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dc.contributor.authorRomera, A. J.
dc.contributor.authorCichota, R.
dc.contributor.authorBeukes, P. C.
dc.contributor.authorGregorini, Pablo
dc.contributor.authorSnow, V. O.
dc.contributor.authorVogeler, I.
dc.date.accessioned2017-08-24T22:23:34Z
dc.date.available2016-12-08en
dc.date.issued2017-01-12
dc.date.submitted2016-10-22en
dc.identifier.issn0047-2425en
dc.identifier.urihttps://hdl.handle.net/10182/8450
dc.description.abstractIntensification of pastoral dairy systems often means more nitrogen (N) leaching. A number of mitigation strategies have been proposed to reduce or reverse this trend. The main strategies focus on reducing the urinary N load onto pastures or reducing the rate of nitrification once the urine has been deposited. Restricted grazing is an example of the former and the use of nitrification inhibitors an example of the latter. A relevant concern is the cost effectiveness of these strategies, independently and jointly. To address this concern, we employed a modeling approach to estimate N leaching with and without the use of these mitigation options from a typical grazing dairy farm in New Zealand. Three restricted grazing options were modeled with and without a nitrification inhibitor (dicyandiamide, DCD) and the results were compared with a baseline farm (no restricted grazing, no inhibitor). Applying DCD twice a year, closely following the cows after an autumn and winter grazing round, has the potential to reduce annualized and farm-scale N leaching by ~12%, whereas restricted grazing had leaching reductions ranging from 23 to 32%, depending on the timing of restricted grazing. Combining the two strategies resulted in leaching reductions of 31 to 40%. The abatement cost per kilogram of N leaching reduction was NZ$50 with DCD, NZ$32 to 37 for restricted grazing, and NZ$40 to 46 when the two were combined. For the range analyzed, all treatments indicated similar cost per percentage unit of mitigated N leaching, demonstrating that restricted grazing and nitrification inhibitors can be effective when used concurrently.en
dc.format.extent72-79en
dc.language.isoen
dc.publisherCrop Science Society of America, Soil Science Society of America and American Society of Agronomy
dc.relationThe original publication is available from - Crop Science Society of America, Soil Science Society of America and American Society of Agronomy - https://doi.org/10.2134/jeq2016.08.0325en
dc.relation.urihttps://doi.org/10.2134/jeq2016.08.0325en
dc.rightsCopyright © American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. All rights reserved.
dc.subjectnitrogen leachingen
dc.subjectnitrification inhibitorsen
dc.subjectgrazingen
dc.subjectNew Zealanden
dc.subjectAgronomy & Agricultureen
dc.subject.meshAnimalsen
dc.subject.meshCattleen
dc.subject.meshNitrogenen
dc.subject.meshDairyingen
dc.subject.meshFemaleen
dc.subject.meshNitrificationen
dc.subject.meshFarmsen
dc.titleCombining restricted grazing and nitrification inhibitors to reduce nitrogen leaching on New Zealand dairy farmsen
dc.typeJournal Article
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Agricultural Sciences
dc.identifier.doi10.2134/jeq2016.08.0325en
dc.relation.isPartOfJournal of Environmental Qualityen
pubs.issue1en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.volume46en
dc.identifier.eissn1537-2537en
lu.identifier.orcid0000-0002-7084-5223


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