Table 1. Composition of diets in the trial.
| Control |
||||
|---|---|---|---|---|
| Composition, g kg−1 | ||||
| Ingredients | 1–12d | 13–24d | 25–36d | 37–42d |
| Maize | 600 | 618 | 625 | 632 |
| Soybean meal, 47.0 | 335 | 310 | 297 | 290 |
| Soybean oil | 25 | 25 | 25 | 25 |
| Coconut fat | — | 15 | 25 | 25 |
| Limestone | 14 | 11 | 10 | 10 |
| Dicalcium phosphate | 11 | 9 | 7 | 7 |
| L-Lysine, hydrochloride | 3.5 | 3.0 | 2.5 | 2.5 |
| DL-Methionine | 2.5 | 1.5 | 1.5 | 1.5 |
| Sodium bicarbonate | 2.5 | 1 | 1 | 1 |
| Salt | 2.5 | 2.5 | 2.0 | 2.0 |
| Vitamin, mineral and enzyme premix1 | 4 | 4 | 4 | 4 |
| Proximate analysis | ||||
| Crude protein, % | 22.0 | 21.0 | 20.0 | 20.0 |
| Ether extract, % | 6.2 | 6.6 | 6.8 | 6.8 |
| Crude fiber, % | 3.5 | 3.6 | 3.6 | 3.6 |
| Ash, % | 4.7 | 4.6 | 4.6 | 4.6 |
| Lysine, %* | 1.3 | 1.2 | 1.1 | 1.1 |
| Methionine + Cystine, %* | 1.0 | 0.96 | 0.94 | 0.94 |
| Metabolisable energy, kcal /kg* | 3100 | 3180 | 3220 | 3220 |
1
Supplying per kg feed: 12,000 IU vitamin A, 5,000 IU vitamin D3, 30 mg vitamin E, 3 mg vitamin K, 5 mg thiamin, 6 mg riboflavin, 6 mg pyridoxine, 0. 02 mg vitamin B12, 60 mg niacin, 15 mg pantothenic acid, 1.5 mg folic acid, 0.25 biotin, 10 mg vitamin C, 500 mg choline chloride, 100 mg Zn, 120 mg Mn, 20 mg Fe, 15 mg Cu, 0.2 mg Co, 1 mg I, 0.3 mg Se, and phytase in recommended quantities per kg of diet.
*
Calculated values