Response of seed germination of three xeromorphic shrubs to drought stress Sap-flow Pattern and its Responses of Hedysarum scoparium Fisch.et Mey.to Environmental Factors Stratified Adaptive Cluster Sampling Based on the Adjusted Horvitz-Thompson Estimator with the Network Nonoverlapping Strata 沙漠植物的更新生态位Ⅰ.油篙、柠条、花棒的种子萌发条件的研究 Effect of sand burial depth on seedling emergence and growth of Hedysarum scoparium Tree-scale transpiration dynamics of Hedysarum scoparium in response to growth stage, groundwater table depth, and climate in a semi-arid environment in northwestern China Response of Antioxidation Protection System of Hedysarum scoparium to Drought Stress Effect of Fields Radiation on Callus Inductivity and Differentiation of Hedysarum scoparium Fisch.et Mey. Investigation on the Parasitoids of Orgyia ericae