Abstract: The wilting coefficients and the survival days of turfgrass (Poa pratensis) and 6 main weeds (Viola prionantha,Digitaria ischaemum,Geranium sibiricum,Potentilla anserine,Inula britanica and Potentilla supina) in the temperate semi-arid region were measured under drought stress and the drought-resistances were compared according to the soil water depleted index (SWDI).The results showed that the wilting coefficient of Digitaria ischaemum was the lowest,then Poa pratensi the second,and that of Inula britanica was the highest.The wilting coefficients of Poa pratensis,Digitaria ischaemum were remarkably different from that of Inula britanica and Geranium sibiricum.The physiological drought-resistances of the seven species were in the order of Poa pratensis> Digitaria ischaemum> Potentilla supina> Potentilla anserina> Viola prionantha> Geranium sibiricum> Inula britanica.

Key words: Clethrionomys rufocanus, Activity rhythm