Altering dietary calcium does not influence tenderness in cattle fed Zilmax

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Show simple item record Van Bibber-Krueger, C.L. Miller, K.A. Drouillard, James S. 2013-03-19T17:38:01Z 2013-03-19T17:38:01Z 2013-03-19
dc.description.abstract Tenderness is a key contributor to the sensory attributes of beef, and production practices that decrease tenderness are generally viewed as unfavorable. Zilmax (Merck Animal Health, Summit, NJ) is a potent beta-adrenergic agonist that results in dramatic improvements in carcass weight when fed to cattle, normally for a period of 20 days prior to harvest. Zilmax increases muscle mass at the expense of body fat, and these changes can have favorable effects on retail yield and overall value of beef carcasses. One of the unfavorable side effects of Zilmax is a decrease in meat tenderness. Aging of beef is one means of improving tenderness. During the aging process, proteolytic enzymes degrade the myofibrillar proteins that contribute to the perceptions of tough meat. Activity of these enzymes is stimulated by the presence of calcium ions, and various strategies aimed at increasing intracellular concentrations of calcium have been investigated as a means of improving beef tenderness. The purpose of this experiment was to determine if dietary calcium could be manipulated during the period of Zilmax supplementation as a means of improving meat tenderness. To do this, we eliminated supplemental calcium from the diet in hopes of inducing the secretion of parathyroid hormone. Parathyroid hormone stimulates the mobilization of calcium deposited in skeletal tissue, and we hypothesized that by decreasing dietary calcium we could potentially increase bone mobilization, and in so doing increase the supply of calcium available to proteolytic enzymes within skeletal muscle to enhance activity of these enzymes post-mortem. en_US
dc.language.iso en_US en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 13-162-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1083 en_US
dc.subject Cattle en_US
dc.subject Calcium en_US
dc.subject Tenderness en_US
dc.subject Zilmax en_US
dc.subject Feedlot performance en_US
dc.subject Carcass characteristics en_US
dc.title Altering dietary calcium does not influence tenderness in cattle fed Zilmax en_US
dc.type Conference paper en_US 2013 en_US
dc.citation.epage 69 en_US
dc.citation.spage 67 en_US
dc.description.conference Cattlemen's Day, 2013, Kansas State University, Manhattan, KS, March 1, 2013 en_US
dc.contributor.authoreid jdrouill en_US

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