【摘要】 为探究关帝山林区植被类型对土壤质量的影响，以林区内6种典型植被类型（云杉-华北落叶松针叶混交林（Ⅰ）、华北落叶松纯林（Ⅱ）、华北落叶松-油松-杨桦针阔混交林（Ⅲ）、杨桦阔叶林（Ⅳ）、沙棘灌木林（Ⅴ）、草地（Ⅵ））为研究对象，分析了其林下土壤物理性质、化学性质及生物学性质指标共12个，并用主成分分析法（PCA）构建评价指标最小数据集（MDS）对不同植被类型土壤质量进行评价。结果表明，不同植被类型间土壤物理性质、化学性质和生物学性质差异显著；云杉-华北落叶松针叶混交林和华北落叶松纯林在非毛管孔隙度、有机质、全氮和有效养分含量方面均显著高于其他植被类型；筛选出研究区内土壤质量评价MDS指标包括非毛管孔隙度、全磷、过氧化氢酶和碱解氮；6种植被类型的土壤质量指数从大到小排序为Ⅰ（0.656）>Ⅱ（0.615）>Ⅳ（0.521）=Ⅴ（0.521）>Ⅵ（0.499）>Ⅲ（0.364）,MDS指标土壤质量指数平均值排序为过氧化氢酶（0.151）>全磷（0.150）>非毛管孔隙度（0.133）>碱解氮（0.098），土壤全磷和过氧化氢酶是影响该研究区土壤质量的主要因素，而且林地土壤质量随海拔升高而增加。总体来看，关帝山林区各林分土壤质量较好，大多处于中等及以上水平，潜在肥力水平较高，海拔高度是该地区土壤质量潜在的环境限制因子。更多还原

【Abstract】 In order to explore the impact of different vegetation types of the forest area in Guandi mountain on soil quality,in this study, six typical vegetation types, including coniferous mixed forest(mainly consisted of spruce-Larch-Principisrupprechtii)（Ⅰ）, pure Larch-Principis-rupprechtii forest（Ⅱ）, coniferous and broad-leaved mixed forest(mainly consisted of Larix principis-rupprechtii-Pinus tabulaeformis-Popular birch)（Ⅲ）, Poplar birch broad-leaved forest（Ⅳ）, Hippophae rhamnoides shrub（Ⅴ）, and grassland（Ⅵ）, were taken as the objects studied to analyze 12 indexes of physical, chemical, and biological properties of understory soil. The soil quality of different types of vegetation was evaluated by a minimum data set(MDS)constructed by principal component analysis(PCA). The results showed that the soil physical, chemical and biological properties of different vegetation types were significantly different. The spruce-Larch coniferous mixed forest（Ⅰ）and the pure Larch forest（Ⅱ）were significantly higher than other vegetation types in terms of non-capillary porosity, the contents of organic matter, total nitrogen, and effective nutrient. The minimum data set indexes that were applicable to evaluate soil quality of different vegetation types in the study area were selected, they were non-capillary porosity, total phosphorus, catalase, and alkali hydrolyzed nitrogen. The order of soil quality index was Ⅰ（0.656）>Ⅱ（0.615）>Ⅳ（0.521）=Ⅴ（0.521）>Ⅵ（0.499）>Ⅲ（0.364）. The order of average value of soil quality index by MDS index was catalase(0.151)>total phosphorus(0.150)>noncapillary porosity(0.133)>alkali hydrolyzed nitrogen(0.098). Soil total phosphorus and catalase were the main factors affecting the soil quality in this study area. Furthermore, the soil quality of woodland increased with increase of altitude. In general, the soil quality of each stand in Guandi Mountain forest area was relatively good, most of them were at the medium level or above,the potential fertility level was high, and the altitude was the potential environmental limiting factor of the soil quality in this area.更多还原