This paper compares the forest structure, regeneration and distribution of dead wood in a virgin forest remnant and a closeto-nature managed beech -conifer mixture situated on Grmeč Mountain in Western Bosnia. The investigations were carried out in a 1 ha permanent sample plot and 35 circular plots (20 m radius) in the virgin forest and in 17 circular plots (25 m radius) in managed forests. The number of trees in the managed forest was significantly ( p ¼ 0.05) higher than that in virgin forest and the distribution of the number of trees per diameter classes had a decreasing trend, but with a different shape in the virgin forest compared to the managed stands. In the lower diameter classes, the stock volume recorded in virgin forest was half of that in the managed forest, whilst for higher diameter classes the cumulated volume of the growing stock was almost double in virgin forest. The young crops had a significantly lower presence in the virgin forest and a larger volume of dead wood was identified in the virgin forest than in managed stands. The study results are important in assessing the consequences of close-to-nature management on the forest structure and regeneration when compared to the condition in virgin forests.
UDK: 630*228(234.422 Bjelašnica)(253)
This work researches structural composition, texture and diversity of development phases of virgin forest „Ravna vala“ on Bjelašnica. Virgin forest „Ravna vala“ is located in central part of Bosnia and Herzegovina, about 20 km south west from Sarajevo on mountain Bjelašnica, on altitude of 1280 to 1450 m. First time it was described in 1978. Within it we have positioned permanent plot of the square shape in size of 1 ha. Research was conducted on permanent plot in three time series: in years 1978, 1988 and 2008, and on 46 temporary systematically positioned circular plots in diameter of 12.6 meters, where each represents as per 1 ha of virgin forest area. In virgin forest we have registered 689 trees per hectare and wood supply mass of 701 m3/ha. Through analysis of dynamics of growth of specific species trees, it is visible that beech suppresses fir, i.e. there is a shift in main species in virgin forest, therefore, in the last 30 years number of beech trees has tripled in the lower diameter classes. Virgin forest has mostly present optimum phase and evenness phase, and rejuvenation phase. Texture diversity is expressed through Shannon index in value of 1.69, and evenness index has the value of 0.86.
Background and purpose: In this paper was researched the morphological variability of seed and one-year seedlings of beech of different proveniences from the major part of its natural dispersing in Bosnia and Herzegovina (from the Bužim,
UDK 630*23/.24:582.632.2(497.6 Sarajevo)
630*111/.114:582.632.2(497.6 Sarajevo)
Panjače bukve u BiH zauzimaju površinu od 351.000 hektara, što je oko 13 % od ukupne površine šuma i šumskog zemljišta. Proizvodne mogućnosti ovih šuma nisu potpuno iskorištene pa je potrebno uzgojnim zahvatima poboljšati njihovo stanje. U ovom radu analizirane su stanišne karakteristike panjače bukve na lokalitetu "Musići" kod Sarajeva. U 60-godišnjoj panjači bukve postavljene su (u proljeće 2007. godine) dvije eksperimentalne plohe na kojim su provedena dva načina prorjeđivanja i to: selektivna prorjeda i selektivna prorjeda sa čišćenjem zaostalih i loših izbojaka sa panja. Stanišne i strukturne karakteristike imaju odlučujući značaj kod odabira načina prorjeđivanja panjača u cilju prevođenja u viši uzgojni oblik. Prorjedu treba prilagoditi stanju u kojem se panjača nalazi. Selektivna prorjeda uz uklananje zaostalih i loših izbojaka sa panja treba biti osnov za buduće mjere njege u mlađim panjačama bukve.
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