海南岛不同地形上某些土壤化学性质的多样性分析

Landform-based pedodiversity of some soil chemical properties in Hainan Island,China

多样性指数长时间以来在生态学领域被用于分析不同生态体的发生规律 .将类似手段用于某些土壤化学性质 (土壤pH值、表层阳离子代换量和表层有机质含量 )多样性的分析中 ,讨论了基于海南岛土壤 地体数字化数据库 (SOTER) ,通过对不同地形上土壤 pH值、表层阳离子代换量和表层有机质含量类别SOTER单元的丰富度指数 (S)、多样性指数 (Shannon指数H’)和均匀度指数 (PielouE)的计算 ,建立了类别多度分布模型 ,并在地理信息系统环境中实现了海南岛不同地形上土壤化学性质多样性分析的数字化表达 .研究表明 ,上述研究路线具有可操作性 ,几种多样性指数和多度分布模型的建立可以较好地反映不同地形上土壤化学性质类别的空间变异特点 .因此 ,SOTER单元作为土壤性质多样性的测度单元是可行的 .

Diversity indices and abundance distribution models are the statistical tools having been applied by ecologists for decades to analyze the intrinsic regularities of various ecological entities.In this work,similar techniques were used to analyze the pedodiversity of some soil chemical properties in Hainan Island,China,and discussions were conducted on the basis of related SOTER digital databases.Through the calculation of the richness (S),diversity (H') and evenness (E) of pH value,CEC and organic matter content in surface soil of different landforms and the establishment and application of the multi-distribution models of these soil chemical properties,the pedodiversity of some soil chemical properties of different landforms in Hainan Island in the GIS environment could be expressed digitally.