Restricting Vitamin A in cattle diets improves beef carcass marbling and USDA quality and yield grades

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dc.contributor.author Arnett, A.M.
dc.contributor.author Daniel, M.J.
dc.contributor.author Dikeman, Michael E.
dc.date.accessioned 2009-12-09T19:15:56Z
dc.date.available 2009-12-09T19:15:56Z
dc.date.issued 2009-12-09T19:15:56Z
dc.identifier.uri http://hdl.handle.net/2097/2262
dc.description.abstract Marbling continues to be a major factor affecting profitability for beef producers, processors, retailers, and restaurateurs. However, feeding animals to ‘fatten’ is quite inefficient, requiring about 2.25 times more energy than is needed for producing lean muscle. For the cattle feeding industry to be sustainable in the future, increases in marbling must be accomplished without increasing days on feed, slaughter age carcass weight, and fatness and without sacrificing feed efficiency and carcass cutability. A 2002 survey of feedlot nutritionists revealed that most recommended supplementation of vitamin A to feedlot cattle at levels exceeding the guidelines of the National Research Council (NRC) by three to five times. Because vitamin A fortification of cattle diets is an inexpensive method used to improve the immune response of receiving cattle, it is likely that few have considered the negative consequences of over-supplementing vitamin A on marbling and carcass quality grades of feedlot cattle. The objective of our research was to evaluate the effects of supplementing vitamin A at either zero (NA) or seven times (HA) the NRC-recommended level in feedlot diets and age at weaning on carcass marbling development and USDA quality grade of crossbred beef steers. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen's Day, 2008 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 08-212-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 995 en_US
dc.subject Beef en_US
dc.subject Cattle en_US
dc.subject Marbling en_US
dc.subject Vitamin A en_US
dc.title Restricting Vitamin A in cattle diets improves beef carcass marbling and USDA quality and yield grades en_US
dc.type Conference paper en_US
dc.date.published 2008 en_US
dc.citation.epage 27 en_US
dc.citation.spage 24 en_US
dc.description.conference Cattlemen's Day, 2008, Kansas State University, Manhattan, KS, March 7, 2008 en_US
dc.contributor.authoreid mdikeman en_US


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