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Effects of dietary nitrate on fermentation, methane production and digesta kinetics in sheep

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dc.contributor.authorNolan, John Ven
dc.contributor.authorHegarty, Rogeren
dc.contributor.authorHegarty, Jennifer Shirleyen
dc.contributor.authorGodwin, Ianen
dc.contributor.authorWoodgate, Reginalden
dc.date.accessioned2011-04-27T15:39:00Z
dc.date.issued2010
dc.description.abstractThe effects of dietary nitrate on DM digestion, rumen volatile fatty acid concentrations, microbial protein outflow, rumen water kinetics, and methane production were studied. Eight rumen-cannulated sheep were acclimated to a diet consisting of chaffed oaten hay supplemented with either 4% KNO₃ or 0% KNO₃ but made iso-nitrogenous by the addition of urea. Nitrate supplementation did not affect blood methaemoglobin concentration, DM intake, whole tract or ruminal DM digestibility and the sheep appeared healthy at all times throughout the acclimation and experimental periods. Nitrate did cause changes in rumen fermentation consistent with its acting as a high-affinity hydrogen acceptor, i.e. there was a tendency towards a lower molar percentage of propionate in the rumen volatile fatty acids, and higher molar ratio of acetate to propionate. Methane yield (MY,Lmethane/kgDMintake) was reduced by 23% in KNO₃-supplemented sheep (P<0.05) and these sheep tended to have a shorter mean fluid retention time in the rumen (MRT). There was a significant association between MRT and MY, such that a shorter MRT was associated with a lower MY. The results confirmed that the presence of nitrate in the diet lowers enteric methane production even though there was considerable between-animal variation in gut kinetics and methane production.en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevel#PLACEHOLDER_PARENT_METADATA_VALUE#en
dc.identifier.citationAnimal Production Science, 50(7), p. 801-806en
dc.identifier.doi10.1071/AN09211en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.staffune-id:jnolanen
dc.identifier.staffune-id:rhegart3en
dc.identifier.staffune-id:jhegartyen
dc.identifier.staffune-id:igodwinen
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dc.identifier.urihttps://hdl.handle.net/1959.11/7213
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.subject.keywordsAnimal Nutritionen
dc.titleEffects of dietary nitrate on fermentation, methane production and digesta kinetics in sheepen
dc.typeJournal Articleen
dspace.entity.typePublication
local.contributor.firstnameJohn Ven
local.contributor.firstnameRogeren
local.contributor.firstnameJennifer Shirleyen
local.contributor.firstnameIanen
local.contributor.firstnameReginalden
local.contributor.lastnameNolanen
local.contributor.lastnameHegartyen
local.contributor.lastnameHegartyen
local.contributor.lastnameGodwinen
local.contributor.lastnameWoodgateen
local.description.statisticsepubsVisitors: 174<br />Views: 186<br />Downloads: 5en
local.format.endpage806en
local.format.startpage801en
local.identifier.epublicationsrecordune-20100515-10020en
local.identifier.issue7en
local.identifier.scopusid77956377223en
local.identifier.unepublicationidune:7379en
local.identifier.volume50en
local.output.categoryC1en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.peerreviewedYesen
local.profile.emailjnolan@une.edu.auen
local.profile.emailrhegart3@une.edu.auen
local.profile.emailjhegarty@une.edu.auen
local.profile.emailigodwin@une.edu.auen
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local.profile.orcid0000-0001-7949-950Xen
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local.profile.roleauthoren
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local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolOffice of Faculty of Science, Ag, Business and Lawen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.school#PLACEHOLDER_PARENT_METADATA_VALUE#en
local.publisher.placeAustraliaen
local.record.institutionUniversity of New Englanden
local.record.placeauen
local.search.authorNolan, John Ven
local.search.authorHegarty, Rogeren
local.search.authorHegarty, Jennifer Shirleyen
local.search.authorGodwin, Ianen
local.search.authorWoodgate, Reginalden
local.subject.for2008070204 Animal Nutritionen
local.subject.seo2008830310 Sheep - Meaten
local.subject.seo2008830311 Sheep - Woolen
local.title.maintitleEffects of dietary nitrate on fermentation, methane production and digesta kinetics in sheepen
local.uneassociationUnknownen
local.year.published2010en
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