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Effects of glycerin on receiving performance and health status of beef steers and nutrient digestibility and rumen fermentation characteristics of growing steers

E, Hales Kristin, J, Kraich K, G, Bondurant R, E, Meyer B, K, Luebbe M, S, Brown M, A, Cole N, C, MacDonald J
Journal of animal science 2013 v.91 no.9 pp. 4277
animal health, beef, bovine respiratory disease, calves, corn, diet, digestibility, glycerol, health status, infectious bovine rhinotracheitis, mortality, rumen fermentation, starch, steers
One experiment was conducted to evaluate the influence of crude glycerin (GLY) on animal performance and health when used as a partial replacement for roughage in receiving diets. The second experiment was conducted using ruminally and duodenally cannulated steers in a 4 x 4 Latin square to determine the site of nutrient digestion, and ruminal fermentation characteristics when GLY replaced roughage at 0, 2.5, 5, and 10% of diet DM. In Exp. 1, calves (initial BW=245 kg) were fed treatment diets over a 42-d period that consisted of a control diet based on steam-flaked corn (SFC) with GLY inclusion in replacement of dietary roughage at 0, 5, and 10% of diet DM. A linear reduction in DMI was observed as GLY increased (P=0.01). Crude GLY incorporation tended to improve G:F in a linear manner (P=0.07); efficiency was improved 5.4 and 4.7% at 5 and 10% crude GLY. The number of animals receiving treatment for bovine respiratory disease (BRD) did not differ among treatments (P=0.67). Furthermore, there were no differences among treatments for mortality (P=0.58) or the frequency of calves that were seropositive for serum antibody titers to infectious bovine rhinotracheitis on d 28 (P>0.14). In Exp. 2, apparent OM and apparent and true starch digestibility increased linearly (P