engleski

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Spruce monocultures in Croatia are raised only on the open sites (meadows, pastures, clearings, non-wooded forest soils), and have a pioneering function on preparing a site for a natural or artificial return of autochthonous forest vegetation. They are grown in rotation periods of 60 to 70 years. On principle, at the end of the rotation period, spruce monocultures result in an autochthonous stand similar to the one that occur naturally in a given site. This can be done artificially by planting or sowing. Shelterwood fellings, usually in two cuts (regeneration and final cut) are conducted in spruce monocultures in such a way that seeds or seedlings are introduced immidiately before or after the regeneration cut. In doing this, a stable, biologically diverse pure or mixed stand is obtained which is dominated by autochthonous, mostly climatogenous, tree species. A spontaneous natural occurrence of young autochthonous vegetation is the best indicator that a site under a spruce monoculture is ready for conversion. In this paper authors analysed this principles on examples in Gorski kotar region of Croatia.

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nije evidentirano