Journal of Forest Science, 2010 (vol. 56), issue 1
The extent of root rot damage in Norway spruce stands established on fertile sites of former agricultural land
R. Mareš
J. For. Sci., 2010, 56(1):1-6 | DOI: 10.17221/36/2009-JFS 
The aim of this study was to compare the degree of root rot damage in two large complexes of Norway spruce stands established on former agricultural land at fertile sites. The root rot infection was observed on the stump cutting area on both intended and salvage clear fellings. Stands in Kružberk area in the Nízký Jeseník Mts. established on arable land showed very poor stability and large root rot damage at the age of 40-50 years. In contrast, stands in Lužná area in the Javorníky Mts., founded on former sheep pastures, were markedly much less damaged at the age of 90-110 years and proved to be able to provide quality timber, although they were damaged...
Characteristics of coarse woody debris in successional stages of natural beech (Fagus orientalis) forests of Northern Iran
K. Sefidi, M. R. Marvie Mohadjer
J. For. Sci., 2010, 56(1):7-17 | DOI: 10.17221/113/2008-JFS
Coarse woody debris (CWD) is an important structural and functional component in forests in Northern Iran. In this study we determine the temporal patterns of CWD in Kheyroud Forests by examining the CWD volume in different decay classes and size classes along a chronosequence of secondary forest succession. The volume of CWD followed the general "U-shaped" temporal trend: the highest in the late successional forest (51.25 m3.ha-1), lowest in the middle successional forest (25.95 m3.ha-1) and intermediate in the early successional forest (37.05 m3.ha-1). The late successional forest...
Variation of conducting area in stems of European larch (Larix deciduas) growing in fresh mixed coniferous forest and fresh mixed forest sites
M. Nawrot, M. Jakubowski, W. Pazdrowski, K. Kaźmierczak, M. Szymański
J. For. Sci., 2010, 56(1):18-27 | DOI: 10.17221/45/2009-JFS
The paper presents an attempt to determine conducting area (CA), relative conducting area (CA.k-1) and mean ring conducting area (CAar) on discs cut at breast height from stems of larch trees growing in fresh mixed coniferous forest and fresh mixed forest sites, representing four age classes and the main crop according to Kraft's classification. The value of CA increases with an improvement of the social class of tree position in the community, while no such dependences were found for the value of (CA.k-1). The parameter CAar, except for one case in age class IV in the fresh mixed coniferous forest site, increases with an improvement...
Heavy metal accumulation by willow clones in short-time hydroponics
J. Malá, H. Cvrčková, P. Máchová, J. Dostál, P. Šíma
J. For. Sci., 2010, 56(1):28-34 | DOI: 10.17221/69/2009-JFS
: The differences in Pb and Cd accumulation capabilities of Salix miyabeana, S. viminalis, S. × blanda, and S. elbursensis derived from willows planted in 1997 in coal-ash settling localities in the Krušné hory Mts.,the Czech Republic, were determined. Plantlets micropropagated by organogenesis were grown in sterile hydroponic media supplemented with 0.5mM Pb(NO3)2 or 0.5mM Cd(NO3)2. 4H2O. The samples of roots and aboveground parts were collected after 48, 72, 96, and 168 h of cultivation. Generally, substantially higher concentrations of accumulated Pb and Cd were identified in...
Costs of basic methods of forest landmaintenance in protective zones of high-voltage power lines in the Czech Republic
L. Šišák
J. For. Sci., 2010, 56(1):35-41 | DOI: 10.17221/75/2009-JFS
: The paper describes the basic potential methods and their costs of maintenance of forest lands in protective zones under high-voltage power lines (HVPL) 400 kV and 220 kV. In the present situation and with available information and data, it was possible to accomplish the average cost calculations for the whole area of the Czech Republic. The paper analyses the following mechanical and chemical methods of maintenance of forest lands: full-area scrub clearing with power saw (PS), selective individual scattered clearing of trees with PS, full-area scrub clearing by milling, full-area scrub clearing by the application of herbicides and arboricides, selective...
The effects of flooding and Phytophthora alni infection on black alder
V. Strnadová, K. Černý, V. Holub, B. Gregorová
J. For. Sci., 2010, 56(1):41-46 | DOI: 10.17221/67/2009-JFS
The influences of long-term flooding and Phytophthora alni subsp. alni infection on the growth and development of 4-year-old Alnus glutinosa (black alder) saplings were investigated. The black alder saplings were divided into four groups and then subjected to combinations of both factors - flooded and inoculated with pathogen, flooded non-inoculated, non-flooded inoculated, and control. The biomass of the living roots and actinorrhizae, increase in stem length, length of leaves, rate of chlorotic foliage, amount of foliage biomass and length of stem necrosis were assessed after seven weeks. Both factors, flooding and P. alni...