Table 6.
Effects of live yeast or live yeast combined with zinc oxide on volatile fatty acids concentration in feces on d 28 of nursery pigs.
| Items (mg/g) | CTR 1 | CTC-ZnO 1 | LY 1 | LY-ZnO 1 | SEM | p-Value |
|---|---|---|---|---|---|---|
| Acetic acid | ||||||
| d 14 | 1.55 | 1.51 | 1.54 | 1.66 | 0.109 | 0.78 |
| d 28 | 1.62 | 1.55 | 1.74 | 1.97 | 0.112 | 0.07 |
| Propionic acid | ||||||
| d 14 | 0.71 b | 0.82 ab | 0.92 a | 0.99 a | 0.057 | 0.02 |
| d 28 | 1.00 | 1.01 | 1.12 | 1.20 | 0.072 | 0.20 |
| Butyric acid | ||||||
| d 14 | 0.70 b | 0.77 b | 0.95 a | 0.97 a | 0.046 | <0.01 |
| d 28 | 0.73 b | 0.81 b | 0.95 b | 1.16 a | 0.062 | <0.01 |
| Isovaleric acid | ||||||
| d 14 | 0.24 | 0.26 | 0.33 | 0.29 | 0.024 | 0.08 |
| d 28 | 0.31 | 0.31 | 0.37 | 0.30 | 0.024 | 0.15 |
| Valeric acid | ||||||
| d 14 | 0.27 | 0.25 | 0.29 | 0.29 | 0.011 | 0.06 |
| d 28 | 0.26 | 0.25 | 0.29 | 0.29 | 0.013 | 0.09 |
| Total volatile fatty acid | ||||||
| d 14 | 3.62 b | 3.78 b | 4.17 a | 4.32 a | 0.131 | <0.01 |
| d 28 | 4.05 b | 4.07 b | 4.64 ab | 5.09 a | 0.174 | <0.01 |
Note: SEM is standard error of mean. n = 8 indicating the data was analyzed in 8 pigs per treatment. a,b Within a row, different superscripts mean significant difference (p < 0.05). 1 CTR: control; CTC-ZnO: chlortetracycline + zinc oxide; LY: live yeast; LY-ZnO: live yeast + zinc oxide.