海兰褐蛋鸡排粪便次数的昼夜与季节差异

The diurnal and seasonal variation in defecation of Hyline Brown layers

选择48只产蛋后期健康海兰褐蛋鸡作为试验动物,分别于春季、夏季和冬季观察昼夜不同时间的排粪次数。结果：海兰褐蛋鸡每小时排粪便次数,春季和冬季多于夏季,晚上少于上午和下午,差异显著（P〈0.05）。海兰褐蛋鸡排正常粪便和盲肠粪便的次数比值,春季和夏季极显著大于冬季（P〈0.01）,而昼夜间差异不显著。

48 healthy Hyline Brown layers in their late period of laying were used as experimental samples to investigate their times of defe- cation during the day and the night in spring, summer and winter, respectively. The results were ： （1） The times of defecation per hour by the birds in summer were far less than in spring and winter, and also far less in the evening than in the forenoon and afternoon. All differ- ences were significant （P〈0. 05）; （2） The ratio of the amount of normal feces to the amount of cecal feces was significantly lower （P〈 0. 01 ） in winter than in spring and summer, but this ratio showed no significant difference between day and night.