The relationship between enteric methane emissions and feed efficiency in growing Angus beef bulls

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dc.contributor.authorUllenboom, Tawnya
dc.contributor.examiningcommitteeOminski, Kim (Animal Science) Crow, Gary (Animal Science) Wittenberg, Karin (Animal Science) Cattani, Doug (Plant Science) Basarab, John (University of Alberta)en_US
dc.contributor.supervisorOminski, Kim (Animal Science) Crow, Gary (Animal Science)en_US
dc.date.accessioned2016-09-14T12:27:45Z
dc.date.available2016-09-14T12:27:45Z
dc.date.issued2016
dc.degree.disciplineAnimal Scienceen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractResidual Feed Intake (RFI) and enteric methane (CH4) emissions were measured over two years on 120 Angus bulls receiving either a silage-hay diet or a silage-grain diet (277±28 and 286±25 d of age in year 1; 249±23 and 250±23 d of age in year 2). Emissions were similar between diets (240 vs. 248  7.9 L d-1, P>0.05; silage-hay vs. silage-grain) and RFI grouping (P>0.05). DMI increased for high RFI bulls versus low RFI bulls (7.68±0.2 and 8.24±0.2 kg DM d-1, low vs. high). Correlations between RFIfat and CH4 emissions were not significant. These findings agree with previous studies and suggest that RFI ranking may be associated with metabolic mechanisms other than fermentation efficiency.en_US
dc.description.noteOctober 2016en_US
dc.identifier.urihttp://hdl.handle.net/1993/31741
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectCH4en_US
dc.subjectMethaneen_US
dc.subjectRFIen_US
dc.subjectResidual Feed Intakeen_US
dc.subjectBeefen_US
dc.subjectCattleen_US
dc.subjectCO2en_US
dc.subjectEnteric Emissionsen_US
dc.titleThe relationship between enteric methane emissions and feed efficiency in growing Angus beef bullsen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
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