Template-Type: ReDIF-Article 1.0 Author-Name: V. Chalupa Author-Workplace-Name: Faculty of Forestry and Environment, Czech University of Agriculture, Prague, Czech Republic Title: In vitro propagation of European larch (Larix decidua Mill.) Abstract: Methods of in vitro propagation of Larix decidua are described in the paper. The influence of explant source, tree age, genotype, composition of nutrient media and phytohormones on in vitro propagation of Larix decidua has been investigated. Needles, isolated vegetative buds, shoot tips, zygotic embryos and cotyledons were used as initial explants. Axillary and adventitious bud cultures were used for fast in vitro shoot multiplication. Root induction was stimulated on low salt medium supplemented with auxin. After rooting and hardening off, micropropagated trees were planted in experimental plots. The growth of micropropagated trees was comparable with the height and diameter growth of trees originated from seeds. Keywords: Larix decidua, in vitro propagation, larch micropropagation, shoot multiplication, root induction, field growth of micropropagated trees Journal: Journal of Forest Science Pages: 553-558 Volume: 50 Issue: 12 Year: 2004 DOI: 10.17221/4656-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4656-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200412-0001.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:12:id:4656-JFS Template-Type: ReDIF-Article 1.0 Author-Name: M. Kulej Author-Workplace-Name: Faculty of Forestry, Department of Forest Tree Breeding, Agricultural University, Cracow, Poland Title: Adaptation of larch (Larix decidua) of Polish provenances under mountainous conditions of Beskid Sądecki (southern Poland) Abstract: A long-term study carried out within the 1967 All-Poland Larch Provenance Experiment investigated genetic variation in 20 Polish provenances of larch growing under the site conditions of the Beskid Sądecki Mts. (at a test site in Krynica). The study was based on the measurements of tree height made in individual larch populations during 1969-1999, i.e. when trees were 5, 8, 11, 15, 20, 25, 30 and 35 years old. The results showed a considerable adaptation stability of the provenances tested at the Krynica site. This stability, however, tended to decrease with increasing mean height of trees. An estimation of the effect of the "genotype (provenance) × years of observation (age)" interaction revealed a high stability of height growth in larch populations having extreme values of this trait. As follows from the study, it is possible, especially in the case of the latter group of provenances, to carry out effective selection in the early stage of tree growth, thus ensuring a permanent genetic gain. Keywords: European larch, provenance, genotype, planting experiment, Beskid Sądecki Mts., Poland Journal: Journal of Forest Science Pages: 559-565 Volume: 50 Issue: 12 Year: 2004 DOI: 10.17221/4657-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4657-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200412-0002.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:12:id:4657-JFS Template-Type: ReDIF-Article 1.0 Author-Name: I. Buchta Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: E. Kula Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: K. Drápela Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Ecological aspects of dispersion of gall mites in the vertical profile of the birch crown Abstract: In stands of birch Betula pendula Roth in the eastern Krušné hory Mts. the occurrence of the gall mites Acalitus rudis Canestrini and Phyllocoptes lionotus Nalepa was studied in terms of their dispersion in the tree crown. Statistical analyses of data on the infestation of birch with gall mites in the height transects of the eastern Krušné hory Mts. were conducted (1995-2001) as well as detailed monitoring of their dispersion on selected heavily infested sample trees. In 1995-2001 the infestation of birch stands of the eastern Krušné hory Mts. increased. The population dynamics of A. rudis revealed important deviations, the abundance of P. lionotus was lower and in terms of time changes it was incidental. Detailed investigations proved that the gall mites favoured leaves formed in the stage of leaf opening in the lower part of the crown. The horizontal distribution of A. rudis in the crown was limited. Keywords: Acalitus rudis, Phyllocoptes lionotus, tree crown dispersion, ecology Journal: Journal of Forest Science Pages: 566-572 Volume: 50 Issue: 12 Year: 2004 DOI: 10.17221/4658-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4658-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200412-0003.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:12:id:4658-JFS Template-Type: ReDIF-Article 1.0 Author-Name: M. Acosta Author-Workplace-Name: Research Centre of Mechanism, Ecophysiology and Biotechnology of Photosynthesis, Institute of Landscape Ecology, Academy of Sciences of the Czech Republic, Brno, Czech Republic Author-Name: D. Janouš Author-Workplace-Name: Research Centre of Mechanism, Ecophysiology and Biotechnology of Photosynthesis, Institute of Landscape Ecology, Academy of Sciences of the Czech Republic, Brno, Czech Republic Author-Name: M.V. Marek Author-Workplace-Name: Research Centre of Mechanism, Ecophysiology and Biotechnology of Photosynthesis, Institute of Landscape Ecology, Academy of Sciences of the Czech Republic, Brno, Czech Republic Title: Soil surface CO2 fluxes in a Norway spruce stand Abstract: The measurements of soil CO2 efflux in a Norway spruce (Picea abies [L.] Karst.) forest stand are reported for a 6-month period (from May 1st to October 26th 1999). Forest floor CO2 efflux was measured at four positions using a portable infra-red gas analyser (LI-COR), operating as a closed dynamic system and connected to a portable soil chamber. Soil CO2 efflux was measured 3-4 times per month. Soil temperature at a depth of 5 cm was recorded during the whole period with an interval of ten minutes. An exponential regression was used to describe the relationship between soil temperature and soil CO2 efflux. On the basis of this relationship Q10 values were calculated. The averaged value of Q10 for the studied Norway spruce forest stand was 3.74. Keywords: Norway spruce, Picea abies, soil CO2 efflux, Q10 Journal: Journal of Forest Science Pages: 573-578 Volume: 50 Issue: 12 Year: 2004 DOI: 10.17221/4659-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4659-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200412-0004.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:12:id:4659-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Holuša Author-Workplace-Name: 2 Author-Name: L. Roller Author-Workplace-Name: 2 Title: Notes to distribution and seasonal activity of spruce diprionids (Hymenoptera: Diprionidae) in the eastern part of the Czech Republic Abstract: A study of diprionids associated with spruce was done at 31 sites of the eastern part of the Czech Republic in 1988-2003. In total 45 specimens belonging to Gilpinia abieticola (6 specimens), G. hercyniae (3) and G. polytoma (36) were collected using Malaise traps, emergency traps, bark-beetle pheromone baited traps or sweeping. The spruce diprionids were recorded in 30% of the studied sites only. G. polytoma was the most abundant and it is probably bivoltine with adult activity from April to August. The results of emergence trap-monitoring in Paskovský les indicate that this species is in latency. Keywords: Gilpinia, Diprionidae, Malaise trap, spruce forests, faunistics, ecology, Czech Republic Journal: Journal of Forest Science Pages: 579-585 Volume: 50 Issue: 12 Year: 2004 DOI: 10.17221/4660-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4660-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200412-0005.txt Handle: RePEc:caa:jnljfs:v:50:y:2004:i:12:id:4660-JFS