Experimental Study on Growth Inhibition of Attached Algae to Phytoplankton

By controlling a certain temperature,illumination,pH,and setting N/P ratio between 10∶1 and 25∶1 to analyze the growth of competition between phytoplankton and attached algae in the laboratory,this paper provided a certain theory basis for the algae bloom control of eutro-phication in water.It also discussed the growth influence of phytoplankton and attached algae with glucose as additional carbon source.The results indicated that when N/P ratio was 20∶1,the phytoplankton concentration difference was the highest and its value was 159×105cells/L.The higher the temperature and concentration of nitrogen,the more obvious the competitive advantage of attached algae was.The phytoplankton adapted the higher concentration of COD better than attached algae.