Based on the data of the National Forest Inventory, 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. The analysis of the presented state enables the definition of some of strategic problems which individually and acting together burden our forest ecosystems, and whose detailed elaboration, measures and methods of enhancement will be fully expressed in the highest planning document - National Forest Programme. A special section, but without being sufficiently analytical, presents the main data on the growing stock of the Autonomous Province Kosovo and Metohija taken from the Report of the Norwegian Forestry Group
Based on the presented study results, it can be concluded that the distribution of tree numbers per diameter degrees (diameter structure) in the four measurements of the compartments 51 and 75, did not change. It was also concluded that one functional dependence could be applied for both compartments N=e5,9·e–0,39*d The result of the above is that also in the following measurements, the diameter structure will remain unchanged, in cases of the same or similar selection cuttings both by the scope and by the distribution of felled trees per diameter classes The primary objective of this type of study is to predict, based on a mathematical model of diameter structure development, effect of the scope of selection cuttings and the number of recruitments on the diameter structure, and the simulation of growth, the distribution of trees per diameter classes in the following measurement or measurements, i.e. to foresee the future development of selection stands
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 Goc, 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>3 cm) 56.35 m3. 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.
This paper analyzes the determinants upon which the successful management of the rural development of Fruška gora's area is depended, bearing in mind the presence of national park. The specific characteristic of Fruška gora's area has a multiple influences on the choice of optimal model for rural development. For this purpose, the survey was conducted in 2014. in the area of Fruška gora on a sample of 117 interviewees from this area. Statistical methods are used in order to reach conclusions on the basis of data obtained from survey research. The research results show that in this region dominance of agriculture and tourism is present, with unsatisfactory rural infrastructure. Socioeconomic determinants are key disadvantages affecting the management of rural development of Fruška gora's area. The authors conclude that in the future the management model of rural development of Fruška gora's area should focus on the development of organic agriculture and rural tourism on a sustainable basis together with rural investments.
The control method, one of the most reliable methods of selection forest management, has been applied in selection forests of western Serbia in a somewhat modified form (Goc variety) for fifty years. This paper analyzes the effects of the control method, i.e. its Goc variety, in the period from 1960/70 - 2000. It is based on the data of five successive complete inventories of the Forest Management Unit (FMU) 'Tara', whose high selection forest of spruce, fir and beech (Piceo-Abieti-Fagetum subass. typicum) trees on diluvium, brown and illimerised soil on limestone, and on limestone in formation with hornfels, are the best quality and the most spacious forests in the Management Class MC 491/1. The effects were monitored through the changes in the distribution of the number of trees and volume per diameter classes, separately for fir as the protagonist of the selection structure, and collectively at the level of a compartment, a typical representative of MC 491/1. Also, the analysis included the changes in the number of trees, volume, current volume increment, yield, and number of recruited trees per unit area (1 ha) by tree species in MC 491/1, occupying an area of 2,648.78 ha. The study results show that in the study period the average volume in MC 491/1 increased by 18.8%, the percentage of conifers increased from 66.0% to 78.5%, and the bearer of the changes was fir. The volume of the mean fir tree increased by 35.9% and it attained 1.086 m3. The volume increment increased by 15.7%. The selection structure of conifers was satisfactory, but there were problems with beech regeneration, in its stable presence and in its achievement of the targeted structure. The number of trees per unit area (1 ha) decreased, which in the long run could have detrimental consequences, but the sustainability in general was satisfactory. The levels of regeneration and recruitment were satisfactory. The health of the trees was improved; the stands were healthy, vital, and biologically and functionally stable. The study results point not only to a series of positive effects of the several-decades' long implementation of the Goc variety of the control method, but also to some problems, the understanding of which will have a corrective role in the future management of selection forests in western Serbia.
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