Table 1.
Composition of experimental diets (as-fed basis)
| Item | Phase1 | ||
|---|---|---|---|
| 1 | 2 | 3 | |
| Ingredient, % | |||
| Corn | 78.45 | 82.85 | 85.25 |
| Soybean meal, 46.5% CP | 19.20 | 14.95 | 12.70 |
| Monocalcium P, 21% P | 0.33 | 0.30 | 0.30 |
| Limestone | 1.10 | 1.08 | 1.00 |
| Salt | 0.35 | 0.35 | 0.35 |
| L-Lys HCl | 0.25 | 0.22 | 0.20 |
| DL- Met | 0.02 | – | – |
| L-Thr | 0.05 | 0.05 | 0.05 |
| Vitamin and trace mineral premix2 | 0.26 | 0.20 | 0.15 |
| Phytase3 | 0.015 | 0.015 | 0.015 |
| Total | 100.0 | 100.0 | 100.0 |
| Calculated analysis | |||
| SID4 amino acids, % | |||
| Lys | 0.85 | 0.72 | 0.65 |
| Ile:lys | 64 | 66 | 67 |
| Leu:lys | 149 | 162 | 172 |
| Met:lys | 29 | 30 | 31 |
| Thr:lys | 61 | 64 | 67 |
| Trp:lys | 18 | 18 | 18 |
| Val:lys | 73 | 76 | 79 |
| SID lys NE, g/Mcal | 2.57 | 2.17 | 1.96 |
| ME, kcal/kg | 3,309 | 3,316 | 3,322 |
| NE, kcal/kg | 2,474 | 2,502 | 2,520 |
| Total lys, % | 0.96 | 0.82 | 0.75 |
| Available P, % | 0.27 | 0.26 | 0.26 |
| Analyzed composition,5 % | |||
| CP, % | 17.1 | 14.8 | 14.1 |
| Ca, % | 0.50 | 0.46 | 0.41 |
| P, % | 0.40 | 0.38 | 0.39 |
1
Phase 1, 2, and 3 diets were fed from d 0 to 28, d 28 to 56, and d 56 to slaughter, respectively.
2
Provided per kg of diet = 4,409,200 IU vitamin A, 551,150 IU vitamin D, 17,637 IU vitamin E, 1,764 mg vitamin K, 15 mg vitamin B12, 19,841 mg niacin, 11,023 mg pantothenic acid, 3307 mg riboflavin, 1,100 mg Zn, 1,100 mg Fe, 300 mg Mn, 110 mg Cu, 2 mg I, and 2 mg Se.
3
HiPhos (DSM Inc, Parsippany, NJ) provided phytase units 102,853 FYT/kg of product and released 0.10% available P.
4
SID = Standard ileal digestible.
5
Values represent the mean of 2 composite samples of each diet.