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dc.contributor.authorSmith, Paul E.
dc.contributor.authorKelly, Alan K.
dc.contributor.authorKenny, David A.
dc.contributor.authorWaters, Sinéad M.
dc.identifier.citationSmith PE, Kelly AK, Kenny DA and Waters SM (2022) Enteric methane research and mitigation strategies for pastoral-based beef cattle production systems. Front. Vet. Sci. 9:958340. doi: 10.3389/fvets.2022.958340en_US
dc.description.abstractRuminant livestock play a key role in global society through the conversion of lignocellulolytic plant matter into high-quality sources of protein for human consumption. However, as a consequence of the digestive physiology of ruminant species, methane (CH4), which originates as a byproduct of enteric fermentation, is accountable for 40% of global agriculture's carbon footprint and ~6% of global greenhouse gas (GHG) emissions. Therefore, meeting the increasing demand for animal protein associated with a growing global population while reducing the GHG intensity of ruminant production will be a challenge for both the livestock industry and the research community. In recent decades, numerous strategies have been identified as having the potential to reduce the methanogenic output of livestock. Dietary supplementation with antimethanogenic compounds, targeting members of the rumen methanogen community and/or suppressing the availability of methanogenesis substrates (mainly H2 and CO2), may have the potential to reduce the methanogenic output of housed livestock. However, reducing the environmental impact of pasture-based beef cattle may be a challenge, but it can be achieved by enhancing the nutritional quality of grazed forage in an effort to improve animal growth rates and ultimately reduce lifetime emissions. In addition, the genetic selection of low-CH4-emitting and/or faster-growing animals will likely benefit all beef cattle production systems by reducing the methanogenic potential of future generations of livestock. Similarly, the development of other mitigation technologies requiring minimal intervention and labor for their application, such as anti-methanogen vaccines, would likely appeal to livestock producers, with high uptake among farmers if proven effective. Therefore, the objective of this review is to give a detailed overview of the CH4 mitigation solutions, both currently available and under development, for temperate pasture-based beef cattle production systems. A description of ruminal methanogenesis and the technologies used to estimate enteric emissions at pastures are also presented.en_US
dc.description.sponsorshipFunding and support from the FACCE ERA-GAS RumenPredict grant (16/RD/ERAGAS/1RUMENPREDICTROI 2017) and Horizon 2020 MASTER grant (818368) is acknowledged. PS was funded by a Teagasc Walsh Scholarship (RMIS 0364).
dc.publisherFrontiers Media SAen_US
dc.relation.ispartofseriesFrontiers in Veterinary Science;
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.subjectBeef cattleen_US
dc.subjectrumen microbiomeen_US
dc.titleEnteric methane research and mitigation strategies for pastoral-based beef cattle production systemsen_US
dc.contributor.sponsorEuropean Unionen_US
dc.contributor.sponsorTeagasc Walsh Scholarship Programmeen_US
dc.contributor.sponsorGrantNumber16/RD/ERAGAS/1RUMENPREDICTROI 2017en_US
dc.contributor.sponsorGrantNumberHorizon 2020 MASTER grant (818368)en_US
dc.contributor.sponsorGrantNumberRMIS 0364en_US
dc.source.journaltitleFrontiers in Veterinary Science

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