穗花狐尾藻附着藻类对不同氮·磷浓度的响应

目的]研究穗花狐尾藻附着藻类对水环境中不同氮、磷浓度的响应.方法]在室内模拟水生微宇宙环境,比较不同试验组不同时期附着藻类的密度变化.结果]模拟单次大营养脉冲的E组与其他试验组的水体总氮、总磷指标和附着藻类的密度均在试验后期达到动态平衡,且各组水体总氮、总磷、水体叶绿素a和附着藻类密度差异性显著（P＜0.05）,表现为D＞E＞C＞B＞A;在中等氮、磷浓度（TN 3 ml/L,TP0.5 mg/L）水平下附着藻类与穗花狐尾藻能够保持相对稳态.结论]微宇宙环境水系统对氮、磷及附着藻类的密度具有一定的承载能力,且附着藻类的密度与水体氮、磷浓度变化密切相关.

Response of Attached Algae and Myriophyllum spicatum to Different Concentrations of Nitrogen and Phosphorus

Objective]The research aimed to study the responses of attached algae and Myriophyllum spicatum to the concentrations of nitrogen and phosphorus in water.Method]Through indoor simulation of micro-cosmos aquatic system,the density changes of the attached algae at different periods of each experimental group was compared.Result]The results showed that total nitrogen,total phosphorus,and density of attached algae in group E which stimulated a single large nutrient pulse and other groups achieved a dynamic balance at the late stage of the test.And the differences of total nitrogen,total phosphorus,chlorophyll a and density of attached algae were significant （P ＜ 0.05） between different groups,showing as D ＞ E ＞ C ＞ B ＞ A.In medium nitrogen and phosphorus concentrations （TN 3 ml/L,TP 0.5 mg/L）,the attached algae and Myriophyllum spicatum remained relatively steady.Conclusion]This study suggested that micro-cosmos aquatic system had a certain bearing capacity to nitrogen,phosphorus and the attached algae,and the density of attached algae was closely related to changes of nitrogen and phosphorus concentration.