Effects of Salinity and Gillard Medium on the Density and Specific Growth Rate of (Chlorella vulgaris)

Effects of Gillard media and 4 salinities (15, 20, 25 akd 30ppt) on growth parameter of chlorella vulgaris were surveyed using a completely randomized design. Expriments lasted 12 days. All treatments had three replication. Acording to the results the highest density of chlorella vulgaris with 125.30 × 106 cells/ml ± 0.41 × 106 cells/ml was observed in the treatment with salinity of 20ppt which was significantly different from the others ( P<0.05). the minimum density of chlorella vulgaris with 101.62 × 106 cells/ml ± 1.54× 106 cells/ml was observed in salinity of 30 ppt. The maximum specific growth rate of 1.92 ± 0.08 was observed in salinity of 20ppt on day2 and the minimum growth rate of 0.08 ± 0.02 was observed in salinity of 15ppt during days 6-8 . Acording to the results, Gilard medium under salinity of 20 of ppt is suitable for cultivating of chlorella vulgaris in laboratory.