为研究德州驴的生长发育规律，选择200头德州驴（公、母驴各100头），分别于0、3、6、12、24月龄进行体质量、体高、体长、胸围、管围的测定，并采用Bertalanffy、Gompertz和Logistic 3种非线性模型对其生长曲线进行拟合分析。结果显示，3种模型均能较好地拟合德州驴的生长曲线（R²＜0.850），其中Bertalanffy模型对体质量、体高、体长、胸围的拟合效果最佳（R²＞0.910），与实测值最接近。Bertalanffy模型预测的公、母驴成熟体质量分别为248.51 kg、221.60 kg，拐点体质量分别为73.63 kg、65.66 kg，拐点月龄分别为2.43、1.95。

To study the growth development law of Dezhou donkey,200 donkeys(100 males and 100 females) were selected randomly. Their body weight,height at withers,body length,heart girth and cannon circumference were measured at the age of 0,3,6,12,24 months,respectively.Then their growth curves were fitted by Betalanffy,Gompertz and Logistic non-linear models,respectively.The results showed that all the three models could fit the growth curves of body weight and body sizes of Dezhou donkey effectively(R²<0.850).Among them,the Bertalanffy model had the best fitting effect on body weight,height at withers,body length,heart girth(R²>0.910),and the fitting results were nearest to the measured values.Through the Bertalanffy model,the predicted mature weights of male and female donkeys were 248.51 kg and 221.60 kg,respectively; the predicted inflexion weights were 73.63 kg and 65.66 kg,respectively;the predicted inflexion month ages were 2.43 and 1.95,respectively.