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Use of n-alkane and fecal near infrared reflectance spectroscopy (fNIRS) methods and traditional prediction equations to estimate intake of RFI-divergent beef cattle grazing annual and perennial pastures

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dc.contributor.supervisor Ominski, Kim (Animal Science) Basarab, John (Animal Science) en_US
dc.contributor.author Byron, Brittany
dc.date.accessioned 2018-12-14T18:02:55Z
dc.date.available 2018-12-14T18:02:55Z
dc.date.issued 2018 en_US
dc.date.submitted 2018-09-18T22:34:28Z en
dc.identifier.uri http://hdl.handle.net/1993/33595
dc.description.abstract These studies i) compared pasture intake of beef heifers via n-alkane, fNIRS (direct, or indirect via fecal C31 and C32) and three equation-based methods; ii) examined the relationship between pasture intake estimates and RFI rankings; and iii) assessed suitability of swath-grazed triticale for n-alkane studies by examining its n-alkane and starch profiles, and morphology (via plant part weights). When grazing meadowbrome pasture, DMINRC was least variable and greater than DMIAlkane, DMIfNIRS and DMIfNIRSC31C32. RFIfat was significantly correlated with direct or indirect fNIRS methods (P < 0.05) for LAC 2015 heifers only. DMIAlkane was correlated to RFIfat in 2015 (P < 0.05) but not in 2016. No equation-based DMI method differed significantly between RFIfat groups. Grazing triticale swaths, Trial 1 starch and C31 concentrations (P ≤ 0.0002) were lower in PM compared to AM samples. In Trial 2, C31 and C32 concentrations and weights differed (P < 0.0001) between plant parts. en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject Residual feed intake en_US
dc.subject RFI en_US
dc.subject Intake en_US
dc.subject GreenFeed en_US
dc.subject Alkane en_US
dc.subject Pasture en_US
dc.subject Extended grazing en_US
dc.subject Swath en_US
dc.subject Beef heifers en_US
dc.subject Beef cows en_US
dc.title Use of n-alkane and fecal near infrared reflectance spectroscopy (fNIRS) methods and traditional prediction equations to estimate intake of RFI-divergent beef cattle grazing annual and perennial pastures en_US
dc.type info:eu-repo/semantics/masterThesis
dc.type master thesis en_US
dc.degree.discipline Animal Science en_US
dc.contributor.examiningcommittee Wittenberg, Karin (Animal Science) en_US
dc.contributor.examiningcommittee Wang, Zhiquan (Animal Science, University of Alberta) en_US
dc.contributor.examiningcommittee Zvomuya, Francis (Soil Science) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note February 2019 en_US


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