坝上长尾鸡育雏期生长发育规律研究

Studies on Growth and Development of Bashang Long-Tail Chicken in Brood Stage

选取787只坝上长尾鸡(公鸡379只,母鸡408只)对育雏期雏鸡的外貌变化和不同羽色雏鸡生长发育规律进行了分析。结果表明,到育雏结束雏鸡外貌有明显变化,性别对黑羽、麻羽、芦花、白花、银灰坝上长尾鸡初生重没有影响,白羽公鸡初生重显著大于母鸡(P<0.05),不同羽色公鸡之间,母鸡之间初生重差异不显著(P>0.05),坝上长尾鸡公、母鸡在2周龄之前增重缓慢,之后公鸡则明显高于母鸡,且保持较长时间的快速生长状态,随着周龄的增加,白羽公鸡与母鸡体重差异变大,黑羽、麻羽、白花公鸡与母鸡体重出现差异,2周龄白羽公鸡体重显著大于黑色公鸡(P<0.05),不同羽色母鸡之间出现差异。育雏期绝对生长曲线呈上升趋势,相对生长曲线呈下降趋势。

787 Bashang long-tail chickens including 379 cocks and 408 hens were chosen to study the growthand development in brood stage. The results indicated that with the growth of the chickens their appearancechanged gradually. Males and females of Bashang long-tail chickens with black, hemp feathers, reed catkins, whiteflower, and silver grey feathers have the similar birth weight. The birth weight of roosters with white feathers was sig-nificant higher than that of hens. The birth weight of chickens had no significant difference among roosters or henswith different feather color. Their weight increased slowly before 2 weeks old, and then, the males got a highergrowth rate than the females. With the growth of the chickens the difference of body weight between roosters andhens with white feathers become larger, the difference of body weight between roosters and hens with black, hempfeathers, and white flower feathers appeared. The body weight of roosters with white feathers was significant higherthan that of black at 2 weeks old. The body weight of hens with different feathers was different. The absolute growthcurve was on the rise and the relative growth curve was on the decline.