Table 3. Effect of energy level and dietary beet pulp on nutrient digestibility of growing-finishing pigs under heat stress conditions.
| Temperature (T) | TN | HS | SEM | p-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ME (kcal/kg) (E) | 3,300 | 3,300 | 3,450 | 3,300 | HS | ||||||||
| Fiber level (F) | Low | High | Low | High | Low | High | T | F | T × F | E | F | E × F | |
| Phase 1 (d 0–28) (%) | |||||||||||||
| DM | 86.62 | 86.19 | 82.88 | 82.47 | 82.64 | 82.98 | 0.61 | < 0.001 | 0.290 | 0.982 | 0.604 | 0.824 | 0.214 |
| GE | 90.07 | 91.26 | 86.69 | 87.10 | 86.07 | 87.49 | 0.73 | < 0.001 | 0.154 | 0.594 | 0.838 | 0.111 | 0.359 |
| CP | 88.56 | 88.53 | 83.72 | 84.49 | 83.62 | 84.40 | 0.97 | < 0.001 | 0.964 | 0.231 | 0.869 | 0.205 | 0.996 |
| CF | 56.39 | 54.52 | 49.89 | 51.90 | 49.31 | 50.01 | 1.89 | 0.005 | 0.957 | 0.170 | 0.383 | 0.340 | 0.638 |
| NDF | 54.73 | 54.69 | 48.76 | 50.20 | 47.19 | 49.24 | 1.82 | 0.001 | 0.591 | 0.572 | 0.352 | 0.207 | 0.821 |
| ADF | 48.48 | 47.25 | 40.14 | 42.28 | 39.49 | 40.55 | 1.52 | < 0.001 | 0.119 | 0.654 | 0.337 | 0.202 | 0.658 |
| Phase 2 (d 29–56) (%) | |||||||||||||
| DM | 86.00 | 85.52 | 82.91 | 83.47 | 82.64 | 82.98 | 0.64 | < 0.001 | 0.917 | 0.181 | 0.324 | 0.255 | 0.764 |
| GE | 90.45 | 90.79 | 85.32 | 86.18 | 84.97 | 85.53 | 0.80 | < 0.001 | 0.253 | 0.420 | 0.451 | 0.288 | 0.818 |
| CP | 88.4 | 88.45 | 83.02 | 83.63 | 83.25 | 84.11 | 1.12 | < 0.001 | 0.768 | 0.634 | 0.661 | 0.365 | 0.880 |
| CF | 55.76 | 55.61 | 52.50 | 51.29 | 50.47 | 52.47 | 1.98 | < 0.001 | 0.596 | 0.679 | 0.760 | 0.775 | 0.260 |
| NDF | 52.15 | 53.06 | 48.28 | 49.44 | 48.34 | 49.59 | 1.17 | < 0.001 | 0.272 | 0.896 | 0.900 | 0.169 | 0.958 |
| ADF | 49.07 | 50.20 | 44.46 | 45.50 | 45.94 | 46.13 | 1.55 | < 0.001 | 0.397 | 0.968 | 0.341 | 0.571 | 0.694 |
TN, thermoneutral (21°C–24°C); HS, heat stress (30°C–34°C); ME: metabolizable energy; DM, dry matter; GE, gross energy; CP, crude protein; CF, crude fiber; NDF, neutral detergent fiber; ADF, acid detergent fiber.