Abstract:
Russian olive (Elaeagnus angustifolia L.) is an invasive species, which has spread through the territory
of Ukraine. It is a nitrogen-fixing species-transformer, which changes the grass vegetation
cover within the boundaries of its phytogenic field. One of the possible causes of these changes is
the allelopathic activity of the species. During the fieldwork in 2015, there were collected samples
of soil in order to conduct an analysis applying the Neubauer-Schneider method. The results do
not revealed allelopathic activity of E. angustifolia. The experimental plants had no significant
morphological and biomass differences with the control ones. Conclusively, the changes in grass
vegetation cover have no relation to the allelopathic substances of E. angustifolia and could be
caused by nitrogen-fixing activity.
