Table 1.
Ingredient composition and nutrient content of experimental diets (as-fed)
| CON1 | LCP | |
|---|---|---|
| Ingredient | ||
| Corn | 68.07 | 73.72 |
| Soybean meal, dehulled, 48% CP | 24.40 | 10.52 |
| Fat, A/V blend | 3.55 | 3.64 |
| Soy hulls | 0 | 6.22 |
| l-Lys·HCl | 0 | 0.42 |
| l-Val | 0.17 | 0.40 |
| l-Phe | 0 | 0.31 |
| l-Thr | 0.08 | 0.27 |
| l-Ile | 0 | 0.17 |
| dl-Met | 0.04 | 0.17 |
| l-Leu | 0 | 0.14 |
| l-His | 0 | 0.12 |
| l-Trp | 0.01 | 0.09 |
| Sodium chloride | 0.50 | 0.50 |
| Limestone, ground | 1.23 | 1.16 |
| Monocalcium phosphate | 1.25 | 1.45 |
| Vitamin and mineral premix2 | 0.60 | 0.60 |
| Titanium dioxide | 0.10 | 0.10 |
| Total | 100.00 | 100.00 |
| Calculated nutrient content3 | ||
| NE, kcal/kg | 2,600 | 2,600 |
| CP, % | 17.48 | 13.37 |
| SID Lys, %4 | 0.77 | 0.77 |
| SID Ile, % | 0.62 | 0.55 |
| SID Met,% | 0.29 | 0.35 |
| SID Met + Cys, % | 0.53 | 0.53 |
| SID Thr, % | 0.61 | 0.61 |
| SID Trp, % | 0.19 | 0.19 |
| SID Val, % | 0.85 | 0.85 |
| SID Arg, % | 1.01 | 0.61 |
| SID His, % | 0.42 | 0.40 |
| SID Leu, % | 1.35 | 1.12 |
| SID Phe, % | 0.74 | 0.79 |
| SID Phe + Tyr, % | 1.22 | 1.11 |
| STTD P, %5 | 0.42 | 0.42 |
| Total Ca, % | 0.83 | 0.83 |
| Fermentable fiber, % | 10.00 | 10.00 |
| Analyzed nutrient content, % | ||
| DM | 89.76 | 89.69 |
| CP | 16.24 | 12.68 |
| Lys | 0.89 (0.89)6 | 0.82 (0.87) |
| Ile | 0.76 (0.71) | 0.61 (0.62) |
| Met | 0.30 (0.32) | 0.33 (0.38) |
| Met + Cys | 0.60 (0.62) | 0.54 (0.61) |
| Thr | 0.74 (0.72) | 0.68 (0.69) |
| Trp | — (0.21) | — (0.21) |
| Val | 0.98 (0.97) | 0.92 (0.94) |
| Arg | 1.20 (1.09) | 0.71 (0.67) |
| His | 0.48 (0.48) | 0.42 (0.45) |
| Leu | 1.63 (1.54) | 1.26 (1.28) |
| Phe | 0.93 (0.85) | 0.86 (0.88) |
| Phe + Tyr | — (1.42) | — (1.27) |
1CON = control, 16.2% CP (as-fed; analyzed contents); LCP = low crude protein, 12.7% CP.
2Provided the following amounts of vitamins per kilogram of diet: vitamin A, 3,000 IU; vitamin D3, 300 IU; vitamin E, 20 IU; menadione (vitamin K), 1 mg; vitamin B12, 20 µg; riboflavin, 4 mg; D-pantothenic acid, 10 mg; niacin, 15 mg and provided the following amounts of trace minerals per kilogram of diet: Fe, 640 mg as FeCO3; Zn, 260 mg as ZnO; Mn, 36 mg as MnO2; Cu, 20 mg as CuCl2; I, 0.58 mg as ethylenediamine dihydroiodide.
3Based on nutrient concentrations in feed ingredients according to the NRC (2012).
4SID = standardized ileal digestible (NRC, 2012).
5STTD = standardized total tract digestible.
6Calculated amino acid concentrations are shown in parentheses.