Table 1.
Composition and nutrient level of the experimental diets (as dry-matter basis).1
| Item | Control | SPC19 | FM19 | SPC23 | FM23 |
|---|---|---|---|---|---|
| Ingredients, % | |||||
| Corn | 62.09 | 59.67 | 60.22 | 53.33 | 53.71 |
| Extruded soybean meal | 17.50 | 17.50 | 17.50 | 17.50 | 17.50 |
| Fish meal | 3.00 | 3.00 | 7.37 | 3.00 | 16.20 |
| Soy protein concentrate | 4.36 | 13.41 | |||
| Whey powder | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 |
| Soybean oil | 2.85 | 1.75 | 2.00 | 1.35 | |
| L-Lys·HCl | 0.70 | 0.48 | 0.41 | 0.04 | |
| DL-Met | 0.22 | 0.15 | 0.12 | ||
| L-Thr | 0.23 | 0.13 | 0.11 | ||
| L-Trp | 0.06 | 0.02 | 0.03 | ||
| L-Ile | 0.16 | 0.03 | 0.04 | ||
| L-Val | 0.20 | 0.08 | 0.06 | ||
| L-His | 0.03 | ||||
| L-Phe | 0.05 | ||||
| Premix2 | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 |
| Dicalcium phosphate | 0.79 | 0.73 | 0.06 | 0.61 | |
| Limestone | 0.96 | 0.94 | 0.92 | 0.90 | 0.08 |
| Acidifier | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 |
| TiO2 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 |
| NaCl | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| NaHCO3 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| Total | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 |
| Calculated nutrient levels, % | |||||
| Crude protein (analyzed) | 17.00 | 19.00 | 19.00 | 23.70 | 23.70 |
| DE, MJ/kg | 3.40 | 3.40 | 3.40 | 3.40 | 3.40 |
| Ca | 0.80 | 0.80 | 0.80 | 0.80 | 0.80 |
| Available P | 0.40 | 0.40 | 0.40 | 0.40 | 0.63 |
| Lys | 1.36 | 1.35 | 1.35 | 1.36 | 1.48 |
| Met + Cys | 0.77 | 0.77 | 0.76 | 0.76 | 0.82 |
| Thr | 0.86 | 0.87 | 0.86 | 0.95 | 0.99 |
| Trp | 0.25 | 0.24 | 0.25 | 0.30 | 0.28 |
| Arg | 0.94 | 1.08 | 1.10 | 1.37 | 1.42 |
| Val | 0.92 | 0.93 | 0.92 | 1.09 | 1.12 |
| Leu | 1.40 | 1.59 | 1.60 | 1.98 | 1.98 |
| Ile | 0.74 | 0.73 | 0.73 | 0.95 | 0.91 |
| His | 0.43 | 0.47 | 0.47 | 0.61 | 0.61 |
| Phe | 0.81 | 0.89 | 0.87 | 1.15 | 1.08 |
SPC = soy protein concentrate; FM = fish meal.
Control = control diet of 17% CP; SPC19 = 19% CP diets formulated with more soy protein concentrate; FM19 = 19% CP diets formulated with more fish meal; SPC23 = 23.7% CP diets formulated with more soy protein concentrate; FM23 = 23.7% CP diets formulated with more fish meal.
Provided per kilogram of diet: vitamin A, 11,000 IU; vitamin D3, 1,100 IU; vitamin E, 250 IU; vitamin K, 2.5 mg; vitamin B12, 87.5 µg; vitamin B1, 5 mg; vitamin B2, 16.5 mg; nicotinamide, 75 mg; pantothenate, 50 mg; folic acid, 1.5 mg; vitamin B6, 50 mg; biotin, 250 µg; choline chloride, 2.5 mg; Fe (C4H2FeO4), 100 mg; Cu (CuSO4·5H2O), 6 mg; Mn (MnSO4·H2O), 4 mg; Zn (ZnSO4·H2O), 100 mg; I [Ca(IO3)2], 0.14 mg; Se (Na2SeO3), 0.30 mg; Co (CoSO4·7H2O), 6 mg.