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为揭示本交笼养种鸡日产蛋分布及蛋重变化规律,对400只本交笼养海兰褐父母代鸡进行连续7 d观测试验。结果显示:试验鸡群产蛋率维持在90%~100%;每日不同时间段种鸡产蛋比例存在差异(P<0.05),其中产蛋比例从4∶30~8∶00逐渐递增,并在8∶00达到峰值,之后呈逐渐下降趋势,且上午累积产蛋量显著高于下午(P<0.05)。拟合后发现,产蛋比例曲线呈偏态分布,并且更加符合多项式拟合函数,y P=97.40713-203.7699x+157.59383x~2-58.25682x~3+12.22482x~4-1.57116x~5+0.12624x~6-0.00619x~7+0.000169x~8-0.000002x~9,R=0.9751,x∈(1,17)。除个别时段蛋重较低外,其他时段蛋重变化差异不明显(P>0.05)。
In order to reveal the daily distribution of egg-laying breeders and the changes of egg weight, four hundred Hailin brown broodstocks were kept for 7 consecutive days. The results showed that the laying rate of the experimental flock maintained at 90% -100%, and the proportion of laying hens differed from day to day (P <0.05). The proportion of laying hens gradually increased from 4:30 to 8:00, And peaked at 8:00, followed by a gradual downward trend, with cumulative egg production in the morning significantly higher than in the afternoon (P <0.05). After fitting, it was found that the laying proportion curve was skewed distribution, and more in line with the polynomial fitting function, y P = 97.40713-203.7699x +157.59383x ~ 2-58.25682x ~ 3 +12.22482x ~ 4-1.57116x ~ 5 + 0.12624x ~ 6-0.00619x ~ 7 + 0.000169x ~ 8-0.000002x ~ 9, R = 0.9751, xε (1,17). No significant difference in egg weight was observed at other time points (P> 0.05) except for low egg weight in individual time periods.