Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/53119
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dc.contributor.authorVillar, Len
dc.contributor.authorHegarty, Rogeren
dc.contributor.authorVan Tol, Men
dc.contributor.authorGodwin, Ien
dc.contributor.authorNolan, Jen
dc.date.accessioned2022-08-05T00:18:08Z-
dc.date.available2022-08-05T00:18:08Z-
dc.date.issued2020-
dc.identifier.citationAnimal Production Science, v.60 (2)en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.urihttps://hdl.handle.net/1959.11/53119-
dc.description.abstractIt was hypothesised that the inclusion of nitrate (NO<sub>3</sub><sup>–</sup>) or cysteamine hydrochloride (CSH) in a protein deficient diet (4.8% crude protein; CP) would improve the productivity of sheep while reducing enteric methane (CH<sub>4</sub>) emissions. A complete randomised designed experiment was conducted with yearling Merino sheep (<i>n</i> = 24) consuming a protein deficient wheaten chaff control diet (CON) alone or supplemented with 1.8% nitrate (NO<sub>3</sub><sup>–</sup>; DM basis), 0.098% urea (Ur, DM basis) or 80 mg cysteamine hydrochloride/kg liveweight (CSH). Feed intake, CH<sub>4</sub> emissions, volatile fatty acids (VFA), digesta kinetics and NO<sub>3</sub><sup>–</sup>, nitrite (NO<sub>2</sub><sup>–</sup>) and urea concentrations in plasma, saliva and urine samples were measured. There was no dietary effect on animal performance or digesta kinetics (<i>P</i> > 0.05), but adding NO<sub>3</sub><sup>–</sup> to the CON diet reduced methane yield (MY) by 26% (<i>P</i> = 0.01). Nitrate supplementation increased blood MetHb, plasma NO<sub>3</sub> <sup>–</sup> and NO<sub>2</sub><sup>–</sup> concentrations (<i>P</i> < 0.05), but there was no indication of NO<sub>2</sub><sup>–</sup> toxicity. Overall, salivary NO<sub>3</sub><sup>–</sup> concentration was greater than plasma NO<sub>3</sub><sup>–</sup> (<i>P</i> < 0.05), indicating that NO<sub>3</sub><sup>–</sup> was concentrated into saliva. Our results confirm the role of NO<sub>3</sub><sup>–</sup> as an effective additive to reduce CH<sub>4</sub> emissions, even in a highly protein-deficient diet and as a source of additional nitrogen (N) for microbial protein synthesis via N-recycling into saliva and the gut. The role of CSH as an additive in low quality diets for improving animal performance and reducing CH<sub>4</sub> emissions is still unclear.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titleDietary nitrate metabolism and enteric methane mitigation in sheep consuming a protein-deficient dieten
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN18632en
dc.subject.keywordssalivaen
dc.subject.keywordscysteamine hydrochlorideen
dc.subject.keywordsnitrate recyclingen
dc.subject.keywordsplasmaen
dc.subject.keywordsruminantsen
dc.subject.keywordsAgriculture, Dairy & Animal Scienceen
dc.subject.keywordsAgricultureen
local.contributor.firstnameLen
local.contributor.firstnameRogeren
local.contributor.firstnameMen
local.contributor.firstnameIen
local.contributor.firstnameJen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailrhegart3@une.edu.auen
local.profile.emailigodwin@une.edu.auen
local.profile.emailjnolan@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.publisher.placeAustraliaen
local.identifier.scopusid85072617229en
local.identifier.volume60en
local.identifier.issue2en
local.contributor.lastnameVillaren
local.contributor.lastnameHegartyen
local.contributor.lastnameVan Tolen
local.contributor.lastnameGodwinen
local.contributor.lastnameNolanen
dc.identifier.staffune-id:rhegart3en
dc.identifier.staffune-id:igodwinen
dc.identifier.staffune-id:jnolanen
local.profile.orcid0000-0001-7949-950Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:1959.11/53119en
local.date.onlineversion2019-09-20-
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleDietary nitrate metabolism and enteric methane mitigation in sheep consuming a protein-deficient dieten
local.relation.fundingsourcenoteLaura Villar was supported by Instituto Nacional de Tecnología Agropecuaria (INTA, Argentina).en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorVillar, Len
local.search.authorHegarty, Rogeren
local.search.authorVan Tol, Men
local.search.authorGodwin, Ien
local.search.authorNolan, Jen
local.uneassociationYesen
local.atsiresearchNoen
local.sensitive.culturalNoen
local.identifier.wosid000505621700002en
local.year.available2019en
local.year.published2020en
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/fc25862e-179d-4aa5-8741-2d3b535729ffen
local.subject.for2020300303 Animal nutritionen
local.subject.seo2020100412 Sheep for meaten
local.subject.seo2020100199 Environmentally sustainable animal production not elsewhere classifieden
Appears in Collections:Journal Article
School of Environmental and Rural Science
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