Table 2.
Ingredients and nutrient compositions of experimental diets.
| Items | Starter 0 to 21 d | Grower 22 to 42 d |
|---|---|---|
| Ingredients, % | ||
| Corn | 58.40 | 63.09 |
| Soybean meal | 35.40 | 29.50 |
| Soy oil | 2.20 | 3.48 |
| Limestone | 1.62 | 1.98 |
| Calcium hydrogen phosphate | 1.28 | 0.90 |
| Sodium chloride | 0.23 | 0.23 |
| Choline chloride | 0.09 | 0.09 |
| DL-Methionine | 0.28 | 0.25 |
| Lysine | 0.10 | 0.08 |
| Premix1 | 0.40 | 0.40 |
| Chemical composition2 | ||
| Metabolizable energy, kcal/kg | 3,229 | 3,298 |
| Crude protein, % | 21.92 | 19.91 |
| Calcium, % | 1.12 | 0.93 |
| Available phosphorus, % | 0.48 | 0.35 |
| Lysine, % | 1.23 | 1.07 |
| Methionine, % | 0.49 | 0.38 |
1
Supplied per kilogram of diet: vitamin A, 8,050 IU; cholecalciferol, 3,000 IU; vitamin E, 30 mg; vitamin K3, 5 mg; thiamin, 2.58 mg; riboflavin, 12.5 mg; choline chloride, 800 mg; calcium pantothenate, 13 mg; niacin, 45 mg; biotin, 0.20 mg; folic acid, 1.20 mg; Mn, 100 mg; Fe, 80 mg; Zn, 58 mg; Cu, 8.8 mg; Se, 0.28 mg.
2
The chemical composition of the diets was determined according to AOAC (1990) methods except metabolizable energy and available phosphorus, which were calculated values. They were calculated according to “feed description and proximate composition” in Feeding standard of chicken (People's Republic of China, NY/T 33-2004).