Table 5. Characterisation of the effect of residual feed intake on the total volatile fatty acid (VFA) concentration and molar proportions in the caecum (Least square means and SEM).
| RFIa | Highb | Low | SEM | P-value |
|---|---|---|---|---|
| Caecumcd | ||||
| Total VFA (mmol/g digesta) | 23.22 | 33.81 | 3.792 | 0.072 |
| Molar proportions | ||||
| Acetic | 0.84 | 0.82 | 0.02 | 0.382 |
| Propionic | 0.05 | 0.04 | 0.01 | 0.621 |
| Butyric | 0.07 | 0.10 | 0.01 | 0.078 |
| Valeric | 0.02 | 0.02 | 0.00 | 0.869 |
| Iso-Butyric | 0.02 | 0.03 | 0.01 | 0.424 |
a RFI: Residual feed intake;
b High = RFI was >0.5 SD above the mean; medium = RFI was ±0.5 SD above and below the mean; low = RFI was <−0.5 SD below the mean.
c Digesta samples collected post slaughter d105
d Eight pigs per RFI group