科尔沁沙地盐生植物群落复合体中主要植物群落的盐分生态

Salt ecology of main plant communities of halophyte community complex in Keerqin Sandy Land.

本文探讨了科尔沁沙地土壤盐分对该区盐生植物群落复合体的形成、种类组成、水平分布格局和物种多样性的影响,阐明了在不同土壤盐分条件下同种植物体内K、Na、Ca、Mg总量的恒定性和Na含量的变化规律。根据植物体内Na含量和K、Na、Ca、Mg的组成比例,提出了植物对盐碱地的适应类型及其划分方法,并以此法将本区草甸植物归为4种类型:Na>K>Ca>Mg型;K>Na>Ca、Mg型;K>Na、Ca、Mg型和K>Ca、Mg>Na型。

The effect of soil salinity on formation of halophyte community complex and its species compositions, patterns of horizontal distribution and species diversity in Keerqin Sandy Land of Northeast China was studied. The constancy of total contents of potassium sodium, calcium and magnesium, and variation regularity of sodium content in a species were explained. Based on sodium content and composition proportion of potassium, sodium, calcium and magnesium in a plant, adapted patterns of plant to saline-alkali soil and their divided method were proposed. According to the method, meadow plants in studied area could be divided into four patterns: Na>K>Ca>Mg type; K>Na>Ca, Mg type; K>Na, Ca, Mg type; K>Ca, Mg>Na type.