Table 7.
Effects of subclinical necrotic enteritis challenge, diet type and supplemental enzymes on jejunal and ileal digesta viscosity in millipascal-seconds (mPa·s) in broilers at 16 and 21 d of age.1,2
Challenge | Diet type | Enzyme | Jejunum |
Ileum |
||
---|---|---|---|---|---|---|
d 16 | d 21 | d 16 | d 21 | |||
Two-way interactions | ||||||
No | Wheat | 2.90 | 2.27ab | 3.23 | 2.75 | |
Maize | 1.93 | 2.06bc | 2.55 | 3.05 | ||
Yes | Wheat | 2.89 | 2.41a | 3.00 | 2.94 | |
Maize | 1.70 | 1.83c | 2.21 | 2.81 | ||
Wheat | Control | 4.12a | 2.55a | 4.15a | 3.25a | |
XYN10 | 2.64b | 2.40ab | 2.90b | 3.01ab | ||
XYN11 | 1.95c | 2.07bcd | 2.64b | 2.75ab | ||
MAN | 2.72b | 2.35abc | 2.87b | 2.34b | ||
Maize | Control | 1.83c | 1.80d | 2.21b | 2.24b | |
XYN10 | 1.77c | 1.99d | 2.33b | 3.09ab | ||
XYN11 | 1.80c | 2.01cd | 2.51b | 3.29a | ||
MAN | 1.85c | 1.97d | 2.49b | 3.01ab | ||
SEM3 | 0.091 | 0.047 | 0.079 | 0.102 | ||
P-value | ||||||
Challenge | 0.366 | 0.582 | 0.021 | 0.881 | ||
Diet type | <0.001 | <0.001 | <0.001 | 0.770 | ||
Enzyme | <0.001 | 0.517 | <0.001 | 0.404 | ||
Challenge × diet type | 0.106 | 0.025 | 0.441 | 0.387 | ||
Challenge × enzyme | 0.070 | 0.839 | 0.146 | 0.716 | ||
Diet type × enzyme | <0.001 | 0.038 | <0.001 | 0.030 | ||
Challenge × diet type × enzyme | 0.267 | 0.490 | 0.180 | 0.384 |
a-d Within a column, means with no common superscripts differ significantly (P < 0.05).
Means are based on 6 replicates per treatment with 4 birds per replicate on d 16 and 3 birds per replicate on d 21.
Control = no enzyme; XYN10 = xylanase from family 10; XYN11 = xylanase from family 11; MAN = β-mannanase.
SEM = standard error of the mean.