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. 2020 Feb 26;99(4):2068–2077. doi: 10.1016/j.psj.2019.11.051

Table 4.

Concentration of ceca short-chain fatty acids (SCFA) (mmol/L) in broilers measured at day 28.1,2

Phytase, FTU/kg Xylanase, BXU/kg Acetic Propionic Butyric Iso-butyric 2-Me-butyric Iso-valeric Lactic BCFAs4 VFAs5 Total SCFAs6
Main effects means for phytase
 500 (STD) 90.69 4.39 22.61 1.00 0.21 0.31 9.19 1.52 119.19 128.63
 1,500 (SD) 93.09 4.04 21.93 0.92 0.11 0.23 10.69 1.25 120.25 131.13
 3,000 (MD) 94.10 4.01 23.40 0.91 0.08 0.21 9.94 1.19 122.75 132.63
 Least significant difference 8.56 0.78 4.26 0.12 0.26 0.22 4.91 0.48 11.22 13.26
Main effect means for xylanase
0 (−Xyl) 91.89 4.08 22.28 0.97 0.15 0.29 10.04 1.41 119.63 129.88
16,000 (+Xyl) 93.37 4.22 23.01 0.91 0.10 0.20 9.83 1.23 121.83 131.71
Least significant difference 6.99 0.63 3.48 0.10 0.21 0.18 4.01 0.39 9.16 10.82
Standard deviation 11.99 1.09 5.97 0.16 0.36 0.31 6.88 0.68 15.73 18.58
P-value for main effects and interaction3
Phytase 0.719 0.552 0.778 0.217 0.549 0.613 0.825 0.332 0.808 0.832
Xylanase 0.676 0.652 0.668 0.219 0.625 0.345 0.916 0.332 0.631 0.737
Phytase × Xylanase 0.205 0.483 0.913 0.598 0.788 0.809 0.532 0.859 0.301 0.242
1

Data are means of 5 birds per pen with 8 pens per treatment.

2

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).

3

Values in the same column with different letters are significantly different (P < 0.05).

4

BCFA: branched-chain fatty acids (iso-butyric + 2-me-butyric + iso-valeric).

5

VFA: volatile fatty acids (acetic acid + propionic acid + butyric acid + BCFA).

6

Total SCFA: total short-chain fatty acids (VFA + lactic acid).