Abstract: Objective Logistic growth model and Gompertz growth model were applied in fitting ,comparison and analysis of early growth and development of Chinese Experimental Miniature Pig(CEMP),in order to find out appropriate growth curve model. Methods The body weight of closed colony in CEMP were measured every 7 days from the age of 1~6 weeks and every 14 days from the age of 8~26 weeks, then the fitting analysis of growth and development of closed colony of breeding pigs in early stage were carried on by Logistic growth model and Gompertz growth model. Results The results of Gompertz growth model were more closed to actual situation by comparison of Logistic growth mode. By Gompertz growth model,the estimated results of our closed colony were as follows:the maximum weight was 31.13 kg, growth spinod age in days was 101.31 d, growth spinod weight was 11.45 kg. The average daily gain was increased from 0.0343 kg/d(7 days) to the maximum value of 0.1603 kg/d(101.3 days), then gradually decreased, so the growth rate increased initially and decreased afterwards. Conclusion Appropriate growth curve model of breeding and feeding for closed colony of CEMP was established in our research, which makes referential and practical importance in improving methods of feeding and management and breeding,and so on.

Key words: Chinese Experimental Miniature Pig(CEMP), Growth curve, Logistic growth model, Gompertz growth model