Effect of Different Phosphorus Conditions on the Growth of Microcystis aeruginosa

Static tests were conducted to study and analyse the growing situation of M. aeruginosa and variation of dissolved total phosphorus in medium under laboratory condition. The results shows that the higher is the concentration of exogenous phosphorus, the longer log phase does M. aeruginosa have. The limiting concentration of phosphorus for growth of M.aeruginosa is 0.1mg/L. As cultured with different phosphorus source, the specific growth rate of M. aeruginosa decreased in the following order K²HPO⁴>; NaH₂PO₄>;Na₃PO₄. K2HPO₄ is easily used for M. aeruginosa growing.