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通过在山西吕梁地区分别在山杨(Populus davidiana Dode)、落叶松(Larix principisrupprechtii)、油松(Pinus tabulaeformis)林内设置样地进行林分结构和土壤调查采样,测定了土壤有机碳密度和养分含量,分析了不同林分对土壤有机碳积累的差异性及其影响因素。结果表明:该研究区三种林地土壤有机碳密度山杨林(57.08kg/m2)>落叶松林(16.54kg/m2)>油松林(6.71kg/m2);油松林、落叶松林土壤有机碳密度随着土层深度递减,山杨林则在10-30cm土层土壤有机碳碳密度最低,土壤表层与深层都具有富集作用。土壤中的TN、TP和有机质的含量与土壤有机碳之间的差异变化规律基本相同,山杨林也表现出表层和深层含量较高的特点,相关分析结果说明三种林分类型土壤养分与土壤有机碳碳密度密切相关。
Soil samples were collected from Populus davidiana Dode, Larix principisrupprechtii and Pinus tabulaeformis forests in Luliang, Shanxi Province to determine the soil organic carbon density and nutrient content , Analyzed the differences of soil organic carbon accumulation under different stand and its influencing factors. The results showed that the soil organic carbon density in three kinds of forestlands in this study area was 57.08kg / m2> Larix gmelini forest> 16.54kg / m2> Pinus tabulaeformis forest> 6.71kg / m2> With the decreasing of soil depth, the density of soil organic carbon in Shanyang forest was the lowest in 10-30cm soil layer, and both the surface and the deep layer of soil had enrichment effect. Soil TN, TP and organic matter content and soil organic carbon differences between the changes are basically the same, Populus forest also showed higher surface and depth characteristics of the correlation analysis showed that the three types of soil nutrient and Soil organic carbon density is closely related.