人工养殖条件下鸿雁生长发育规律的研究

Study on the growth development law of Anser cygnoides within artificial culture

为了研究鸿雁的生长发育规律,试验采用Logistic和Gompertz 2种非线性模型对鸿雁体重变化规律进行拟合。结果表明,Logistic和Gompertz模型均能较好地拟合鸿雁的生长规律,其拟合度均在99%以上。鸿雁的生长快速区间为30~70日龄,其中52日龄左右生长速度最快,可达95.6 g/d。鸿雁在0~30日龄相对生长率最大,在30~70日龄,体重绝对生长最快,因此,鸿雁在0~70日龄应强化饲养管理、提供充足营养,避免疾病、饲养管理变动等不良因素干扰,确保鸿雁快速的生长发育。而70日龄以后,生长强度和绝对生长均逐渐降低,这时可逐渐降低日粮营养水平,饲养管理相对粗放。

To explore the growth law of Anser cygnoides, two nonlinear curve models of Logistic and Gompertz were used to fit the change of A. cygnoides weight in the test. The results indicated that two model fit the growth of A. cygnoides（R20.99）. The time interval of rapid growth was 30~70 days, the time of growth fastest was 52 day, weight increased at 95.6 g/d.The relative growth rate of 0~30 days and the weight accumulated growth of 30~70 days were bigger than other days. So, the rich nutrition and refined management were offered for A. cygnoides in 0~70 days in order to ensure rapid growth. After 70 days, with weight accumulated growth and relative growth rate be reduced, the nutrition level of diet reduced gradually and the feeding and management change were extensive.