Abstract:

Regard natural mixed stand of coniferous and broadleaved trees as the research object，all the litter in different cutting operation sites after ten years（low intensity，middle intensity，high intensity，over high intensity） was collected，sampled and chemically．The results showed that biomass of forest litter and total nutrient contents generally reduced with the cutting intensity increasing．Biomass of forest litter and total nutrient contents in high and overhigh intensity selective cutting site after ten years were not recovered after ten years，but which in low and middle intensity selective cutting site were close to non cutting．It showed that low and middle intensity selective cutting were basically recovered after ten years．

Key words: natural mixed stand of coniferous and broad leaved trees, selective cutting, biomass of forest litter, nutrient content