Template-Type: ReDIF-Article 1.0 Author-Name: A. Jaworski Author-Workplace-Name: Faculty of Forestry, Department of Silviculture, Agricultural University, Cracow, Poland Author-Name: Z. Kołodziej Author-Workplace-Name: Faculty of Forestry, Department of Silviculture, Agricultural University, Cracow, Poland Title: Beech (Fagus sylvatica L.) forests of a selection structure in the Bieszczady Mountains (southeastern Poland) Abstract: The characteristics of two beech (Fagus sylvatica L.) stands are presented in this paper. One, the Tarnicki stand, situated in the Bieszczadzki National Park, represents the growing up stage and selection phase of a forest of primeval character. The other one, the Otryt stand, is situated in managed forests of the Lutowiska Forest District. In each stand two sample plots were established. The distribution of the number of trees in each sample plot agreed with de Liocourt sequence and Meyer curve. Both stands were characterized by the structure of many generations. The Otryt stand, with respective volumes of 238 and 324 m3/hain two sample plots, was characterized by a lack of large diameter trees and a high percent of trees of the smallest diameters, while the Tarnicki stand, with volumes of 442 and 517 m3/ha, was characterized by the presence of large diameter trees (d1.3 ≥ 72 cm). The phase of the selection forest in the Tarnicki stand is of temporary character because, due to natural processes, a two-storied structure may develop there, and with time, a one-storied structure in the optimal stage. In the Otryt stand, representing a managed forest, the maintenance of the selection structure may be expected due to selection cuttings. It has to be acknowledged that managed stands of characteristics similar to those presented in this paper makes it possible to carry out selection cutting, especially in the protection zone surrounding the Bieszczadzki National Park. Keywords: selection forest, primeval forest, development stages, Liocourt and Mayer distributions Journal: Journal of Forest Science Pages: 301-312 Volume: 50 Issue: 7 Year: 2004 DOI: 10.17221/4627-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4627-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200407-0001.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:7:id:4627-JFS Template-Type: ReDIF-Article 1.0 Author-Name: G. Maresi Author-Workplace-Name: U. O. Foreste, D.R.N.A., Istituto Agrario di S. Michele all'Adige (IASMA), Trento, Italy Author-Name: P. Capretti Author-Workplace-Name: U. O. Foreste, D.R.N.A., Istituto Agrario di S. Michele all'Adige (IASMA), Trento, Italy Author-Name: P. Ambrosi Author-Workplace-Name: U. O. Foreste, D.R.N.A., Istituto Agrario di S. Michele all'Adige (IASMA), Trento, Italy Author-Name: S. Minerbi Author-Workplace-Name: U. O. Foreste, D.R.N.A., Istituto Agrario di S. Michele all'Adige (IASMA), Trento, Italy Title: Larch crown diseases in Trentino and South Tyrol Abstract: Various attacks of pathogenic fungi on the larch crown were observed in Trentino/South Tyrol, Italy, over the past few years. In 1999, severe defoliation was caused by Mycosphaerella laricina, a rarely investigated pathogen, whose action was enhanced by high temperatures and humidity in August. In July 2000, larch woods showed crown yellowing due to Meria laricis. Lower temperatures and heavy precipitation were probably the predisposing factors in this case. Hypodermella laricis was observed in 2002 as a localised attack, while Lachnellula wilkommii is commonly recorded. The impact of these diseases and the environmental factors involved in their occurrence are discussed in this paper. Keywords: Larix decidua, Mycosphaerella laricina, Meria laricis, Hypodermella laricis, Lachnellula wilkommii Journal: Journal of Forest Science Pages: 313-318 Volume: 50 Issue: 7 Year: 2004 DOI: 10.17221/4628-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4628-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200407-0002.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:7:id:4628-JFS Template-Type: ReDIF-Article 1.0 Author-Name: L. Jankovský Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: M. Bednářová Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: D. Palovčíková Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Dothistroma needle blight Mycosphaerella pini E. Rostrup, a new quarantine pathogen of pines in the CR Abstract: Dothistroma needle blight caused by Mycosphaerella pini E. Rostrup was observed for the first time in the Czech Republic on an imported Pinus nigra Arnold in 1999. In 2000, it was also found in the open planting. During three years, it became an important pathogen of pines in the Czech Republic. Its occurrence was noticed in more than 50 localities, above all in the region of Moravia and Silesia and eastern Bohemia. In total, it was found on 10 species of pine (P. nigra Arnold, P. banksiana Lamb., P. contorta Loudon, P. mugo Turra, P. leucodermis Ant., P. sylvestris L., P. cembra L., P. aristata Engelm., P. ponderosa P. et C. Lawson and P. jeffreyi Grev. et Balf.). Also Picea pungens Engelm. was noticed as a host species. In the Czech Republic, Pinus nigra is the most frequent host species of M. pini (80% localities) followed by Pinus mugo (27% localities). On Scots pine P. sylvestris, M. pini was noticed at two localities. The critical period for infection is in the Czech Republic from the second half of May until the end of June. The incubation period lasts about 2-4 months depending on climatic conditions. The first symptoms on the needles infected in the current year appear in August being clearly expressed from September to November.In the CR, Dothistroma needle blight spread probably with infected planting stock obtained from import at the end of the 80s and at the beginning of the 90s. Keywords: Dothistroma needle blight, Mycosphaerella pini, Dothistroma septospora, Pinus, needle cast, quarantine pests, Picea pungens Journal: Journal of Forest Science Pages: 319-326 Volume: 50 Issue: 7 Year: 2004 DOI: 10.17221/4629-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4629-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200407-0003.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:7:id:4629-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Sequens Author-Workplace-Name: Faculty of Forestry and Environment, Czech University of Agriculture, Prague, Czech Republic Author-Name: M. Křepela Author-Workplace-Name: Faculty of Forestry and Environment, Czech University of Agriculture, Prague, Czech Republic Author-Name: D. Zahradník Author-Workplace-Name: Faculty of Forestry and Environment, Czech University of Agriculture, Prague, Czech Republic Title: Changes in trends of the height growth of spruce and pine derived from continuous measurements in forest management plans of Kostelec nad Černými lesy and on pilot research plots in the Czech Republic Abstract: In changing growth conditions, methodical procedures should concentrate on the investigation of processes currently under way in forests. Many studies have shown that present models of forest growth parameters differ from previous surveys as far as for instance the height is concerned. Causes of these phenomena have not been satisfactorily explained although various hypotheses are investigated. In our study, we present partial results of the investigation of height growth within a sixty-five-year period, based on the analysis of data obtained from seven forest management plans in the management-plan area of Kostelec nad Černými lesy (Kostelec n. Č. l.) and continuous measurements on pilot research plots in the period of 1965-1994. The comparison of mean height growth curves obtained by the curve fitting of the values of empirical data signifies by their different course and increasing kurtosis a dependence on the calendar year when the measure was taken. It signifies an increasing height growth trend of both species in the given area. Keywords: spruce, pine, mean stand height, height growth trends, current and mean height increment, stand age, year, forest vegetation zones, forest management plan (FMP), pilot research plots (PRP) Journal: Journal of Forest Science Pages: 327-337 Volume: 50 Issue: 7 Year: 2004 DOI: 10.17221/4630-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4630-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200407-0004.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:7:id:4630-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Klečka Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Early stadiums of floodplain forest succession in a wide river beds upon an example of Bečva Abstract: In the years 1999-2001 early stadiums of succession development of a floodplain forest were monitored in the wide bed of the Bečva River formed during the floods in 1997. Changing site conditions were investigated and the vegetation of pebble beds was repeatedly mapped in detail. In dependence on the site conditions main types of biotopes were described. The vegetation data were evaluated in accordance with the life form and ecological claims of the identified species. The results indicated an increasing differentiation of the originally relatively homogeneous environment owing to fluvial processes and progress of vegetation. Generally hemicryptophytes and hemiheliophytes were thriving above all, the dominance of Phalaris arundinacea was still growing. As for the woody species, especially willows asserted themselves from the beginning, solitarily and weaker in vitality representatives of other genera were present at drier sites. The identified specimen of Myricaria germanica was probably planted artificially. As concerns neophytes, only Reynoutria japonica was spreading significantly but in a very uneven way. Generally, this development of similar communities only little documented in this region corresponds to STG Saliceta fragilis inf. Keywords: succession, floods, pebble beds, Myricaria, Salix Journal: Journal of Forest Science Pages: 338-352 Volume: 50 Issue: 7 Year: 2004 DOI: 10.17221/4631-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4631-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200407-0005.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:7:id:4631-JFS