Table 2. Effects of dietary CP levels or oscillating dietary CP on apparent and true ruminal digestibilities of dietary nutrients in dual-flow continuous culture system.
| Item1 | Treatment, CP% | SEM | P-value | |||||
|---|---|---|---|---|---|---|---|---|
| 10% | 12% | 14% | OSC | OSC vs. 12% | Linear | Quadratic | ||
| Apparent Ruminal Digestibility, % | ||||||||
| DM | 21.0 | 22.4 | 19.9 | 21.2 | 1.52 | 0.55 | 0.59 | 0.27 |
| OM | 24.1 | 24.6 | 20.9 | 22.9 | 1.44 | 0.30 | 0.07 | 0.16 |
| NDF | 36.3 | 38.9 | 37.7 | 39.7 | 3.40 | 0.82 | 0.72 | 0.59 |
| ADF | 21.3 | 20.4 | 20.8 | 23.9 | 2.77 | 0.30 | 0.87 | 0.83 |
| True Ruminal Digestibility, % | ||||||||
| DM | 41.8 | 39.0 | 39.1 | 43.6 | 2.21 | 0.15 | 0.39 | 0.61 |
| OM | 39.2 | 37.2 | 36.0 | 39.0 | 1.88 | 0.46 | 0.21 | 0.84 |
1DM = dry matter; OM = organic matter; NDF = neutral detergent fiber; ADF = acid detergent fiber.