Abstract:
This article presents the scientific results obtained from the application of the
algae biomass Nostoc gelatinosum (Schousboe) Elenkin as a biofertilizer in the open field
cultivation of the sunflower (Helianthus annuus). When applying the algal biofertilizer, there was a
positive influence both on the soil and on the plants, manifested by a minor change of soil pH in the
weak alkaline direction, the quantitative increase of the total nitrogen accumulated in the soil, the
increase of the height of the plant stems and the increase of the obtained crop. It is recommended to
apply the algal biofertilizer based on the cyanophyte algae biomass nitrogen fixing Nostoc
gelatinosum (Schousboe) Elenkin to the cultivation of the sunflower under the conditions of the
Republic of Moldova
