Study on the growth and development regularity of some digestive organs in Shendan NO 6 green shell layer
In order to investigate the growth and development regularity of some digestive organs in Shendan NO.6 green shell layer,the weight of gizzard and glandular stomach at 1～60 weeks were measured.Logistic,Gompertz and Von Bertalanffy models were used to fit the weight of gizzard and glandular stomach.The results showed that the most suitable model for gizzard was the Logistic,the fitting degree(R2)was 0.969,the inflection point weight,inflection point week age and maximum weekly gain were 8.85 g,6.86 weeks and 1.99 g,respectively.The most suitable model for the glandular stomach was the Von Bertalanffy,the fitting degree(R2)was 0.949,the inflection point weight,inflection point week age,and maximum weekly gain were 1.69 g,5.19 weeks and 0.25 g,respectively,the correlation coefficients between body weight and gizzard and glandular stomach were 0.813(P＜0.01)and 0.868(P＜0.01).The growth and development of gizzard and glandular stomach of Shendan NO.6 green shell layer were earlier than body weight,the changes in body weight could appropriately reflect the changes in gizzard and glandular stomach.
Shendan NO.6 green shell layerdigestive organsgrowthdevelopmentfitting
万方数据
维普
