Abstract
Five hundred seventy-two crossbred beef heifers were used to compare gain and feed efficiency of cattle consuming restricted quantities of energy-dense growing diets containing varying concentrations of Rumensin® and Tylan®. Growing treatments consisted of providing Rumensin at 30 grams per ton of dry matter (R30), or 250 mg per head per day (R250). A third treatment consisted of a Rumensin/Tylan combination, providing 250 and 90 mg per head per day of Rumensin and Tylan, respectively (R250/T90). Average daily gain and feed efficiency during the growing phase were not different (P>0.90) among treatments. Heifers that received R250/T90 during the growing phase exhibited lower dry matter intakes (P0.50), R250/T90 increased finishing-phase feed efficiency by 6.1 and 3.5% compared to R30 and R250, respectively. Liver abscesses were lower (P<0.10) for R250/T90 and R30 than R250.
Keywords: Cattlemen's Day, 2001, Kansas Agricultural Experiment Station contribution, no. 01-318-S, Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service), 873, Beef, Rumensin, Tylan, Limit feeding
How to Cite:
Montgomery, S. P., Farran, T., Sindt, J., Coetzer, C., Pike, J., Trater, A., LaBrune, H., Hunter, R., Laudert, S. & Drouillard, J. S., (2001) “Rumensin®-Tylan® combinations in limit-fed growing diets: effects on growing and finishing performance and carcass characteristics”, Kansas Agricultural Experiment Station Research Reports 1(1), 88-90. doi: https://doi.org/10.4148/2378-5977.1723
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