Table 5.
Phytase, FTU/kg | Xylanase, BXU/kg | Acetic | Propionic | Butyric | Iso-butyric | 2-Me-butyric | Iso-valeric | Lactic | BCFAs4 | VFAs5 | Total SCFAs6 |
---|---|---|---|---|---|---|---|---|---|---|---|
Main effect means for phytase | |||||||||||
500 (STD) | 62.11 | 1.01 | 11.33 | 0.04 | 0.05 | 0.00 | 25.69 | 0.09 | 74.69 | 100.25 | |
1,500 (SD) | 63.78 | 1.28 | 11.83 | 0.12 | 0.03 | 0.03 | 23.70 | 0.17 | 77.04 | 100.88 | |
3,000 (MD) | 67.31 | 1.51 | 11.88 | 0.09 | 0.00 | 0.02 | 29.56 | 0.11 | 80.69 | 110.31 | |
Least significant difference | 8.42 | 0.60 | 3.61 | 0.11 | 0.07 | 0.05 | 10.02 | 0.14 | 11.85 | 9.30 | |
Main effect means for xylanase | |||||||||||
0 (−Xyl) | 65.37 | 1.40 | 12.05 | 0.09 | 0.00 | 0.01 | 25.13 | 0.10 | 78.92 | 104.13 | |
16,000 (+Xyl) | 63.43 | 1.14 | 11.31 | 0.08 | 0.05 | 0.02 | 27.51 | 0.14 | 76.02 | 103.50 | |
Least significant difference | 6.87 | 0.49 | 2.95 | 0.09 | 0.06 | 0.04 | 8.18 | 0.11 | 9.68 | 7.59 | |
Standard deviation | 11.79 | 0.84 | 5.06 | 0.15 | 0.10 | 0.07 | 14.03 | 0.20 | 16.60 | 13.02 | |
P-value for main effects and interactions3 | |||||||||||
Phytase | 0.452 | 0.254 | 0.943 | 0.353 | 0.344 | 0.541 | 0.500 | 0.505 | 0.592 | 0.062 | |
Xylanase | 0.577 | 0.310 | 0.623 | 0.733 | 0.069 | 0.759 | 0.564 | 0.496 | 0.554 | 0.870 | |
Phytase × Xylanase | 0.862 | 0.139 | 0.922 | 0.465 | 0.344 | 0.203 | 0.093 | 0.428 | 0.838 | 0.166 |
Data are means of 5 birds per pen with 8 pens per treatment.
Diets consisted in 6 experimental treatments: STD-Xyl (diet containing standard dose of phytase without xylanase), STD + Xyl (diet containing standard dose of phytase with xylanase), SD-Xyl (diet containing superdosing of phytase without xylanase), SD + Xyl (diet containing superdosing with xylanase), MD-Xyl (diet containing megadosing of phytase without xylanase) and MD + Xyl (diet containing megadosing with xylanase).
Values in the same column with different letters are significantly different (P < 0.05).
BCFA: branched-chain fatty acids (iso-butyric + 2-me-butyric + iso-valeric).
VFA: volatile fatty acids (acetic acid + propionic acid + butyric acid + BCFA).
Total SCFA: total short-chain fatty acids (VFA + lactic acid).