STUDIES ON THE RELATIONSHIP BETWEEN THE GROWTH OF CHLORELLA VULGARIS AND THE PHOSPHORUS FRACTIONS IN WATER OF LAKE DONGHU, WUHAN

Phosphorus in water of lake Donghu, Wuhan was fractionated into five sorts of P fractions;total soluble phosphorus(TSP), soluble reaction phosphorus(SRP), total reaction phosphorus(TRP), soluble hydrolysable phosphorus(SHP)and particular phosphorus(PP). Effects of these P fractions on the growth of Chlorella vulgaris were investigated. The regression equations between each P fractions as well as total phosphorus(TP)and the growth of Chlorella vuigaris were obtained and compared with each other. The models of growth of Chlorella vulgaris(N)depending on P fractions were established by multiple regressing, and three models can be helpful for predicting the potential growth of the algal and assessing the eutrophication of the lake.