Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Heifer performance"”.
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Effects of Supplemental Fat on Beef Cow and Heifer Performance, Lactation and Reproduction
… the effects of supplemental fat on beef cow and heifer performance, lactation and reproduction. Supplemental fat sources, differing in fatty acid composition, were evaluated to determine the effects on performance, lactation and reproduction in Angus x Simmental cows (Exp. 1) or heifers (Exp. 2). …
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Impacts of postweaning dry matter intake classification on beef heifer performance, prebreeding intake, and reproduction
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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The effects of extended-release eprinomectin on heifer performance and fescue toxicity and an evaluation of parasite resistance
… Previous work has shown improvements in growth performance of growing animals when treated with either ivermectin or extended-release eprinomectin. No work has determined the mechanism for this improvement though. The objective of this thesis was to determine if parasite resistance to …
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Evaluating long term benefits of genomic selection programs in beef cattle breeding programs in Western Canada
… years to determine the association between sire performance over multiple years, number of calves sired, calf performance, and replacement heifer performance over multiple years. To evaluate sire performance and account for the different numbers of cows and sires in each breeding group, bull …
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Preservative Effects of Covering and Propionic Acid on Alfalfa Haylage in Bunker Silos
… acid on haylage chemical composition and heifer growth. In experiment 1, prop ionic acid was administered to the haylage at the chopper at 0.02% of the fresh forage weight. Chemical composition and ensiling temperature of the haylage were monitored and animal growth was measured with 16 …
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The effects of protein supplementation on performance of beef cattle grazing native mixedgrass range in western Kansas
… frequency during late gestation on performance of spring-calving cows grazing low-quality, dormant native range and supplemented with dried distillers grains with solubles (DDG). Angus × cows (n = 238; mean age = 6 ± 2.5 yr; average initial BW = 618 ± 56.2 kg; average initial BCS = …
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Effect of the maturity at harvest of whole-crop barley and oat on dry matter intake, forage selection, and digestibility when fed to beef cattle
… and offered ad libitum to ruminally cannulated heifers. Diets were supplemented in an attempt to balance crude protein (CP) among treatments. Heifer performance, dry matter intake (DMI), ruminal fermentation parameters, ruminal digestibility, and total tract digestibility were evaluated. In …
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Influence of dietary component manipulation and feed management strategies on growth and rumen development of weaned dairy heifers
<p>Well-developed replacement heifers provide a central foundation for the continued success of the dairy industry. Emphasis on improving pre-weaned calf nutrition has predominated in the industry, but opportunities exist to improve post-weaning heifer nutrition and management. We aimed to evaluate …
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Using different levels of direct-fed microbials during an acidosis challenge and the effects of distillers grains on feeding behavior in the feedlot
… a multitude of health problems and poor animal performance. Direct-fed microbials (DFM) are naturally occurring microorganisms that can be used to improve rumen fermentation and alleviate nutritional disorders. The objective was to determine the effect of different levels of a DFM to mediate a …
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Trace mineral supplementation in cattle: Implications in heifer development, reproductive performance, and fetal programming
… with trace minerals to ensure optimal cattle performance and health. The interactions that trace minerals can have on animal production are complex and multiple factors can impact an animal’s response to mineral supplementation. The objective of this dissertation was to evaluate alternative …