Table 6.
In situ degradation parameters of dry matter and crude protein of experimental diets containing 40% of alfalfa hay and 60% of concentrate with increased amounts of Brussels sprouts (BS; 8, 16, and 24% of concentrate).
| Item 1 | Diet | SEM 2 | p | ||||
|---|---|---|---|---|---|---|---|
| Control | BS8 | BS16 | BS24 | Lineal | Quadratic | ||
| Dry matter | |||||||
| a (%) | 33.6 a | 34.7 a | 37.9 b | 40.5 c | 0.33 | <0.001 | 0.269 |
| b (%) | 45.6 b | 44.6 b | 42.5 a | 40.9 a | 0.34 | 0.001 | 0.628 |
| a + b (%) | 79.2 | 79.4 | 80.4 | 81.4 | 0.59 | 0.141 | 0.705 |
| c (h−1) | 0.262 | 0.240 | 0.206 | 0.238 | 0.0102 | 0.227 | 0.180 |
| ED (%) | 72.7 a | 72.7 a | 73.2 ab | 75.1 b | 0.67 | 0.042 | 0.192 |
| Crude protein | |||||||
| a (%) | 35.7 a | 47.2 c | 45.8 b | 49.1 d | 0.23 | <0.001 | <0.001 |
| b (%) | 55.9 c | 44.5 b | 45.7 b | 42.2 a | 0.34 | <0.001 | 0.001 |
| a + b (%) | 91.6 | 91.7 | 91.5 | 91.3 | 0.23 | 0.551 | 0.728 |
| c (h−1) | 0.167 a | 0.176 ab | 0.227 bc | 0.242 c | 0.0091 | 0.008 | 0.871 |
| ED (%) | 80.2 a | 83.1 b | 84.3 b | 85.0 b | 0.77 | 0.004 | 0.211 |
a, b, c Means in the same row with different superscript differ (p < 0.05); 1 a: soluble fraction; b: non-soluble potentially degradable fraction; c: fractional degradation rate of b fraction; ED: effective degradability calculated for a rumen passage rate of 0.042 h−1; 2 SEM: standard error of the mean.