Table 1.
Nutrient composition of soybean meal, nonextruded soybean hulls, and extruded soybean hulls
| Soybean hulls | |||
|---|---|---|---|
| Item, % | Soybean meal | Nonextruded | Extruded |
| Dry matter | 89.0 | 93.1 | 91.9 |
| Gross energy, kcal/kg | 4,173 | 3,915 | 3,892 |
| Crude protein | 43.60 | 9.81 | 9.67 |
| Acid-hydrolyzed ether extract | 2.12 | 4.84 | 4.12 |
| Ash | 6.27 | 4.57 | 4.58 |
| Acid detergent fiber | 3.77 | 44.98 | 45.12 |
| Neutral detergent fiber | 6.89 | 60.02 | 58.37 |
| Total dietary fiber | 14.2 | 71.9 | 71.1 |
| Insoluble dietary fiber | 13.5 | 68.0 | 63.4 |
| Soluble dietary fiber | 0.7 | 3.9 | 7.7 |
| Indispensable amino acids | |||
| Arg | 3.38 | 0.47 | 0.46 |
| His | 1.20 | 0.26 | 0.26 |
| Ile | 2.23 | 0.42 | 0.42 |
| Leu | 3.55 | 0.69 | 0.69 |
| Lys | 2.98 | 0.74 | 0.70 |
| Met | 0.63 | 0.11 | 0.11 |
| Phe | 2.41 | 0.40 | 0.41 |
| Thr | 1.81 | 0.39 | 0.39 |
| Trp | 0.66 | 0.06 | 0.10 |
| Val | 2.29 | 0.47 | 0.47 |
| Dispensable amino acids | |||
| Ala | 2.00 | 0.43 | 0.43 |
| Asp | 5.10 | 0.97 | 0.98 |
| Cys | 0.63 | 0.20 | 0.20 |
| Glu | 8.37 | 1.09 | 1.11 |
| Gly | 1.96 | 0.84 | 0.86 |
| Pro | 2.44 | 0.56 | 0.57 |
| Ser | 2.14 | 0.56 | 0.58 |
| Tyr | 1.74 | 0.41 | 0.39 |
| Particle size, μm | 750 | 264 | 897 |