Reviews on Water Physiological Characters of Shrubs on Sandy Land

The water physiological characters of shrub grown on sandy land and research on them were reviewed.The research on drought-tolerance evaluation index of psammophytes has developed toward physiological and physiological and biochemica1 character from morphological and anatomical characters. The results of research showed that whatever in the morphology and anatomy or in the water physiology and biochemistry such as water potential and transpiration, the shrubs grown on sandy land possessed the characters adapted to drought areas and could reach the destination of avoiding dry conditions by many approaches. The traditional theories and methodology are still being used widely. SPAC theory was the foundation of quantitative study in water transportation and energy transition. The dynamic study and simulation methods on various scales based on the theory have been applied in arid zone.