【摘要】 为了了解藏羊的生长发育规律,试验采用Logistic、Gompertz和Von Bertalanffy三种非线性模型对0～6月龄藏羊的体重和体尺进行生长曲线拟合与分析,并探讨初生与断乳期羔羊体质的关联性。结果表明:藏羊在0～6月龄时,不同性别间体重、体尺增长均无显著差异(P>0. 05); Von Bertalanffy模型对体重、体长和胸围的拟合度最高,Gompertz模型对体高的拟合效果最好;体重的时间拐点为1. 52月龄,体重的生长拐点为8. 98 kg;体长、体高、胸围的生长拐点为0. 23～0. 27月龄; 3月龄羔羊的体重与初生体重呈极显著正相关(P<0. 01),3月龄公羊体高与初生体高,以及3月龄母羊胸围与初生胸围均呈显著正相关(P<0. 05)。说明哺乳期是羔羊生长的关键时期,初生体质对断乳期体质具有显著影响。更多还原

【Abstract】 In this study,three nonlinear models,Logitic,Gompertz and Von Bertalanffy were used to fit and analyze the growth curve of body weight and body size of Tibetan sheep from the age of 0 to 6 months,correlations of body conditions between birth and weaning lamb were also analyzed. The results showed that there was no significant difference in body weight and body size growth between sexes( P> 0. 05). The Von Bertalanffy model had the best effects on fitting the growth curves of weight,body length and chest circumference,with highest goodness of fitting,while Gompertz model had the best effect on fitting the growth curve of height. The growth inflexion of body weight was 1. 52 months old and the growth inflection point of weight was 8. 98 kg,while the growth inflexions of body length,body height,chest circumference were ranging from 0. 23 to 0. 27 month old. The weight of the 3-month-old lamb was significantly positively correlated with the birth weight( P<0. 01),so as the height of the 3-month-old rams and the height of the newborn body,and the chest circumference of the 3-month-old ewes and the newborn chest circumference( P<0. 05). It indicates that lactation is very important for the growth of lambs,and the newborn body conditions has a significant influence on the weaning body conditions.更多还原