Effect of Grazing Intensities on Primary Productivities and Nutrient Seasonal Dynamic of Deyeuxia angustifolia Meadow in Sanjiang Plain Effect of grazing intensity on ecological stoichiometry of Deyeuxia angustifolia and meadow soil Analysis of the process and impacts of Deyeuxia angustifolia Invasion on the Alpine Tundra, Changbai Mountain THE FRACTAL CHARACTER OF THE DISTRIBUTION PATTERN OF DEYEUXIA ANGUSTIFOLIA POPULATION I. Box Dimension. THE ABOVEGROUND BIOMASS DYNAMICS OF DEYEUXIA ANGUSTIFOLIA POPULATION IN TYPICALELL MEADOW ON SANJIANG PLAIN THE FRACTAL CHARACTER OF THE DISTRIBUTION PATTERN OF DEYEUXIA ANGUSTIFOLIA POPULATION Ⅱ. Information Dimension and Correlation Dimension STUDY ON SEASONAL DYNAMICS OF ABOVEGROUND BIOMASS AND GROWTH RATE OF DEYEUXIA ANGUSTIFOLIA POPULATION IN MARSH MEADOW ON SANJIANG PLAIN STUDY ON THE BIOMASS OF ABOVEGROUND ORGANS AND LAYER STRUCTURE OF DEYEUXIA ANGUSTIFOLIA IN TYPICAL MEADOW ON SANJIANG PLAIN Effects of simulated soil warming on the growth and physiological characters of Deyeuxia angustifolia. DYNAMICS OF HEIGHTS OF DEYEUXIA ANGUSTIFOLIA POPULATION Study on purification of nitrogen and phosphorous in Deyeuxia angustifolia simulated experiment in Sanjiang Plain,China