摘要:选取2种水生植物狐尾藻,金鱼藻为研究对象,于2010年2 月中旬至6 月中旬在室内静水条件下对其吸收P和净化水质的能力进行了比较研究。结果表明:(1)不同植物的净增生物量差异较大,变化范围为109.9~1511.1 g·m-2;(2)不同植物的磷含量差异较小,其磷量变化范围分别是1.16~3.50 mg·g-1;(3)两种植物的水质净化能力存在差异,水体磷去除率与水生植物净增生物量存在较高相关性,而与植株磷含量不存在相关性,因而磷吸收量而不是植株磷含量应作为植物筛选的一个重要指标。
关键词:狐尾藻;金鱼藻;富营养化; 水质净化。
Abstract:Two aquatic plants uptake of phosphorus(P)and their water purification capacity were investigated in hydrostatic conditions from middle February 2010 to middle June 2010,Including Myriophyllum verticillatum ,ceratophyllum demersum L. Results showed that the net accumulated biomass strongly changed from 109.9 g·m-2 to 1511.1 g·m-2 among different plants and there was little difference in P concentration among different plants, with the range of P contents 1.16~3.50 mg·g-1and there was greater difference in the water purification ability among three plants. P removal efficiency in water body was significantly correlated with plant net accumulated biomass, not with P concentration in plants, thus P absorption intend of P concentration should be an important index for plants choosing.
Key words: Myriophyllum verticillatum ;ceratophyllum demersum L ;eutrophication;Water purification;
本文采用了两种植物分别是金鱼藻,狐尾藻。其中金鱼藻( ceratophyllum demersum L ) 是金鱼藻属,金鱼藻科,沉水性多年生水草,全株深绿色,茎细长,平滑。群生于淡水池塘、水沟、温泉流水及水库中。狐尾藻 (Myriophyllum verticillatum) ,被子植物门、双子叶植物纲、小二仙草科中的狐尾藻属,水生草本, 均为沉水植物。中国狐尾藻属植物常见有4~5种,如小狐尾藻、穗花狐尾藻、轮叶狐尾藻、三裂叶狐尾藻等,其中的小狐尾藻叶互生,其它三种的叶轮生。这几种狐尾藻,在中国南北方均有分布,生于池塘和湖泊中,有些可作绿肥。