Table 3.
Composition of experimental diets (as-fed basis).
| Ingredients, % | CON1 | 18% CP1 | 12% CP1 |
|---|---|---|---|
| Corn, yellow dent | 52.60 | 64.63 | 76.09 |
| Fish meal, menhaden | 5.00 | 5.00 | 5.00 |
| Soybean meal, 47.5% CP | 34.50 | 18.52 | 3.94 |
| Whey, dried | 6.00 | 6.00 | 6.00 |
| Corn starch | — | 3.65 | 6.29 |
| Dicalcium phosphate 18.5% | 0.65 | 1.06 | 1.44 |
| Limestone | 0.59 | 0.50 | 0.55 |
| Salt | 0.26 | 0.25 | 0.27 |
| Vitamin premix2 | 0.25 | 0.25 | 0.25 |
| Trace mineral premix3 | 0.15 | 0.15 | 0.15 |
| Chemical Composition | |||
| Crude protein, % | |||
| Calculated4 | 24.00 | 18.00 | 12.00 |
| Analyzed | 23.00 | 19.00 | 12.00 |
| SID Lysine, %4 | 1.32 | 0.91 | 0.54 |
| SID Threonine, %4 | 0.83 | 0.60 | 0.40 |
| SID Methionine, %4 | 0.38 | 0.30 | 0.23 |
| SID Tryptophan, %4 | 0.27 | 0.18 | 0.1 |
| Crude Fat, % | |||
| Calculated4 | 3.61 | 3.60 | 3.61 |
| Analyzed | 3.10 | 2.70 | 3.20 |
| Carbohydrate, % | 70.49 | 76.19 | 81.73 |
| ME, Mcal/kg5 | |||
| Calculated4 | 1.5 | 1.5 | 1.5 |
1CON, control diet with 24% crude protein (CP); 18% CP, low protein diet with 18% CP; 12% CP, low protein diet with 12% CP.
2Vitamin mix provided per kilogram of diet: vitamin A, 720,000 IU; vitamin D, 180,000 IU; vitamin E, 5,400 mg; vitamin K3, 360 mg; vitamin B12, 3.15 mg; niacin, 6,750 mg; pantothenic acid, 2,250 mg; riboflavin, 675 mg; phytase, 61,200 FTU.
3Mineral mix provided per kilogram of diet: copper sulfate, 11,000 ppm; iodine, 198 ppm; iron, 73,413 ppm; manganese, 22,046; selenium, 198 ppm; zinc, 73,413 ppm.
4Values were calculated using National Swine Nutrition Guide (NSNG; V 2.0) software; standard ileal digestibility (SID).
5Metabolizable energy (ME).