出雏不同时间雏鸡性比例变化规律的研究

STUDY ON THE REGULARITY IN THE SEXUAL PROPORTION OF CHICKS IN THE TIME OF HATCHING

本试验研究了出雏不同时间雏鸡性比例的变化规律。结果表明,出雏的不同时间,雏鸡性比例存在显著(P<0.05)、极显著(P<0.01)的差异,并呈现明显的规律性。20天时,母鸡最多,公母比值为0.350±0.030。至21天3小时,公鸡最多,公母比值为1.792±0.080。扫盘出雏结束时,公母比值为1.330±0.050。

The regularity in the sexual proportion of chicks in the time of hatching was studiedin the experiment. The results showed that the difference among the sexual proportionsof chicks was significant (P<0.05 or P<0.01), and an obvious regularity. At the begin-ning of the 20th day of incubation, the female proportion was the greatest and the ratioof males to females was 0.350±0.030. At the 3rd hour past the 21st day the male pro-portion was the greatest and the ratio of males to females was 1.792±0.080. Then themale proportion decreased. At the end of hatching the ratio of males to females was1.330±0.050.