Table 1.
Composition of the experimental diets fed during the pre-starter (d 1 to 15) and starter (d 16 to 36) phase
| Diets | ||
|---|---|---|
| Ingredient (g/kg air-dried diet) | Pre-starter | Starter |
| Corn | 316.0 | 206.0 |
| Wheat | 136.0 | 340.0 |
| Barley | 64.0 | 100.0 |
| Full-fat extruded soybeans | 204.0 | 90.0 |
| Soybean meal (44 % CP) | - | 148.0 |
| Soybean meal concentrate (56 % CP) | 120.0 | 25.0 |
| Lactose | 86.0 | 36.0 |
| Calcium carbonate | 10.8 | 8.2 |
| Monocalcium phosphate | 12.7 | 13.0 |
| Salt | 3.0 | 3.0 |
| DL-Methionine | 2.2 | 1.9 |
| L-Lysine-HCl | 5.0 | 5.7 |
| L-Threonine | 2.0 | 2.1 |
| L-Tryptophan | 0.3 | 0.3 |
| Soybean oil | 34.0 | 17.0 |
| Trace elements and vitamin premixa | 4.0 | 4.0 |
| Calculated analysis (% or as specified) | ||
| Crude protein (N × 6.25) | 19.4 | 18.5 |
| Digestible energy (MJ/kg) | 14.8 | 13.9 |
| Digestible amino acidsb | ||
| Lysine | 1.38 | 1.31 |
| Methionine | 0.51 | 0.46 |
| Methionine + cysteine | 0.84 | 0.77 |
| Threonine | 0.9 | 0.85 |
| Tryptophan | 0.26 | 0.23 |
aThe mineral and vitamin premix (TEGASA, Barcelona, Spain) provided the following per kg diet: vitamin A 10,000 UI; vitamin D3 2000 UI; vitamin E 25 mg; vitamin B1 1.5 mg; vitamin B2 3.5 mg; vitamin B6 2.4 mg; vitamin B12 20 μg; vitamin K3 1.5 mg; calcium panthotenate 14 mg; nicotinic acid 20 mg; folic acid 0.5 mg; biotin 50 μg; iron 120 mg; iodine 0.75 mg; cobalt 0.6 mg; copper 150 mg; manganese 60 mg; zinc 110 mg; selenium 0.37 mg
bIleal standardized digestibility