松嫩平原不同盐渍土条件下蓝藻群落的生态分布  

Ecological distribution of Cyanophyta communities on saline-alkaline soils in Songnen Plain

作　　者：张巍[1] 冯玉杰[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《生态学杂志》2008年第5期718-722,共5页Chinese Journal of Ecology

基　　金：黑龙江省杰出青年基金资助项目(JC-02-04)

摘　　要：以松嫩平原典型的不同程度盐碱化草地为研究对象,测定了其土壤的电导率、离子组成、有机碳等,分析了3种类型盐碱土上的固氮蓝藻群落。结果表明:3种类型土壤的理化特征和蓝藻群落各有其特点,固氮蓝藻有7个属,其中以丝状种类占优势;蓝藻在不同类型盐碱土上分布略有差异,在中度盐碱土种类最为丰富;不同种类的蓝藻对生境的选择性不同;松嫩平原草地是个脆弱的生态系统,其土壤理化特性及藻类分布较特殊。因此,必须加强保护和管理。With three typical saline-alkaline grassland soils in Songnen Plain as test objects, this paper measured their electrical conductivity, iron composition, and organic carbon, and compared the nitrogen-fixing Cyanophyta comunities on the soils. The results showed that the physicochemical properties of test soils and the Cyanophyta communities had their own characteristics. There were seven genera of nitrogen-fixing Cyanophyta, with filamentous cyanobacterium as the dominant. The Cyanophyta had a slightly different distribution on the three saline-alkaline soils, with the richest species on moderate saline-alkaline tion of habitats. Songnen Plain is a kind of fragile soil, and different species had different selececosystem, and its soil physicochemical characteristics and algal distribution are relatively special. Therefore, its eco-protection and management should be enhanced.

关 键 词：盐碱地 松嫩平原 理化性质 固氮蓝藻 

分 类 号：S812.2[农业科学—草业科学]