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Effects of nutritional management regimen and residual feed intake rank on cow performance during mid to late gestation and pre-weaning calf performance

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dc.contributor.advisor Mandell, Ira
dc.contributor.author Devos, Joshua
dc.date.accessioned 2018-07-17T17:07:54Z
dc.date.available 2018-07-17T17:07:54Z
dc.date.copyright 2018-07
dc.date.created 2018-07-05
dc.date.issued 2018-07-17
dc.identifier.uri http://hdl.handle.net/10214/13897
dc.description.abstract This study’s main objective was to determine whether strategic supplementation of low-quality roughage diets was sufficient for cows to bear and wean a healthy calf on a yearly basis and maintain overall performance, for the ultimate goal of increasing profitability for cow-calf producers. Residual feed intake (RFI) classification was also examined, including the extent of reranking across three years and physiological phases when different nutritional management regimens were used. Mid to late gestation cows were fed diets adequate or deficient in energy, along with testing supplementation frequency. While strategic supplementation of low-quality roughage diets was able to maintain body condition, reproductive performance, and serum metabolites, gains and feed intake were greater for cows fed a 70% haylage/30% straw diet fed ad libitum. Extensive reranking of RFI classification occurred due to effects of year along with nutritional management regimen. RFI classification in 2015 did not affect 2016 and 2017 cow performance. en_US
dc.description.sponsorship Beef Farmers of Ontario (BFO); NSERC CRD Program en_US
dc.language.iso en en_US
dc.subject beef cow en_US
dc.subject low-quality diets en_US
dc.subject RFI en_US
dc.title Effects of nutritional management regimen and residual feed intake rank on cow performance during mid to late gestation and pre-weaning calf performance en_US
dc.type Thesis en_US
dc.degree.programme Animal and Poultry Science en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Animal Biosciences en_US
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