| In January 2008, an extraordinarily serious snow storm occurred in southern China had serious disturbance 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 two years for understanding the influences of snow storm on cycle of matter and energy flow. The result showed that:(1)Bamboo forest mass loss rate firstly was very quick, then slow down, and leaf decomposition rates followed to order of heavy level>middle level>low level, it increased with the damaged level significantly.(2)Decomposition dynamics in the different damaged level bamboo forests was accord with Olson model, and the order of leaf decomposition rates (k) was accord with the order of leaf decomposition rates.(3)The decomposition rate positively correlated with soil temperature,the aboveground biomass loss caused by the snow storm and the damaged level, but negatively correlated with the canopy closure significantly. It did not correlated with soil moisture.(4)The release rates of C,N,P,K in heavy level>middle level>low level, and C,N,K release rates in heavy level sites was significant faster than that in middle and low level sites, but there was no significant difference of P release rate among different damaged level sites. leaf litter remaining positively correlated with C,N,P,K remaining.(5)All over the decomposition process, the leaf litter decomposition rates and nutrient release rates of below leaf litter were quicker than that of above leaf. There gradually appeared significant differences of leaf litter decomposition rates and C release rates between above leaf litter and below leaf litter in middle level sites and low level sites with time, but there were no significant differences between above leaf litter and below leaf litter in heavy level sites in the whole decomposition periods.
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