Table 1.
Ingredients and nutrient compositions of the experimental diets (%, as-fed basis).
| Item | HP | LP |
|---|---|---|
| Ingredient, % | ||
| Corn | 58.60 | 71.70 |
| Soybean meal | 36.50 | 15.40 |
| Wheat bran | 1.50 | 8.90 |
| Soybean oil | 0.80 | - |
| Limestone | 0.86 | 0.92 |
| Dicalcium phosphate | 0.90 | 1.05 |
| Salt | 0.30 | 0.30 |
| L-Lysine·HCl | 0.03 | 0.59 |
| L-Threonine | 0.01 | 0.24 |
| DL-Methionine | - | 0.17 |
| L-Tryptophan | - | 0.09 |
| L-Valine | - | 0.14 |
| Premix 1 | 0.50 | 0.50 |
| Analyzed nutrient level | ||
| Dry matter, % | 90.20 | 88.97 |
| Gross energy, MJ/kg | 16.85 | 16.27 |
| Crude protein, % | 20.54 | 15.29 |
| Ether extract, % | 2.99 | 2.69 |
| Ash, % | 5.11 | 4.53 |
| Acid detergent fiber, % | 3.89 | 3.96 |
| Neutral detergent fiber, % | 11.35 | 12.03 |
| Calculated nutrient level | ||
| Net energy, MJ/kg | 10.04 | 10.04 |
| SID Lysine, % | 1.00 | 1.00 |
| SID Methionine + cysteine, % | 0.59 | 0.59 |
| SID Threonine, % | 0.63 | 0.63 |
| SID Tryptophan, % | 0.21 | 0.21 |
| SID Valine, % | 0.79 | 0.66 |
1 Premix provided the following per kg of complete diet for growing pigs: vitamin A, 5512 IU; vitamin D3, 2200 IU; vitamin E, 64 IU; vitamin K3, 2.2 mg; vitamin B12, 27.6 μg; riboflavin, 5.5 mg; pantothenic acid, 13.8 mg; niacin, 30.3 mg; choline chloride, 551 mg; Mn, 40 mg (MnSO4); Fe, 100 mg (FeSO4∙H2O); Zn, 100 mg (ZnSO4); Cu, 100 mg (CuSO4∙5H2O); I, 0.3 mg (KI); Se, 0.3 mg (Na2SeO3). Abbreviations: HP, high-protein diet treatment; LP, low-protein diet treatment.