In this paper,making Malus sieversii as research object,through studying photosynthetic physiology, osmoregulation substance and balance of active oxygen of Malus sieversii under three soil moisture treatments(soil relative water content 70-75%,50-55%,30-35%,respectively)and different treatment time,to discuss the effects of them under water stress and adaptive mechanism to water stress of Malus sieversii.The results were summarized as follows:
1. Under the normal soil moisture treatment(CK),L...