Season | Male | Female | ||
---|---|---|---|---|
Numbers of calf | Mean of birth weight (kg ± SD) | Numbers of calf | Mean of birth weight (kg ± SD) | |
Spring | 7,700 | 30.69 ± 4.41a | 7,183 | 28.35 ± 3.81a |
Summer | 5,126 | 30.03 ± 4.05c | 4,997 | 27.72 ± 3.69b |
Autumn | 4,362 | 30.46 ± 4.35b | 3,841 | 28.28 ± 3.80a |
Winter | 3,790 | 30.62 ± 4.35ab | 3,995 | 28.24 ± 3.90a |