Table 1.
Composition and calculated nutrient levels of phase 1 (20 to 27 wk of age) diets.1
| Item | CON | Ile70 | Ile80 | Ile90 | Ile100 |
|---|---|---|---|---|---|
| Ingredient (g/kg) | |||||
| Corn | 485.1 | 476.9 | 476.9 | 476.9 | 476.9 |
| SBM 46% | 177.4 | 139.3 | 139.3 | 139.3 | 139.3 |
| Wheat | 100.0 | 150.0 | 150.0 | 150.0 | 150.0 |
| Limestone fine | 66.3 | 70.0 | 70.0 | 70.0 | 70.0 |
| Limestone course | 19.9 | 21.0 | 21.0 | 21.0 | 21.0 |
| Pork meal-58% | 60.0 | 42.0 | 42.0 | 42.0 | 42.0 |
| Corn DDGS | 40.0 | 40.0 | 40.0 | 40.0 | 40.0 |
| Corn starch | 15.00 | 15.00 | 14.20 | 13.37 | 12.57 |
| Soy oil | 11.9 | 10.8 | 10.8 | 10.8 | 10.8 |
| Vitamin and trace premix2 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 |
| Monocalcium phosphate | 5.1 | 11.3 | 11.3 | 11.3 | 11.3 |
| Sodium bicarbonate | 1.0 | 2.5 | 2.5 | 2.5 | 2.5 |
| Salt | 2.3 | 1.5 | 1.5 | 1.5 | 1.5 |
| DL-Methionine-99% | 2.13 | 2.57 | 2.57 | 2.57 | 2.57 |
| L-Lysine HCL | 0.73 | 2.30 | 2.30 | 2.30 | 2.30 |
| L-Threonine-98.5% | 0.27 | 0.97 | 0.97 | 0.97 | 0.97 |
| L-Valine-95% | 0.00 | 0.60 | 0.60 | 0.60 | 0.60 |
| L-Tryptophan-98.5% | 0.00 | 0.17 | 0.17 | 0.17 | 0.17 |
| L-Isoleucine-92% | 0.00 | 0.07 | 0.90 | 1.70 | 2.50 |
| Titanium dioxide | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 |
| Calculated provisions | |||||
| AMEn (kcal/kg) | 2,800 | 2,800 | 2,800 | 2,800 | 2,800 |
| Crude protein (%) | 18 | 16 | 16 | 16 | 16 |
| SID amino acids (%) | |||||
| Arg | 0.98 | 0.83 | 0.83 | 0.83 | 0.83 |
| Glu | 2.84 | 2.70 | 2.70 | 2.70 | 2.70 |
| His | 0.38 | 0.33 | 0.33 | 0.33 | 0.33 |
| Ile | 0.60 | 0.52 | 0.60 | 0.67 | 0.75 |
| Leu | 1.33 | 1.19 | 1.19 | 1.19 | 1.19 |
| Leu + Val | 1.76 | 1.67 | 1.67 | 1.67 | 1.67 |
| Lys | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 |
| Met | 0.46 | 0.48 | 0.48 | 0.48 | 0.48 |
| Met + Cys | 0.67 | 0.68 | 0.68 | 0.68 | 0.68 |
| Phe | 0.70 | 0.61 | 0.61 | 0.61 | 0.61 |
| Phe + Tyr | 1.14 | 1.01 | 1.01 | 1.01 | 1.01 |
| Thr | 0.52 | 0.52 | 0.52 | 0.52 | 0.52 |
| Trp | 0.17 | 0.16 | 0.16 | 0.16 | 0.16 |
| Val | 0.68 | 0.65 | 0.65 | 0.65 | 0.65 |
| Calcium (%) | 4.10 | 4.20 | 4.20 | 4.20 | 4.20 |
| Total phosphorus (%) | 0.69 | 0.72 | 0.72 | 0.72 | 0.72 |
Abbreviations: CON, control; SID, standardized ileal digestible.
CON: Control treatment formulated to provide Ile requirements through intact protein only. Ile70-100: Protein-restricted diets fortified with L-Ile to meet SID Ile:Lys ratios of 70, 80, 90, 100.
Vitamins and minerals provided per kilogram of premix: vitamin A, 1,200,000 IU; vitamin D3, 500,000 IU; vitamin E, 8,000 IU; vitamin B12, 1,700 mcg; biotin, 22,000 mcg; menadione, 330 mg; thiamin, 400 mg; riboflavin, 800 mg; pantothenic acid, 2,000 mg; pyridoxine, 430 mg; niacin 65,000 mg; folic acid, 220 mg; choline, 60,000 mg; iron, 6,000 mg; copper, 1,000 mg, manganese, 7,000 mg, zinc, 7,000 mg, iodine, 100 mg.