Naslov
Natural Reforestation and Future of Beech and Fir Forests in the Risnjak NP

Autori
Dubravac, Tomislav ; Vuletić, Dijana ; Vrbek, Boris

Izvornik
Periodicum Bilogorum (0031-5362) 107 (2005), 1; 73-79

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
stand structure; natural regeneration; young growth; crown cover; over soil; digitalisation of crowns; fir; beech

Sažetak
The paper describes the state and values of some structural elements which have an effect on natural reforestation and sustainability of non-economic forests, using as an example the "Risnjak" National Park. By the application of digitalisation a three-dimensional digital dynamics model and vertical profile of a stand was produced with actual measured trees in the field. The distribution of the number of trees indicates the entire absence of fir of the smallest diameter degrees, and also the lack of medium diameter trees. With the increase of diameter breast height this difference disappears in the medium diameter trees (55 cm) and above this diameter an excessive number of large diameter trees is present . This confirms the fact that for several decades the accession (influx) of the fir from natural regeneration has failed to occur, which, as a consequence, can be observed in the change of tree species. The results of measurements of numbers and quality of young growth during the years of monitoring do not guarantee the further course of the anticipated normal process of nature reforestation, which is the fundamental objective of reforestation and maintenance of forest sustainability.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo

POVEZANOST RADA