草业学报2016，Vol.25Issue(9)：182-188,7.DOI:10.11686/cyxb2015404
西北寒旱地区湖羊及其杂交后代生长发育模型分析
Growth model prediction and trend analysis of Hu sheep and their hybrid progeny in the arid and cold area of northwest China
摘要
Abstract
In this study,the body weight of 215 Hu sheep and 60 Hu×(Dorper×Hu)hybrid lambs were meas-ured from 0 to 12 months’age under the condition of barn feeding.The growth process of lambs was matched by Compertz and Logistic models.The growth parameter and estimated value of the models were analyzed to e-valuate the hybrid effect of Hu×(Dorper×Hu)hybrid lambs.The results showed that the fitting degrees (R 2 ) of the two models were over 0.96.The fitting effect of the Gompertz model was better than that of the Logistic model.The day of growth inflection points of Hu sheep rams and ewes were 2.55 and 1.73 months,while the weights at inflection point were 17.00 kg and 13.14 kg respectively.The day of growth inflection point of Hu ×(Dorper×Hu)hybrid lambs was earlier than that of Hu sheep,and the weights at inflection point were 17.74 kg and 15.80 kg respectively.The cumulative growth pole of Hu × (Dorper × Hu)was significantly higher than that of Hu sheep (P <0.01).These results indicate that the growth speed of Hu×(Dorper×Hu) hybrid lambs is faster than Hu sheep in early stages and that hybrid effects are evident.关键词
湖羊/杜湖杂交/生长模型拟合/参数估计Key words
Hu sheep/Dow hybrid sheep/fitting growth model/parameter estimation引用本文复制引用
喇永富,席锐,李发弟,王维民,张小雪,李冲,刘婷,唐德富,李宝胜..西北寒旱地区湖羊及其杂交后代生长发育模型分析[J].草业学报,2016,25(9):182-188,7.基金项目
甘肃省科技支撑计划（144NKCC049），现代农业产业技术体系建设专项资金（CARS-39）和甘肃中天羊业股份有限公司研发项目（ZTYY-2013-005）资助。 （）
