Items | Low RFI | High RFI | SEM | P valuea | ||
---|---|---|---|---|---|---|
RFI | Day | RFI × Day | ||||
pH | 6.41 | 6.30 | 0.08 | 0.35 | 0.54 | 0.86 |
Total VFA, mmol/L | 101 | 108 | 3.84 | 0.18 | 0.21 | 0.22 |
Molar proportion, mmol/100 mmol | ||||||
 Acetate (A) | 65.1 | 64.2 | 0.86 | 0.46 | 0.28 | 0.61 |
 Propionate (P) | 20.2 | 21.5 | 0.94 | 0.36 | 0.08 | 0.40 |
 Butyrate | 11.1 | 10.8 | 0.39 | 0.71 | 0.17 | 0.87 |
 Isobutyrate | 0.72 | 0.68 | 0.04 | 0.44 | < 0.01 | 0.43 |
 Valerate | 1.45 | 1.45 | 0.05 | 0.98 | < 0.01 | 0.30 |
 Isovalerate | 1.45 | 1.30 | 0.08 | 0.21 | 0.06 | 0.71 |
 A: P ratio | 3.29 | 3.11 | 0.18 | 0.46 | 0.07 | 0.40 |
Apparent digestibilityb | ||||||
 DM, % | 64.0 | 64.4 | 0.87 | 0.73 | 0.12 | 0.43 |
 CP, % | 65.4 | 66.2 | 1.55 | 0.73 | 0.24 | 0.69 |
 NDF, % | 35.9 | 35.4 | 1.02 | 0.74 | 0.02 | 0.22 |
 ADF, % | 33.7 | 32.9 | 1.06 | 0.60 | 0.30 | 0.28 |