Table 1.
Ingredients and nutrient levels of the experimental diets for Shaziling pigs (<15 kg and 15~30 kg) (air-dried, %).
| Dietary Protein Levels | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Item | <15 kg | 15–30 kg | ||||||||
| +20% | +10% | 0 | −10% | −20% | +20% | +10% | 0 | −10% | −20% | |
| Ingredients, % | ||||||||||
| Corn | 50.38 | 53.12 | 59.12 | 62.48 | 68.3 | 48.52 | 53.63 | 58.7 | 64.6 | 68.5 |
| Soybean meal | 26.95 | 27.31 | 22.21 | 20.5 | 15.5 | 29.31 | 24.2 | 18 | 12.3 | 6 |
| Corn gluten meal | 9 | 5 | 3.74 | 1.5 | 0 | 0 | 0 | 0.2 | 0.1 | 0.15 |
| Wheat bran | 9 | 9 | 9 | 9 | 9 | 18 | 18 | 19.1 | 18.8 | 20.9 |
| Soybean oil | 0.7 | 1.4 | 1.4 | 1.8 | 2.2 | 0 | 0 | 0 | 0 | 0 |
| Lys | 0.35 | 0.33 | 0.55 | 0.65 | 0.75 | 0.33 | 0.33 | 0.43 | 0.55 | 0.7 |
| Met | 0.18 | 0.3 | 0.3 | 0.32 | 0.35 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Thr | 0.1 | 0.2 | 0.26 | 0.3 | 0.4 | 0.2 | 0.2 | 0.3 | 0.3 | 0.4 |
| Trp | 0.02 | 0.02 | 0.05 | 0.08 | 0.08 | 0.02 | 0.02 | 0.05 | 0.15 | 0.15 |
| CaHPO4 | 1 | 1 | 1.05 | 1.05 | 1.1 | 1 | 1 | 0.8 | 0.8 | 0.8 |
| CaCO3 | 1.02 | 1.02 | 1.02 | 1.02 | 1.02 | 1.02 | 1.02 | 0.82 | 0.8 | 0.8 |
| Salt | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Premix a | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Nutrient levels b | ||||||||||
| Digestible energy, MJ/kg | 13.5 | 13.54 | 13.48 | 13.49 | 13.5 | 12.78 | 12.78 | 12.76 | 12.74 | 12.6 |
| Crude protein, % | 21.6 | 19.94 | 18 | 16.54 | 14.41 | 19.24 | 17.62 | 16.11 | 14.43 | 12.92 |
| Calcium, % | 0.72 | 0.72 | 0.71 | 0.71 | 0.7 | 0.73 | 0.72 | 0.58 | 0.55 | 0.53 |
| Total phosphorus, % | 0.59 | 0.58 | 0.57 | 0.56 | 0.55 | 0.65 | 0.63 | 0.58 | 0.56 | 0.55 |
| Available phosphorus, % | 0.27 | 0.26 | 0.27 | 0.26 | 0.26 | 0.29 | 0.28 | 0.25 | 0.24 | 0.24 |
a Premix provided for 1 kg of the diet: Cu, 128 mg; Mn, 97.6 mg; Zn 109 mg; Fe, 197.6 mg; Se, 1 mg; I, 1 mg; Co, 1 mg; VA, 32,500 IU; VD3, 10,000 IU; VE, 80 IU; VK3, 10 mg; VB1, 10 mg/kg; VB2, 25 mg; VB6, 8 mg; VB12, 0.075 mg; biotin, 0.075 mg; folic acid, 5 mg; nicotinamide, 100 mg; pantothenic acid, 50 mg; choline, 1600 mg; mildewcide, 0.10%; ethoxyquinoline (33%), 0.05%; acidifier, 0.25%. b Crude protein was measured, and others were calculated.