Table 1.
The composition of experimental diet
| Ingredient, % | D1-30 | Ingredient, % | D31-72 | ||
|---|---|---|---|---|---|
| CON | PEC | CON | PEC | ||
| Corn | 40.41 | 40.41 | Corn | 58.32 | 58.32 |
| Extruded soybean | 6.00 | 6.00 | Soybean meal | 28.47 | 28.47 |
| Soybean meal | 19.80 | 19.80 | Soybean oil | 4.81 | 4.81 |
| Fish meal | 5.00 | 5.00 | Calcium phosphate | 1.37 | 1.37 |
| Whey powder | 14.80 | 14.80 | Limestone | 0.68 | 0.68 |
| Soybean oil | 1.15 | 1.15 | Sodium chloride | 0.30 | 0.30 |
| Calcium phosphate | 0.50 | 0.50 | L-lysine | 0.05 | 0.05 |
| Limestone | 1.03 | 1.03 | Premix1 | 1.00 | 1.00 |
| Sodium chloride | 0.5 | 0.5 | Cornstarch | 5.00 | – |
| DL-Methionine | 0.10 | 0.10 | Pectin | – | 5.00 |
| L-lysine | 0.40 | 0.40 | |||
| L-Threonine | 0.11 | 0.11 | |||
| Sucrose | 2.50 | 2.50 | |||
| Glucose | 2.50 | 2.50 | |||
| Premix1 | 0.20 | 0.20 | |||
| Cornstarch | 5.00 | – | |||
| Pectin | – | 5.00 | |||
1Vitamin and mineral premixes were obtained from Yinong Forage Ltd. and supplied per kg of diet as-fed: Mn (MnSO4.H2O), 25.0 mg; Zn (ZnSO4), 100.0 mg; Cu (CuSO4.5H2O), 50.0 mg; Se (Na2SeO3), 0.15 mg; Fe (FeSO4), 80.0 mg; I (KI), 0.5 mg; choline, 600.0 mg; vitamin A (all-trans retinyl acetate), 2.84 mg; vitamin D3, 0.22 mg; α-tocopherol, 40 mg; phylloquinone, 2.0 mg; thiamin, 1.0 mg; riboflavin, 5.0 mg; nicotinic acid, 15.0 mg; pantothenic acid, 15.0 mg; pyridoxine, 2.0 mg; vitamin B12, 0.025 mg; folic acid, 2 mg; and biotin, 0.2 mg.