华北落叶松人工林生物量分配格局

Allocation pattern of Larix principis rupprechtii biomass

采用相对生长模型W=a(D2H)b对不同林龄华北落叶松人工林生物量进行了研究。结果显示,随着林龄的增大,树干的生物量增长的速度最快,树皮、树枝和树叶的生物量所占全株的比例随着林龄的增大而减小;6 a生林中,乔木层各器官生物量分配规律为树枝>树干>树皮>树叶>树根;12 a生林2、2 a生林和32 a生林中,分配规律为树干>树枝>树根>树皮>树叶;灌木层和草本层所占比例随着林龄的增大而减小,由6 a生林的9.28%和15.72%减小到0.46%。

Using the relative growth model W= a（D2H）b for biomass of Larix principis rupprechtii in different age were studied in this paper. The results show, With the increasing of forest age, the biomass of the tnmk are the fastest growing, but the percentage of bark, branches and leaves in the whole plant biomass ratio decreases as increasing of the forest age; in the 6- year forest, Biomass allocation pattern of the organ in every layer is branches 〉tnmk 〉 bark 〉 leaves 〉 roots; in the 12, 22,32 years forest, Allocation pattern is tnmk 〉 branches 〉 roots 〉 bark 〉 leaves; the percentage of the shrub layer and the herb layer decreases as increasing of the forest age,from 9.28% and 15.72% reduced to 0.46% respectively in the 6 years forest.