The effect of salinity and pH on growth of oscillatoria agardhii gom

Abstract EN

The aim of this investigation to study the effect of different salinity concentrations (0, 5, 10, 15, 20, 25, and30) mg / l, and different levels of pH (3, 4, 6, 7.5, 9, 10, and12) on the growth of Oscillator agardhii, which was isolate from shatt-AL-Arab river / Basrah city.

After getting the pure isolation of algal were studied under the laboratory condition.

Chlorophyll (A) was used as indicator of the growth rate of algal every three days of experiment along (15) days.

the results were shows that, the optimum concentrations of salts lies between (1-15) mg / l for algal growth, whereas, the other concentrations above (15) mg / l caused a decrease in algal growth, also the optimum growth of algal was between (7.5-9) of pH and the growth inhibited at pH (6) and (9), and the large biomass (5.983) mg / l was obtained at 12 days of growth.

S