• 关键词：东北典型林区  黑碳分布  林型  地形  火烧强度  影响因素

• 基金项目：国家重点研发计划（No.2016YFA0600803）；国家自然科学基金（No.41330530）

• 孙金兵
• 东北林业大学林学院, 哈尔滨 150040

• 徐嘉晖
• 中建三局集团有限公司东北分公司, 沈阳 110179

• 宋金凤
• 东北林业大学林学院, 哈尔滨 150040

• 崔晓阳
• 东北林业大学林学院, 哈尔滨 150040

• 摘要：以长白山、小兴安岭和大兴安岭三大东北林区为研究对象，研究了各区域森林土壤的黑碳含量和密度等分布特征，并对比林型、地形和火烧强度等研究结果，探讨了上述因素对黑碳分布特征的影响.研究表明，东北森林土壤的黑碳分布在垂直方向上差异显著，表现为表层（A₁₁层）>亚表层（A₁₂层）（p<0.01），3个区域内表层土壤黑碳含量大小表现为：大兴安岭>长白山>小兴安岭，黑碳密度大小为：长白山>大兴安岭>小兴安岭.长白山林区不同林型的黑碳含量和密度存在明显差异，杨桦次生林显著高于原始阔叶红松林（p<0.01）；小兴安岭林区，同一土层不同坡位土壤黑碳含量和密度均表现为：下坡>上坡（p<0.01），不同坡向均表现为：阳坡>阴坡（p>0.05）；不同火烧强度下大兴安岭森林土壤黑碳含量和密度也有差异：对照<轻度火烧<中度火烧<重度火烧，且对照与中度、重度火烧强度间均差异显著（p<0.01）.综上可知，林型、坡位和火烧强度是影响东北森林土壤黑碳分布的重要因素，但各林区主控因素不同.

• Abstract：Based on three forest areas in northeast China, including Changbai Mountain, Lesser Hinggan and Greater Hinggan, the distribution characteristics (contents and densities) of soil black carbon in the forest areas above were studied. By comparing the results of different forest type, topography and fire intensity, the effects of the factors above on distribution characteristics of black carbon were discussed. The results showed that, the differences in black carbon vertical distribution of forest soils in northeast China were significant, and A₁₁ horizon was higher than A₁₂ (p<0.01). The order of black carbon contents for surface soils was Greater Hinggan> Changbai Mountain> Lesser Hinggan, the order of black carbon densities was Changbai Mountain> Greater Hinggan> Lesser Hinggan. For different forest types of Changbai Mountain forest area, there were significant differences in black carbon contents and densities, and the results of Polar-birch Secondary Forest were significantly higher than those of primitive broad-leaved pine forest (p<0.01). For Lesser Hinggan forest area, black carbon contents and densities of different slope positions in the same horizon were shown as follows:downslope>upslope (p<0.01), for different slope aspect were sunny slpoe> shady slope (p>0.05). For different fire intensity, there also were significant differences in black carbon contents and densities of Greater Hinggan, and the order was the controlp<0.01). Therefore, forest type, topography and fire intensity are all the important influence factors to black carbon distribution, however the main control factors of each forest area are different.

• Key words：typical forest areas of northeast China  black carbon distribution  forest type  topography  fire intensity  influence factors

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