Abstract: The characteristics of the contents of Mn, Cu and Zn, which are essential trace elements for plants, of the tissues in the plant species of an Aneurolepidium chinense grassland(hayfield)was studied. We obtained the following results:(1) The element contents in all the organs of A. chinense changed greatly in the growing season. Significant variations were found among different organs in the concentrations of the tested elements. In general, the following overall trend was very obvious as far as the element concentrations were concerned, i. e., root>rhizome>stem>ear except for Zn, the concentration of which was higher in leaves than in stems. The concentrations of Mn, Cu and Zn in the roots of other species in the community were also higher than in the aboveground parts.(2) S-shaped curves could be used to describe the seasonal dynamics of the concentrations of Mn,Cu and Zn in the aboveground parts of A. chinense, though the peak concentrations of different elements did not occur simultaneously. The dynamics of Mn, Cu and Zn in the aboveground parts of Carex duriuscula and Heleocharis acicularis could roughly be expressed by using a double-peaked curve that resembled the seasonal dynamics of their biomass.(3) The distribution of these elements in different organs followed an order of root>>stem>leaf>ear. This trend could be applicable to the biomass. The ratios of Mn and Cu accumulated in different aboveground organs to the total amount accumulated in the entire plant were lower than those of the biomass. The ratio of Zn in aboveground organs to the total plant was roughly the same as biomass.(4) The ratios of Mn, Cu and Zn accumulated in the community to the total reserves of the soil were 0.10% 0.33% and 0.09% respectively.