Table 3.
Composition of diets for phase 1 and 2, Exp. 2 (as-fed basis)1,2
| Phase 1 SID Lys,3 % | Phase 2 SID Lys, % | |||
|---|---|---|---|---|
| Item | 92.5 | 100.0 | 92.5 | 100.0 |
| Ingredient, % | ||||
| Corn | 56.06 | 52.94 | 59.94 | 57.20 |
| Soybean meal, 46.5% CP | 11.23 | 14.33 | 7.56 | 10.29 |
| Distillers dried grains with solubles | 30.00 | 30.00 | 30.00 | 30.00 |
| Limestone | 1.60 | 1.60 | 1.45 | 1.45 |
| Salt | 0.35 | 0.35 | 0.35 | 0.35 |
| Vitamin premix4 | 0.08 | 0.08 | 0.08 | 0.08 |
| Trace mineral premix5 | 0.10 | 0.10 | 0.10 | 0.10 |
| L-Lys HCl | 0.475 | 0.475 | 0.450 | 0.450 |
| DL-Meth | 0.005 | 0.025 | — | — |
| L-Thr | 0.050 | 0.050 | 0.030 | 0.035 |
| L-Trp | 0.043 | 0.040 | 0.041 | 0.039 |
| Phytase6 | 0.005 | 0.005 | 0.005 | 0.005 |
| TBCC7 | ± | ± | ± | ± |
| Total | 100.0 | 100.0 | 100.0 | 100.0 |
| Calculated analysis | ||||
| Standard ileal digestible (SID) amino acids, % | ||||
| Lys | 0.95 | 1.03 | 0.84 | 0.91 |
| Ile:Lys | 62 | 62 | 63 | 63 |
| Meth:Lys | 31 | 32 | 32 | 31 |
| Met + Cys:Lys | 58 | 58 | 61 | 59 |
| Thr:Lys | 62 | 62 | 62 | 62 |
| Trp:Lys | 19 | 19 | 19 | 19 |
| Val:Lys | 71 | 70 | 73 | 73 |
| Total lysine, % | 1.14 | 1.22 | 1.02 | 1.09 |
| SID lysine:ME, g/Mcal | 2.87 | 3.11 | 2.53 | 2.74 |
| ME, kcal/kg | 3,318 | 3,314 | 3,327 | 3,322 |
| NE, kcal/kg | 2,456 | 2,436 | 2,480 | 2,465 |
| CP, % | 19.3 | 20.5 | 17.7 | 18.8 |
| Ca, % | 0.65 | 0.66 | 0.58 | 0.59 |
| P, % | 0.42 | 0.42 | 0.39 | 0.40 |
| Available P, % | 0.28 | 0.28 | 0.26 | 0.27 |
1Phase 1 diets fed from day 0 to 21 and phase 2 diets fed from day 21 to 38.
2Each diet was fed in meal form.
3Standardized ileal digestible; SID Lys values (NRC, 2012) are expressed as the percentage of estimated SID Lys requirement for these pigs in this environment and production phase.
4Provided per kilogram of premix: 7,054,720 IU vitamin A; 1,102,300 IU vitamin D3; 35,274 IU vitamin E; 3,527 mg vitamin K; 6,173 mg riboflavin; 22,046 mg pantothenic acid; 39,683 mg niacin; and 26 mg vitamin B12.
5Provided per kilogram of premix: 17 g Mn from manganese oxide, 110 g Fe from ferrous sulfate, 110 g Zn from zinc oxide, 17 g Cu from copper sulfate, 331 mg I from ethylenediamine dihydroiodide, and 300 mg Se from sodium selenite.
6Optiphos 2000 (Huvepharma, Inc., Peachtree City, GA) provided 200 phytase units (FTU)/kg, with a release of 0.05% available P.
7Tribasic copper chloride (Intellibond C; Micronutrients, Inc.) provided 150 mg/kg Cu and was added at the expense of corn.