Show simple item record

dc.contributor.authorCameron Len
dc.contributor.authorChagunda MGGen
dc.contributor.authorRoberts DJen
dc.contributor.authorLee MAen
dc.date.accessioned2018-03-08T09:54:16Z
dc.date.available2018-03-08T09:54:16Z
dc.date.issued2018
dc.identifier.citation73:3
dc.identifier.issn0142-5242
dc.identifier.urihttps://doi.org/10.1111/gfs.12353
dc.identifier.urihttp://hdl.handle.net/11262/11413
dc.description.abstractThere have been reductions in grazing cattle and corresponding increases in mixed diets across many regions. Mixed diets consist of silage, grains, legumes and other herbaceous plants (termed total mixed ration, TMR). TMR has been associated with increased milk yields but has also been linked to increased enteric methane production. We measured milk yields and methane production from high-yielding Holstein- Friesian cattle after substituting 29%–36% of a TMR diet with grass. Two feeding treatments were compared with a diet of TMR: grass grazed at pasture and grass cut in the field and delivered to housed cattle (termed cut-and-carry). Each feeding treatment was fed to 15 cattle, and the experiment was conducted in South-west Scotland. Using a laser methane detector, we measured a twofold and fourfold decline in enteric methane production for the cut-and-carry and grazing groups, respectively, when the animals consumed grass. TMR was consumed by both grassfed groups overnight, so daily values were adjusted to include elevated methane production during this period. This revealed that methane production for the cutand- carry and grazing groups was 17% and 39% lower than for the TMR-fed group respectively. Milk yields were maintained for all three groups, and the efficiency of milk production per unit of methane was substantially greater for the two grass-fed groups. A shift away from exclusively feeding TMR by adding fresh grass to the diets of cattle could contribute to meeting emissions targets and could also represent an economically sustainable climate change mitigation strategy.en
dc.language.isoenen
dc.publisherWileyen
dc.relation.isformatof14789en
dc.relation.ispartofGrass and Forage Scienceen
dc.rightsCopyright © 2018 John Wiley & Sons Ltd. This is the peer reviewed version of the above article, which has been published in final form at https://doi.org/10.1111/gfs.12353. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
dc.subjectCut-and-carryen
dc.subjectEnteric methaneen
dc.subjectForageen
dc.subjectGreenhouse gasesen
dc.subjectZero grazingen
dc.titleA comparison of milk yields and methane production from three contrasting high-yield dairy cattle feeding regimes: cut-and-carry, partial grazing and total mixed rationen
dc.typeArticleen
dc.description.versionAccepted manuscript
dc.extent.pageNumbers789-797
rioxxterms.publicationdate2018-03-02
rioxxterms.typeJournal Article/Reviewen
dcterms.dateAccepted2018-01-23
refterms.accessExceptionNAen
refterms.dateDeposit2018-03-08
refterms.dateEmbargoEnd2019-03-02
refterms.dateFreeToDownload2019-03-02
refterms.dateFreeToRead2019-03-02
refterms.dateToSearch2019-03-02
refterms.depositExceptionNAen
refterms.panelUnspecifieden
refterms.technicalExceptionNAen
refterms.versionAMen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record