[Objective] To evaluate drought resistance of seventeen Hippophae rhamnoides in Ulan Buh Desert in order to provide theoretical basis for the selection of drought resistant species.[Methods] Under different soil moisture conditions

subordinate function values analysis was used to evaluate drought resistance.[Results] (1) With the increasing of drought stress

water saturation deficit

boung water and bound/free water ratio

and cell membrane permeability increased. Water saturation deficit ranged from 22.88% to 64.85%

and maintained at the same high level in Qiuyisike

Ou 11 and Baiqiu. Boung water and bound/free water ratio showed a high level in Shenqiuhong and Ou11. The relative electric conductivity in Chengse and Baiqiu was significantly higher than that in the other varieties.(2) As the acceleration in drought stress

the content of chlorophyll

water-retaining capcity

photosynthetic rate

transpiration rate and stomatal conductance showed a decreasing trend. Yalishanda 12 had the highest content of chlorophyll. The rate of water loss in Chengse and Xiangyang was significantly higher than that in the other varieties. Photosynthetic and transpiration rate in Liaofu 1 and Shenqiuhong declined by a large margin

while the decline of stomatal conductance in Liaofu 1 and Shenqiuhong maintained at a moderate level.[Conclusion] The drought resistance of seventeen Hippophae rhamnoides showed as follows:Liaofu 1 >Ou 11 >Shenqiuhong >Zhuangyuanhuang >Zongqiu >Zhiwuyuan >Baiqiu >Xiboliyahongyun >Qiuyisike >Yalishanda 12 >Chengse >Gaijiasuo >Xiangyang >Juren >Wuhe >Katuni >Haibin.