油松人工林碳汇功能的研究

Studies on the Carbon-sink of Pinus tabulaeformis Plantation in Mulan Forest Farm

对木兰林管局油松人工林19块标准地分林木层、灌木层、草本植物层、枯落物层和土壤层进行了生物现存量的实测与碳储量的研究,结果表明林木层和土壤层的碳储量构成了林分碳储量的主体。分配次序为土壤层〉林木层〉地表枯落物层〉草本层〉根桩〉灌木层,林木层碳储量分配次序为干〉枝〉根〉叶。建立了林木蓄积与生物量、碳储量的回归模型,认为幂函数形式有较好的适用性。以林龄（A）和3株优势木平均高（H）建立了土壤有机碳密度（Soc）拟合方程,可用于具体小班土壤碳密度的估测。木兰林管局油松人工林林分碳密度为76.586 2-284.417 8 t/hm^2,平均值为143.1 t/hm^2,其中林木平均碳密度为30.454 5 t/hm^2,土壤平均碳密度为110.773 5t/hm^2;现有油松人工林碳储量估测结果为983 314.0 t,其中林木碳储量为208 923.0 t,占总碳储量的21.25%,土壤碳储量为760 881.0 t,占总碳储量的77.38%。

The biomass and carbon storage of the 19 sample plots of Pinus tabulaeformis plantation in Mulan forest farm were studied in this paper. The results showed that the carbon storage in the soil and in the arbor layer were the dominant in the plantation systems. The regression equations between forest stock and carbon storage were exponentially fitted and well adapted to the growth stock. The density of soil organic carbon in a specific forest spot could be estimated by the regression fitted by the stand ages and the average height of 3 dominant trees. The carbon density in the Pinus tabulaeformis plantations in this area was ranged from 76.586 2 to 284. 417 8 t/hm^2 , with an average of 143.1 t/hm^2, and in which the carbon density in the arbor layer and in the soil was 30. 454 5 t/hm^2 and 110. 773 5 t/hm^2 , respectively. Accordingly, total carbon storage of Pinus tabulaeformis plantation in Mulan forest farm was estimated as 983 314.0 t, in which it was 208 923.0 t and 760 881.0 t in the arbor layer and in the soil, respectively.