DIGITALNA ARHIVA ŠUMARSKOG LISTA
prilagođeno pretraživanje po punom tekstu




ŠUMARSKI LIST 1-2/2018 str. 51     <-- 51 -->        PDF

MATERIAL AND METHODS
MATERIJAL I METODE
Study area – Područje istraživanja
The research was conducted in managed and virgin beech forests with similar production potential. The study area included five managed stands (33a - Homoljske planine, 122a - Istočna Boranja, 27a - Zapadna Boranja, 31a - Čemernik-Ostrozub and 44a - Željin) and three virgin forest stands (Danilova kosa, Vinatovača and Kukavica) on the most productive sites in Serbia (Fig. 1).
General characteristics of the studied European beech stands are presented in Table 1.
The observed stands have similar production potential (classes I to II, Mirković 1969) but they differ in stand characteristics. They are located in the mountainous range of 400 to 1200 meters above sea level which is the zone where monodominant beech forests in Serbia are widespread. The share of other tree species in the volume was about 0 to 1%. According to historical management plans, in studied managed stands applied were selection and group selection systems in last 40-50 years. All three virgin forests have been declared strict nature reserves by Serbian Government (Danilova kosa in 1950; Vinatovača in 1957 and Kukavica in 1980). However, even before the protection of these stands was declared, there had been no intensive management treatments.
Data collection – Prikupljanje podataka
Systematic sampling was used for the purpose of data gathering and processing in the managed stands. Circular sample plots of 0.05 ha in size, at a distance of 100 x 100 m (one plot represents one hectare) were set. Diameter at breast height (dbh) and tree heights (h) were measured in all test areas. Two cross diameters were taken. The height of trees was measured using Vertex 3 clinometer. In two virgin forests stands (Danilova kosa and Vinatovača) all trees had their diameters and heights (total survey) measured, while a set of seven square and rectangular experimental fields of