Table 3.
Concentrations of volatile fatty acids (VFA) and pH value in faeces samples of weaned pigs fed a control diet or a diet supplemented with 1% grape seed and grape marc meal extract (GSGME) or 1% spent hops (SH)
| Control | GSGME | SH | |
|---|---|---|---|
| VFA (μmol/g digesta) | |||
| Total VFA | 581 ± 111 | 497 ± 90* | 524 ± 41# |
| Acetic acid | 332 ± 75 | 282 ± 64# | 310 ± 31 |
| Propionic acid | 141 ± 33 | 115 ± 21* | 120 ± 16# |
| Isobutyric acid | 10.4 ± 2.5 | 10.6 ± 2.3 | 11.8 ± 2.3 |
| Butyric acid | 66.1 ± 9.6 | 61.9 ± 18.5 | 53.5 ± 13.0* |
| Isovaleric acid | 12.9 ± 3.3 | 13.2 ± 3.9 | 13.5 ± 2.2 |
| Valeric acid | 17.7 ± 4.4 | 14.2 ± 3.7# | 14.8 ± 3.8# |
| Faecal pH value | 5.9 ± 0.1 | 6.2 ± 0.2* | 6.2 ± 0.3* |
Results are shown as mean ± SD (n = 16/group). *Significantly different from control (P < 0.05). #Tended to differ from control (0.05 ≤ P ≤ 0.10).