Item1 | CB− | CB+  | SEM | P-value | ||||
---|---|---|---|---|---|---|---|---|
RPF− | RPF+  | RPF− | RPF+  | CB | RPF | CB × RPF | ||
Growth performance | ||||||||
 Initial BW, kg | 20.7 | 20.5 | 21.7 | 21.7 | 0.75 | 0.163 | 0.865 | 0.916 |
 Final BW, kg | 30.1 | 31.5 | 31.0 | 31.7 | 1.23 | 0.552 | 0.295 | 0.733 |
 DMI, g/d | 1010 | 1137 | 982 | 1095 | 40.6 | 0.367 | 0.005 | 0.852 |
 ADG, g/d | 135.3 | 158.9 | 134.3 | 145.8 | 8.82 | 0.430 | 0.058 | 0.499 |
 FCR | 7.66 | 7.22 | 7.54 | 7.61 | 0.410 | 0.733 | 0.648 | 0.519 |
Carcass traits | ||||||||
 LWBS, kg | 29.0b | 31.9a | 32.1a | 32.0a | 1.21 | 0.030 | 0.050 | 0.041 |
 HCW, kg | 13.2 | 14.6 | 14.5 | 14.9 | 0.68 | 0.093 | 0.046 | 0.258 |
 Dressing, % | 45.5 | 45.8 | 45.1 | 46.5 | 1.87 | 0.759 | 0.580 | 0.714 |
 Back fat, mm | 2.53 | 2.77 | 2.52 | 2.59 | 0.066 | 0.100 | 0.006 | 0.980 |
Organ weight, kg | ||||||||
 Liver | 0.46 | 0.54 | 0.52 | 0.52 | 0.024 | 0.470 | 0.151 | 0.185 |
 Heart | 0.12 | 0.14 | 0.14 | 0.13 | 0.045 | 0.847 | 0.346 | 0.199 |
 Spleen | 0.04 | 0.05 | 0.06 | 0.06 | 0.004 | 0.011 | 1.000 | 0.141 |
 Kidney | 0.11 | 0.12 | 0.11 | 0.12 | 0.010 | 0.999 | 0.535 | 0.754 |
% of LWBS | ||||||||
 Liver | 1.60 | 1.68 | 1.61 | 1.64 | 0.108 | 0.877 | 0.626 | 0.815 |
 Heart | 0.43 | 0.45 | 0.43 | 0.42 | 0.024 | 0.530 | 0.765 | 0.533 |
 Spleen | 0.15 | 016 | 0.20 | 0.18 | 0.015 | 0.045 | 0.699 | 0.400 |
 Kidney | 0.38 | 0.37 | 0.35 | 0.37 | 0.039 | 0.617 | 0.953 | 0.807 |