Table 5.
Effects of dietary protease supplementation on apparent ileal digestibility (%) of the protein and amino acids of soybean meal fed to growing-finishing pigs (50 to 65 kg/140 d old), phase II
| Item | Protease inclusion, g/ton | SEM | P-value | |||||
|---|---|---|---|---|---|---|---|---|
| 0 | 25 | 50 | 75 | Linear | Quadratic | CON vs. protease1 | ||
| CP | 76.1 | 78.7 | 80.2 | 75.3 | 2.48 | 0.96 | 0.39 | 0.67 |
| Indispensable AA | ||||||||
| Arg | 78.1 | 82.7 | 81.7 | 78.4 | 1.84 | 0.99 | 0.08 | 0.19 |
| His | 82.1 | 84.2 | 84.1 | 80.9 | 1.53 | 0.64 | 0.15 | 0.61 |
| Ile | 80.2 | 81.8 | 83.6 | 78.7 | 1.40 | 0.70 | 0.06 | 0.53 |
| Leu | 79.0 | 80.9 | 83.9 | 78.5 | 1.39 | 0.86 | 0.03 | 0.24 |
| Lys | 69.8 | 72.8 | 73.6 | 70.3 | 1.65 | 0.78 | 0.12 | 0.21 |
| Met | 82.4 | 84.7 | 86.2 | 81.0 | 1.56 | 0.75 | 0.05 | 0.44 |
| Met + Cys | 71.7 | 75.0 | 77.5 | 70.1 | 1.88 | 0.81 | 0.02 | 0.32 |
| Phe | 80.3 | 82.2 | 81.6 | 79.3 | 1.40 | 0.63 | 0.21 | 0.67 |
| Thr | 75.1 | 78.0 | 78.4 | 75.4 | 1.94 | 0.90 | 0.29 | 0.47 |
| Trp | 83.2 | 83.6 | 88.1 | 85.1 | 1.51 | 0.18 | 0.33 | 0.23 |
| Val | 73.9 | 75.9 | 78.1 | 71.0 | 1.63 | 0.47 | 0.03 | 0.60 |
| Mean | 77.6 | 79.9 | 81.1 | 77.1 | 1.44 | 0.80 | 0.04 | 0.35 |
| Dispensable AA | ||||||||
| Ala | 51.3 | 56.4 | 55.2 | 50.7 | 2.72 | 0.84 | 0.15 | 0.35 |
| Asp | 77.6 | 79.6 | 79.7 | 76.4 | 1.62 | 0.69 | 0.17 | 0.65 |
| Cys | 60.9 | 65.4 | 68.7 | 59.1 | 2.32 | 0.87 | 0.02 | 0.27 |
| Glu | 83.4 | 87.2 | 86.9 | 81.3 | 1.87 | 0.50 | 0.04 | 0.48 |
| Gly | 1.80 | 9.90 | 8.40 | 6.70 | 5.71 | 0.60 | 0.06 | 0.43 |
| Ser | 76.2 | 78.0 | 79.9 | 76.4 | 1.49 | 0.74 | 0.14 | 0.35 |
| Tyr | 75.8 | 81.2 | 81.5 | 76.8 | 1.43 | 0.67 | 0.01 | 0.04 |
| Mean | 64.1 | 68.7 | 69.3 | 62.9 | 2.15 | 0.96 | 0.08 | 0.31 |
| Total AA mean | 58.0 | 62.8 | 62.8 | 56.4 | 2.29 | 0.70 | 0.05 | 0.36 |
1Contrast: control diet (without protease supplementation) vs. protease supplementation (25 to 75 g/ton). Each dietary treatment had 10 observations.