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中山湿性常绿阔叶林是我国山地常绿阔叶林中一个重要而特殊的类型。云南哀牢山原生中生湿性常绿阔叶林的小凋落物量（叶、直径＜ ２．５ ｃｍ 枝、花果和杂物）为（６．７７±１．４３）ｔ／（ｈｍ ２·ａ），大枯枝（直径≥２．５ ｃｍ ）凋落量为（０．４５±０．１８） ｔ／（ｈｍ ２·ａ），凋落高峰发生在干季末期４～５ 月和初冬时１０～１１ 月。由倒木、枯立木和大枯枝等组成的粗死木质物在该类森林中的现存量达９８．４６ ｔ／ｈｍ ２，其中倒木占其总量的８５．８％ ，且它们在林内分布不均匀，增加了森林生态系统结构和生境的多样性。粗死木质物是森林中重要的养分库，其中的Ｃ、Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ、Ｍｎ、Ａｌ和Ｆｅ元素的总贮量达到４８６９９ ｔ／ｈｍ ２，每年通过凋落物方式积累于林地表的养分元素只占其总量的７．７７％
Zhongshan wet evergreen broad-leaved forest is an important and special type of evergreen broad-leaved forest in China. The litter size (leaf diameter, diameter <2.5 cm, flower and debris) in the primary Mesozoic evergreen broad-leaved forest in Yunnan Province was 6.77 ± 1.43 t / (hm 2 · The litterfall was (0.45 ± 0.18) t / (hm 2 · a) in litter (diameter≥2.5 cm). The peak litterfall occurred in April-May at the end of dry season and 10 ~ November. The amount of coarse dead wood, consisting of fallen wood, dead wood and big dead branches, is 98.46 t / hm 2 in this kind of forest, of which, the fallen wood accounts for 85.8% of the total, and they are distributed in the forest Unevenness increases the diversity of forest ecosystems structures and habitats. Crude dead wood is an important nutrient pool in the forest, in which the total reserves of C, N, P, K, Ca, Mg, Mn, Al and Fe reach 48699 t / hm 2, Forest surface nutrient elements only account for 7.77% of its total