Table 7.
The intestinal morphology of 21-day-old broiler chickens in different treatment groups.
| Position | Indicator | Control group | ABG | ABP1 | ABP2 |
|---|---|---|---|---|---|
| Ileum | Villus length | 0.997 ± 0.035 | 1.025 ± 0.071 | 0.984 ± 0.056 | 1.088 ± 0.045 |
| Crypt depth | 0.172 ± 0.016 | 0.169 ± 0.008 | 0.163 ± 0.009 | 0.162 ± 0.013 | |
| V/C | 6.02 ± 0.75a | 6.13 ± 0.56 | 6.10 ± 0.23 | 6.90 ± 0.76b | |
| Jejunum | Villus length | 0.669 ± 0.083a | 0.687 ± 0.069 | 0.670 ± 0.036a | 0.756 ± 0.044b |
| Crypt depth | 0.154 ± 0.006 | 0.157 ± 0.021 | 0.163 ± 0.015 | 0.149 ± 0.012 | |
| V/C | 4.49 ± 0.49 | 4.47 ± 0.34 | 4.13 ± 0.17a | 5.18 ± 0.43b | |
| Duodenum | Villus length | 1.151 ± 0.078 | 1.186 ± 0.053 | 1.083 ± 0.066 | 1.218 ± 0.067 |
| Crypt depth | 0.214 ± 0.009a | 0.187 ± 0.08b | 0.187 ± 0.021b | 0.189 ± 0.01b | |
| V/C | 5.60 ± 0.35a | 6.07 ± 0.27 | 5.82 ± 0.30 | 6.44 ± 0.35b |
a,bIn the same line, the same letter superscripts mean no significant difference (P > 0.05), and the different letter superscripts mean significant difference (P < 0.05).
Abbreviations: ABG, antibiotic group; ABP1, antibacterial peptide group 1; ABP2, antibacterial peptide group 2; V/C, the ratio of villi length to crypt depth.