福清山羊(永泰类群)体重生长曲线拟合分析OA

In order to study the rule of weight growth of Fuqing goats(Yongtai group),the body weight data of 120 Fuqing goats(male and female half)at birth,3 months,6 months and 12 months of age were measured,and the weight growth curves were fitted by Von Bertalanffy,Gompertz and Logistic nonlinear growth models.The results showed as follows:(1)the birth weight,3-month weight,6-month weight and 12-month weight of Fuqing goats(Yongtai group)rams were 1.41 kg,7.60 kg,15.02 kg and 23.06 kg,respectively,and the corresponding ewes were 1.33 kg,7.43 kg,14.89 kg and 22.57 kg,respectively.The body weight of rams was higher than that of ewes in the whole experiment,but the body weight data of only 3 months of age showed significant difference(P＜0.05).(2)The three nonlinear growth curve models could well fit the body weight growth process of Fuqing goats(Yongtai Group),with R2 ranging from 0.949 to 0.963;The Gompertz model had the highest R2 for both male and female sheep and had the best fitting effect.The body weight growth curves of male and female Fuqing goats(Yongtai group)fitted by this model were Y=25.348*e-2.836*EXP(-0.283*t)and Y=24.603*e-2.887*EXP(-0.292*t),respectively.The turning point months of male and female goats were 3.68 months and 3.63 months,respective-ly.The inflection point weight is 9.33 kg and 9.05 kg.