broj: 5-6/2009
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| RIJEČ GLAVNOGA UREDNIKA | ||
| Branimir Prpić | ||
| HOW TO SECURE THE FUTURE OF YOUNG, NATURALLY MANAGED FORESTS IN CROATIA DURING RECESSION pdf HR EN | 236 | |
| IZVORNI ZNANSTVENI ČLANCI | ||
| Tikvić, I., Ž. Zečić, D. Ugarković, D. Posarić | UDK 630* 429 + 851 (001) | |
| Damage of Forest Trees and Quality of Timber Assortmets of Pedunculate Oak on Spačva Area pdf HR EN | 237 | |
| Summary: Management with forests of pedunculate oak, the principal commercial tree species in Croatia, is burdened with increasing instances of tree decline and dieback. A combination of factors, such as decreased height and diameter increment, lower value of wood assortments, disturbances in planning and management and rising management costs, have made this the most important management and ecological problem in Croatian forestry. Tree decline is a gradual, continuous, or in some cases, rapid loss of tree vitality. In forestry, tree decline is assessed on the basis of the exterior appearance of a tree, i.e. on the basis of tree damage assessment. Tree damage relates to crown, stem and root damage. Crown damage assessment is based on crown defoliation and changes in leaf colour. Tree dieback is sudden death of trees due to diseases or a complex action of adverse factors. It can often stem from a continuous decline of trees and a disturbed stability of forest ecosystems. In Croatia, the most severely affected tree species are the two principal ones: pedunculate oak and silver fir. Tree decline and dieback incur high financial losses, amounting to as much as 40 % of the potential market value of forest assortments. However, a decrease in non-market forest functions is much more serious. The economic consequences of tree decline are reflected on the quality and lower value of wood assortments. Dieback of pedunculate oak trees leads to sapwood degradation and a decrease in assortment diameter, which may amount to as much as 33 % of the diameter. The goal of research was to determine the impact of pedunculate oak damage on the structure and volume of wood assortments. Research was conducted on tree samples from four management units in Vinkovci ForestAdministration, along the Županja - Lipovac road. Wood volume utilization of dead and differently damaged trees of pedunculate oak was analyzed. Tree crowns along the Županja - Lipovac road were found to be more defoliated compared to those in the “Spačva basin” area. Crown defoliation of pedunculate oak was about 60 %, which indicates decreased tree vitality. Severely defoliated and dead trees manifested significantly higher biotic damage in relation to slightly and moderately defoliated trees. The percentage share of veneer logs and class I logs, as well as stacked wood, was higher in trees with the first and second defoliation class. The share of lower class logs (II and III class), as well as the percentage share of waste was higher in trees with higher defoliation classes. Of the total wood volume, there were 20 % of veneer logs in defoliation classes 1 and 2 (slight and moderate defoliation), and 10 % of veneer logs in defoliation classes 3 and 4 (severe defoliation). According to the percentage share of assortments in the total technical roundwood, there were 37 % of veneer logs in trees with defoliation classes 1 and 2, and 18 % of veneer logs in defoliation classes 3 and 4. The proportion of lower-class technical assortments was higher in higher classes of crown defoliation. The proportion of second class logs in defoliation classes 1 and 2 was 11 %, and in defoliation classes 3 and 4 it was 19 %. The proportion of third class logs in defoliation classes 1 and 2 was 15 %, while in defoliation classes 3 and 4 it reached 19%. There was more waste in defoliation classes 3 and 4 (30 %), and slightly less in defoliation classes 1 and 2 (27 %). Tree damage lowers the quality of logs and lessens the income from pedunculate oak management. Tree damage assessment may reduce the amount of snags and increase management yields. Timely and appropriate tree damage assessments have a positive effect on overall management with pedunculate oak. The selection of damaged trees for felling is a key factor that ensures the quality of the wood matter in disturbed and unstable forest ecosystems. Key words: damage trees; pedunculate oak; timber quality; utilization | ||
| Trinajstić, I., Z. Cerovečki | UDK 630* 188 (001) | |
| Festuco drymeiae-Fagetum Magic 1978 Association (Aremonio-Fagion) in the Vegetation of Northwest of Croatia pdf HR EN | 249 | |
| Roth, V., T. Dubravac, I. Pilaš, S. Dekanić, Z. Brekalo | UDK 630* 232.3 (001) | |
| Acorn Size of Pedunculate Oak (Quercus robur L.) and Sessile Oak (Quercus petraea Liebl.) as a Factor in Growth and Development of Seedlings pdf HR EN | 257 | |
| Jakovljević, T., K. Berković, G. Tartari, B. Vrbek, J. Vorkapić-Furač | UDK 630* 425 (001) | |
| Atmospheric Deposition in Forest Ecosystem of Europe and Research of New Methods for Determination of Phosphorus and Ammonia Within a Framework of ICP Forests pdf HR EN | 267 | |
| Degmečić, D., K. Krapinec, T. Florijančić | UDK 630* 156 (001) | |
| Factors that Determine Sex of Red Deer Calves (Cervus elaphus L.): Verification of Current Knowledge pdf HR EN | 279 | |
| Potočić, N., I. Seletković, M. Čater, T. Ćosić, M. Šango, M. Vedriš | UDK 630* 232.3 + 422 | |
| Ecophysiological Response of Sun-Exposed Common Beech (Fagus Sylvatica L.) Seedlings under Different Fertilization Levels pdf HR EN | 289 | |
| Rosavec, R., D. Dominko, D. Barčić, D. Starešinić, Ž. Španjol, K. Biljaković, M. Ožura, N. Marković, D. Bognolo | UDK 630* 432.1 (001) | |
| Analysis of Distribution of Areas Affected by Forest Fires on Island of Brač, Island of Korčula and Island of Rab pdf HR EN | 301 | |
| PRETHODNO PRIOPĆENJE | ||
| Perić, S., J. Medak, I. Pilaš, B. Vrbek, M. Tijardović | UDK 630* 413 + 232 | |
| Initial Research Results of the Possibility of Revitalizing Očura II Querry with Autochthonous Tree and Shrub Species pdf HR EN | 309 | |
| PREGLEDNI ČLANCI | ||
| Konjević, D., U. Kierdorf, V. Njemirovskij, Z. Janicki, A. Slavica, K. Severin | UDK 630* 132 | |
| Wild Boar Tusk Pathology: An Overview of the Current Knowledge and Models of Reparation pdf HR EN | 319 | |
| STRUČNI ČLANCI | ||
| Frković, Alojzije | UDK 630* 156 | |
| The First Hunting Textbook of Bosnia and Herzegovina pdf HR EN | 327 | |