【摘要】 通过林分样地调查 ,采用收割法测定标准木各器官生物量 ,并建立生物量相对模型 ,利用模型和样地及树干解析资料 ,推算出青海云杉林生物量为 2 0 3.0 8t/ hm2 ,其中乔木层占 87.41 % ,下木层占 0 .6 1 % ,活地被物层为 0 .32 t/ hm2 ;并通过生物量各组分碳含量测定推算出青海云杉林贮存 CO2 1 2 1 9.2 3t/ hm2 ,其中土壤贮存占 6 9.6 1 % ,林分贮存占 30 .39% ;年净固定大气 CO2 9.85 t/ hm2 ,其中有 6 0 .6 1 %贮存在林分内 ,有 39.39%通过有机体凋落以枯落物及分解残留物等形式贮存在土壤内 ;森林土壤既是极为重要的碳“汇”,又是一个相当重要的碳“源”;由于长期封育保护 ,人为干扰减少 ,林分和土壤碳贮存呈增加趋势更多还原

【Abstract】 A relative biomass model was established by investigating stand samples, measuring the organ biomass of model trees. Using this model and the information of the tree trunk analysis, the biomass of Picea crassifolia forest was calculated to be 203.08 t·hm -2 ,in which arbor layer constiutes 87.41%, lower story of the forest 0.61%,living ground cover 11.98%. The annual net increment of biomass was 3.80 t·hm -2 ,in which arbor layer was 3.41 t·hm -2 ,lower story 0.07 t·hm -2 ,living ground cover 0.32 t·hm -2 . By measuring the carbon content in each component of biomass, the storage of CO 2 in Picea crassifolia forest was calculated to be 1 219.23 t·hm -2 , in which the soil reserved 69.61%,and stand 30.39 %. The annual net CO 2 fixation was 9.85 t·hm -2 , in which 60.61% was fixed in stand, 39.39% in soil. Forest soil not only was an important carbon reserve, but also a main source. The fixation of carbon in forest stand and the soil trend to increase in this region due to the decrease of human disturbance and long term mountain closing protection.更多还原