Performance, carcass traits and fatty acid profiles of yearling beef cattle supplemented with self-fed byproducts on pasture

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2013-01-01
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Kiesling, Daniel
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Daniel G. Morrical
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Animal Science

The Department of Animal Science originally concerned itself with teaching the selection, breeding, feeding and care of livestock. Today it continues this study of the symbiotic relationship between animals and humans, with practical focuses on agribusiness, science, and animal management.

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The Department of Animal Husbandry was established in 1898. The name of the department was changed to the Department of Animal Science in 1962. The Department of Poultry Science was merged into the department in 1971.

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Due to rising costs of conventional feedstuffs, more research has been focused on feeding non-conventional feedstuffs, such as byproducts of ethanol production or further processing of grains (i.e. soyhulls). Because of the health benefits of conjugated linoleic acid (CLA) shown in studies on laboratory animals, consumer interest in foods enriched with CLA has increased. The objective of this study was to investigate the effects of finishing yearling market steers on pasture supplemented with combinations of self-fed byproducts on live animal performance, carcass traits and fatty acid profiles; specifically CLA. British and Continental crossbred beef steers (n = 162, BW = 404 ± 29 kg) were stocked on cool season grass pastures (5.6 hd/ha) while being supplemented with ad libitum byproduct supplement. Cattle were supplemented with soyhulls and dried distillers grain with solubles (DDGS) or corn and DDGS offered through self-feeders. Supplements were mixed at a 1:1 ratio with a mineral balancer that included Rumensin®. Supplement effects were observed only for fatty acid profiles. Values for CLA were greater for cattle fed soyhulls-DDGS (0.63 vs. 0.44 mg/g muscle, P < 0.0001) compared to cattle supplemented corn-DDGS. Live cattle performance and carcass traits were not affected by supplement. This pasture-based system of production is an opportunity for producers to increase income from non-tillable, erodible acres.

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Tue Jan 01 00:00:00 UTC 2013