Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454

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THE INFLUENCE OF WATER SALINITY ON THE GROWTH AND REPRODUCTION OF WATER HYACINTH AT NUTRIENT LOAD

Makeyev I.S 1 Gorbunova S.Y. 2 Korotaeva M.I. 1
1 Lobachevsky State University of Nizhni Novgorod
2 Institute of biology of southern seas n.a. A.O. Kovalevsky
In laboratory experiments studied the effect of 2 ‰, 4 ‰ and 6 ‰ solutions of sea salt on the growth and reproduction of cumulative culture Eichornia crassipes (water hyacinth) in conditions of high initial nutrient loading of urea (1.0 g/l) and potassium hydrogen phosphate (0.4 g/l). Selected 4 phase dynamics of biomass. In the initial post-stress period of 22 days discovered the stimulating effect of sea salt for growth in 2 ‰ and 4 ‰. In the next 10 days were observed: depression, death of leaves and plants in the medium of 4 ‰, 6‰. During 32-45 day was a recovery culture in the control and 2‰, while the production and reproduction were significantly higher in the control. Period 46-55 day was characterized by slow growth and reproduction due to the exhaustion of the stock of nutrients in the environment. Dynamics of biomass correlates with pH variation reflecting the increase rate of photosynthesis.