Dose-response effects of vitamin E supplementation on growth performance and meat characteristics in beef and dairy steers

Autor:	M J Garber, W. M. Pumfrey, G. T. Schelling, P. M. Davidson, R A Roeder
Rok vydání:	1996
Předmět:	Medius Animal science Food Animals Vitamin e supplementation White light Animal Science and Zoology Food science Biology biology.organism_classification Crossbreed
Zdroj:	Canadian Journal of Animal Science. 76:63-72
ISSN:	1918-1825 0008-3984
DOI:	10.4141/cjas96-009
Popis:	This study examined dose-response effects of supplemental dietary dl-α-tocopheryl acetate (VE) on growth performance, immune response, and carcass and meat sensory characteristics in two breeds of cattle. Seventy-five crossbred beef steers (361 ± 22 kg) were blocked by weight, randomly assigned to one of five treatment groups, and fed a ration supplemented with 0, 250, 500, 1000 or 2000 IU VE steer−1 d−1. Sixty Holstein steers (366 ± 22 kg were similarly blocked and allocated (no 250 IU treatment). Four days post-slaughter the left sirloin subprimal of each steer was removed and vacuum packaged. On day 13, small cores were cut from the gluteus medius (GM) and packaged with O2-permeable wrap; these were then displayed under 45-W natural white light for up to 10 d at 4 °C. Serum α-tocopherol increased (P 0.10) by VE. Dairy steers receiving 1000 IU d−1 had darker (P 0.10) of VE on sensory attributes of frozen steaks. Surface metmyoglobin formation was deterred by VE supplementation in meat from beef (linear, P 0.10) steers. Lipid oxidation was suppressed (linear, P −1). Immune response increased (P
Databáze:	OpenAIRE
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