Researches on litterfall decomposition rates and model simulating of main species in various forest vegetations of Changbai Mountains,China
长白山各植被带主要树种凋落物分解速率及模型模拟的试验研究

litter decomposition rates of dominant tree species were determined using litterbag burying method in three altitudinal belts of the Broad-leaved Korean Pine forest, Spruce-fir forest and Ermans Birch forest in Changbai Mountain nature reserve during a period of three years from 2001 to 2003. Spatial and temporal dynamics and impact of litter quality were examined with a simulation model for understanding the trophic strategy of main species and ecosystem circulation of material and promoty ecosystem based forest management. The results indicated that annual mass loss increased over time, following a non-linear pattern. The leaf decomposition of all major tree species accelerated after 683 day(1.75year).By the end of study period(699 day), the remaining dry weight of buried leaves from 1ess to bigger was 24.56 for Asian White Birch(Betula platyphylla), 24.81% for Amur Linden(Tilia amurensis), 38.48% for Korean Pine(Pinus koraiensis), 41.15% for Yezo Spruce Cheng et L.K.Fu(Picea jezoensis var. microsperam), 41.53% for Ermans birch(Betula ermanii) and 42.62% for Khingan Fir(Abies nephrolepis). The decomposition rates of twigs were lower than those of leaves, and the remaining dry weight followed to order of AL(44.98%)