Table 2.
Mean molar proportions and standard deviation (SD) of individual rumen volatile fatty acids (VFA) and mean concentration and SD of total VFAs, lactate and ammonia for high RFI (HRFI) and low RFI (LRFI) bulls.
| HRFI | SD | LRFI | SD | P-value | |
|---|---|---|---|---|---|
| HRFI n = 15 LRFI n = 14 | |||||
| Acetic | 0.52 | 0.07 | 0.56 | 0.06 | NS |
| Propionic | 0.32 | 0.07 | 0.26 | 0.08 | <0.05 |
| A:P | 1.78 | 0.70 | 2.45 | 0.94 | <0.05 |
| Iso-butyric | 0.01 | 0.01 | 0.02 | 0.01 | NS |
| Butyric | 0.10 | 0.02 | 0.13 | 0.04 | <0.1 |
| Iso-valeric | 0.10 | 0.07 | 0.02 | 0.01 | NS |
| Valeric | 0.04 | 0.01 | 0.04 | 0.02 | NS |
| Total VFA (mmol/L) | 115.9 | 27.9 | 109.9 | 28 | NS |
| Ammonia (g/L) | 20.70 | 14.00 | 41.70 | 51.90 | NS |
| Lactate (ng/100) | 0.20 | 0.26 | 0.26 | 0.32 | NS |
P-values are derived using a Student’s T-test to assess the differences between treatments.