Effects of Population Dentisy on Morphological Characteristics of Epimedium sagittatum in Different Growth Periods Density Regulation of the Clonal Growth of New Shoots in the Giant Bamboo Phyllostachys pubescens in Subtropical China An Analysis of Seasonal Variation of Vegetative Propagation and the Relationships Between Biomass and Population Density of Aneurolepidium chinense in Songnen Plain of China Density dependence of Phalaris aruandinacea clonal population on middle mountain region of subtropical zone of China A SELF-ADAPTIVE MODEL OF POPULATION GROWTH AND ITS PARAMETER ESTIMATION DETECTING EFFECT OF PHYLOGENETIC DIVERSITY ON SEEDLING MORTALITY IN AN EVERGREEN BROAD-LEAVED FOREST IN CHINA ON INFLUENCES OF POPULATION DENSITY OF PLANTAGO VIRGINICA ON ITS MORPHOLOGICAL CHARACTERS STUDY ON SPECIFICITIES OF THE DENSITY DEPENDENCE TO NATURAL CHLORIS VIRGATA POPULATION OF ALKALIZATION MEADOW IN THE SONGNEN PLAIN OF CHINA