Table 5. Effects of mannan level of diet and β-mannanase supplementation on fecal volatile fatty acids and ammonium concentrations1.
| Items | Mannan levels |
β-mannanase |
SEM3 | P-value2 |
|||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | 0 | 0.4 | 0.8 | M | E | M×E | ||
| Acetic acid (µmol/N) | 83.6 | 83.3 | 82.7 | 84.2 | 83.5 | 2.59 | 0.88 | 0.84 | 0.9 |
| Propionic acid (µmol/N) | 19.1 | 19.4 | 19.2 | 17.8 | 20.8 | 1.17 | 0.77 | 0.09 | 0.13 |
| Butyric acid (µmol/N) | 7.11 | 7.24 | 7.27 | 7.04 | 7.23 | 0.23 | 0.37 | 0.72 | 0.87 |
| NH3-N (ppm) | 319 | 320 | 318 | 320 | 321 | 2.5 | 0.84 | 0.62 | 0.78 |
1
Values are mean of 8 replicates of 5 hens each.
2
P-values: M: effect of mannan level of diets; E: effect of enzyme (β-mannanase) and M×E: interaction between mannan level of diet and β-mannanase.
3
Standard error of the mean.