中文摘要：

为了研究雪灾干扰对森林生态系统物质循环与能量流动的影响,利用大样袋网袋法对武夷山3种程度受灾的毛竹林样地中凋落物的分解进行了连续1a的观测研究。结果显示：毛竹凋落物的分解失重呈先快后慢的趋势,在夏季,不同样地毛竹凋落物分解速率随受灾程度的加重而显著加快,不同受灾样地秋冬两季凋落物分解速率没有显著差异,春季重度受灾竹林分解速率又显著快于中度与轻度受灾竹林。3种样地毛竹凋落物的分解动态符合Olson指数衰减模型,且分解系数k从大到小排序为：重度受灾样地、中度受灾样地、轻度受灾样地。不同受灾竹林凋落物的分解速率均与土壤温度、雪灾输入林地生物量呈显著正相关,与郁闭度呈显著负相关,与土壤湿度不相关。研究表明雪灾加快了森林生态系统的有机物质的分解。

英文摘要：

In January 2008,an extraordinarily serious snow storm occurred in southern China which had serious disturb-ance and destroy on structure and function of forest ecosystem. We used big litterbag method to study the dynamics of leaf litter decomposition in different damaged level bamboo forests in Wuyi Mountain over one year to learn the influences of snow storm on cycle of substance and energy flow. The result showed that mass loss rate was very quick at the begin-ning,and then slow down. Decomposition rate of leaf litter increased with the damaged level in summer,but there was no difference in autumn and winter. In spring,decomposition rate in heavy level sites become quicker than it in middle and low level sites again. Decomposition dynamics in the different damaged level bamboo forests is accord with Olson model,and leaf decomposition rates （k） followed to order is： heavy level,middle level,low level. The decomposition rate positively correlated with soil temperature,the aboveground biomass loss caused by the snow storm,but negatively correlated with the canopy closure significantly. It didn’t correlate with soil water content. Our findings indicated that snow storm might accelerate litter decomposition rate.