Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/7617
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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, Ren
dc.date.accessioned2011-06-03T09:33:00Z
dc.date.issued2010en
dc.identifier.citationProceedings of the Australian Society of Animal Production 28th Biennial Conference, v.28, p. 81-81en
dc.identifier.urihttps://hdl.handle.net/1959.11/7617en
dc.description.abstractIn Australia, enteric methane from ruminants represents 11% of total agricultural GH emissions. Practical ways of reducing methane emissions from ruminants in Australia are required to enable the livestock industries to reduce their carbon footprint. When rumen microorganisms ferment feed organic matter, they generate the reduced cofactor NADH which is in equilibrium with rumen H₂. In ruminants, the H₂ is normally removed by the reduction of CO₂ to form methane. However, NO₃⁻ (present in some fresh pasture forage) has a higher affinity for H₂ than CO₂ and, when it is present, H₂ is first used in the reduction of NO₃⁻ to NO₂⁻ and NO₂⁻ to NH₃ thereby reducing the production of methane from CO₂. After reviewing the literature and considering the potential for NO₂⁻ poisoning, Leng (2008) concluded that supplementation of ruminants with NO₃⁻ (as an alternative to urea) is entirely feasible. This study therefore examined digestion, microbial growth and methane production in sheep given a diet of chaffed oaten hay supplemented with isonitrogenous amounts of KNO₃, urea, or both N sources. Eight Merino wethers (38.6 kg, SE 2.4; aged 3 years with long-established rumen fistulas) were housed in metabolism cages in 2 rooms (15-20°C, continuous lighting) and allocated to 2 treatment groups. Two isonitrogenous diets based on chaffed oat hay were prepared. A diet with 4% added KNO3 was prepared by sprinkling a solution of KNO₃ onto the hay while it was stirred in a rotary feed mixer. Another diet (0% KNO₃) was similarly prepared using a urea solution so that 5.54 g N was added per kg hay for both diets. The sheep were gradually acclimated to the NO₃⁻ containing diet over 18 days. The daily ration (1 kg/d air-dry feed) was delivered to both groups of sheep in equal portions each hour by automatic feeders during a 4-day digestibility trial, and every 2 h while the sheep were in respiration chambers to determine their methane output.en
dc.languageenen
dc.publisherASAP: Australian Society of Animal Productionen
dc.relation.ispartofProceedings of the Australian Society of Animal Production 28th Biennial Conferenceen
dc.titleUse of supplementary nitrate to mitigate methane production and provide rumen degradable N for ruminantsen
dc.typeConference Publicationen
dc.relation.conferenceAustralian Society of Animal Production 28th Biennial Conference - Livestock Production in a Changing Environment, Armidale, Australia, 11th - 15th July, 2010en
dc.subject.keywordsAnimal Productionen
local.contributor.firstnameJohn Ven
local.contributor.firstnameRogeren
local.contributor.firstnameJennifer Shirleyen
local.contributor.firstnameIanen
local.contributor.firstnameRen
local.subject.for2008070299 Animal Production not elsewhere classifieden
local.subject.seo2008830399 Livestock Raising not elsewhere classifieden
local.profile.schoolAdministrationen
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.schoolAnimal Scienceen
local.profile.emailjnolan@une.edu.auen
local.profile.emailrhegart3@une.edu.auen
local.profile.emailjhegarty@une.edu.auen
local.profile.emailigodwin@une.edu.auen
local.output.categoryE3en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20110331-11167en
local.publisher.placeOnlineen
local.format.startpage81en
local.format.endpage81en
local.identifier.volume28en
local.contributor.lastnameNolanen
local.contributor.lastnameHegartyen
local.contributor.lastnameHegartyen
local.contributor.lastnameGodwinen
local.contributor.lastnameWoodgateen
dc.identifier.staffune-id:jnolanen
dc.identifier.staffune-id:rhegart3en
dc.identifier.staffune-id:jhegartyen
dc.identifier.staffune-id:igodwinen
local.profile.orcid0000-0001-7949-950Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:7787en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleUse of supplementary nitrate to mitigate methane production and provide rumen degradable N for ruminantsen
local.output.categorydescriptionE3 Extract of Scholarly Conference Publicationen
local.relation.urlhttp://www.asap.asn.au/asap28/files/nolan081.pdfen
local.relation.urlhttp://www.asap.asn.au/asap28/proceedings28.htmlen
local.conference.detailsAustralian Society of Animal Production 28th Biennial Conference - Livestock Production in a Changing Environment, Armidale, Australia, 11th - 15th July, 2010en
local.description.statisticsepubsVisitors: 218<br />Views: 218<br />Downloads: 0en
local.search.authorNolan, John Ven
local.search.authorHegarty, Rogeren
local.search.authorHegarty, Jennifer Shirleyen
local.search.authorGodwin, Ianen
local.search.authorWoodgate, Ren
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School of Environmental and Rural Science
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