氮、磷等环境因子对太湖微囊藻与水华鱼腥藻生长的影响

The Impact of Nitrogen,Phosphorus and other Environmental Factors on Microcystis and Anabaena Growth in Taihu Lake

为探索太湖主要水华藻类(微囊藻与水华鱼腥藻)在多种环境因子作用下的生长变化机理,在实验室内对部分水华藻类(微囊藻、鱼腥藻)进行分离培养,研究氮、磷、温度等环境因子对水华藻类生长增殖的影响。研究表明,高水温(30℃)是微囊藻的最适生长温度;随着氮、磷浓度的提高,微囊藻的生长速率加快;低磷是鱼腥藻生长的限制因子。同时,通过野外测定的各项指标发现,当藻类密度较低时,其与总氮、总磷呈正相关。

Taihu Lake in Suzhou is the main source of water. In order to explore the mechanism of Microcystis and Anabaena growth under a variety of environmental factors, isolated and cultured Microcystis and Anabaena in lab. Studied the impact of nitro- gen ,. phosphate, temperature and other environmental factors on the growth of Microcystis and Anabaena. Research shows that, high water temperature（ 30~C ） is the optimum growth temperature for Microcystis. With the increase of concentration of nitrogen and phos- phorus, Microcystis growth rate improves. Low phosphorus concentration limits the growth of Anabaena. At the same time, we found that, in the wild, when algae density is low, the algal density is positively correlated with the total nitrogen and total phosphorus.