贡嘎山东坡峨眉冷杉林在湿季内每月每公顷约产生 69～ 89kg凋落物 .峨眉冷杉林的顺向演替能增加苔藓与枯落物的贮量并促进它的发育 ,峨眉冷杉林不同演替阶段的林分中凋落物的成分所占总量的比例有差异 ,苔藓层及枯落物L亚层、F亚层和H亚层含量与比例也不同 .贡嘎山东坡峨眉冷杉林内地表地被物的一次性最大持水量可达3 .93mm ,即使有效持水量也可以达到 3 .2 3mm .随峨眉冷杉林演替的发展 ,林内地被物调节水量的作用逐渐增加 The Abies fabri forests on the eastern slope of Mt. Gongga produced 69-89 kg of litter per hectare per month in the wet season.The forward succession of Abies fabri forest increased the reserves of moss and litter and promoted its development. There were differences in the proportion of litter in the total forest litter in different succession stages, and the contents and proportions of L sublayers, F sublayers and H sublayers of moss layer and litter were also different. The maximum water holding capacity of surface litter in Cunninghamia lanceolata is up to 3.93 mm, even though the effective water holding capacity can reach 3.23 mm. With the development of succession of Abies surimia, the effect of ground cover on water content gradually increases