长江三角洲肉用白山羊与萨能奶山羊、波尔山羊杂交后代的生长发育规律研究

Growth and development law of crossbred from the Yangtze River Delta meat white goat × Saanen dairy goat and the Yangtze River Delta meat white goat × Boer goat

为探索长江三角洲肉用白山羊与萨能奶山羊、波尔山羊杂交羊的生长发育规律,以30只长江三角洲肉用白山羊杂交羔羊为研究对象,运用Logistic、Gompertz、Von Bertalanffy3种典型的非线性数学模型对其初生体重、1-12月龄的体重进行生长曲线模型的建立及拟合.结果表明:3种模型的曲线拟合度R2均在0.99以上,其中Gompertz模型R2 =0.999,高于Logistic模型与Von Bertalanffy模型,成熟体重为12.86 kg,拐点月龄为2.31月龄,最大日增重为146.03g.通过对3种模型的拟合参数进一步对比分析,并结合长江三角洲肉用白山羊杂交羊羔羊的实际生长情况,可知Gompertz模型的拟合效果较好.

In order to explore the growth and development law of crossbred from the Yangtze River delta meat white goat ×Saanen dairy goat and the Yangtze River delta meat white goat × Boer goat, 30 hybrid lambs for meat from the Yangtze river delta were studied. Using 3 nonlinear mathematical models ( Logitic, Gompertz, Von Bertalanffy), the growth curve model of its initial weight and weight from January to December was established and fitted, and model selection and growth curvs analysis were conducted. The results showed that the curves fitting degree R 2 of 3 models were all above 0.99, among them, the Gompertz model ( R 2 =0.999) fitted higher than the Logic model and the Von Bertalanffy model. The mature weight, spinodal age and maximum day gain were 12.86 kg, 2.31 months and 146. 83 g respectively. The further comparison and analysis of the three models’ fitting parameters and the actual growth of the crossbred showed that the Gompertz model had a better fitting effect.