feedlot, steers, implant
The role of implant selection on feedlot performance and carcass traits was evaluated in 200 yearling steers. The steers (initial body weight 709 Ib) were implanted on day 1 or day 70 of the 140-day experiment. Implant combinations (day 1 /day 70) included none/none, Synovex-S + Finaplix-S/Synovex-S + Finaplix-S, Ralgro (36 mg)/Revalor, Synovex-S/Revalor, and Ralgro (72 mg)/Revalor. Day 1 implants increased (P < .05) average daily gain and reduced feed/gain through 70 days on feed. During the 71- to 140-day period implanted cattle exhibited higher (P<.05) average daily gain and lower (P<.05) feed/gain than nonimplanted steers. Specific implant combinations were all of comparable value. Implants increased (P< .05) carcass weights by 55 Ib over nonimplanted steers and increased (P< .05) rib eye area 1 in'. Rib fat thickness and rib eye area/cwt carcass were not affected by implanting. The percentage of choice grade carcasses was reduced (P<.05) from 82.5% to 62.3% by implanting. There were no appreciable differences in carcass traits attributable to specific implant combinations.
Number of Pages
South Dakota State University
Copyright © 1994 South Dakota State University.
Pritchard, R. H., "Effect of Implant Strategies on Feedlot Performance and Carcass Traits of Steers" (1994). South Dakota Beef Report, 1994. 17.