【摘要】 [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,TP 0.5 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。更多还原

【Abstract】 [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.更多还原