Table 1.
Nutrients composition of three energy diets used during experiment.
| Item | Treatment 1 | ||
|---|---|---|---|
| LE (%) | ME (%) | HE (%) | |
| Ingredient, % of DM | |||
| Corn | 32.00 | 44.00 | 56.00 |
| Corn germ | 28.00 | 20.00 | 12.00 |
| Wheat bran | 4.80 | 4.80 | 4.80 |
| DDGS 2 | 9.00 | 5.00 | 3.00 |
| Prickly ash seed | 4.00 | 4.00 | 4.00 |
| Cottonseed meal | 12.00 | 12.00 | 10.00 |
| Soybean meal | 5.30 | 5.30 | 5.30 |
| White stone powder | 2.00 | 2.00 | 2.00 |
| Dicalcium phosphate | 0.60 | 0.60 | 0.60 |
| Urea | 0.50 | 0.50 | 0.50 |
| Sodium bicarbonate | 1.00 | 1.00 | 1.00 |
| Premix 3 | 0.80 | 0.80 | 0.80 |
| Nutrient composition, % of DM | |||
| Crude protein | 16.53 | 16.74 | 17.21 |
| Crude fat | 3.73 | 4.18 | 5.57 |
| Acid detergent fiber | 4.54 | 4.14 | 3.72 |
| Neutral detergent fiber | 15.93 | 13.15 | 12.32 |
| Phosphorus | 0.31 | 0.34 | 0.36 |
| Calcium | 0.64 | 0.84 | 0.75 |
| NEg 4 (MJ/kg) | 5.5 | 6.2 | 6.9 |
1 LE, low energy level; ME, medium energy level; HE, high energy level; 2 DDGS, distillers dried grains with solubles; 3 Premix was provided per kilogram of total diet DM, and the composition is as follow: 22,520 IU of vitamin A, 1,920 IU of vitamin D3, 18 IU of vitamin E, 0.36 IU of vitamin K3, 21.2 mg of D-calcium pantothenate, 9 mg of Cu, 132.8 mg of Zn, 240 mg of Fe and 8 mg of Mn, 0.28 mg of Co; 4 NEg is calculated according to Feeding Standard of Beef Cattle (NY/T 815-2004), others were measured values.