Primary Study on Reproduction Strategies of Caragana roborovskyi in the Arid Desert Region Plant Diversity in the Process of Succession of Artificial Vegetation types and Environment in an Arid Desert Region of China Expansion strategies of Caragana stenophylla in the arid desert region Study on Soil Microbiotic Crust and Its Influences on Sand-fixing Vegetation in Arid Desert Region Succession pattern of artificial vegetation community and its ecological mechanism in an arid desert region The Techniques For Planting Lawn with Film-Bottomed Tillage and Water Saving Irrigation in sandy land of Arid Desert Region