关键词: 达乌尔鼠兔, 黑线仓鼠, 莫氏田鼠, 狭颅田鼠, 身体组成成分, 生物量热值, 生理年龄指标

Abstract: Studies on body components and energy value of four species of small rodents Mouse-hares (Ochotona daurica), Striped hamster (Cricetulus barbensis)． Maximowiczi's vole (Microtus maximowiczii) and Narrow-skulled vole (Microtus gregalis)were
carried out in Silin River Basin，Inner-Mongolia． Differences in different age groups and feeding habits or metabolic patterns in different species are stated in this paper． Along with the growth periods， increases of different body components are out of balance．It seems to be of some specific character． The growth indexes including physiological age index，caloric value in biomass，ratios between calcium and phosphorus and calcium and magnesium have their own variation ranges． Significant differences of body components have also been found between different sexes in the same species．
Food habit influence some indices of some components．Moreover,the two voles of the subfamily Microtinae have the similar value of many cornponents that shows the systematic significance.

Key words: Ochotona dauriea, Striped hamster, Maximowiezi's vole, Microtus gregalis, Gross body composition, Caloric value in biomass, Index of physiological age