Template-Type: ReDIF-Article 1.0 Author-Name: R. Novotný Author-Workplace-Name: Forestry and Game Management Research Institute, Strnady, Jíloviště, Czech Republic Author-Name: D. Černý Author-Workplace-Name: Šumava National Park and Protected Landscape Area, Department of Forest Ecology, Vimperk, Czech Republic Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences in Prague, Czech Republic Author-Name: V. Šrámek Author-Workplace-Name: Forestry and Game Management Research Institute, Strnady, Jíloviště, Czech Republic Title: Nutrition of silver fir (Abies alba Mill) growing at the upper limit of its occurrence in the Šumava National Park and Protected Landscape Area Abstract: In the second half of 20th century silver fir regeneration has been observed throughout all of the Europe, including the Czech Republic. The Bohemian Forest - Šumava Mts. is one of the regions where the silver fir percentage in forest stands is supposed to be increased from the present 2% to nearly 12%. During the period 2006-2007, in the Czech part of the Bohemian Forest, samples of silver fir were taken mainly in the upper altitudinal limit of silver fir occurrence. In the present paper the results of performed analyses are compared with similar surveys conducted in the other European regions. Samples from the Bohemian Forest, in contrast to other results, differ in higher phosphorus content and lower contents of calcium and manganese. Nitrogen content is slightly higher. Our values for the other elements (magnesium, potassium, zinc, sulphur) are comparable to those reported in Poland and Slovakia. In Germany, aside from the above mentioned differences, higher magnesium content was also found within the locality sampled. Keywords: Abies alba, silver fir nutrition, Šumava National Park and Protected Landscape Area, upper limit of occurrence Journal: Journal of Forest Science Pages: 381-388 Volume: 56 Issue: 9 Year: 2010 DOI: 10.17221/87/2009-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/87/2009-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201009-0001.txt Handle: RePEc:caa:jnljfs:v:56:y:2010:i:9:id:87-2009-JFS Template-Type: ReDIF-Article 1.0 Author-Name: P. Kolářová Author-Workplace-Name: Forestry and Game Management Research Institute, Strnady, Kunovice Research Station, Kunovice, Czech Republic Author-Name: L. Bezděčková Author-Workplace-Name: Forestry and Game Management Research Institute, Strnady, Kunovice Research Station, Kunovice, Czech Republic Author-Name: Z. Procházková Author-Workplace-Name: Forestry and Game Management Research Institute, Strnady, Kunovice Research Station, Kunovice, Czech Republic Title: Effect of gibberellic acid and ethephon on the germination of European beech dormant and chilled beechnuts Abstract: The effect of ethephon (80, 100 and 120 mg.l-1) and gibberellic acid (GA3) (40, 300 and 1,000 mg.l-1) on the germination capacity (GC) and mean germination time (MGT) of European beech (Fagus sylvatica [L.]) dormant beechnuts or beechnuts pre-chilled for four weeks was determined. Compared to the control (dormant untreated seeds) or beechnuts treated with tap water no significant increase in mean GC was detected after the application of ethephon or GA3 to dormant seeds. Conversely, both ethephon and GA3 treatments reduced (ethephon significantly) GC when applied to beechnuts chilled for four weeks prior to treatment. The effect of the treatments on germination speed (MGT) and dormancy release significantly improved when beechnuts were chilled for four weeks prior to the application of ethephon or GA3. However, the effect of GA3 on MGT of chilled beechnuts was not so distinct compared to dormant untreated seeds. Reduction in MGT was most obvious in seeds hydrated with 1,000 mg.l-1 GA3 prior to germination. Their cold requirement time was reduced by three weeks compared to beechnuts hydrated in tap water. Keywords: ethephon, Fagus sylvatica, germination, gibberellic acid Journal: Journal of Forest Science Pages: 389-396 Volume: 56 Issue: 9 Year: 2010 DOI: 10.17221/32/2010-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/32/2010-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201009-0002.txt Handle: RePEc:caa:jnljfs:v:56:y:2010:i:9:id:32-2010-JFS Template-Type: ReDIF-Article 1.0 Author-Name: K. Merganičová Author-Workplace-Name: Department of Forest Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Workplace-Name: Forest Research, Inventory and Monitoring Author-Name: J. Merganič Author-Workplace-Name: Department of Forest Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Workplace-Name: Forest Research, Inventory and Monitoring Title: Coarse woody debris carbon stocks in natural spruce forests of Babia hora Abstract: Although coarse woody debris (CWD) represents one of the major carbon pools in natural forest ecosystems, little information is available about its CWD carbon stocks. This study demonstrates the importance of proper estimation of carbon stocks in CWD, which accounts for the decay process of CWD, on an example of a natural mountainous spruce forest located in Central Europe. The study accounts for aboveground coarse woody debris including standing dead trees, lying deadwood, and naturally formed stumps. Basic mensurational information (diameter, height, decay class) about dead wood was collected in the field during the inventory of the forests of the nature reserve Babia hora. The data were used for the calculation of CWD timber volume. In the next step, CWD timber volume was converted to carbon stock using the carbon proportion of 50.1% and density values of decay classes derived from the information published elsewhere. The analysis revealed that when CWD timber volume was converted to carbon stocks using the basic wood density of fresh wood, C stocks were overestimated by 40% or more depending on the developmental stage and elevation. The results also revealed that as the elevation increases, CWD carbon stocks decrease and the differences between the developmental stages diminish. Keywords: Babia hora nature reserve, deadwood, decay, elevation, natural forest, wood density Journal: Journal of Forest Science Pages: 397-405 Volume: 56 Issue: 9 Year: 2010 DOI: 10.17221/11/2010-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11/2010-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201009-0003.txt Handle: RePEc:caa:jnljfs:v:56:y:2010:i:9:id:11-2010-JFS Template-Type: ReDIF-Article 1.0 Author-Name: L. Dobrovolný Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: V. Tesař Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Growth and characteristics of old beech (Fagus sylvatica L.) trees individually dispersed in spruce monocultures-- Abstract: We studied old beech trees individually dispersed in spruce monocultures after having found wildlings in their vicinity. The goal was to define stem and crown dimensions of the trees in dependence on their position in the primary spruce stand and to find out what kind of development they went through before reaching the current condition. We made an inventory of 883 trees in about 800 ha of stands growing in the fir-beech forest altitudinal zone (FAZ). A detailed biometric analysis conducted on two research plots of a total area 19 ha included 110 trees. Their age is 140-180 years as indicated by the analysis of annual rings. Thus, they grow in the second generation of the spruce stand. The fact gives them an absolute competitive advantage, which can be documented by their size (dbh = 49-93 cm as compared with the spruce = 15-66 cm, crown width 8-17 m as compared with the spruce = 1-10 m) as well as by the relation of their disposable (ADISP) and social (ASOC) areas to the size of horizontal crown projection. Regarding the size, the good condition of the crown and the expected recurrent fructification, we can consider these trees suitable for use in the systematic conversion of spruce monocultures into mixed forests for a long time. Keywords: beech, old trees, interspersed trees, tree size, tree crown, competition, regeneration, spruce monoculture Journal: Journal of Forest Science Pages: 406-416 Volume: 56 Issue: 9 Year: 2010 DOI: 10.17221/19/2010-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/19/2010-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201009-0004.txt Handle: RePEc:caa:jnljfs:v:56:y:2010:i:9:id:19-2010-JFS Template-Type: ReDIF-Article 1.0 Author-Name: M. Švestka Title: Changes in the abundance of Melolontha hippocastani Fabr. and Melolontha melolontha (L.) (Coleoptera: Scarabeidae) in the Czech Republic in the period 2003-2009 Abstract: In the period between 2003 and 2009 we evaluated the abundance of adults of Melolontha hippocastani Fabr. and Melolontha melolontha (L.) cockchafers in four forest regions of the Czech Republic. During this period each of the evaluated localities was hit twice by heavy swarming. The course of swarming, species composition, abundance of the respective tribe, sex ratio during swarming and the correlation between the course of swarming and average daily temperature were monitored by means of a light trap, an automatic meteorological station and observations in the open space; the data were represented in the form of graphs. We evaluated how the trend of the abundance of the particular species developed in the respective localities in order to work out a more specific prediction of the occurrence of the cockchafer in subsequent years and the extent of damage caused by the grubs to forest plantations. Research will continue in 2010-2011. Keywords: abundance, light trap, Melolontha hippocastani Fabr., Melolontha melolontha (L.), sex ratio Journal: Journal of Forest Science Pages: 417-428 Volume: 56 Issue: 9 Year: 2010 DOI: 10.17221/109/2009-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/109/2009-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201009-0005.txt Handle: RePEc:caa:jnljfs:v:56:y:2010:i:9:id:109-2009-JFS