Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
The Effect Of Delaying Initial Feedlot Implant On Body Weight, Average Daily Gain, And Carcass Characteristics Of Calf-Fed Steers, W. Griffin, D. C. Adams, R. N. Funston
The Effect Of Delaying Initial Feedlot Implant On Body Weight, Average Daily Gain, And Carcass Characteristics Of Calf-Fed Steers, W. Griffin, D. C. Adams, R. N. Funston
West Central Research and Extension Center, North Platte
Two experiments were conducted to determine the effect of delaying initial feedlot implant on BW, ADG, and carcass characteristics. At receiving, steers were assigned to 1 of 2 treatments: 1) implant at feedlot entry (NORM) or 2) implant 30 d after feedlot entry (DELAY). In Exp. 1, steers (n = 200) were not implanted until feedlot entry; however, in Exp. 2 steers (n = 209) were implanted at approximately 50 d of age. In Exp. 1, there was a tendency (P = 0.11) for BW at d 30 to be heavier (10 kg) for NORM compared with DELAY; however, all …
Evaluation Of Revalor-Ih And Revalor-Is As Initial Implants Compared With Traditional Initial Implants For Finishing Heifers And Steers, J. D. Folmer, T. B. Farran, G. E. Erickson, T. J. Klopfenstein, C. D. Reinhardt, B. D. Dicke, J. S. Drouillard, M. N. Streeter, J. T. Vasconcelos
Evaluation Of Revalor-Ih And Revalor-Is As Initial Implants Compared With Traditional Initial Implants For Finishing Heifers And Steers, J. D. Folmer, T. B. Farran, G. E. Erickson, T. J. Klopfenstein, C. D. Reinhardt, B. D. Dicke, J. S. Drouillard, M. N. Streeter, J. T. Vasconcelos
Department of Animal Science: Faculty Publications
Two commercial feedlot experiments were conducted to compare performance and carcass characteristics of feedlot heifers and steers using 2 implant strategies. In Exp. 1, heifers (n = 1,124; initial BW = 279 ± 5 kg) were administered either Revalor-IH [Intervet/ Schering Plough Animal Health, DeSoto, KS; 8 mg of estradiol (E2) and 80 mg of trenbolone acetate (TA)] or Synovex-H (Fort Dodge Animal Health, Overland Park, KS; 20 mg of estradiol benzoate and 200 mg of testosterone propionate) at initial processing, with both treatment groups receiving Revalor-200 (20 mg E2 and 200 mg TA) as the common terminal implant 81 …
A Comparison Of Melengestrol Acetate Fed At Two Dose Levels To Feedlot Heifers, G. E. Sides, J. T. Vasconcelos, R. C. Borg, O. A. Turgeon, W. C. Koers, M. S. Davis, K. Vander Pol, D. J. Weigel, C. M. Tucker
A Comparison Of Melengestrol Acetate Fed At Two Dose Levels To Feedlot Heifers, G. E. Sides, J. T. Vasconcelos, R. C. Borg, O. A. Turgeon, W. C. Koers, M. S. Davis, K. Vander Pol, D. J. Weigel, C. M. Tucker
Panhandle Research and Extension Center
A randomized complete block design was used to compare the effects of feeding melengestrol acetate (MGA) at 0.4 (0.4M) and 0.5 (0.5M) mg/d per head on feedlot performance, estrus activity, and carcass characteristics of commercial beef heifers (n = 1,418; 10 pens/ treatment). Within 48 h of arrival at the research site, heifers were assigned to treatment, processed according to feedlot protocol, and administered an abortifacient. After adaptation to a 95% concentrate diet, MGA was supplied at either 0.4 or 0.5 mg/head daily. Estrus activity was monitored twice daily and summarized as a count of heifers showing estrus within a …
Effect Of Feeding Melengestrol Acetate, Monensin, And Tylosin On Performance, Carcass Measurements, And Liver Abscesses Of Feedlot Heifers, G. E. Sides, R. S. S. Swingle, J. T. Vasconcelos, R. C. Borg, W. M. Moseley
Effect Of Feeding Melengestrol Acetate, Monensin, And Tylosin On Performance, Carcass Measurements, And Liver Abscesses Of Feedlot Heifers, G. E. Sides, R. S. S. Swingle, J. T. Vasconcelos, R. C. Borg, W. M. Moseley
Panhandle Research and Extension Center
Approximately 4,000 yearling heifers (initial BW = 306 ± 1.9 kg) were randomly allotted into 4 treatment groups to determine the effect of melengestrol acetate (MGA) on feedlot performance and carcass parameters. Treatments included a diet containing monensin (Rumensin) and tylosin (Tylan; RT) fed during the entire feeding period; RT plus MGA (RTM) also fed during the entire feeding period; RT withdrawn 35 d preslaughter (RTwd); and RTM withdrawn 35 d preslaughter (RTMwd). All cattle were implanted at arrival with Revalor-IH and reimplanted with Revalor-200, and were fed a standard feedlot finishing diet (that met or exceeded 1996 NRC requirements) …