Table 2.
Observed rumen fermentation parameters of dairy cows from SC and MA groups.
| Item | SC 1 | MA 2 | SEM | p-Value |
|---|---|---|---|---|
| Rumen pH | 6.63 | 6.56 | 0.06 | 0.69 |
| Ammonia nitrogen, mg/dL | 6.24 | 7.11 | 0.46 | 0.46 |
| Total volatile fatty acid, mmol/L | 85.10 | 83.96 | 3.97 | 0.37 |
| Molar proportion, mmol/100 mmol | ||||
| Acetate (A) | 64.67 b | 70.38 a | 0.77 | <0.01 |
| Propionate (P) | 19.30 | 17.48 | 0.45 | 0.10 |
| Butyrate | 11.86 a | 9.00 b | 0.46 | <0.01 |
| Isobutyrate | 1.08 | 0.86 | 0.07 | 0.13 |
| Valerate | 1.39 a | 1.10 b | 0.05 | 0.01 |
| Isovalerate | 1.69 a | 1.17 b | 0.11 | 0.02 |
| A:P ratio | 3.41 b | 4.04 a | 0.12 | 0.01 |
1 SC, high-SCC cows with healthy patterns. 2 MA, high-SCC cows with mastitis patterns. a,b Means within the same row followed by different superscripts differ at p < 0.05.