E.N. Novruzov, I. Kerimova, A.A. Rajabov

Institute of Botany of NAS of Azerbaijan Republic, Baku, Azerbaijan

Biological features of seabuckthorn fruits are high productivity, absence of periodicity and stability of fruitage. However misuse of its thickets will result in sharp decrease of their productivity or to absolute disappearance. Azerbaijan is included into an area of natural distributions of seabuckthorn fruits. They were formed in optimum conditions for them and consequently should be steady and productive at care of thickets. The carried out supervisions have confirmed our assumptions. It is revealed, that the care of thickets is the basic parameter of increase in productivity of thickets of seabuckthorn. The seabuckthorn is a photophilous plant and better grows and fructifies in pure thickets. Accompanying breeds (Populus L., Salix L., Elaeagnus L. etc.) outgrowing seabuckthorn, shade and oppress the latter. In more humid places the seabuckthorn fruits are superseded by Populus L., Salix L., and in arider places by Elaeagnus L.. It was established that lighting up, rarefying, cleaning of condensed, expansion and condensation rarefied, rejuvenation of the old and unproductive thickets are the basic measures for increasing of productivity and conservation of natural thickets.

It is revealed, that collection of seabuckthorn fruits is of great importance in productivity and conservation of natural thickets. There are many ways of gathering of seabuckthorn fruits, but none of them solve questions well. Cutting of two-year-old sprouts is frequently used. Because of biological features of fruitage of seabuckthorn this method results in decrease of double and threefold amount of fruits in crops of the next years. Supervision and results of experiments show, that regular cutting depresses and exhausts thickets. Main condition to conserve thickets and increase its productivity can be reached by the lightening up thickets and conservation of a part of an annual overgrowing on fruitage bushes during harvesting.