THE ESTABLISHMENT AND PREDICTION OF THE DYNAMIC VARIATION MODEL OF WOOD GROWTH RING DENSITY FOR THE PLANTATION FOREST OF PINUS KORAIENSIS Analysis on grassland degradation in Qinghai Lake Basin during 2000-2010 A Study on Dynamic Variation of Saikosaponin Contents Dynamics of Nutritional Contents of Subtrib. Desmodiinae During Growth Period Study on the Seasonal Dynamic of Net Ecosystem Exchange over a Poplar Plantation of Yueyang City in Hu’nan Province Dynamics of the captured quantity of particulate matter by plant leaves under typical weather conditions Study on the Photosynthetic Dynamic Variation of Phyllostachys edulis Dynamic variation of biomass and content of polysaccharide and alkaloid in protocorm like bodies from Dendrobium officinale at different light intensities and incubation time Nitrogen content variation in litters of Deyeuxia angustifolia and Carex lasiocarpa in Sanjing plain Study on the Transpiration Dynamic Variation of Phyllostachys edulis’Pachyloen’ Dynamic variation of biomass and content of polysaccharide and alkaloid in protocorm like bodies from Dendrobium officinale at different light intensities and incubation time Studies on distribution and accumulative dynamic variation of bioactive components in Eucommia ulmoides Dynamic analysis of PM2.5 concentrations in urban forests in beijing for various weather conditions Isolation and enzymatic characteristics of cellulase producing microbial community Study on the Tran spira tion Dynam ic Var ia tion of Phyllostachys edu lis