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在 35年生的油松人工林中设置 4块标准地 ,分别径阶选定样木 ,测定其生物量。结果表明 :35年生油松人工林每公顷林分总生物量为 76 87t。油松各器官生物量的分配有一定的规律 ,树干生物量占全株生物量的44 0 8%～ 6 4 95 % ,树枝占 18 31%～ 2 8 73% ,树叶占 9 2 %～ 12 94% ,根系占 10 85 %～ 16 38%。林木生物量与径阶有正相关关系 ,与 (D21 3H)有密切相关关系 ,其回归模式为LnW =aLn (D21 3H) +b。
In the 35-year-old Pinus tabulaeformis plantation, four standard plots were set up. The results showed that the total biomass per hectare of Pinus tabulaeformis plantation was 76 87 t. The distribution of biomass of various organs of Pinus tabulaeformis had some rules. The trunk biomass accounted for 44 0 8% ~ 64 95% of the whole plant biomass, 18 31% ~ 28 73% of the branches and 92% ~ 12 leaves 94%, roots accounted for 10 85% ~ 16 38%. The biomass of forest trees had a positive correlation with diameter order, and was closely related to (D21 3H). The regression model was LnW = aLn (D21 3H) + b.