Feedlot Nutrition and Growth and Management

Evaluation of Dietary Laidlomycin Propionate and Synovex Plus Implants for Enhancing Performance of Feedlot Steers

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Abstract

One hundred fifty crossbred yearling steers with an average weight of 876 pounds were used in a 111-day experiment. Steers received either 1) no implant and no ionophore, 2) Synovex Plus¨ and no ionophore, 3) Cattlyst¨ and no implant, 4) Synovex Plus¨ and Cattlyst¨, or 5) Revalor S¨ and Rumensin¨. Implanting steers with ) Synovex Plus¨ increased gain and improved feed efficiency compared with control steers. Compared with steers not implanted, steers implanted with Synovex Plus¨ had heavier carcasses and larger ribeye areas, but similar fat thickness and yield grades. Feeding Cattlyst¨ alone did not increase gain or improve feed conversion, but there was some improvement in feedlot performance when Cattlyst¨ was fed to steers implanted with Synovex Plus¨. Steers implanted with Synovex Plus¨ and fed Cattlyst¨ had superior gains to steers implanted with Revalor S¨ and fed Rumensin¨.

Keywords: ASL R1452

How to Cite:

Trenkle, A., (1998) “Evaluation of Dietary Laidlomycin Propionate and Synovex Plus Implants for Enhancing Performance of Feedlot Steers”, Iowa State University Animal Industry Report 1(1).