Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10161749 | The Professional Animal Scientist | 2016 | 4 Pages |
Abstract
An experiment was conducted to determine the effect of 2 implant protocols on steer feedlot performance and carcass characteristics. Over a 2-yr period, 109 crossbred (five-eighths Red Angus, three-eighths Continental; approximately 205 d of age; 242 ± 11 kg) steers were randomly assigned to 1 of 2 implant protocols: (1) Synovex-Choice [100 mg of trenbolone acetate and 14 mg of estradiol benzoate (EB)] implanted at the beginning of the feeding period, followed by Synovex-Plus (200 mg of trenbolone acetate and 28 mg of EB) approximately 100 d later (CHPL), or (2) Synovex-S (200 mg of progesterone and 20 mg of EB) as initial implant, followed by Revalor-S (120 mg of trenbolone acetate and 24 mg of EB) approximately 100 d later (SS). Average daily gain was similar (P = 0.39) for CHPL (1.75 ± kg/d) and SS (1.70 ± kg/d) steers. Yield grade was also not affected (P = 0.16) by treatment, 2.5 and 2.7 ± for CHPL and SS, respectively. Marbling score was similar (P = 0.19) between treatments (501 vs. 525 ± 13 for CHPL and SS, respectively), resulting in a similar percentage of steers grading USDA Choice (CHPL vs. SS, 93 vs. 96 ± 3%; P = 0.42) and upper two-thirds USDA Choice (CHPL vs. SS; 47 vs. 54 ± 7%; P = 0.51). Net revenue was similar (P = 0.59) between CHPL ($1,255.97 ± 23.13) and SS ($1,237.78 ± 23.13) steers. Both implant regimens used in the current experiment resulted in similar feedlot performance and carcass characteristics.
Related Topics
Life Sciences
Agricultural and Biological Sciences
Animal Science and Zoology
Authors
H.R. Nielson, A.F. Summers, R.N. Funston,