Growth and development rules and growth curve fitting analysis of Baicheng County Fried Chicken with different feather lines
[Objective]The experiment aims to understand the growth and development rules of Baicheng County Fried Chicken with different feather,namely black hemp feather,yellow feather,and silvery grey feather,and provide theoretical basis for scientific feeding management and breeding improvement of Baicheng County Fried Chicken.[Methods]200 healthy chicks(half males and half females)of each feather color were selected at the age of 0 days,and their body weight was measured and recorded from 0 to 22 weeks old.Logistic,Gompertz,and Von Bertalanffy growth models were used to fit and analyze the growth curve of male and female Baicheng County Fried Chickens.[Results]At 10 and 14 weeks old,the body weight of male Black hemp feather Baicheng County Fried Chicken was significantly higher than that of male Silvery grey feather Baicheng County Fried Chicken(P<0.05).At 12 weeks old,the body weight of male black hemp feather Baicheng County Fried Chicken was significantly higher than that of male Yellow feather and silvery grey feather Baicheng County Fried Chicken(P<0.05);at 16 weeks old,the body weight of male black hemp feather and yellow feather Baicheng County Fried Chicken was extremely significantly higher than that of male silvery grey feather Baicheng County Fried Chicken(P<0.01),and at 20 and 22 weeks old,the body weight of male black hemp feather and yellow feather Baicheng County Fried Chicken was significantly higher than that of male silvery grey feather Baicheng County Fried Chicken(P<0.05).For female Baicheng County Fried Chicken,the birth weight of yellow feather was significantly or extremely significant higher than that of black hemp feather and silvery grey feather(P<0.05 or P<0.01);at 6 and 8 weeks old,the body weight of female black hemp feather Baicheng County Fried Chicken was significantly higher than that of female silvery grey feather Baicheng County Fried Chicken(P<0.05),and at 20 and 22 weeks old,the body weight of fe-male Yellow feather Baicheng County Fried Chicken was significantly higher than that of female Silvery grey feather Baicheng County Fried Chicken(P<0.05).The growth curve of the three feather colors of Baicheng County Fried Chicken showed an"S"shape,and the growth peak of male chickens was reached at the 10th week,while that of female chickens was reached at the 12th week.The fitting curves of the three growth mod-els were basically consistent with the actual curves,and Von Bertalanffy model had the best fitting effect for both male and female chickens(R2>0.998).The inflection points of black hemp feather,Yellow feather,and silvery grey feather Baicheng County Fried Chickens were 8.629,9.389,and 8.947 weeks respectively for male chickens,and 7.946,8.619,and 7.936 weeks respectively for female chickens;the inflection points of weight were 858.207,911.107,and 842.681 g for male chickens,and 635.543,679.577,and 609.097 g for female chickens.[Conclusion]In conclusion,there are differences in growth and development among Baicheng County Fried Chickens with different feather colors.The optimal growth models for male and female Baicheng County Fried Chickens of the three feather colors are all Von Bertalanffy models.
Baicheng County Fried Chickengrowth regularitygrowth curvefitting curvegrowth model
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