无角陶赛特羔羊和波德代羔羊的生长发育模型

采用Mitschetrlich模型、Gompertz模型、Logistic模型拟合了无角陶赛特羔羊和波德代羔羊的早期生长发育过程.结果表明:3种模型的拟合度均在0.98以上,拟合效果好,其中Gompertz模型在拟合度和预测体重效果方面最好.因此,采用Gompertz模型进一步估算了2品种公、母羔的拐点体重、拐点日龄、瞬时相对生长率(K)、相对生长率(RGR)、瞬时生长率(GR),结果表明:无角陶赛特羔羊早期生长发育强于波德代羔羊,且2品种公羔生长发育较母羔快.

Study on growth fitness models of the lambs of Poll Dorset and Borderdale

The early growth process of lambs from 0 to 8 month old Poll Dorset and Borderdale was studied by fitting of Mitschetrlich,Gompertz and Logistic models.The results showed that all the fitnesses(R~(2)) of three models were above 0.98,among which the Gompertz model had both highest R~(2)value and best prediction effectiveness of body weight.The parameters of maximum body weight,inflection age,body weight at inflection age,instantaneous relative growth rate(K),relative growth rate(RGR) and instananeous growth rate(GR)were estimated with Gompertz model,as the results,the growth of male lamb was more rapid than that of female,while the early growth of Poll Dorset was higher than that of Borderdale.