Table 4.
Changes in carcass traits of Muscovy ducks (n = 6/group).
| Items | Control group | Group Ⅰ | Group Ⅱ | P value |
|---|---|---|---|---|
| Dressed percentage, % | 82.77 ± 4.39 | 84.15 ± 6.61 | 87.75 ± 2.22 | 0.31 |
| Percentage of half-eviscerated yield with giblet, % | 75.50 ± 4.57 | 77.00 ± 6.09 | 80.34 ± 2.37 | 0.26 |
| Percentage of eviscerated yield, % | 68.54 ± 4.22 | 70.67 ± 5.84 | 72.80 ± 2.09 | 0.40 |
| Percentage of abdominal fat yield, % | 1.30 ± 0.43B | 0.93 ± 0.49B | 2.25 ± 0.56A | P < 0.01 |
| Percentage of breast muscle yield, % | 9.34 ± 1.84B | 8.98 ± 1.62B | 13.31 ± 1.04A | P < 0.01 |
| Percentage of leg muscle yield, % | 14.16 ± 1.41 | 14.68 ± 3.73 | 13.62 ± 1.17 | 0.67 |
| Heart index | 4.82 ± 0.35B | 4.81 ± 0.31B | 5.29 ± 0.64A | P < 0.01 |
| Liver index | 20.28 ± 2.27 | 20.36 ± 2.18 | 20.00 ± 2.96 | 0.81 |
| Spleen index | 0.61 ± 0.12B | 0.70 ± 0.16B | 0.82 ± 0.22A | P < 0.01 |
| Bursal index | 0.78 ± 0.27 | 0.86 ± 0.36 | 0.56 ± 0.27 | 0.24 |
Note: In the same row, no letter or the same letter superscripts: no significant difference (P > 0.05). Different small letter superscripts: significant difference (P < 0.05). Different capital letter superscripts: significant difference (P < 0.01).