LAUSR

This study aims to determine the effect of salinity on the growth of microalgae C. vulgaris cultured in 5% concentration of water hyacinth liquid organic fertilizer.  The research used a completely randomized design with four salinity treatments at 30, 35, 40 and 45 ppt in triplicates.  The volume of culture media was 150 mL that consisted of 142.5 ml of sterile sea water and 7.5 ml of water hyacinth organic fertilizer.  The increase in microalgae cell density was observed every other day using haemocytometer under light microscope.  The culture was harvested after they reached stationary phase at day 8.  Culture age (p= 0,00 0.05) from other salinities.  This study suggested that 40 ppt can be used to culture C. vulgaris in 5 % concentration of water hyacinth organic medium to obtain better growth and higher biomass production.