摘要
在室内研究了有、无伊乐藻存在条件下,不同水平的氮及氮磷比(N/P)对实验体系中附着藻类和浮游藻类生长的影响,结果表明:1)在有沉水植物的体系中,当氮浓度较高时(5 mg/L),浮游藻类对N/P的变化比附着藻类更为敏感;而当氮浓度较低时(2 mg/L),浮游藻类与附着藻类对N/P的响应则没有显著的差异;2)在有沉水植物的体系中,当N/P为15时,随水体中氮浓度的升高,附着藻类的生物量显著增加,但浮游藻类的变化不显著．当N/P为25时,随水体中氮浓度的升高,浮游藻类及附着藻类的生物量均显著升高;3)附着藻类的生物量在无沉水植物(伊乐藻)存在的情况下要比有沉水植物(伊乐藻)存在时高得多,且随氮浓度升高,其生物量的增加量也远高于后者,而对浮游藻类而言,情况则完全相反．
The effects of nutrients on periphytton and phytoplankton in the condition with and without macrophyte were studied. The results show ： 1 ） When the nitrogen concentration was 5 mg/L, the effects of the nitrogen vs phosphorus ratio on phytoplankton were more sensitive than periphyton. While the nitrogen concentration was 2 mg/ L, this effect was no significant different between the periphyton and phytoplankton. 2） When the ratio of nitrogen vs phosphorus was 15, the periphyton biomass increased significantly following the increasing of nitrogen, but hytoplankton biomass was relatively stable. When this ratio was 25, the biomass of both periphyton and phytoplankton were increased significantly following the increment of nitrogen. 3 ） The periphyton biomass was higher and increased more fast following the increasing of nitrogen in the condition without macrophyte than with macrophyte, while it was reverse for the phytoplankton.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2007年第2期125-130,共6页
Journal of Lake Sciences
基金
国家科技部863项目"太湖梅梁湾水源地水质改善技术"(2002AA601011)
中国科学院知识创新战略行动项目
"长江中下游地区湖泊富营养化发生机制与控制对策"(KZCX1-SW-12)共同资助
关键词
附着藻类
浮游藻类
营养盐
太湖
Periphtic algae
phytoplankton
nutrient
Lake Taihu
