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Table 4 Effects of castration age 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 Castration agea SE Pr > |t|
C90 C180
  Growing period (3–12 months of age)   
Initial body weight (kg) 115.7 ± 12.2 112.8 ± 14.2 3.511 0.072
Final body weight (kg) 317.4 ± 28.8 308.3 ± 28.8 8.447 0.292
Average daily gain (kg) 0.74 ± 0.07 0.73 ± 0.08 0.023 0.914
Concentrate (DM, kg) 3.58 ± 0.58 3.58 ± 0.58
Rice straw (DM, kg) 1.78 ± 0.25 1.78 ± 0.25
Dry matter intake (kg) 5.36 ± 0.57 5.36 ± 0.57
Feed conversion ratio 7.24 ± 0.57 7.24 ± 0.64 0.188 0.991
  Early fattening period (13–22 months of age)   
Initial body weight (kg) 317.4 ± 28.8 308.3 ± 28.8 8.447 0.292
Final body weight (kg) 576.6 ± 50.4 577.7 ± 53.1 13.293 0.991
Average daily gain (kg) 0.86 ± 0.10 0.89 ± 0.12 0.031 0.224
Concentrate (DM, kg) 5.82 ± 1.11 5.82 ± 1.11
Rice straw (DM, kg) 2.39 ± 0.21 2.39 ± 0.21
Dry matter intake (kg) 8.21 ± 0.45 8.21 ± 0.45
Feed conversion ratio 9.88 ± 1.11 9.56 ± 1.54 0.350 0.351
  Late fattening period (23–31 months of age)   
Initial body weight (kg) 576.65 ± 51.52 577.72 ± 54.24 52.897 0.944
Final body weight (kg) 769.15 ± 70.94 774.56 ± 78.28 74.700 0.803
Average daily gain (kg) 0.67 ± 0.09 0.69 ± 0.16 0.128 0.682
Concentrate (DM, kg) 8.05 ± 0.71 8.13 ± 0.62
Rice straw (DM, kg) 0.96 ± 0.33 0.96 ± 0.33
Dry matter intake (kg) 9.01 ± 0.73 9.1 ± 0.62
Feed conversion ratio 12.82 ± 3.02 12.04 ± 2.09 2.595 0.511
  Entire period (3–31 months of age)   
Initial body weight (kg) 115.7 ± 12.2 112.8 ± 14.2 13.241 0.076
Final body weight (kg) 769.2 ± 70.9 774.6 ± 78.3 74.700 0.803
Average daily gain (kg) 0.76 ± 0.07 0.78 ± 0.08 0.079 0.449
Concentrate (DM, kg) 5.74 ± 2.36 5.76 ± 2.38
Rice straw (DM, kg) 1.71 ± 0.66 1.71 ± 0.66
Dry matter intake (kg) 7.45 ± 2.23 7.47 ± 2.24
Feed conversion ratio 9.73 ± 3.59 9.33 ± 3.11 3.361 0.665
  1. Means ± standard deviation
  2. aC90: castration at 90 days of age; C180: castration at 180 days of age