Also, the maximum values of growth parameters (cell number and dry weight) and
total photosynthetic pigments of Chlorella vulgaris cultures were 225%, 161% and 213% of that of the control cultures, when algal cultures subjected to 3 ppm MgCl2 only, respectively. Whereas, the minimum values of cell number, dry weight and total photosynthetic pigments of Chlorella
vulgaris cultures were 93 %, 96 % and 77% of that of the control cultures when algal
cultures subjected to 6 ppm MgCl2 only (Fig.1-a).