Table 1.
Ingredients and chemical composition of the diets
| Diets1 | ||
|---|---|---|
| Item | BS | AH |
| Ingredient composition, % of DM | ||
| Barley straw | 10.0 | — |
| Alfalfa hay | — | 19.0 |
| Corn, ground | 35.0 | 41.5 |
| Barley, ground | 43.0 | 31.5 |
| Soybean meal, 44%CP | 9.0 | 5.0 |
| Salt | 0.7 | 0.7 |
| Sodium bicarbonate | 1.0 | 1.0 |
| Calcium carbonate | 0.5 | 0.5 |
| Dicalcium phosphate | 0.4 | 0.4 |
| Vitamin–mineral premix2 | 0.4 | 0.4 |
| Chemical composition, % DM | ||
| CP | 12.0 | 13.0 |
| NDF | 23.8 | 21.2 |
| ADF | 7.7 | 8.8 |
| Ether extract | 2.0 | 2.0 |
| Ash | 4.8 | 7.5 |
| NFC3 | 57.4 | 56.3 |
| ME4, Mcal/kg of DM | 2.83 | 2.81 |
1
BS = total mixed ration with 10% of barley straw; AH = total mixed ration with 19% of alfalfa hay.
2
Nutral Terneros (NUTRAL, S.A., Colmenar Viejo, Madrid, Spain): vitamin and mineral premix contained per kilogram premix (as fed): 1,500 kIU vitamin A, 500 kIU vitamin D3, 3.75 g vitamin E, 0.5 g vitamin B1, 0.5 g vitamin B2, 0.25 g vitamin B6, 1.25 mg vitamin B12, 15.0 g Zn, 2.5 g Fe, 83.3 g S, 55.0 mg Co, 2.5 g Cu, 7.5 g Mn, 100.0 mg I, 100.0 mg Se.
3
NFC = nonfiber carbohydrates calculated as 100 – (CP + ash + NDF + EE).
4
According to NRC (2000).