Abstract: This paper dealed with the seasonal dynamics of vertical structures of stem, leaf and ear biomass and the layer structure of Deyeuxia angustifolia population which is the dominant species in typical meadow on Sanjjang Plain, meanwhile discussed the spatial pattern and sea-sonal dynamics of biomass of C/F andlayers of the population.

Key words: i>Deyeuxia angustifolia population, Aboveground organs, Layer structure, Aboveground biomass, Biomass dynamics