武夷山中亚热带常绿阔叶林凋落物量动态研究

Dynamics of Litterfall in the Mid-subtropical Evergreen Broad-leaved Forest

通过11年来对福建武夷山森林生态系统国家定位观测研究站常绿阔叶林凋落物量进行监测所积累的资料的分析,研究了这一地带性植被演替过程中凋落物量动态变化格局及组成特征,并分析了米槠林和甜槠林群落凋落叶的变化规律及其与凋落物总量的联系。结果表明:武夷山中亚热带常绿阔叶林平均年凋落物量为3879.45kg hm^-2,年际波动显著;凋落物的季节变化规律是夏季>冬季>秋季>春季,变化曲线为双峰形,夏季和冬季为两个峰值季;树枝、树叶、花果、树皮、碎屑等5个组成部分以落叶占比最大,年平均落叶量占凋落物总量的72.15%。

The data accumulated by monitoring the litterfall of evergreen broad-leaved forest in the Wuyishan Forest Ecosystem National Positioning Observation & Research Station in Fujian Province in the past 11 years were studied.The dynamic pattern & composition of litterfall during the zonal vegetation succession were discussed.The variation of litter in Castanopsis carlesii plantation & Castanopsis eyrei community & its relationship with the total amount of litter were analyzed.The average annual litterfall of the mid-subtropical evergreen broad-leaved forest in Wuyi Mountain is 3 879.45 kg·hm^-2, and the annual fluctuation is significant.The seasonal variation of annual litter is summer>winter>autumn>spring, the curve is bimodal, and summer & winter are two peak seasons;according to branches, leaves, flowers, fruit, bark & debris, it is divided into five parts.The deciduous leaves have the greatest advantage, and the annual average deciduous proportion of the total amount of litter is 72.15%.