Table 3.
Effects steroidal hormone implant on Holstein steers carcass characteristics
| Nonimplanted | Implanted1 | SEM | P-value | |
|---|---|---|---|---|
| n, steers | 35 | 35 | ||
| HCW, kg | 305 | 338 | 5.495 | <0.01 |
| Dressing percent, % | 58.72 | 58.84 | 0.301 | 0.79 |
| Longissimus muscle area, cm2 | 68.25 | 72.36 | 1.114 | 0.01 |
| Marbling | 467 | 461 | 12.326 | 0.71 |
| Longissimus muscle fat concentration2, % | 5.6 | 5.0 | 0.357 | 0.21 |
| Fat thickness, cm | 0.61 | 0.55 | 0.040 | 0.34 |
| KPH, % | 2.86 | 2.56 | 0.109 | 0.05 |
| YG3 | 2.80 | 2.87 | 0.07 | 0.46 |
| Choice and above4, % | 87.88 | 80.00 | 5.681 | 0.39 |
1Holstein steers implanted with 16 mg of E2 and 80 mg of TBA (Component TE-IS with Tylan; Elanco Animal Health, Greenfield, IN) at the start of the trial (day 0), and 24 mg of E2 and 120 mg of TBA (Component TE-S with Tylan; Elanco Animal Health) on day 84 of the trial.
2Crude fat concentration as measured by petroleum ether extract (Ankom Method 2; Ankom Technology).
3Carcass yield grade was calculated (USDA, 1997).
4Percentage of carcasses grading USDA choice or above.