Table 3.
Effects of chitosan oligosaccharides on intestinal mucosal morphology in yellow-feather heat-stressed broilers.
| Item1 | CON | HS | HSC | SEM | P value |
|---|---|---|---|---|---|
| Duodenum | |||||
| Villus height (μm) | 552.08a | 469.81b | 510.76a,b | 21.67 | 0.2927 |
| Crypt depth (μm) | 124.59 | 108.80 | 115.69 | 10.26 | 0.8104 |
| Villus height:crypt depth | 4.64 | 4.47 | 4.45 | 0.45 | 0.8993 |
| Jejunum | |||||
| Villus height (μm) | 429.46a | 305.17b | 391.93a | 25.70 | 0.1104 |
| Crypt depth (μm) | 98.02 | 85.36 | 78.22 | 11.20 | 0.7463 |
| Villus height:crypt depth | 4.53 | 3.96 | 5.21 | 0.56 | 0.4395 |
| Ileum | |||||
| Villus height (μm) | 353.65a | 223.11b | 304.37a | 25.71 | 0.0055 |
| Crypt depth (μm) | 71.22 | 57.42 | 74.96 | 7.10 | 0.4106 |
| Villus height:crypt depth | 5.15a | 4.07b | 4.08b | 0.38 | 0.0669 |
a,bDifferent superscript letters within the same row means significant difference (P < 0.05).
1
COS, chitosan oligosaccharides; CON group, basal diet and raised under normal temperature (24°C); HS group, basal diet and raised under cycle heat stress (34°C from 10:00–18:00 and 24°C for the rest time); HSC group, basal diet with 200 mg/kg COS supplementation and raised under cycle heat stress.