Table 1.
Diet composition, as fed basis
| Item | Phase 1 | Phase 2 |
|---|---|---|
| Days of study fed | 0 to 14 | 14 to 35 |
| Ingredient (%) | ||
| Corna | 56.27 | 64.63 |
| Soybean meal | 25.00 | 30.75 |
| Fat, choice white grease | 2.00 | 1.50 |
| Dical | 0.75 | 1.20 |
| Limestone | 0.45 | 0.60 |
| Salt | 0.30 | 0.50 |
| l-Lysine | 0.35 | 0.36 |
| Methionine hydroxy analogue | 0.22 | 0.16 |
| l-threonine | 0.16 | 0.10 |
| Plasma | 2.00 | — |
| Lactoseb | 7.50 | — |
| Fish meal | 4.50 | — |
| Zinc oxide | 0.30 | — |
| Copper sulfate | 0.05 | 0.05 |
| Vitamin premixc | 0.05 | 0.05 |
| Trace mineral premixd | 0.10 | 0.10 |
| Total | 100 | 100 |
| Calculated composition | ||
| ME (Mcal/kg) | 3.47 | 3.40 |
| CP (%) | 21.83 | 20.46 |
| Total Lys (%) | 1.54 | 1.38 |
| SID Lys (%) | 1.40 | 1.25 |
| Available P (%) | 0.51 | 0.41 |
| Ca (%) | 0.73 | 0.62 |
| SID Met + Cys:Lys | 58.61 | 58.06 |
| SID Thr:Lys | 62.46 | 60.13 |
| SID Trp:Lys | 16.06 | 17.04 |
| SID Ile:Lys | 55.86 | 60.05 |
| SID Val:Lys | 65.25 | 66.87 |
SID = Standardized ileal digestible.
aRespective antibiotics were added to diets at the expense of corn.
bTrade name: DairyLac 80 (International Ingredient Corporation, St. Louis, MO).
cProvided per kg of final diet: 6,600 IU vitamin A, 704 IU vitamin D3, 26 IU vitamin E, 4.9 mg riboflavin, 2.6 mg menadione, 0.02 mg vitamin B12, 16.5 mg d-pantothenic acid, and 29.7 mg niacin.
dProvided per kg of final diet: 66 mg iron, 66 mg zinc, 19.8 mg manganese, 66 mg copper, 14 mg iodine, and 0.12 mg selenium.