缙云山不同植物群落空间结构及其与土壤肥力的关系

为了给保护缙云山植物群落多样性，维持良好的植物群落空间结构指明方向，采用比较法探讨了缙云山的灌木林、针阔混交林和常绿阔叶林植被的空间结构分布和物种多样性的变化特征，并分析了不同植被群落中土壤养分与物种多样性的相关关系。结果表明：不同植被类型空间结构层次分化明显，乔灌草层优势树种有着明显的综合优势；灌木林和针阔混交林的乔木层与灌木层物种多样性大于常绿阔叶林，草本层的物种多样性则以常绿阔叶林最高。土壤肥力养分因子pH值，随着土壤层次的增加有显著增大趋势，反之，有机质、有效氮磷钾含量水平则呈不同程度的降低；综合各养分因子含量情况，灌木林土壤的养分含量最高，常绿阔叶林次之，针阔混交林最低。另外，物种多样性与土壤肥力相关性分析得出，乔木层、灌木层和草本层植物多样性均与土壤肥力呈现出不同程度的相关关系。

Study on the Spatial Structure of Different Plant Communities and Soil Fertility in Jinyun Mountain

In order to protect the plant community diversity in Jinyun Mountain, maintain the spatial structure of plant community, to explore distribution of vegetation spatial structure and the variation patterns of species diversity in shrubbery, mixed conifer and evergreen broad-leaved forests in Jinyun Mountain were discussed in comparing method. The relationships between community diversity indexes and soil fertility were analyzed. It was found that: different vegetation type space structure labeled obvious differentiation, and the dominant tree species of arbor, shrub and herbage layers had obvious comprehensive advantages; species diversity in tree layers and shrub layers of shrubbery and mixed coniferous than evergreen broad-leaved forests, but species diversity in herb layers of evergreen broad-leaved forests were highest. With the increase of soil depth, pH value increase, while the organic matter, available nitrogen, available phosphorus and available potassium also decreased; comprehensive the content of soil nutrient, the greatest was shrubs, evergreen broad-leaved forests followed, and mixed conifer was lowest. the relationships between species diversity and soil fertility were studied by using correlation analysis, the results was: the species diversity in tree layers, shrub layers and herb layers and soil fertility showed varying degrees of correlation.