Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/23270
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dc.contributor.authorde Raphelis-Soissan, Victoireen
dc.contributor.authorNolan, John Ven
dc.contributor.authorGodwin, Ianen
dc.contributor.authorNewbold, John Ren
dc.contributor.authorPerdok, Hink Ben
dc.contributor.authorHegarty, Rogeren
dc.date.accessioned2018-06-15T13:59:00Z
dc.date.issued2017en
dc.identifier.citationAnimal Feed Science and Technology, v.229, p. 57-64en
dc.identifier.issn0377-8401en
dc.identifier.issn1873-2216en
dc.identifier.urihttps://hdl.handle.net/1959.11/23270en
dc.description.abstractInclusion of nitrate in the diet of ruminants has been effective in reducing enteric emission of the greenhouse gas methane, but increases the risk of nitrate toxicity in the animal. An experiment was conducted to investigate if coating nitrate salts with lipid would reduce risks of nitrite toxicity in sheep without compromising the methane mitigating effect achieved using uncoated nitrate. Three forms of nitrate (uncoated nitrate; coated with palm oil or coated with paraffin wax) were administered intraruminally to sheep, with nitrate toxicity risk being evaluated by determining blood methaemoglobin (MetHb) levels. Nitrate and nitrite concentrations in plasma and rumen fluid, as well as methane and nitrous oxide production were also evaluated. Sheep supplemented with isonitrogenous amounts of urea were used as negative controls. There was no significant effect of palm oil coating on MetHb but coating with paraffin wax lowered MetHb levels, rumen and plasma nitrate concentrations (P < 0.05) relative to concentrations in urea-supplemented sheep. Total VFA concentrations in rumen fluid were unaffected by coating nitrate, but acetate proportion increased while butyrate and propionate proportions declined over time in all treatments after intraruminal nitrate administration (P < 0.05). It is suggested that these changes were caused by the strong capacity of nitrate to act as an electron acceptor. There was substantial variation between animals in ruminal nitrate and nitrite concentrations and in blood MetHb when the same mass of nitrate was administered directly into the rumen, showing that individuals differ in their ability to metabolize nitrate. Whereas methane production over the 22 h period of measurement was unaffected by the treatments, methane production during the first 3 h of measurement post-feeding was reduced similarly by both coated and uncoated nitrate supplements compared to urea. The small amount of supplemented nitrate introduced and the rapidity of nitrate reduction may both explain why methane mitigation was only observed for a short period after administering the treatments. Over 22 h in respiration chambers, nitrous oxide emissions were significantly increased by uncoated nitrate supplements compared to urea (P < 0.05). Nitrous oxide emissions by sheep fed coated nitrate did not differ from those of sheep fed urea. It is concluded that coating dietary nitrate can protect sheep against nitrite toxicity without adversely affecting methane mitigation.en
dc.languageenen
dc.publisherElsevier BVen
dc.relation.ispartofAnimal Feed Science and Technologyen
dc.titleParaffin-wax-coated nitrate salt inhibits short-term methane production in sheep and reduces the risk of nitrite toxicityen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.anifeedsci.2017.04.026en
dc.subject.keywordsAnimal Managementen
dc.subject.keywordsAnimal Nutritionen
local.contributor.firstnameVictoireen
local.contributor.firstnameJohn Ven
local.contributor.firstnameIanen
local.contributor.firstnameJohn Ren
local.contributor.firstnameHink Ben
local.contributor.firstnameRogeren
local.subject.for2008070203 Animal Managementen
local.subject.for2008070204 Animal Nutritionen
local.subject.seo2008960302 Climate Change Mitigation Strategiesen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolAdministrationen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailvderaph2@myune.edu.auen
local.profile.emailjnolan@une.edu.auen
local.profile.emailigodwin@une.edu.auen
local.profile.emailjohn.newbold@volac.comen
local.profile.emailhinkperdok@gmail.comen
local.profile.emailrhegart3@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-chute-20170808-184555en
local.publisher.placeThe Netherlandsen
local.format.startpage57en
local.format.endpage64en
local.peerreviewedYesen
local.identifier.volume229en
local.contributor.lastnamede Raphelis-Soissanen
local.contributor.lastnameNolanen
local.contributor.lastnameGodwinen
local.contributor.lastnameNewbolden
local.contributor.lastnamePerdoken
local.contributor.lastnameHegartyen
dc.identifier.staffune-id:vderaph2en
dc.identifier.staffune-id:jnolanen
dc.identifier.staffune-id:igodwinen
dc.identifier.staffune-id:rhegart3en
local.profile.orcid0000-0001-7949-950Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:23453en
local.identifier.handlehttps://hdl.handle.net/1959.11/23270en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleParaffin-wax-coated nitrate salt inhibits short-term methane production in sheep and reduces the risk of nitrite toxicityen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 6<br />Views: 20<br />Downloads: 0en
local.search.authorde Raphelis-Soissan, Victoireen
local.search.authorNolan, John Ven
local.search.authorGodwin, Ianen
local.search.authorNewbold, John Ren
local.search.authorPerdok, Hink Ben
local.search.authorHegarty, Rogeren
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School of Environmental and Rural Science
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