Table 1.
Composition and nutritional profile of the diets used in the experiment1
| Item | Adaptation | Growing | Finishing |
|---|---|---|---|
| Composition, % DM | |||
| Grass silage | 22.0 | 4.8 | 4.7 |
| Ground corn | 38.3 | 46.6 | 53.0 |
| Whole cottonseed | 17.0 | 20.0 | 20.0 |
| Soybean meal | – | 10.0 | – |
| Peanut meal | 11.0 | – | – |
| Cottonseed meal | – | 5.0 | 5.5 |
| Dried distillers grains | – | – | 9.0 |
| Sugarcane bagasse | 7.2 | 3.4 | 3.0 |
| Soybean molasses | – | 5.9 | – |
| Urea | 1.1 | 0.9 | 1.4 |
| Mineral-vitamin mix2 | 3.2 | 3.0 | 3.0 |
| Water | 0.2 | 0.4 | 0.4 |
| Nutritional profile, % DM3 | |||
| DM | 47.9 | 55.2 | 68.3 |
| CP | 17.0 | 17.8 | 15.9 |
| EE | 4.8 | 4.3 | 6.3 |
| NDF | 45.4 | 37.0 | 27.0 |
| ADF | 27.8 | 21.8 | 14.9 |
| Ash | 7.3 | 7.7 | 7.0 |
| TDN4 | 66.0 | 70.0 | 75.0 |
| Starch | 25.1 | 29.4 | 37.7 |
| NEm, Mcal/kg5 | 1.47 | 1.63 | 1.83 |
| NEg, Mcal/kg5 | 0.90 | 1.02 | 1.20 |
1Experimental period lasted 108 d. Adaptation diet was offered from days 0 to 18, growing diet was offered from days 19 to 59, and finishing diet from days 60 to 108.
2Nutrient composition included 27.7% Ca, 1.7% P, 2.8% Na, 1.7% Mg, 2.3% S, 14 mg Cr, 1,240 mg Mn, 1,800 mg Zn, 455 mg Cu, 20 mg Co, 18 mg Se, 38 mg I, 170 mg F, 77,000 IU Vitamin A, 22,600 IU Vitamin E, 22.0 g tannin, 800 mg virginiamycin, and 500 mg monensin sodium.
3DM, dry matter; CP, crude protein; EE, ether extract; NDF, neutral detergent fiber; ADF, acid detergent fiber; TDN, total digestible nutrients; NEm, net energy for maintenance; NEg, NE for gain.
4Calculated based on equations described by Weiss et al. (1992).
5Calculated based on equations described by NASEM (2016).