Items | FMS kg/d of dry mater | SEM | P-value | |||
---|---|---|---|---|---|---|
0 | 0.2 | 0.4 | 0.6 | |||
NH3-N (mg/ml) | 19.31 ± 0.12d | 18.32 ± 0.13c | 17.53 ± 0.11b | 16.91 ± 0.08a | 0.50 | 0.001 |
BUN (mg/dl) | 10.11 ± 0.13 | 10.03 ± 0.21 | 10.21 ± 0.43 | 10.03 ± 0.38 | 0.02 | 0.83 |
Total VFA (mM/L) | 99.50 ± 4.61a | 102.90 ± 4.61ab | 107.70 ± 3.52bc | 112.50 ± 4.23c | 2.82 | 0.004 |
VFA (mol/100 mol) | ||||||
 Acetic acid | 73.90 ± 0.67d | 73.00 ± 0.36c | 71.70 ± 0.94b | 70.20 ± 0.98a | 0.81 | 0.001 |
 Propionic acid | 16.50 ± 0.20a | 17.70 ± 0.19b | 19.30 ± 0.59c | 20.90 ± 0.74d | 0.95 | 0.001 |
 Butyric acid | 9.70 ± 0.53c | 9.20 ± 0.33b | 9.00 ± 0.39ab | 8.90 ± 0.26a | 0.18 | 0.002 |
 Acetic acid to Propionic acid | 4.50 ± 0.08d | 4.10 ± 0.06c | 3.80 ± 0.16b | 3.40 ± 0.16a | 0.23 | 0.001 |
Methane (mol/100 mol) | 32.60 ± 0.16d | 31.68 ± 0.14c | 30.59 ± 0.45b | 29.38 ± 0.55a | 0.69 | 0.001 |
pH | 6.82 ± 0.03 | 6.87 ± 0.02 | 6.84 ± 0.03 | 6.89 ± 0.02 | 0.02 | 0.13 |
Protozoa (×105Cell/ml) | 8.08 ± 0.07c | 6.65 ± 0.05b | 4.98 ± 0.07a | 4.40 ± 0.09a | 0.83 | 0.009 |