浙江天童常绿阔叶林演替过程凋落物数量及分解动态  

DYNAMICS OF LITTER AMOUNT AND IT’S DECOMPOSITION IN DIFFERENT SUCCESSIONAL STAGES OF EVERGREEN BROAD LEAVED FOREST IN TIANTONG,ZHEJIANG PROVINCE

作　　者：张庆费[1,2] 宋永昌[1,2] 吴化前 由文辉 

机构地区：[1]上海市园林科学研究所 [2]华东师范大学环境科学系

出　　处：《植物生态学报》1999年第3期250-255,共6页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金

摘　　要：浙江天童常绿阔叶林演替过程森林凋落物量呈增长趋势，其中：乔木叶比例最大，其它器官组分在不同演替阶段的比例不一致，灌木叶和草本、树皮比例随着演替进程而呈减少趋势，树枝和繁殖器官则呈增大趋势。以分解袋法测得凋落物年失重率和指数方程模拟的分解系数Ｋ在演替过程中均呈增长趋势，这与年凋落物数量变化趋势相似。可见，随着演替进程，生物循环加快，群落自肥能力增强。The annual amount of litterfall of the succession stages of subtropical evergreen broadleaved forest in Tiantong,Zhejiang province increased as succession proceeded.Leaffall accounted the highest proportion of organic composition of the litterfall throughout the succession,and the proportions of other components varied among different stages.As succession proceeded,the proportions of shrub leaf and herb litter and barks decreased,while those of twigs and branches,flowers,and fruit increased.The decomposition order of litterfall by litterbag method and the decomposition coefficients from exponential decay model tended to increase in the course of succession,in which appeared the similar variation trend with annual litterfall amount.The results suggested that progressive succession can accelerate biological cycling,and promote the improvement of soil fertility.

关 键 词：中亚热带 常绿阔叶林 次生演替 凋落物 分解 

分 类 号：S718.541[农业科学—林学]