PRODUCTION OF GREEN ALGAE SPROUTS ULVA RIGIDA C. AG
Biological features of development, high specific production, rich carbohydrate component, the presence of essential macro-and microelements make Ulva rigida C. Ag. (1823) an attractive object of mariculture and allow us to consider this species as an affordable source of raw materials in the future. The productivity of the ulva depends on many factors, including the ratio of gametophytic and sporophytic individuals in the culture. By adjusting the environmental conditions, it is quite possible to adjust the intensity of biomass growth and fruiting, obtaining a significant increase in algae thalloms and seedlings. It was found that the temperature of 18-26 °C and a decrease in the fertility of algae thallomas favorably affect the vegetative growth of biomass. An increase in salinity above 26 % and a change in illumination in the mode of reproductive phases, intensifies the fruiting of the ulva, reducing the growth of algae biomass. Ulva seedlings develop quite quickly and grow well in laboratory conditions, withstanding significant fluctuations in environmental parameters (salinity and light), reaching a marketable size (mass) in 6-8 months of cultivation.