Table 1.
Composition and nutrient levels of basal total mixed ration (TMR) (dry matter basis).
| Ingredients | Contents, % | Nutrient Levels 2 | Levels |
|---|---|---|---|
| Corn | 45.67 | Metabolizable energy, (MJ/kg) | 10.13 |
| Soybean meal | 11.97 | Crude protein, % | 14.95 |
| Wheat bran | 15 | Ether extract, % | 3.04 |
| Alfalfa hay | 25 | Ash, % | 7.58 |
| Limestone | 1.06 | Neutral detergent fiber, % | 29.22 |
| Salt | 0.3 | Acid detergent fiber, % | 13.99 |
| Premix 1 | 1 | Calcium, % | 1.12 |
| Total | 100 | Phosphorus, % | 0.60 |
| Lysine, % | 0.51 | ||
| Methionine, % | 0.07 | ||
| Threonine, % | 0.49 |
1 The premix provided the following minerals and vitamins for TMR: Cu, 12.5mg/kg; Fe, 90 mg/kg; Zn, 90 mg/kg; Mn, 30 mg/kg; I, 1.0 mg/kg; Se, 0.3 mg/kg; Co, 0.5 mg/kg; vitamin A, 15,000 IU/kg; vitamin D35,000 IU/kg; vitamin E, 50 mg/kg; 2 nutrient levels were measured values, except for metabolizable energy, which was measured and calculated through digestibility and metabolism trials. The energy of CH4 was calculated by equation 10.21 (IPCC, 2006), Ym = 5.5%.