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Znanstveno-stručno i staleško glasilo
Hrvatskoga šumarskoga društva
Journal of Forestry Society of Croatia
      Prvi puta izašao 1877. godine i neprekidno izlazi do današnjeg dana
   ISSN No.: 0373-1332              UDC 630* https://doi.org/10.31298/sl
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ARHIVA ČASOPISA


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RIJEČ GLAVNOGA UREDNIKA
     
Branimir Prpić
FORESTS MANAGED ON CLOSE-TO-NATURE PRINCIPLES ARE MUCH MORE USEFUL THAN VIRGIN FORESTS     pdf     HR     EN 1
 
IZVORNI ZNANSTVENI ČLANCI
     
Topić, V., L. Butorac, G. Jelić UDK 630* 222 + 539 Arbutus unedo L. (001)
Biomass in Strawberry Tree Coppice Forests (Arbutus unedo L.) on Island Brač     pdf     HR     EN 5
Prka, M., T. Poršinsky UDK 630* 525 + 526 (001)
Structure Comparison of Technical Roundwood in Even-Aged Beech Cutblocks by Assortment Tables with Application of Standards HRN (1995) and HRN EN 1316-1:1999     pdf     HR     EN 15
Summary: This paper deals with research and comparison of technical roundwood structure in assortment tables compiled in accordance with the requirements of the Croatian standards for forest harvesting products of 1995 and the Croatian Standard Hardwood round wood - Qualitative classification - Part 1: Oak and Beech HRN EN 1316-1:1999. The research was carried out in the Management Unit "Bjelovarska Bilogora", Forest Office Bjelovar, Forest Administration Bjelovar. All investigated compartments pertain to ecological management type II-D-11 and management class BEECH with a 100-year rotation. The age of the investigated cutblocks ranged between 59 and 91 with thinning, between 94 and 110 with preparatory cut, between 100 and 112 with seed cut and between 98 and 114 with final cut. The group of sample trees was formed by random selection of approximately 10% of marked trees. The sample for compiling assortment tables in accordance with the requirements of the Croatian standards for forest harvesting products of 1995 involved 3001 sample trees (table 1), and assortment tables were compiled in accordance with the requirements of the Croatian standard HRN EN 1316-1:1999 based on 3082 sample trees (table 2). Share tables of wood assortments determined in accordance with these two standards were developed, for various reasons, separately for thinnings and preparatory felling, and separately for seeding and final felling. By processing sample trees in accordance with the requirements of the Croatian Standards for Forest Harvesting Products of 1995, 10,098 pieces of technical roundwood were obtained, whose total volume was 4,337 m3 (without bark). In accordance with the requirements of this Standard, total processed and classified net volume of all sample trees was 7,469 m3. By bucking sample trees in accordance with the requirements of the Croatian Standard Hardwood round wood - Qualitative classification - Part 1: Oak and Beech HRN EN 1316-1:1999, 13,507 pieces of technical roundwood were obtained, whose total volume was 6,010 m3 (without bark), and in accordance with the requirements of this Standard, the net volume of all sample trees was 8,931 m3. Due to substantial differences, structural comparison of technical roundwood classified in accordance with the requirements of these two standards is more simple and adequate for wood assortments of the best quality, veneer logs - A quality class (Fig. 1) and assortments of the lowest quality class, 3rd class sawlogs - D quality class (Fig. 4). The comparison is much more difficult with other quality classes of technical roundwood, logs for rotary cutting - 1st quality class sawlogs - B quality class (Fig. 2), 2nd class sawlogs - C quality class (Fig. 3), due to even more significant differences between standard requirements with respect to dimensions, range of timber defects, and number of quality classes. Differences between the Croatian standards for forest harvesting products (1995), still applied in Croatian forestry and international standards Hardwood round wood - Qualitative classification - Part 1: Oak and Beech EN 1316-1:1999 are numerous and significant. Differences are related to the number of quality class, prescribed minimum dimensions, range of roundwood defects along with way of measurement of technical roundwood and they reflect to different share of wood assortments (quality classes) determined in accordance with the requirements of individual standards. However, the key difference between these two standards lies in the fact that according to the "old" Croatian standards technical roundwood was classified by purpose, and according to the "new" Croatian standards technical roundwood is classified by quality, therefore avoiding to define its future purpose. Consequently, the comparison of percentage shares of wood assortments in the assortment tables is difficult, and defining unambiguous conclusions (except for assortments of technical roundwood of the highest and lowest quality) is questionable. Differences in contents between international standards and standards currently in use in Croatian forestry shall necessarily bring operational changes in bucking, scaling, classifying and marketing of forest products. Operational changes (partly conditioned by the acceptance of international laws and regulations) shall also be accompanied by certain changes in relationships within the forestry sector. Key words: assortment tables, Croatian standards of forest harvesting products 1995, Croatian Standard HRN EN 1316-1:1999, even-aged beech stands
Zečić, Ž., I. Stankić, D. Vusić, A. Bosner, D. Jakšić UDK 630* 48 + 737 (001)
Volume utilization and value of timber assortmets of dried silver fir (Abies alba Mill.) trees     pdf     HR     EN 27
Horvat, Gabrijel UDK 630* 689 (001)
Improvement of Forestry Office Business Operation by Developing Basic Managing Functions     pdf     HR     EN 39
 
PREGLEDNI ČLANCI
     
Dakskobler, Igor UDK 630* 188
Phytocoenological Research in Forest Ecosystems at the Beginning of the 21st Century     pdf     HR     EN 53
Jurjević, P., D. Vuletić, J. Gračan, G. Seletković UDK 630* 439
Forest Fires in the Republic of Croatia (1992-2007)     pdf     HR     EN 63
 
KNJIGE I ČASOPISI
     
Franjić, J., Ž. Škvorc
Plant Communitties of Croatia     PDF 88

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