Table 4.
Effects of ByPro1 (tannic acid) dose (g/steer daily) in steam-flaked corn–based diets on beef cattle carcass characteristics
| ByPro dose | P-value3 | |||||
|---|---|---|---|---|---|---|
| Item | Control | 30 g | 60 g | SEM2 | Linear | Quadratic |
| HCW, kg | 387 | 390 | 387 | 3.82 | 0.86 | 0.52 |
| Dressing percent4 | 62.08 | 62.42 | 61.91 | 0.28 | 0.66 | 0.19 |
| 12th-rib fat, cm | 1.48 | 1.55 | 1.46 | 0.10 | 0.87 | 0.43 |
| LM area, cm2 | 93.4 | 92.7 | 94.6 | 2.20 | 0.57 | 0.58 |
| Marbling score5 | 48.4 | 47.8 | 48.7 | 1.18 | 0.87 | 0.55 |
| KPH | 2.0 | 2.1 | 2.1 | 0.03 | 0.38 | 0.12 |
| Calculated yield grade | 3.0 | 3.1 | 2.9 | 0.18 | 0.73 | 0.29 |
| Quality grade6 | ||||||
| Premium Choice, % | 32.0 | 40.1 | 35.1 | 8.09 | 0.76 | 0.44 |
| Choice, % | 52.0 | 48.8 | 52.1 | 8.33 | 0.99 | 0.72 |
| Upper Choice,7 % | 85.5 | 90.3 | 88.6 | 5.58 | 0.62 | 0.55 |
| Select, % | 14.5 | 9.7 | 11.4 | 5.58 | 0.54 | 0.61 |
| Liver score | ||||||
| Total,8 % | 17.0 | 8.3 | 18.5 | 5.9 | 0.85 | 0.13 |
| Abscessed (A+), % | 4.3 | 4.2 | 6.2 | 3.6 | 0.68 | 0.80 |
| Abscessed (A), % | 7.7 | 3.7 | 11.3 | 4.8 | 0.5 | 0.17 |
1
Silvateam USA, Ontario, CA.
2
n = 12.
3
P-values for the linear and quadratic effects of ByPro dose.
4
Dressing percent was calculated using nonshrunk final BW/HCW.
5
30 = sight; 40 = small; 50 = modest; 60 = moderate; 70 = slightly abundant.
6
Quality grade, as determined by USDA personnel.
7
Includes Prime, Premium Choice, and Choice.
8
Includes A+, A, A−, and condemned or flukes.