Correlation Analysis of Body Weight and Body Size Indexes and Growth Curve Fitting Analysis of Binglangjiang Buffalo Calves
In order to identify the body shape and appearance of 0-180 day old Binglang River buffalo and reveal its growth rule,43 healthy individuals were selected and their body weight and body size indexes were measured to determine the correlation between body weight and body size indexes.The Gompertz model(y=Ae-Be-kt)and Logistic model(y=A/(1+Be-kt))were employed to fit the growth curve to weight,body height,body diagonal length,chest circumference and tube circumference of bulls and cows.The results showed that body weight was positively correlated with body height,body diagonal length,chest girth and tube girth(P<0.01).R2 of the Gompertz and Logistic growth curves,body weight,body height,body oblique length,chest circumference and tube circumference all were greater than 0.964,and the Gompertz and Logistic growth curves showed that the chest circumference,body height and body oblique length of bulls and cows all displayed an increasing trend with age,while the tube circumference increased mildly.Males are slightly better than females in all indicators.In conclusion,the body weight of 0-180 day old Binglang River buffalo can well reflect the developmental changes of all body size indexes,and the changes can be predicted by Gompertz and Logistic growth curve models.
万方数据
维普
