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Table 2 Effects of weaning and castration ages on growth performance of Hanwoo steers

From: Effects of weaning and castration ages on growth performance, blood metabolites, and carcass characteristics in Hanwoo steers

Item Treatmentc P-value
W80C90 W80C180 W130C90 W130C180
  Growing period (3–12 months of age)  
Initial body weight (kg) 112.7 ± 12.3 114.9 ± 13.8 118.7 ± 10.8 110.7 ± 13.7 0.062
Final body weight (kg) 314.6 ± 31.3 317.5 ± 29.2 320.2 ± 24.0 299.0 ± 23.8 0.277
Average daily gain (kg) 0.74 ± 0.08 0.75 ± 0.08 0.74 ± 0.07 0.70 ± 0.06 0.362
Concentrate (DM, kg) 3.58 ± 0.58 3.58 ± 0.58 3.58 ± 0.58 3.58 ± 0.58
Rice straw (DM, kg) 1.78 ± 0.25 1.78 ± 0.25 1.78 ± 0.25 1.78 ± 0.25
Dry matter intake (kg) 5.36 ± 0.57 5.36 ± 0.57 5.36 ± 0.57 5.36 ± 0.57
Feed conversion ratio 7.24ab ± 0.60 6.96b ± 0.65 7.24ab ± 0.51 8.68a ± 0.53 0.011
  Early fattening period (13–22 months of age)  
Initial body weight (kg) 314.6 ± 31.3 317.5 ± 29.2 320.2 ± 24.0 299.0 ± 23.8 0.277
Final body weight (kg) 569.5 ± 40.5 584.7 ± 56.2 583.8 ± 57.8 570.7 ± 48.9 0.828
Average daily gain (kg) 0.84 ± 0.05 0.88 ± 0.11 0.87 ± 0.12 0.90 ± 0.13 0.500
Concentrate (DM, kg) 5.82 ± 1.11 5.82 ± 1.11 5.82 ± 1.11 5.82 ± 1.11
Rice straw (DM, kg) 2.39 ± 0.21 2.39 ± 0.21 2.39 ± 0.21 2.39 ± 0.21
Dry matter intake (kg) 8.21 ± 0.45 8.21 ± 0.45 8.21 ± 0.45 8.21 ± 0.45
Feed conversion ratio 10.06 ± 0.77 9.70 ± 1.41 9.71 ± 1.31 9.41 ± 1.59 0.714
  Late fattening period (23–31 months of age)  
Initial body weight (kg) 569.5 ± 40.5 584.7 ± 56.2 583.8 ± 57.8 570.7 ± 48.9 0.838
Final body weight (kg) 756.5 ± 60.1 783.0 ± 79.3 781.8 ± 75.6 766.1 ± 72.9 0.793
Average daily gain (kg) 0.65 ± 0.09 0.69 ± 0.12 0.69 ± 0.08 0.68 ± 0.17 0.868
Concentrate (DM, kg) 7.97 ± 0.81 8.13 ± 0.64 8.13 ± 0.64 8.13 ± 0.64
Rice straw (DM, kg) 0.96 ± 0.34 0.96 ± 0.34 0.96 ± 0.34 0.96 ± 0.34
Dry matter intake (kg) 8.93 ± 0.83 9.09 ± 0.64 9.10 ± 0.64 9.10 ± 0.64
Feed conversion ratio 13.77 ± 3.93 11.98 ± 2.03 11.87 ± 1.66 12.10 ± 2.39 0.642
  Entire period (3–31 months of age)  
Initial body weight (kg) 112.7 ± 12.3 114.9 ± 13.8 118.7 ± 10.8 110.7 ± 13.7 0.062
Final body weight (kg) 756.5 ± 60.1 783.0 ± 79.3 781.8 ± 75.6 766.1 ± 72.9 0.793
Average daily gain (kg) 0.75 ± 0.06 0.78 ± 0.07 0.77 ± 0.05 0.77 ± 0.08 0.739
Concentrate (DM, kg) 5.72 ± 2.33 5.78 ± 2.37 5.75 ± 2.43 5.75 ± 2.43
Rice straw (DM, kg) 1.73 ± 0.65 1.73 ± 0.65 1.69 ± 0.67 1.69 ± 0.67
Dry matter intake (kg) 7.45 ± 2.17 7.50 ± 2.19 7.45 ± 2.33 7.45 ± 2.33
Feed conversion ratio 10.2 ± 4.09 9.35 ± 3.05 9.26 ± 3.11 9.30 ± 3.31 0.879
  1. Means ± standard deviation
  2. a,bMeans with different superscripts within the same row are significantly different (P < 0.05)
  3. cW80C90: weaning at 80 days of age and castration at 90 days of age; W80C180: weaning at 80 days of age and castration at 180 days of age; W130C90: weaning at 130 days of age and castration at 90 days of age; W130C180: weaning at 130 days of age and castration at 180 days of age