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 interannual and seasonal changes of litter flow in the evergreen broad-leaved forest in southern Helaiding Nature Reserve in Guangdong Province were analyzed. The results showed that the litter had obvious interannual and seasonal variations. The average litterfall energy flux was 9 36 3MJ · m -2 · a -1 in 4 years, litter leaves accounted for 81 95%, litter flow in 1994 was 7 357 MJ · M-2 · a-1, below the average of 21.4%. The main environmental factors influencing the formation of litter in evergreen broad-leaved forest in China are the interannual and seasonal changes of water conditions.