The effect of different concentrations of nitrate and phosphate and soil extract on the
total growth and chemical composition to the green algae Chorella vulgaris isolated from
some localaquatic habitats had studied in this research, at three type
of temperature (30 ,
25, 20), the maximum total growth reached up to 4.66 Cell/h and the lowest duplicated
time was 1.55 h at temperature 25ºC and at concentration of nitrate 1 g/L , 0.05 g/L of
phosphate, and 10/100 mL of soil solution , while the number of cells reached to 59423,61
cell/mL at the day 22 of cultivation.
The chemical composition differed by the changing of temperature and nutrient
medium composition , while the maximum protein content reached to 48.36 % at the
maximum concentration of nutrients and 25 ºC of temperature , the maximal concentration
of lipid was 19,78 % at temperature 25ºC and concentration of nitrate 0.1 g/L and 0.01 of
phosphate and 6/100 mL of soil solution , the concentration of carbohydrates were the
lowest where the maximal ratio was 17.41 % at temperature 20ºC .
