Exploring Relationships Between Cow-Calf Management Systems as Affected by Protein Level and Methionine Supplementation in Late Gestation on Cow-Calf Performance Prior to Weaning

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dc.contributor.advisorMandell, Ira
dc.contributor.authorLawson, Kaitlyn
dc.date.accessioned2020-09-04T17:27:31Z
dc.date.available2020-09-04T17:27:31Z
dc.date.copyright2020-09
dc.date.created2020-08-28
dc.degree.departmentDepartment of Animal Biosciencesen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeAnimal and Poultry Scienceen_US
dc.description.abstractThe objective of this study was to assess impacts of protein and methionine nutrition during gestation and two lactational management systems on the performance of cow-calf pairs prior to weaning. Late gestation beef cows were fed to meet 90%, 100%, or 110% of metabolizable protein requirements, with(without) rumen-protected methionine. Postpartum, cow-calf pairs were managed in drylot and fed a ration formulated to meet nutrient requirements, or rotationally grazed on pasture. Prepartum nutrition did not impact calf performance prior to weaning, but may have affected cow performance during lactation. Both gestational protein supply and lactational management system altered methane emissions throughout lactation. Rotationally grazing cow-calf pairs improved pre-weaning calf performance, but reduced cow gains throughout lactation. In addition, nutrition and management did not impact reproductive performance. This study demonstrated that managing cow-calf pairs on pasture prior to weaning produced healthier and heavier calves, without sacrificing dam reproductive performance.en_US
dc.description.sponsorshipBeef Farmers of Ontario
dc.description.sponsorshipOntario Ministry of Agriculture, Food and Rural Affairs
dc.description.sponsorshipAgriculture and Agri-Food Canada
dc.identifier.urihttps://hdl.handle.net/10214/21171
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectMetabolizable Proteinen_US
dc.subjectRumen Protected Methionineen_US
dc.subjectCow-Calfen_US
dc.subjectManagement Systemen_US
dc.subjectLactationen_US
dc.subjectMethaneen_US
dc.subjectCalf Healthen_US
dc.titleExploring Relationships Between Cow-Calf Management Systems as Affected by Protein Level and Methionine Supplementation in Late Gestation on Cow-Calf Performance Prior to Weaningen_US
dc.typeThesisen_US
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