Table 1.
Composition of experimental diets (as fed basis)
| Ingredient (%) | Xylose level | |||
|---|---|---|---|---|
| 0% | 5% | 15% | 25% | |
| Corn | 40.0 | 40.0 | 40.0 | 40.0 |
| Xylose | — | 5.0 | 15.0 | 25.0 |
| Cornstarch | 25.0 | 20.0 | 10.0 | — |
| Soybean meal, 44% CP | 31.0 | 31.0 | 31.0 | 31.0 |
| Vegetable oil | 0.80 | 0.80 | 0.80 | 0.80 |
| Limestone | 0.90 | 0.90 | 0.90 | 0.90 |
| Mono calcium phosphate | 0.80 | 0.80 | 0.80 | 0.80 |
| Iodized salt | 0.50 | 0.50 | 0.50 | 0.50 |
| Vitamin-mineral premix1 | 1.00 | 1.00 | 1.00 | 1.00 |
| Calculated nutrient content2 | ||||
| DM, % | 91.0 | 91.0 | 91.0 | 91.0 |
| DE, kcal/kg | 3,564 | 3,551 | 3,526 | 3,500 |
| CP, % | 17.0 | 17.0 | 17.0 | 17.0 |
| SID3 | ||||
| Lys, % | 0.86 | 0.86 | 0.86 | 0.86 |
| Met, % | 0.23 | 0.23 | 0.23 | 0.23 |
| Thr, % | 0.55 | 0.55 | 0.55 | 0.55 |
| Trp, % | 0.18 | 0.18 | 0.18 | 0.18 |
| Analyzed chemical composition | ||||
| DM, % | 89.0 | 89.8 | 90.8 | 91.2 |
| GE, kcal/kg | 3,872 | 3,853 | 3,851 | 3,859 |
| CP , % | 16.3 | 16.6 | 17.4 | 16.6 |
1Premix supplied per kilogram of diet: vitamin A, 8,250 IU; vitamin D3, 825 IU; vitamin E, 40 IU; vitamin K, 4 mg; thiamine, 1 mg; riboflavin, 5 mg; niacin, 35 mg; pantothenic acid, 15 mg; vitamin B12, 25 µg; biotin, 200 µg; folic acid, 2 mg; Cu, 15 mg (copper sulfate); I, 0.21 mg as Ca(IO3)2; Fe, 100 mg (ferrous sulfate); Mn, 20 mg (manganese oxide); Se, 0.15 mg (sodium selenite); and Zn, 100 mg (zinc oxide).
2Nutritional composition was calculated based on ingredient composition values from NRC (1998). Digestible energy value of 3,743 kcal/kg was used for D-xylose assuming similar GE and digestibility as glucose (Verstegen et al., 1997).
3SID, standardized ileal digestible.