In order to study the relationship between early body weight,tibia length,and opening performance of Bashang Long-tail chickens and green-shell laying chickens,an optimal regression equation based on body weight,tibia length,and opening per-formance was established.A total of 200 one-day-old Bashang Long-tail chickens and green-shell laying chickens were randomly selected to determine the body weight at 5-week-old(X1),body weight at 6-week-old(X2),body weight at 7-week-old(X3),tibia length at 5-week-old(X4),tibia length at 6-week-old(X5),tibia length at 7-week-old(X6),age at first egg(Y1),body weight at first egg(Y2)and egg weight at the first(Y3).Correlation and regression analysis were carried out.The results showed as follows:the laying day age of green-shell laying chickens was significantly earlier than that of Bashang Long-tail chickens(p＜0.01),body weight at first egg and egg weight at the first of Bashang Long-tail chickens were significantly higher than those of green-shell laying chickens(p＜0.01).The body weight,tibia length,body weight at first egg and egg weight at the first of Bashang Long-tail chickens and green-shell laying chickens at 5-7 weeks of age were significantly positively correlated(p＜0.01)but were not significantly negatively correlated with laying day of age(p＞0.05).The optimal regression equations of Bashang Long-tail chickens and green-shell laying chickens are worked out.The results indicate that the opening performance of Bashang Long-tailed hens and green-shell laying hens can be predicted and evaluated by the growth character indexes.
关键词
坝上长尾鸡/绿壳蛋鸡/生长发育/开产性能/回归
Key words
Bashang Long-tail chicken/Green-shell chicken/growth and development/traits at the first egg/regression ana-lyse
维普
万方数据