Physiological and biochemical traits, antioxidant compounds and some physico-chemical factors of Spirulina platensis cultivation as influenced by Moringa oleifera leaves extract culture medium enriched with sodium bicarbonate and kanwa

The prospects for using Moringa oleifera leaves extract (MLE) supplemented with different concentrations of kanwa or sodium bicarbonate (NaHCO3) as a low-cost alternative growth medium of Spirulina platensis were evaluated in small-scale outdoor cultivation system. present study was aimed to evaluate the potential MLE enriched (4 8 g L-1) and NaHCO3 on growth, chlorophyll content, biochemical characteristics, antioxidant compounds some physico-chemical factors. Jourdan’s standard taken control. results showed that parameters such cell population, biomass dry weight, productivity specific rate were positively affected NaHCO3 at concentration levels. addition urea, NaHCO3 in at levels increased significantly (p< 0.05) protein peroxidase polyphenol oxidase activity, conductivity, pH, total dissolved solids salinity from 20 25 days whereas decrease carbohydrate phenol content recorded during all period experimentation. highest values notably urea L-1. L-1 was shown be an appropriate can used commercial of S. platensis.   Key words: Antioxidant compounds, traits, growth, Moringa extract, factors, Spirulina