Table 1. Composition of and nutrient levels in the basic diet.
| Item | 1∼21 days | 22∼42 days |
|---|---|---|
| Diet composition (%) | ||
| Corn | 56.49 | 61.42 |
| Soybean oil | 2.22 | 3.00 |
| Soybean meal | 30.24 | 25.30 |
| Cotton seed meal | 5.00 | 5.00 |
| Fishmeal | 2.43 | 1.98 |
| CaHCO3 | 1.60 | 1.39 |
| Limestone | 1.16 | 1.10 |
| Methionine | 0.15 | 0.05 |
| NaCl | 0.30 | 0.35 |
| Choline | 0.19 | 0.19 |
| Premixa | 0.22 | 0.22 |
| Nutrientb(%) | ||
| M (MJ kg−1) | 12.12 | 12.54 |
| Crude protein | 21.00 | 19.00 |
| Lysine | 1.12 | 0.98 |
| Methionine+ | 0.84 | 0.68 |
| Cystine | ||
| Calcium | 1.00 | 0.90 |
| Available phosphorus | 0.30 | 0.30 |
Notes.
a
The premix contained 0.2% trace elements and provided the following nutrients per kg feed: Fe 80 mg, Mn 80 mg, Zn 80 mg, I 0.35 mg, Se 0.15 mg. The premix contained 0.02% vitamins per kg feed: Vitamin D3 3000.00 IU, Vitamin E 30.00 IU, Vitamin K3 1.00 mg, Vitamin B1 2.00 mg, Vitamin B2 6.00 mg, Pantothenic acid 9.00 mg, Pyridoxine 5.00 mg, Niacin 30.00 mg, Vitamin B12 0.01 mg, Biotin 0.10 mg, Folic acid 0.30 mg.
b
Nutrition level is a calculated value.