湖北黑头羊生长曲线的拟合与分析  

Analysis and Fitting of Growth Curve for Hubei Black-head Goats

作　　者：张年[1] 陈明新[1] 

机构地区：[1]湖北省农业科学院畜牧兽医研究所,动物胚胎工程及分子育种湖北省重点实验室,湖北武汉430064

出　　处：《中国畜牧杂志》2014年第3期18-21,共4页Chinese Journal of Animal Science

基　　金：动物胚胎工程及分子育种湖北省重点实验室专项(2012ZD110);湖北省农业科技创新中心资助项目(2007-620-004-003)

摘　　要：采用Gompertz、Logistic和VonBertalanffy3种模型进行生长曲线拟合，对所选育的0～24月龄湖北黑头羊体重生长规律进行研究。结果表明：3种生长曲线模型对湖北黑头羊均能较好的拟合（R^2〉0．99），其中Gompertz模型对公羊拟合最佳（R^2=0．99932），拐点月龄和拐点体重分别为6．21月龄和20．823kg，Bertalanffy模型对母羊拟合最佳（R^2=0．99812），拐点月龄和拐点体重分别为4．17月龄和13．221kg；各月龄公羊体重显著高于母羊，绝对生长高峰公羊出现在6～8月龄，母羊出现在3～6月龄，与生长模型拟合结果吻合；相对生长率呈现一致趋势，初生至3月龄时的生长强度最大．后期生长强度明显不如前期．整条曲线大致上呈下降趋势，表明羔羊的生长强度随着月龄的增加而逐渐减慢。本研究结果可为及时掌握湖北黑头羊生长发育规律提供参考。In order to study the body weight growth law of breeding Hubei black-head goats, the growth curve were fitted by three nonlinear models （Gompertz, Logistic and Von Bertalanffy） from 0 to 24 months. The results indicated that three growth curve models had a good fitting with Hubei black-head goats （R2〉0.99）. Gompertz model was the best fitting for rams （R2=0.999 32）, which the growth turning points was 20.823 kg of body weight at the age of 6.21 months, and Von Bertalanffy model was the best fitting for ewes （R2=0.998 12）, which the growth turning points was 13.221 kg of body weight at the age of 4.17 months. Body weight of Hubei black-head goat rams was significantly higher than that of ewes, the absolute growth peak of rams in 6-8 months, ewes appeared in 3-6 months, and growth model fitting results. Relative growth rate showed a trend of consistent, 0-3 months to reach the absolute growth peak, in the late growth intensity is obviously than previous, the whole curve is generally a downward trend, showed that the growth intensity of the lamb with the months increase the intensity of growth gradually slowed down. The research provided a reference for the growth developmental law of Hubei black-head goats.

关 键 词：体重 生长曲线 模型 湖北黑头羊 

分 类 号：S827.3[农业科学—畜牧学]