesen
dc.subject.meshSoilen
dc.subject.meshWater Pollutants, Chemicalen
dc.subject.meshWater Pollution, Chemicalen
dc.subject.meshAgricultureen
dc.subject.meshTerminology as Topicen
dc.titleDissolved organic nitrogen : an overlooked pathway of nitrogen loss from agricultural systems?en
dc.typeJournal Article
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciences::300103 Soil chemistryen
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
dc.identifier.doi10.2134/jeq2008.0277en
dc.subject.anzsrc04 Earth Sciencesen
dc.subject.anzsrc05 Environmental Sciencesen
dc.subject.anzsrc06 Biological Sciencesen
dc.relation.isPartOfJournal of Environmental Qualityen
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/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.volume38en
lu.identifier.orcid0000-0002-5978-5274


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