A large part of dead body of Aneurolepidium chinense existed as standing and it shares up to 75.34% of total dead matter's weight in a year in Songnen grassland.The seasonal decomposition rates of standing dead litter and litter were similar.Both of them took parabolic type.The decomposition rate of litter was greater than that of standing dead litter in every month.The least values of their decomposition rates were both in October and the greatest value of decomposition of standing dead litter was in J...