Effects of nitrogen addition on soil respiration of Sibiraea angustata shrub in the eastern margin of Qinghai-Tibetan Plateau Effect of Grazing Interference on the Architecture of Sibiraea angustata in the Eastern Qinghai Tibetan Plateau The Community Types and Biomass of Sibiraea angustata Scrub and Their Relationship with Environmental Factors in Northwestern Sichuan Protective Effects of Liu Tea on CCl4Injured Liver and Its Working Mechanism Effect of polysaccharides in processed Sibiraea on immunologic function of immunosuppression mice Effects of snow cover on the decomposition and nutrient dynamics of Sibiraea angustata leaf litter in western Sichuan plateau, Southwest China. STUDIES ON THE CHEMICAL CONSTITUENTS OF SIBIRAEA ANGUSTATA Characteristic of Molecular Evolution of Sibiraea angustata Based on nrDNA ITS and cpDNA trnL-F Sequence Analysis