农牧交错区地形土壤因子与植物群落关系研究——以丰宁小坝子为例

对河北丰宁小坝子地区沙地植被恢复过程中植物与土壤环境性质进行了研究,选取15个指标,分别代表植被群落、地形因子和土壤性质。利用多元统计方法,对选取的指标进行了主成分分析和典范相关分析。结果表明沙漠化地区在植被恢复初期的植物多样性较低,土壤环境因子与物种多样性存在相关性,植被、地形和土壤因子相互影响:植被特征影响土壤理化性质的动态变化,反过来地形和土壤性质影响植被的分布和数量以及群落的结构。多元统计结果显示,地形、土壤养分与水分表现出较大的因子贡献率。不同因子指标集团的典范相关分析表明,坡位影响植被盖度,物种丰富度与土壤理化性质关系密切。

The Relationship Between Landform,Soil Characteristics and Plant Community in the Agro-pastoral Ecotone——An Example from Fengning County,Hebei

The relationship of plantation,landform factors and soil features in restoration process were researched.15 indexes were chosen,using multivariate statistical analysis techniques(Principle Component Analysis and Canonical Correspondence Analysis),the complex relationships between the soil properties,plant biodiversity and landform factors were examined.The results showed that plantation diversity was low in early successional stages of restoration process and soil environmental factors related to species diversity.The multivariate statistical analysis elucidated the relationships of three indices(topography,soil and plant).Slope positions were related with layer coverage,while biodiversity was correlated with soil property,soil water and organic matter.