A period of stagnation in silver fir development has been recorded in all felled trees in selection forests of Serbia (233 trees on Mt. Goc and 451 trees on Mt. Tara). In the selection forests on Mt. ...Goc, the stagnation stage ranges between 40 and 330 years, but on Mt. Tara, it ranges from 15 to 185 years. It was concluded that the duration was caused not by the ecological and productivity potential (site class) of the soil for fir development, but primarily by the growth space, resulting from the application of single-tree selection or group selection systems. It was also found that the duration of latent state and tree sizes attained over that phase (except for height, and that was to a lesser extent) did not affect the silver fir tree development in the post-stagnation period.
Mixed forests of broadleaves and conifers, thanks to their high productivity and high biodiversity, are the most valuable part of the growing stock in Serbia. The aim of this research was to analyse ...the mixed old-growth forests of fir, spruce and beech in the reserve Račanska Šljivovica so as to define the laws which could be applied in the future forest management on Mt. Tara. The research was based on the data of six periodic complete inventories followed by standard dendrometric and statistical processing. Forest structure was similar to the typical selection structure. The recruitment dynamics (except beech) was relatively favourable, with the ratio to dead trees amounting to 1.72. The number of trees and the volume increased constantly, attaining 422.2 trees/ha, i.e. 800.3 cubic meter/ha, and the volume increment was above 12 cubic meter/ha, despite a slight drop. Silver fir was the protagonist of the selection structure and productivity. It is necessary to stimulate the survival and development of beech at the concrete site, to examine the balanced number of trees and volume, and to investigate the relationship between the number of recruited trees and the stand volume.
Valuable broadleaves, including also wych elms, belong to the category of rare tree species in the growing stock of Serbia. The conservation of Serbian forest diversity and the genetic potential of ...these tree species require a multidisciplinary study. In this respect, we undertook a dendrometric and health analysis of a wych elm tree on Goč, as it is a rarity by its dimensions, not only from the local, but also from the regional aspects. The tree is 266 years old, its diameter at breast height is 2.09 m, height 42.1 m, and volume (d is greater than 3 cm) 56.35 cubic meter. Current height increment culminated early, at the age of 20-30 years, attaining 0.5 m, and current diameter increment at the age of 40-50 years when its value was 14.4 mm. The above data point to a high productivity of this elm tree and to favourable site and stand conditions of its development. On the other hand, its current diameter increment and height over the last period (1.7 mm, and 0.03 m respectively) indicate that the tree was in the phase of physiological dying. 10 species of fungi were identified on the tree (facultative parasites or saprophytes), the most significant being Armillaria mellea and Aurantioporus fissilis, which caused central heartwood decay. Other fungi developed saprophytically in the dead part of the stem or in dead branches. Eight insect species (secondary and tertiary pests) were identified, including the two most dangerous elm beetles (Scolytus scolytus and S. multistriatus). Together with the species Saperda punctata and Cerambyx scopolii, they accelerated the dying process of twigs and branches, as well as of the whole tree. Ambrosia beetle Xyleborus monographus infested the stem and the large dead branches and caused minor technical damage in wood. The species Dorcus paralelopipedus, Oryctes nasicornis and Valgus hemipterus supported the faster progress of wood-rotting fungi and thus contributed to physiological weakening and shortened the life cycle of the study elm tree.
Sustainable forest management in Serbia - state and potentials Medarevic, M., Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet; Bankovic, S., Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet; Sljukic, B., Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet
Glasnik Sumarskog fakulteta - Univerzitet u Beogradu (1987),
(2008)
97
Journal Article
Recenzirano
Odprti dostop
Starting from the internationally adopted definition of sustainable forest management, this paper points to the demands of sustainable forest management that can be satisfied by meeting the definite ...assumptions. The first part presents the objectives of forest and woodland management planning and utilization, hunting management, and protection of protected areas, as well as the all-inclusive compatible goals of forest policy in Serbia. The second part presents the analysis of the present state of forests in Serbia, in relation to the Pan-European criteria for the assessment of sustainability, and the potentials of our forests to meet all the demands.
The growing stock of the Republic of Serbia: state and problems Bankovic, S., Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet; Medarevic, M., Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet; Pantic, D., Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet ...
Glasnik Sumarskog fakulteta - Univerzitet u Beogradu (1987),
(2009)
100
Journal Article
Recenzirano
Odprti dostop
This paper presents the basic characteristics of forest ecosystems in Serbia by different qualitative and quantitative parameters. The following parameters were dealt with: land use, forest ...ownership, origin, naturalness, preservation status, mixture and structural form of forests, percentage of tree species, stand category, volume distribution by diameter degrees, as well as the quantity of dead wood and carbon stock in the forests of Serbia.
Form of Turkey oak tree stems in coppice forests of Fruska Gora [Serbia] Bankovic, S.,Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet; Medarevic, M.,Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet; Pantic, D.,Univerzitet u Beogradu, Beograd (Serbia). Sumarski fakultet
Glasnik Sumarskog fakulteta - Univerzitet u Beogradu (1987),
(2007)
95
Journal Article
Recenzirano
Odprti dostop
The study of tree stem form-form factors and form quotients, and their dependence, and the relation with other elements is a necessary precondition for the construction of volume tables by indirect ...methods, which are increasingly applied. After determining the magnitudes of the above indicators of tree stem form, this paper studies the correlation between normal form quotients and normal form factor, then the correlation between normal form factor and tree diameter and height, as well as the correlation of normal and artificial form factor.
The study of tree form - form factors and form quotients and their interrelationship and the relation with other elements of volume is a necessary precondition for the construction of volume tables ...by the increasingly applied indirect methods. After the magnitudes of these parameters of tree form were defined, we studied the correlation between normal form quotients and normal form factor, between normal form factor and tree diameter and height, and between normal form factor and artificial form factor.
This paper studies the dependence between volume increment percentage in the stands of fir, spruce, Austrian pine and Scots pine in Serbia (Yugoslavia), on the one hand, and the number of trees per ...hectare, diameter of mean stand tree per cross section, height of mean stand tree per cross section and the share of tree species in the mixture, on the other hand. For each tree species 4 regression models were tested, and based on the relevant statistical parameters and the accuracy of the tables of volume increment percentage, the models for the determination of volume increment percentage were selected for the above species in Serbia (Yugoslavia). In this way, the practical use of the increment percentage method for the determination of current volume increment in the stand was made easier and more economical compared to other methods.
The effect of information reliability referring to the growing stock area and the height of the timber inventory on forest management plans, primarily on forest harvesting plans was analysed. It was ...concluded that any improvization in practical works on forest management causes the unreliable information base, which produces the unreal and inadequate forest management plans. In such situations, disregarding the financial costs, the revision of plan documents must be made. In the opposite case, the realization of plans based on the wrongly assessed forest state results in considerably more complex consequences. Their improvement, if at all possible, during a long time period, requires the engagement of a considerably greater professional and financial potential.
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