Cultivation of introduced alfalfa varieties in an arid area of Minqin county Responses of vegetations in Minqin desert area to climate change. Relationship between frequency of sandstorms and air humidity as well as plant phenology: a case study from the Minqin desert area Phenological Characteristics of Desert Plant in Minqin Desert Area Stability and Ecological Effect of Mainly Plant Communities in Minqin Desert Area A RELATIONSHIP BETWEEN PHYSIOLOGICAL CHARACTERISTICS OF SOME FRUIT TREES AND SOIL WATER CONTENTS IN MINQIN DESERT AREA Response of grassland vegetation to climate warming in the Minqin area