Old-growth forests represent a very valuable field for research of natural processes. The application of remote sensing was carried out on two old-growth forests in the northwestern part of the Republic of Srpska. The sample plots from OG Janj show relatively higher mean values (NDVI, SAVI and EVI) compared to OG Lom, with the exception of the VARI. Karstified terrain and poor delay of snags in the top-layer of stand due to the impact of weather disasters and the tendency of OG Janj toward the terminal phase of old-growth forest development are potential reasons for the higher mean value of the VARI index.
Istraživanje je vršeno u vještački osnovanoj sastojini crnog bora koja pripada šumi posebne namjene u okviru park-šume Slatina. U radu je izvršeno prikupljanje podataka primjenom Field-Map tehnologije, koja je omogućila uzgojnu analizu osnovnih i pomoćnih elemenata strukture sastojine. Posebno je kreirana baza za prikupljanje podataka koja se odnosi na dendrometrijske karakteristike stabala i uzgojnu klasifikaciju. Analizom teksture sastojine na osnovu vizualizacije i mapiranja Field-Map tehnologijom izdvajana su stabla budućnosti u skladu sa njihovim karakteristikama i potrebama prostornog rasporeda. Vizualizacijom sastojine na osnovu horizontalnih i vertikalnih projekcija olakšano je praćenje promjene u sastojini nakon izvršene doznake stabala, odnosno uzgojnih zahvata. Prednost primjene Field-Map tehnologije u odnosu na tradicionalne metode prikupljanja i obrade podataka je u preciznosti, brzini obrade i smanjenim troškovima. Na osnovu dobijenih rezultata analize definisane su optimalne uzgojne mjere (prorede) u sastojini i modelovane različite uzgojne situacije nakon doznake stabala.
Veliki nedostatak utvrđivanja i kontrole stepena obrasta jednodobnih šuma u praksi uređivanja šuma u Bosni i Hercegovini leži u činjenici da se koriste prinosne tablice izrađene za područja u drugim zemljama koje karakterišu drugačiji stanišni uslovi i način gazdovanja. Indeks obrasta sastojine prema Rajnekeu (Reineke) je, kao relativna mjera obrasta sastojine, pokazatelj produkcije pri različitim sastojinskim strukturama i u različitoj starosti. Preliminarna istraživanja pokazuju da se posmatrani pokazatelj obrasta može uspješno koristiti u praksi uređivanja šuma u Bosni i Hercegovini za jednodobne sastojine. Potreba za primjenom ovog pokazatelja obrasta je naročito izražena kada su u pitanju vještački podignute sastojine.
In central Bosnia and Herzegovina, in the Zavidovići-Teslić area, the study of the radial growth of Austrian and Scots pine (autochthonous pine species) trees was conducted using the dendrochronological method in order to identify the differences between the species in terms of the influence of climatic variables on the tree ring formation. Trees were sampled in five experimental areas or five sites. The first site had a Scots pine stand, while the second had an Austrian pine stand, and the other three sites had mixed stands of Scots and Austrian pine. Cross-dating was conducted using visual on-screen techniques of CDendro software and statistical methods using Cofecha software. The tree ring series were standardized using the Arstan program and cubic smoothing spline. It produced Scots pine regional chronology, 145 years long (1870-2014), and Austrian pine regional chronology, 180 years long (1835-2014). Correlation analysis of the relationship between the index of tree-ring width and precipitation and temperature in the characteristic periods of the year showed a negative effect of temperature (except in winter months) and a positive effect of precipitation on the tree ring formation. The statistically significant dependence of the tree-ring width index on the SPEI indices indicates a significant impact of moisture deficiency on the tree ring formation in the period from June to August (r = 0.33 in June, r = 0.45 in July and r = 0.47 in August) for Scots pine and in the period from June to September (r = 0.36 in June, r = 0.43 in July, r = 0.47 in August and r = 0.30 in September) for Austrian pine. The analysis of the relationship between climatic parameters and the chronologies of Scots and Austrian pine shows similar relationships between radial growth and climate but the influence of climate is somewhat more pronounced in Austrian pine. In the study area, the radial growth of both tree species is significantly determined by climate conditions. In other words, the chronology of these species has a good climatic signal, especially the drought signal in the summer months.
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