Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/8460
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dc.contributor.authorCottle, Daviden
dc.contributor.authorNolan, John Ven
dc.contributor.authorWeideman, Stephen Gen
dc.date.accessioned2011-09-08T12:30:00Z-
dc.date.issued2011-
dc.identifier.citationAnimal Production Science, 51(6), p. 491-514en
dc.identifier.issn1836-5787en
dc.identifier.issn1836-0939en
dc.identifier.urihttps://hdl.handle.net/1959.11/8460-
dc.description.abstractIn Australia, agriculture is responsible for ~17% of total greenhouse gas emissions with ruminants being the largest single source. However, agriculture is likely to be shielded from the full impact of any future price on carbon. In this review, strategies for reducing ruminant methane output are considered in relation to rumen ecology and biochemistry, animal breeding and management options at an animal, farm, or national level. Nutritional management strategies have the greatest short-term impact. Methanogenic microorganisms remove H₂ produced during fermentation of organic matter in the rumen and hind gut. Cost-effective ways to change the microbial ecology to reduce H₂ production, to re-partition H₂ into products other than methane, or to promote methanotrophic microbes with the ability to oxidise methane still need to be found. Methods of inhibiting methanogens include: use of antibiotics; promoting viruses/bacteriophages; use of feed additives such as fats and oils, or nitrate salts, or dicarboxylic acids; defaunation; and vaccination against methanogens. Methods of enhancing alternative H₂ using microbial species include: inoculating with acetogenic species; feeding highly digestible feed components favouring 'propionate fermentations'; and modifying rumen conditions. Conditions that sustain acetogen populations in kangaroos and termites, for example, are poorly understood but might be extended to ruminants. Mitigation strategies are not in common use in extensive grazing systems but dietary management or use of growth promotants can reduce methane output per unit of product. New, natural compounds that reduce rumen methane output may yet be found. Smaller but more permanent benefits are possible using genetic approaches. The indirect selection criterion, residual feed intake, when measured on ad libitum grain diets, has limited relevance for grazing cattle. There are few published estimates of genetic parameters for feed intake and methane production. Methane-related single nucleotide polymorphisms have yet to be used commercially. As a breeding objective, the use of methane/kg product rather than methane/head is recommended. Indirect selection via feed intake may be more cost-effective than via direct measurement of methane emissions. Life cycle analyses indicate that intensification is likely to reduce total greenhouse gas output but emissions and sequestration from vegetation and soil need to be addressed. Bio-economic modelling suggests most mitigation options are currently not cost-effective.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofAnimal Production Scienceen
dc.titleRuminant enteric methane mitigation: a reviewen
dc.typeJournal Articleen
dc.identifier.doi10.1071/AN10163en
dc.subject.keywordsAnimal Managementen
local.contributor.firstnameDaviden
local.contributor.firstnameJohn Ven
local.contributor.firstnameStephen Gen
local.subject.for2008070203 Animal Managementen
local.subject.seo2008839802 Management of Greenhouse Gas Emissions from Animal Productionen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emaildcottle2@une.edu.auen
local.profile.emailjnolan@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20110330-14460en
local.publisher.placeAustraliaen
local.format.startpage491en
local.format.endpage514en
local.identifier.scopusid79958082274en
local.identifier.volume51en
local.identifier.issue6en
local.title.subtitlea reviewen
local.contributor.lastnameCottleen
local.contributor.lastnameNolanen
local.contributor.lastnameWeidemanen
dc.identifier.staffune-id:dcottle2en
dc.identifier.staffune-id:jnolanen
local.profile.orcid0000-0003-3875-3465en
local.profile.orcid0000-0001-7949-950Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:8637en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleRuminant enteric methane mitigationen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorCottle, Daviden
local.search.authorNolan, John Ven
local.search.authorWeideman, Stephen Gen
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/c38f01f2-4ec5-45a1-acc5-82d7d70a42d9en
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/3b02710d-b945-4271-a41e-e6596dcda9e5en
local.uneassociationUnknownen
local.year.published2011en
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/c38f01f2-4ec5-45a1-acc5-82d7d70a42d9en
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/3b02710d-b945-4271-a41e-e6596dcda9e5en
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