Table 1.
Ingredients and nutritional composition of experimental diets.
| Item | Dietary concentrate- to-forage ration |
|
|---|---|---|
| 30:70 | 70:30 | |
| Ensiled maize stalks | 57.0 | 19.0 |
| Chinese ryegrass hay | 4.0 | 6.0 |
| Alfalfa pellets | 9.0 | 5.0 |
| Steam-flaked maize | 13.0 | 54.0 |
| Soybean curb residue | 15.2 | 13.7 |
| Mineral mix1 | 1.8 | 2.3 |
| Nutrition composition | ||
| ME2 (MJ/kg) | 9.07 | 11.70 |
| CP (%DM) | 12.7 | 12.7 |
| NDF (%DM) | 54.2 | 35.3 |
| ADF (%DM) | 25.3 | 19.2 |
| Starch (%DM) | 12.2 | 40.9 |
| Ca (%DM) | 0.64 | 0.63 |
| P (%DM) | 0.32 | 0.33 |
(1) ME, metabolizable energy; CP, crude protein; NDF, neutral detergent fiber; ADF, acid detergent fiber. (2) Mineral mix contained 18.50% Ca, 6.00% P, 4.2% Mg, 1.4% K, 2.6% S, 7.5% Na, 12.0% Cl, 30 mg/kg of Se, 0.25% Zn, 0.25% Fe, 0.25% Mn, 1,100 mg/kg of Cu, 15 mg/kg of I, 265,000 IU/kg of vitamin A, 110,200 IU/kg of vitamin D, and 2,300 IU/kg of vitamin K.