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.authorByron, Brittany
dc.contributor.examiningcommitteeWittenberg, Karin (Animal Science)en_US
dc.contributor.examiningcommitteeWang, Zhiquan (Animal Science, University of Alberta)en_US
dc.contributor.examiningcommitteeZvomuya, Francis (Soil Science)en_US
dc.contributor.supervisorOminski, Kim (Animal Science) Basarab, John (Animal Science)en_US
dc.date.accessioned2018-12-14T18:02:55Z
dc.date.available2018-12-14T18:02:55Z
dc.date.issued2018en_US
dc.date.submitted2018-09-18T22:34:28Zen
dc.degree.disciplineAnimal Scienceen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThese 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.description.noteFebruary 2019en_US
dc.identifier.urihttp://hdl.handle.net/1993/33595
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectResidual feed intakeen_US
dc.subjectRFIen_US
dc.subjectIntakeen_US
dc.subjectGreenFeeden_US
dc.subjectAlkaneen_US
dc.subjectPastureen_US
dc.subjectExtended grazingen_US
dc.subjectSwathen_US
dc.subjectBeef heifersen_US
dc.subjectBeef cowsen_US
dc.titleUse 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 pasturesen_US
dc.typemaster thesisen_US
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