steer, feedlot, inophore
The relative effectiveness of three ionophore feeding strategies was compared in yearling steers. Six pens of 8 steers were assigned to each of the following treatments: A) no ionophore fed, B) lasalocid (33 glT) fed for 28 days and then replaced with laidlomycin propionate (1 1 g/T) for the balance of time on feed; C) monensin (28 g/T) fed throughout, and D) laidlomycin propionate (11 g/T) fed throughout. A five diet step-up program was used that culminated in a final diet based on cracked and high moisture corn and 7% ground hay. lonophores increased (P< .05) ADG (3.9%) and carcass weight and lowered (P<.05) feed/gain 4.5% during the 135-day feeding period. Among ionophore treatments, monensin resulted in a lower (P< .05) cumulative ADG and carcass weight than diets containing laidlomycin propionate. Three of the four steers removed from the trial due to metabolic disorders were from the no ionophore treatment.
Number of Pages
South Dakota State University
Copyright © 1996 South Dakota State University.
Pritchard, R. H., "Inophore Programs for Finishing Yearling Steers" (1996). South Dakota Beef Report, 1996. 5.