【摘要】 本试验利用七批种蛋的孵化出雏,观察统计了55635只初生雏的性别情况。结果表明,出雏不同阶段的公母雏鸡性比存在着极显著的差异,这种差异表现在20天12小时以前出雏的鸡,公鸡比母鸡少,20天12小时以后出雏的鸡,公鸡比母鸡多,特别是20天22小时后,公鸡比母鸡多50％以上。更多还原

【Abstract】 The Sexual ratios of newly hatched chickens were observed in different hatched time. The results showed that there were significant differences (P<0.01) among the sexual ratios.更多还原