Composition of Seed Plant Species and Flora Features in Different Areas of the Kumtag Desert of China THE VEGETATION CHARACTERISTICS IN THE INTRODUCTION AREA OF SAIGA TATARICA Ⅱ.structure of plant community and nutrition analysis of the main species Analysis on succession for composition of plant community and its meteorological condition in region around Qinghai Lake The Quantitative Analysis of the Relationship Between Chemical Composition of Grassland Plants at Xilin River Valley and Their TAXA and Habitats A PRELIMINARy STUDY 0N THE C0MP0SITI0N 0F PLANT POPULATI0NS IN SOUTHERN YUNNAN TR0PICAL FOREST