关键词: 褐家鼠, 生长, 发育, 肥满度

Abstract: This paper studies the growth and development of Norway rat from birth to 100 days of age. Observations were made on its behaviour and sexual development. According to the analysis and calculation, the relationship between the body weight of Norway rat and the time was rectilinear positive interrelation, and the rectilinear formula was W=6.855+1.135t(r =0.9930 t_0.01); the relationship between the length of body and the days of age was index interrelation,the index formula was:L=44.12+112.7725e^-11.1153/t,the relationship between the length of tail, hind foot, ear and their days of age were index interrelation,the index formula were:M=14.92+111.0189e^-13.0586/t,F=8.39+28.6915e^-10.5778/t,E=1.58+16.5813e^-8.8681/t. As the age increased,the relative fatness (Kwl) value of Norway rat was raised. The relative fatness value was higher in autumn than in winter in the field.