贡嘎山不同年龄结构峨眉冷杉林粗木质残体的贮存量及其特征

 粗木质残体（CWD）是森林生态系统中的重要组成部分,具有十分重要和独特的生态功能。通过对长江上游亚高山暗针叶林CWD贮存量与特征的调查,初步探讨了贡嘎山不同年龄结构峨眉冷杉林CWD的形成与来源,提出了按其组分和分解等级对CWD进行分类的方法。结果表明,贡嘎山峨眉冷杉过熟林、成熟林、中龄林,以及冬瓜杨与峨眉冷杉混交林内CWD贮存量分别为91.75、71.72、50.45和29.03t/hm2。

Storage Amount and Characteristics of Coarse Woody Debris in Abies fabri Forests in Different Age Stages at the Gongga Mountains

Coarse Woody Debris (CWD) is an important component in forest ecosystems and provides important and unique ecological functions. Based on investigation to the storage amount and characteristics of CWD in sub-alpine dark conifer forests at upper reaches of the Yangtze river, this paper discussed the formation and sources of CWD in Abies fabri (Omei fir) forests at different age stages, and put forward a method of CWD classification by its constituents and decomposition grades. The result shows that the storage amount of CWD in over-matured Omei fir forest, matured Omei fir forest, middle-age Omei fir forest and Omei-fir with poplar mixed forest were 91.75, 71.72, 50.45 and 29.03 t/hm² respectively.