广东黑石顶自然保护区南亚热带常绿阔叶林凋落物能流的研究  

The Energy Flow Through the Litterfall of the South Subtropical Evergreen Broad-leaved Forest in Heishiding Nature Reserve

作　　者：侯庸[1] 王桂青[1] 王伯荪[2] 张宏达[2] 李鸣光[2] 

机构地区：[1]河北大学生物系,保定071002 [2]中山大学生命科学学院,广州510275

出　　处：《生态科学》2000年第2期7-11,共5页Ecological Science

基　　金：国家自然科学基金资助项目!(392 70 144 )

摘　　要：分析了广东省黑石顶自然保护区南亚热带常绿阔叶林凋落物能流的年际变化和季节变化。结果表明凋落物有明显的年际和季节变化 ,4年间平均凋落物能流为 9 36 3MJ·m- 2 ·a- 1 ,其中凋落叶占 81 95% ,1994年凋落物能流为 7 357MJ·m- 2 ·a- 1 ,低于平均值 2 1 4 %。说明了影响我国常绿阔叶林凋落物形成的主要环境因素是水分条件的年际和季节变化。The energy flow through litterfall in different period over 4 years was researched.The results indicated the existence of obvious yearly and seasonal fluctuation of the energy flow through litterfall.The mean energy flow of litterfall over 4 years was 9 363 MJ·m -2 ·a -1 ,in which the energy flow coming from leaf litter accounted for 81 95% of the total.In 1994,the energy alow decreased to 7 357 MJ·m -2 ·a -1 ,being lower the 4 years mean by 21 4%.The cause of leaf falling is largely attributed to water insufficiency or drougyt during the growing season.The role of low temperature is much less than of drougyt in the leaf falling of the evergreen broad leaved forest in China.

关 键 词：南亚热带常绿阔叶林 凋落物 能流 时间动态 

分 类 号：S718.554.1[农业科学—林学] S718.556