Table 1.
Effects of high grain feeding and thiamine supplementation on rumen fermentation parameters in dairy cows.
| Item | Experimental treatments1 | SEM2 | P-value | ||
|---|---|---|---|---|---|
| CON | HG | HG+T | |||
| Ruminal pH | 6.35a | 5.67c | 6.06b | 0.078 | 0.003 |
| Thiamine (μg/L) | 8.97a | 2.89c | 4.81b | 0.23 | <0.001 |
| Lactate (mmol/L) | 0.49c | 1.81a | 1.06b | 0.079 | <0.001 |
| Acetate (mmol/L) | 66.73a | 59.89b | 69.83a | 2.17 | 0.027 |
| Propionate (mmol/L) | 22.63c | 28.22a | 24.81b | 1.54 | <0.001 |
| Isobutyrate (mmol/L) | 1.02b | 1.55a | 1.33a | 0.083 | 0.006 |
| Butyrate (mmol/L) | 10.69 | 11.72 | 10.85 | 0.49 | 0.460 |
| Isovalerate (mmol/L) | 1.73 | 1.95 | 2.13 | 0.12 | 0.216 |
| Valerate (mmol/L) | 1.28 | 1.39 | 1.58 | 0.093 | 0.105 |
| TVFA (mmol/L)3 | 104.08 | 104.72 | 110.53 | 2.5 | 0.142 |
a,b,c
Means within a row with different letters differ significantly (P < 0.05).
1
CON, control diet; HG, high grain diet; HG+T, high grain diet supplemented with 180 mg thiamine/kg DMI.
2
SEM, standard error of the mean.
3
TVFA, total volatile fatty acid.