To study the phosphorus absorption differences and competition abilities, the change of the growth and biomass of two water bloomforming cyanobacteria( Microcystis aeruginosa,Anabaena planctonica) in different concentration of inorganic phosphorus( K2HPO4) and organic phosphorus( ATP) were compared,and their kinetic parameters of phosphorus absorption( KSand including μm) were compared through the Monod equation. The results shows that kinetic parameters of Microcystis aeruginosa( KSand μm) are bigger than ...