Abstract:

The study investigated the effect of ammonium chloride, ammonium nitrate and urea on the growth of Isochrysis galbana Parks contrast to sodium nitrate. The indexes that reflect the growth of algae include algae cell density and pH. Statistical analysis showed that the biological in training before 3 days group and control group cell density differences are not significant (P > 0.05), and the first four days later each group of cell density differences are significant (P<0.05). The results showed that ammonium nitrate is the best nitrogen source for Isochrysis galbana Parks growth, i.e.algal cell density is significantly higher than that of other source of nitrogen, secondly, sodium nitrate and urea , ammonium chloride in the lowest (P < 0.05).