Table 1.
Composition of the experimental basal diets fed to broiler chickens.
| Ingredients (g/kg, as Fed Basis) | Days | ||
|---|---|---|---|
| 1–14 d | 15–28 d | 29–42 d | |
| Corn | 518.3 | 585.9 | 615.5 |
| Soybean meal (44% crude protein) | 426.8 | 356.5 | 318.6 |
| Soybean oil | 16.0 | 22.0 | 31.7 |
| Limestone | 12.7 | 12.4 | 11.8 |
| Dicalcium phosphate | 15.5 | 13.0 | 12.5 |
| Salt | 2.5 | 2.5 | 2.5 |
| Mineral-vitamin premix * | 5.0 | 5.0 | 5.0 |
| dl-methionine | 2.5 | 2.2 | 2.0 |
| l-lysine | 0.7 | 0.5 | 0.4 |
| Calculated composition | |||
| Metabolizable energy (kcal/kg) | 2900 | 2950 | 3000 |
| Crude protein (%) | 22.75 | 21.00 | 19.00 |
| Crude fat (%) | 2.42 | 4.64 | 2.86 |
| Crude fiber | 2.95 | 3.01 | 3.26 |
| Ash | 4.35 | 4.29 | 4.02 |
| Linoleic acid (%) | 2.81 | 2.13 | 1.46 |
| Calcium (%) | 0.94 | 0.87 | 0.78 |
| Available phosphorus (%) | 0.42 | 0.38 | 0.35 |
| Sodium (%) | 0.19 | 0.17 | 0.15 |
| Methionine (%) | 0.61 | 0.58 | 0.53 |
| Methionine + cysteine (%) | 0.96 | 0.94 | 0.81 |
| Total lysine | 1.30 | 1.10 | 1.10 |
* Supplied per kg diet: Calcium pantothenate: 4 mg/g; Niacin: 15 mg/g; Vitamin B6: 13 mg/g; Cu: 3 mg/g; Zn: 15 mg/g; Mn: 20 mg/g; Fe: 10 mg/g; K: 0.3 mg/g; Vitamin A: 5000 IU/g; Vitamin D3: 500 IU/g; Vitamin E: 3 mg/g; Vitamin K3: 1.5 mg/g; Vitamin B2: 1 mg/g.