The biomasses of arbor layer account for 95.6%, 97.35%, 97.62%, 96.53%, 98.28% and 98.78% of their total community biomass. These results showedan increasing trend of biomass according to different stand ages.

• 乔木层生物量占群落总生物量的比例从10龄至65龄林间呈不断增加的趋势，分别为95.；6%25，97