关键词: 垫料, 工作状态, 物理特性

Abstract: Abstract: Objective To provide basic data on laboratory rodent bedding choice under working condition． Method The mouse cages were filled with the equal volumes ( 500 ml) of aspen shaving and corncob beddings in two particle size ( big or small) ，respectively． In the working condition complying with the National Standard GB 14925 － 2010，the mass and the physical properties of the three beddings，volumetric absorbency，evaporation rate，heat preservation，and dust particle production，were examined． Result The mass of aspen shaving was significantly lower ( P ＜ 0. 001) than those of the two corncob beddings． In contrast，corncob beddings had the significantly higher ( P ＜ 0. 001) absorbency when compared to aspen shaving bedding，and the absorbency of the small particle corncob was lower ( P ＜ 0. 001) than that of the big one． Evaporation rate was found faster ( P ＜ 0. 001) for aspen shaving than for the two corncob beddings，and there was no difference between the two corncob beddings． The aspen shaving generated significantly more ( P ＜ 0. 001) dust particles than the two corncob beddings． Conclusion The parameters of physical properties are correlated with the material and shape of the beddings． The advantage and disadvantage of each bedding should be fully estimated when a facility chooses bedding for laboratory rodent husbandry．

Key words: bedding, working condition, physical property