Table 2.
Comparison of the slaughter performance of ducks among the three positions
| Items | Water curtain end | The middle position | Fan cooling end |
|---|---|---|---|
| Dressing weight (g) | 2054.550 ± 236.150Aa | 2088.500 ± 256.040Aa | 2486.610 ± 210.930Bb |
| Dressed percentage (%) | 80.740 ± 3.240Aa | 81.140 ± 3.050Aa | 77.110 ± 2.860Bb |
| Half eviscerated weight (g) | 1945.050 ± 222.930Aa | 1986.440 ± 229.860Aa | 2341.270 ± 200.290Bb |
| Half eviscerated yield (%) | 76.440 ± 3.210Aa | 77.230 ± 2.670Aa | 72.600 ± 2.670Bb |
| Eviscerated weight (g) | 1805.660 ± 206.510Aa | 1847.880 ± 213.740Aa | 2169.610 ± 189.810Bb |
| Eviscerated percentage (%) | 70.980 ± 3.250Aa | 71.850 ± 2.780Aa | 67.280 ± 2.800Bb |
| Breast muscle weight (g) | 122.870 ± 31.390Aa | 133.320 ± 32.260Aa | 164.790 ± 25.270Bb |
| Breast muscle percentage (%) | 13.450 ± 2.310a | 14.290 ± 2.400ab | 15.160 ± 1.560b |
| Breast brisket (mm) | 9.820 ± 2.230a | 10.060 ± 2.410a | 11.960 ± 2.620b |
| Leg muscle weight (g) | 116.210 ± 15.820Aa | 126.540 ± 15.630Aa | 140.100 ± 21.850Bb |
| Leg muscle percentage (%) | 12.890 ± 1.240a | 13.730 ± 1.160a | 12.930 ± 1.660a |
| Skin fat (g) | 330.050 ± 67.610Aa | 327.380 ± 70.390Aa | 446.770 ± 69.270Bb |
| Percentage of skin fat (%) | 18.140 ± 1.910Aa | 17.570 ± 2.120Aa | 20.550 ± 2.400Bb |
| Abdominal fat (g) | 19.630 ± 11.890a | 18.320 ± 9.760a | 26.930 ± 6.610b |
| Percentage of abdominal fat (%) | 1.050 ± 0.580a | 0.950 ± 0.440a | 1.230 ± 0.290a |
| Heart (g) | 12.600 ± 1.820Aa | 12.730 ± 2.040Aa | 15.600 ± 1.800Bb |
| Liver (g) | 50.290 ± 7.100Aa | 50.140 ± 8.540Aa | 66.610 ± 21.130Bb |
| Muscular stomach (g) | 49.630 ± 8.950a | 49.160 ± 8.180a | 56.430 ± 9.620b |
| Glandular stomach (g) | 6.510 ± 1.550Aa | 6.220 ± 1.050Aa | 8.340 ± 2.940Bb |
| Spleen (g) | 1.190 ± 0.400Aa | 1.110 ± 0.370Aa | 1.900 ± 0.970Bb |
| Spleen index (%) | 0.050 ± 0.010a | 0.040 ± 0.010a | 0.060 ± 0.030b |
| Bursa of Fabricius (g) | 0.940 ± 0.420Aa | 1.170 ± 0.420Aa | 1.850 ± 0.330Bb |
| Bursa of Fabricius index (%) | 0.040 ± 0.010Aa | 0.050 ± 0.020Aa | 0.060 ± 0.010Bb |
Note: Values are mean ± standard error. The column not sharing a common lowercase letters superscript represents significantly different (P < 0.05), while not sharing a common capital letters superscript is significantly different (P < 0.01)