巢湖低丘山区典型植被群落与土壤环境因子特征研究

本文系统调查了巢湖低丘山区5种典型植被类型,即弃耕地、灌木林、人工马尾松林、草地以及次生马尾松林植被群落学特征、土壤养分状况,并分析了巢湖低丘山区典型植被群落与土壤环境因子的关系.研究结果表明:弃耕地显示了最高的植物物种数,其次为人工马尾松林和灌木林,草地物种数最低,平均仅为4种.总盖度以草地最高,达到95％,其次为次生马尾松林和灌木林,人工马尾松林总盖度最低.此外,弃耕地显示了最高的生物多样性与均匀度指数,其次为灌木林,而草地多样性指数和均匀度指数均最低.弃耕地土壤养分含量最高:次生马尾松林表层土壤有机碳、总氮、总磷与有效氮高于灌木林与草地,显示了较明显的土壤养分随植被演替过程的积累效应.相关分析表明生物多样性指数和均匀度指数与土壤养分状况呈良好的正相关关系,表明这一地区植被恢复处于演替发展阶段.

Study on community characteristics and soil properties of typical vegetations in Chaohu hill region

Community characteristics and soil properties of 5 typical vegetations (i.e. abandoned field, shrubbery, artifical pinus massoninana forest, grass land and secondary pinus massoninana forest) in Chaohu hill region were systematically investigated. The results showed plant species of abandoned field was maximal, followed by artifical pinus massoninana forest and shrubbery, and grassland was the lowest with the average value of 4. Grass land presented the highest total coverage (95%), then followed by secondary pinus massoninana forest, shrubbery and artifical pinus massoninana forest. The highest species diversity index and community evenness index occurred in abandoned field, followed by shrubbery and the last was grass land. Nutrient contents in surface soil of abandoned field were significantly higher than these of others. TOC, TN, TP and AN in surface soil of secondary pinus massoninana forest were higher than these of shrubbery and grass land, which indicated the accumulative process of soil nutrients with the evolution of vegetation. Furthermore, significant positive correlations were identified between species diversity index, community evenness index and soil nutrients, which suggested the vegetation evolution was at successive developing-stage.