engleski

Management of forest resources in the Zagreb County

Zagreb County with the City of Zagreb, encompassing 30, 000 km&sup2 ; , is a very densely populated and developed area. With regard to such distinct population density, the importance and functions of forests are very large. The paper gives a survey of the current condition of forests and forestland in terms of ownership structure, purpose of forests, structure per tree species, management classes, age structure per area and growing stock, as well as potential productive capacities. The forested area amounts to 139, 275 ha ; of which 35, 027 ha (26%) are mainly privately owned coppice forests. Brushwood covers an area of 1, 419 ha, while productive non-covered forestland extends over only 1, 757 ha. Commercial forests cover an area of 136, 650 ha with 22.31 million m&sup3 ; ; of growing stock, which produces 750, 000 m&sup3 ; ; (6.38 m&sup3 ; ; /ha) annually. Although forests and forestland cover 1, 400 km&sup2 ; , which is 46.7% of the total area of the district, management with forest resources should be aimed at increasing potential productive capacities of all resources. With the support of the system dynamic model based on the defined management guidelines, the article discusses the predicted future development of these forests, which can be used as a starting point for rough long-term planning at a regional level. With regard to the trends in the area, growing stock and prescribed yield, simulation results have shown that consistent management could result in significant potential productive capacities of these forests. An increase in the area of high forests by 30, 000 ha, an increase in the growing stock by 7.8 mil. m&sup3 ; , an increase in the annual prescribed yield by 215, 000 m&sup3 ; , and an increase in silvicultural activities are some of the fundamental postulates of future management.

forest management; age-class distribution; future management guidelines trends in growing stock and prescribed yield; silvicultural activities; system dinamic modelling

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