Photosynthetic characteristics of three different life-form plants in the desert-oasis ecotone of Keriya River Basin

Vegetation plays an important role in preventing wind erosion, sand fixation, water conservation and ecosystem restoration in oasis ecosystem. For the photosynthetic characteristics could fairly reflect the adaptation of plants to their habitat, gas exchange parameters and environmental factors of three different life-form plants which grown in the desert-oasis ecotone of Kenya River Basin were measured. By comparing the photosynthetic characteristics of Phragrmites australis, Tamarix ramosissima, Populus euphratica and their relationship with environmental factors, adaptive capacities and mechanisms of the three different life-form plants were discussed. The main factors which affected physiological process of photosynthesis are different among the three different life-form plants, but the relationship between T[subr], and P[subn] is closer than other factors.