Growth and Development Law and Growth Curve Fitting Analysis of Tarim Pigeon
To explore the early growth and development patterns of Tarim pigeons and understand their breed characteristics.The model of self reproduction and self rearing of parent pigeons was used to measure the body weight and various body size traits of 0～28 day old Roast squab,and the correlation analysis was carried out.Three nonlinear models,Logistic,Gompertz and Von Bertalanffy,were used to curve fit the body weight of 0～28 day old Roast squab.The cumulative weight of Tarim pigeons continued to increase,reaching its maximum value at 21 days of age,with a slight decrease in weight after 21 days of age.The relative growth rate continued to decrease with the increase of body weight.The absolute growth of Roast squab at the age of 7 days was the largest,and the weight at the age of 28 days was negative.The body weight of Roast squab at different ages was significantly positively correlated with various body size traits(P＜0.01).All three nonlinear models can simulate the growth curve of Tarim pigeons well,but the Gompertz model has the best fit(R2=0.988),with a turning point age of 7.541 days,a turning point weight of 139.57 g,and a maximum daily weight gain of 20.795 g,which is closest to the actual me-asured values.The early growth rate of Tarim pigeons is fast,and the growth curve is in an"S"shape,which conforms to the general rules of poultry growth and development.The Gompertz model has the best fitting effect on the weight gain during the growth and development of Tarim pigeons.Based on this model,a scientific feeding and management model can be formulated to maximize its production perform-ance and provide a basis for breed development and utilization.
tarim pigeonbody sizebody weightgrowth and development patternsgrowth curvecorrelation analysis
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