植物群落演替与土壤发展之间的关系

本文运用植物群落中植物优势种的重要值与相对应子群落的土壤特征值直接相关联的分析方法,对湖北宜昌大老岭的桦(Betula)、栎(Quercus)、栗(Castanea)七个群落类型的三个演替途径的土壤动态进行分析,结果表明:在植物群落的演替过程中,土壤中的Ca、pH值减少;离子代换量增加;Na、Mg、NH_4+-N、速效P、速效K、有机质的含量是随着物种的变化而呈不同的趋势。因此,植物群落的演替是生态系统的动态过程。

THE RELATIONSHIP BETWEEN THE PLANT COMMUNITIES SUCCESSION AND THE SOIL DEVELOPMENT

The researched communities are mainly composed of Betula sp., Quercus spp., Castanea spp. in Large-Old Range, Yichang, Western Hubei. A dynamic process of soil has been found in the plant community succession. The results indicate that the values of Ca, pH decrease, ions exchangable capacity increases, and the values of Na, Mg, NH_4~+-N, P, K, organic C vary with the different species. Therefore, the community succession is a co-development process between the plants and the soil in community.