broj: 9-10/2003
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| IZVORNI ZNANSTVENI ČLANCI | ||
| Idžojtić, M. | UDK 630* 442 (001) | |
| Hosts and Distribution of the White-berried Mistletoe (Viscum album L. ssp. album) in Croatia pdf HR EN | 439 | |
| Krejči, V., Dubravac, T. | UDK 630* 231 + 226 (001) | |
| Possibility and Justification of the Shelterwood Cutting Method in the Beech Forests of Gorski Kotar, Lika and Hrvatsko Primorje pdf HR EN | 449 | |
| Klobučar, D. | UDK 630* 583 + 585 (001) | |
| Assessment of the Accuracy of Geocoding the Basic Map of Croatia and the Digital Orthophotography pdf HR EN | 457 | |
| PRETHODNO PRIOPĆENJE | ||
| Prka, M. | UDK 630* 443 + 323 + 325 | |
| Occurrence of False Heartwood in Beech Trees and Technical Beech Roundwood Coming from Thinning and Preparatory Fellings in the Area of Bjelovar Bilogora pdf HR EN | 467 | |
| Summary: The subject of research were the frequency and scope of the occurrence of false heartwood in beech roundwood coming from thinning and preparatory felling in the economic unit Bjelovar Bilogora. Research was carried out on 15 felling sites and 835 exemplary trees, 573 of the trees coming from 11 instances of thinning felling, aged between 50 and 91 years, and 262 exemplary trees from 4 instances of preparatory felling, aged between 100 and 110 years. Appearance of false heartwood in trees was researched with regard to the type of felling and age of trees, number of trees with false heartwood, according to diameter class for thinning and preparatory felling, as well as the percentage of false heartwood volume in the volume of technical roundwood with false heartwood in thinning and preparatory felling. False heartwood of beech trees was not found in thinning felling up to 50 years of age. In thinning felling of trees of approximately 60 years of age, false heartwood appears in less than 4 % of the trees, while in thinning felling of trees aged between 70 and 90 years, it occurred in about 15 % of the trees. In preparatory felling (main yield), aged between 100 and 110 years, the percentage of trees with false heartwood is considerably higher, and its value stands at about 50 %. A smaller number of trees with false heartwood, according to the diameter class, were found in previous yield felling, aged between 50 and 91 years, than in preparatory felling, aged between 100 and 110 years. Percentage of false heartwood in the volume of technical roundwood with false heartwood amounts to 1,5 % for the thinning felling aged up to 60 years, while for the thinning felling aged between 70 and 90 years, the percentage ranges between 4,9 % and 17,9 %. In preparatory felling, percentage of false heartwood in the technical roundwood is fairly unchangeable, and it varies between 6 % and 8,8 %, or 7,6 % on average. Percentage values of false heartwood in the volume of technical roundwood decrease whit the increase of diameter class, i. e. with the breast diameter of the tree. In planning the assortment structure of previous yield, occurrence of false heartwood does not have major significance, since we can expect up to 15 % of trees with false heartwood in older thinning felling. On the other hand, while planning assortment structure of preparatory felling, i. e. main yield, the frequency of the occurrence of false heartwood has a great significance, since we can expect it in approximately 50 % of marked trees. Key words: false beech heartwood; beech felling; assortment structure | ||
| STRUČNI ČLANCI | ||
| Margaletić, J., Margaletić, M. | UDK 630* 435 + 432 | |
| Fires in Forests and Forestlands as Habitat Degradation Factors pdf HR EN | 475 | |
| Sabadi, R. | UDK 630* 904 | |
| German Forestry in 2002/2003 pdf HR EN | 483 | |
| Tolić, I. | UDK 630* 164 + 160 + 261 | |
| Commercial and other Values of the Genus Pistacia Species pdf HR EN | 501 | |