Journal of Forest Science, 2009 (vol. 55), issue 4
Natural regeneration of senescent even-aged beech (Fagus sylvatica L.) stands under the conditions of Central Bohemia
L. Bílek, J. Remeš, D. Zahradník
J. For. Sci., 2009, 55(4):144-145 | DOI: 10.17221/823-JFS 
The natural regeneration of beech (Fagus sylvatica L.) was studied under various shelterwood densities and silvicultural treatments in senescent beech stands in Central Bohemia. Four permanent research plots differed in shelterwood density, crown cover and average relative light intensities. Between 2003 and 2007, seed production, seedling emergence and survival were followed. The mean density of beech seeds (full and empty) per 1 m2 was estimated in another forest stand. In the autumn of 2003 the values were distinctly higher than those indicated for full mast years of beech. Despite high losses during the wintering of seeds, relatively...
Tolerance of Norway spruce (Picea abies [L.] Karst.) embryogenic tissue to penicillin, carbapenem and aminoglycoside antibiotics
J. Malá, D. Pavingerová, H. Cvrčková, J. Bříza, J. Dostál, P. Šíma
J. For. Sci., 2009, 55(4):156-161 | DOI: 10.17221/100/2008-JFS
Somatic embryogenesis is conveniently utilized for the preparation of Norway spruce (Picea abies [L.] Karst.) transgenic clones by means of Agrobacterium. The establishment of successful transformation protocol requires to determine the tolerance of growing embryogenic tissue to antibiotics in culture and selective media. In 5 Norway spruce lines (genotypes) differences in the tolerance of embryogenic tissues to penicillin antibiotics (amoxicillin, carbenicillin, and ticarcillin), carbapenem antibiotic (meropenem) used for the Agrobacterium growth prevention, and aminoglycoside antibiotic (kanamycin) used in selective media were...
Recent fir hybridization research in the light of Czech-American cooperation
J. Kobliha, J. Stejskal
J. For. Sci., 2009, 55(4):162-170 | DOI: 10.17221/114/2008-JFS
The project is based on control pollination of different fir species in the sense of interspecific hybridization. The aim of this procedure is a new bred material for specific needs of forestry and Christmas tree production. Concrete breeding aims are represented in this sense by resistance to limiting environmental conditions (e.g. drought) and by resistance to diseases and pests. The experiment follows a traditional hybridization program of the department focused on the genus Abies and recently it has been extended by the Czech-U.S. cooperation (North Carolina State University Raleigh). For hybridization mainly Mediterranean fir species are...
A GIS-MCE based model for forest road planning
E. Abdi, B. Majnounian, A. Darvishsefat, Z. Mashayekhi, J. Sessions
J. For. Sci., 2009, 55(4):171-176 | DOI: 10.17221/52/2008-JFS
One of the cost factors in forest management is the development of road infrastructure. The objective of study was to develop a method using GIS and Multi-criteria Evaluation (MCE) to design a forest road network with the lowest construction cost while maintaining other technical requirements. Six road alternatives meeting technical requirements were developed using PEGGER. Then MCE was used to evaluate the construction costs of the candidate networks. The decision making group identified six factors as being relevant to the costs of forest roads. Then factors were compared in a pair-wise comparison, in the context of the Analytic Hierarchy Process...
Rutting and soil displacement caused by 450C Timber Jack wheeled skidder (Asalem forest northern Iran)
R. Naghdi, I. Bagheri, M. Lotfalian, B. Setodeh
J. For. Sci., 2009, 55(4):177-183 | DOI: 10.17221/102/2008-JFS
The use of skidding machinery in logging operations causes destructive effects especially on soil but has many advantages such as extracting long and heavy logs, optimum use of useful logging time and absence of defect in wood production quality and thus an increase in the added value of wood. In this research compartment 40 of the second district of Nav-Asalem in northern Iran at an altitude of 1,050-1,450 m above sea level was chosen in order to assess the amount of displaced soil volume and depth of ruts due to the traffic of Timber Jack 450C rubber wheeled skidder along the skid trail. Therefore, the correlations between two independent variables,...
Composition and diversity of psocid (Insecta: Psocoptera) taxocoenoses in forest ecosystems of the Abieti-fageta s. lat. zone in the Western Carpathian Mts.
O. Holuša
J. For. Sci., 2009, 55(4):184-192 | DOI: 10.17221/88/2008-JFS
Psocid (Psocoptera) taxocoenoses were studied in forest ecosystems of the Western Carpathian Mts. in 1997-2001. As a study frame, vegetation tiers (VT = altitudinal vegetation zones) of geobiocoenological or forest-typological system were used. Lower units of forest typological system (forest type complexes) were used for the classification of ecological conditions and the material found in forest ecosystems of Abieti-fageta s. lat. communities (5th fir-beech VT) was evaluated in detail. This VT is the most widespread in the regions under study (the Moravskoslezské Beskydy Mts., the Vsetínské vrchy Hills and Javorníky). 2,023 adults...