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Effects of dietary vitamin A restriction on the site of fat deposition and fatty acid composition of growing cattle

Gorocica-Buenfil, Milton A
http://rave.ohiolink.edu/etdc/view?acc_num=osu1160488625

Abstract Details

2006, Doctor of Philosophy, Ohio State University, Animal Science.
Four feedlot trials were conducted to evaluate the effects of dietary vitamin A restriction on marbling and beef fatty acid composition in growing cattle. In Exp. 1 the effects of feeding low vitamin A diets and including roasted soybean in the diet on marbling and fatty acid composition were evaluated. Feeding low vitamin A diets tended to increase marbling without affecting carcass back fat and yield grade. It appeared that low vitamin A diets induced hyperplasia in the intramuscular (i.m.) but not in the subcutaneous (s.c.) depot. Feeding low vitamin A diets did not affect fatty acid composition in muscle. In Exp. 2, the effect of duration of dietary vitamin A restriction on the site of fat deposition in Holstein steers was evaluated. Restricting vitamin A intake for 243 d increased i.m fat percentage without affecting s.c. fat deposition or feedlot performance. Restricting vitamin A intake for 131 d or less appeared to be insufficient to affect the site of fat deposition in Holstein steers. In Exp. 3, Angus-based steers were used to evaluate the effect of low vitamin A diets with high-moisture- or dry- corn on marbling and fatty acid composition. Regardless of the corn type used, feeding low vitamin A diets for 145 d increased marbling and quality grade without affecting yield grade, animal health and performance. The CLA content of adipose tissue was not affected by the treatments. In Exp. 4, a feedlot experiment was conducted to evaluate the effects of dietary vitamin A restriction on marbling and immune status. Feeding low vitamin A diets for 216 d to Angus-based steers did not affect feedlot performance, marbling score and immuno-competency. Taken together these experiments suggest that feeding low vitamin A diets to growing cattle may be an effective strategy to increase marbling without affecting s.c. fat deposition. Animal performance, health and immuno-competency were not affected by vitamin A restriction. Feeding low vitamin A diets did not appear to be an effective strategy to increase CLA in ruminant tissues.
Steven Loerch (Advisor)
221 p.
Beef; Vitamin A; Marbling; CLA

Recommended Citations

Citations

  • Gorocica-Buenfil, M. A. (2006). Effects of dietary vitamin A restriction on the site of fat deposition and fatty acid composition of growing cattle [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1160488625

    APA Style (7th edition)

  • Gorocica-Buenfil, Milton. Effects of dietary vitamin A restriction on the site of fat deposition and fatty acid composition of growing cattle. 2006. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1160488625.

    MLA Style (8th edition)

  • Gorocica-Buenfil, Milton. "Effects of dietary vitamin A restriction on the site of fat deposition and fatty acid composition of growing cattle." Doctoral dissertation, Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1160488625

    Chicago Manual of Style (17th edition)

osu1160488625
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© 2006, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.