Table 1.
Diet composition for phases 1 to 4 diets (as-fed basis)1
| Item | Phase 1 | Phase 2 | Phase 3 | Phase 4 |
|---|---|---|---|---|
| Ingredient, % | ||||
| Corn | 66.71–65.25 | 77.45–76.17 | 84.24–83.09 | 84.91–83.93 |
| Soybean meal, 46.5% CP | 30.78–30.88 | 20.15–20.24 | 13.58–13.66 | 13.13–13.20 |
| Limestone | 0.95–1.18 | 0.90–1.10 | 0.85–1.03 | 0.83–0.98 |
| Monocalcium phosphate, 21% P | 0.45–1.59 | 0.43–1.42 | 0.38–1.27 | 0.26–1.03 |
| Sodium chloride | 0.35 | 0.35 | 0.35 | 0.35 |
| L-lysine HCl | 0.35 | 0.35 | 0.30 | 0.25 |
| DL-methionine | 0.12 | 0.07 | 0.02 | 0.01 |
| L-threonine | 0.11 | 0.12 | 0.10 | 0.08 |
| L-tryptophan | 0.01 | 0.02 | 0.02 | 0.01 |
| Vitamin premix2 | 0.08 | 0.08 | 0.08 | 0.08 |
| Trace mineral premix3 | 0.10 | 0.10 | 0.10 | 0.10 |
| Total | 100.00 | 100.00 | 100.00 | 100.00 |
| Calculated analysis | ||||
| Standardized ileal digestible amino acids, % | ||||
| Lysine | 1.21 | 0.95 | 0.75 | 0.70 |
| Isoleucine:lysine | 61 | 59 | 60 | 64 |
| Leucine:lysine | 127 | 136 | 151 | 161 |
| Methionine:lysine | 33 | 32 | 30 | 31 |
| Methionine and cysteine:lysine | 56 | 57 | 58 | 60 |
| Threonine:lysine | 61 | 63 | 65 | 67 |
| Tryptophan:lysine | 18.7 | 18.2 | 18.2 | 18.5 |
| Valine:lysine | 66 | 67 | 70 | 74 |
| Total lysine, % | 1.35 | 1.07 | 0.85 | 0.80 |
| Net energy, kcal/kg | 2,445–2,407 | 2,509–2,476 | 2,549–2,520 | 2,555–2,529 |
| Crude protein, % | 20.7 | 16.5 | 13.8 | 13.6 |
| Calcium, % | 0.56–0.84 | 0.50–0.75 | 0.45–0.67 | 0.42–0.61 |
| Phosphorus, % | 0.49–0.73 | 0.44–0.65 | 0.40–0.59 | 0.37–0.53 |
| STTD P, %4 | 0.25–0.46 | 0.22–0.40 | 0.19–0.36 | 0.17–0.31 |
| Available phosphorus, % | 0.17–0.42 | 0.15–0.37 | 0.13–0.32 | 0.11–0.27 |
| Calcium:phosphorus | 1.15 | 1.15 | 1.14 | 1.15 |
1Treatment were formulated to contain 80%, 90%, 100%, 115%, 130%, and 150% of NRC (2012) STTD P estimates across dietary phases (0.31%, 0.31%, 0.24%, 0.21% for phases 1, 2, 3, and 4, respectively). Phase 1 diets were fed from day 0 to 29 (24.1 to 49.1 kg), phase 2 from day 29 to 56 (49.1 to 75.5 kg), phase 3 from day 56 to 70 (75.5 to 89.7 kg), and phase 4 from day 70 to 111 (89.7 to 130.4 kg).
2Provided per kg of premix: 8,818,490 IU vitamin A; 1,102,311 IU vitamin D; 35,273 IU vitamin E; 3,527.4 mg vitamin K; 30.9 mg vitamin B12; 39,683 mg niacin; 22,046 mg pantothenic acid; and 6,614 mg riboflavin.
3Provided per kg of premix: 165 g Zn from Zn sulfate; 165 g Fe from iron sulfate; 40 g Mn from manganese oxide; 17 g Cu from copper sulfate; 0.3 g I from calcium iodate; and 0.3 g Se from sodium selenite.
4Standardized total tract digestible phosphorus.