Table 6.
The length and weight of small intestine sections relative to total small intestine length or weight of broilers fed diets supplemented with carbohydrases or prebiotic oligosaccharides
| Diet type | Additive | DW/TSIW | DL/TSIL | JW/TSIW | JL/TSIL | IW/TSIW | IL/TSIL |
|---|---|---|---|---|---|---|---|
| Simple effect means | |||||||
| Wheat | Control (1) | 166.9 | 16.58 | 421.6 | 40.81 | 411.5 | 42.61 |
| Xylanase 16 000 U kg−1 (2) | 178.4 | 17.31 | 450.7 | 42.75 | 371.0 | 40.58 | |
| Xylanase 32 000 U kg−1 (3) | 159.5 | 16.39 | 446.0 | 41.99 | 394.5 | 41.62 | |
| XOS (4) | 164.4 | 16.45 | 454.8 | 41.02 | 380.8 | 42.57 | |
| Barley | Control (5) | 165.9 | 18.03 | 445.3 | 41.22 | 388.8 | 40.75 |
| β‐Glucanase 16 000 U kg−1 (6) | 170.0 | 16.61 | 439.6 | 41.20 | 390.4 | 42.20 | |
| β‐Glucanase 32 000 U kg−1 (7) | 170.0 | 16.02 | 448.5 | 41.52 | 381.4 | 42.46 | |
| GOS (8) | 167.8 | 17.00 | 440.5 | 41.57 | 391.8 | 41.43 | |
| Pooled SEM | 6.53 | 0.611 | 12.07 | 0.514 | 13.56 | 0.433 | |
| Means for main effect of diet type | |||||||
| Wheat | 167.3 | 16.69 | 443.3 | 41.64 | 389.4 | 41.85 | |
| Barley | 168.4 | 16.91 | 443.5 | 41.38 | 388.1 | 41.71 | |
| Pooled SEM | 3.26 | 0.306 | 6.04 | 0.257 | 6.78 | 0.261 | |
| Means for main effect of additive type | |||||||
| Control | 166.4 | 17.31 | 433.5 | 41.01 | 400.1 | 41.68 | |
| 16 000 U kg−1 | 174.2 | 16.96 | 445.1 | 41.97 | 380.7 | 41.39 | |
| 32 000 U kg−1 | 164.7 | 16.21 | 447.3 | 41.75 | 338.0 | 42.04 | |
| Oligosaccharide | 166.1 | 16.73 | 447.7 | 41.30 | 386.3 | 42.00 | |
| Pooled SEM | 4.62 | 0.432 | 8.54 | 0.364 | 9.59 | 0.306 | |
| P‐values for main effects and interaction | |||||||
| Diet type | 0.807 | 0.602 | 0.981 | 0.474 | 0.889 | 0.655 | |
| Additive | 0.469 | 0.348 | 0.609 | 0.253 | 0.541 | 0.411 | |
| Diet type × additive | 0.536 | 0.304 | 0.393 | 0.174 | 0.376 | <0.001 | |
| P‐values for contrasts | |||||||
| 1 vs 2 | 0.002 | ||||||
| 1 vs 3 | 0.115 | ||||||
| 1 vs 4 | 0.952 | ||||||
| 5 vs 6 | 0.025 | ||||||
| 5 vs 7 | 0.009 | ||||||
| 5 vs 8 | 0.278 | ||||||
DW, JW and IW were analysed relative to total small intestine weight; DL, JL and IL were analysed relative to total small intestine length. DW, duodenum weight; DL, duodenum length; JW, jejunum weight; JL, jejunum length; IW, ileum weight; IL, ileum length; TSIL, total small intestine length; TSIW, total small intestine weight; XOS, xylo‐oligosaccharide; GOS, galacto‐oligosaccharide; means with different subscripts within the same diet type and column are significantly different (P < 0.05).