油松林间火烧迹地深层土壤物理性质及碳储量的变化研究

Study on Changes of Deep Soil Physical Properties and Carbon Storage in Burned Area of Pinus tabulaeformis

摘要:

林火的干扰在北方森林生态系统更新演替、物质循环中发挥着重要的作用，林火对北方地区森林表层土壤碳密度、生物量有着明显的改变作用，然而有关较深土层（≤40 cm）的碳储量变化情况研究相对较少。以辽西地区油松林火烧迹地作为调查样地，通过对周边立地条件一致的未发生火灾的林区作为对照，以土壤物理性质、碳储量作为指标开展调查分析，结果表明，油松林火烧迹地土壤的物理性质、碳元素含量发生了不同程度的变化，林火显著增加了土壤的温度和pH值，极显著降低了土壤的含水量；林火对深层土壤容重的影响不明显；火烧迹地上深层土壤全碳含量、可溶性有机碳含量均极显著低于对照处理。

Abstract:

The disturbance of forest fire plays an important role in the renewal and succession of the forest ecosystem in the north and the material cycle. Forest fire have a significant effect on the carbon density and biomass of the forest surface soil in the northern region. However, the deeper soil layer ( There are relatively few studies on the changes in carbon storage less than 40 cm. Pinus tabulaeformis forest burned area eastern Liaoning was used as the survey sample site, and the surrounding site conditions were consistent without fires as a control, and the soil physical properties and carbon storage were used as indicators to conduct investigation and analysis. The results showed that Pinus tabulaeformis forest burned site soil physical properties and carbon content of forest fires have changed to varying degrees. Forest fire have significantly increased the temperature and pH of the soil, and have significantly reduced the water content of the soil. The impact of forest fire on the bulk density of deep soil is not obvious; The total carbon content and soluble organic carbon content of the deep soil above the site were significantly lower than the control treatment.