Table 4.
Effect of dietary supplementation with heat-inactivated compound probiotics on the organ index in yellow-feathered broilers.
| Item | Treatmenta | ||
|---|---|---|---|
| NC | PC | BFI | |
| Bursa index | |||
| 21 d | 0.30 ± 0.05 | 0.25 ± 0.02 | 0.23 ± 0.04 |
| 42 d | 0.18 ± 0.01 | 0.23 ± 0.04 | 0.26 ± 0.02 |
| 63 d | 0.13 ± 0.02 | 0.14 ± 0.02 | 0.10 ± 0.02 |
| Spleen index | |||
| 21 d | 0.17 ± 0.02 | 0.18 ± 0.02 | 0.15 ± 0.01 |
| 42 d | 0.17 ± 0.02 | 0.17 ± 0.01 | 0.19 ± 0.01 |
| 63 d | 0.15 ± 0.01 | 0.20 ± 0.03 | 0.20 ± 0.03 |
| Liver index | |||
| 21 d | 3.23 ± 0.18 | 3.48 ± 0.15 | 3.82 ± 0.15 |
| 42 d | 2.37 ± 0.11 | 2.16 ± 0.02 | 2.28 ± 0.10 |
| 63 d | 1.72 ± 0.05 | 1.64 ± 0.07 | 1.79 ± 0.11 |
| Heart index | |||
| 21 d | 0.62 ± 0.05 | 0.63 ± 0.04 | 0.59 ± 0.03 |
| 42 d | 0.43 ± 0.03 | 0.40 ± 0.02 | 0.48 ± 0.02 |
| 63 d | 0.34 ± 0.01 | 0.39 ± 0.03 | 0.37 ± 0.02 |
a
NC, negative control without in-feed antibiotics; PC, positive control containing 200 mg/kg of oxytetracycline calcium + 250 mg/kg of nasiheptide; BFI, compound probiotics supplementation at 500 mg/kg containing heat-inactivated Bacillus subtilis and Lactobacillus acidophilus BFI at a ratio of 1:1.
Results are shown as mean ± standard error (n = 6).