Journal of Forest Science, 2005 (vol. 51), issue 6
The characteristics of diameter growth and increment of introduced North American ash species at the sites of common alder
D. Kremer, J. Čavlović, I. Anić
J. For. Sci., 2005, 51(6):237-243 | DOI: 10.17221/4559-JFS 
Research was conducted into diameter growth and increment of introduced American ash species at the sites of common alder (Alnus glutinosa[L.] Gaertn.) in three mixed stands of introduced ash and common alder in the lowland part of Croatia. About 10 samples of increment cores of each species were taken from trees in the diameter class of the mean basal area. In the process, an attempt was made to reach the centre of the trees with the purpose of getting an insight into the development of the trees over a long period, i.e. from the moment when the trees reached breast height. The increment cores were analysed by measuring the width of each...
Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description
M. Křepela, D. Zahradník, J. Sequens
J. For. Sci., 2005, 51(6):244-255 | DOI: 10.17221/4560-JFS
The paper shows a possibility of using Bookstein coordinates for stem shape studies. Bookstein coordinates are simplified to stem shape diameters, for which tests of multidimensional normality, variance-covariance matrix homogeneity, equality of mean shape vectors and principal component calculation are carried out in sample plots Doubravčice 1 and Štíhlice. Principal components are also calculated for Procrustes tangent coordinates, presented in graphs, and the plots are compared. Doubravčice 1 and Štíhlice plots differ especially in age (70 and 30 years) while they do not differ in tree class representation.
New finds of Cryphonectria parasitica and the first record of chestnut blight on red oak Quercus rubra L. in the Czech Republic
P. Haltofová, L. Jankovský, D. Palovčíková
J. For. Sci., 2005, 51(6):256-258 | DOI: 10.17221/4561-JFS
The causal agent of the chestnut blight, the fungus Cryphonectria parasitica (Murrill) M. E. Barr (syn. Endothia parasitica (Murrill) P. J. Anderson et H. W. Anderson), was found out at new localities in the Czech Republic. The chestnut blight was observed for the first time in the Czech Republic in 2002. Two new localities were discovered in southern Moravia in May and June 2004. The disease was identified both on the sweet chestnut (Castanea sativa Mill.) and on the red oak (Quercus rubraL.). Infected trees were treated according to the order of the State Phytosanitary Administration of the Czech Republic.
Dynamics of oak mycorrhizas
V. Pešková
J. For. Sci., 2005, 51(6):259-267 | DOI: 10.17221/4562-JFS
A decline of macromycetes, especially of ectomycorrhizal species, has been described in the last decade in various parts of Europe. These changes are attributed to direct or indirect effects of air pollution. In Central Europe these changes correlate with visual damage of forest. Many ectomycorrhizal fungi seem to be very suitable bioindicators of the disturbance of forest ectotrophic stability. Stages of this disturbance can be linked directly to particular phases of impoverishment of ectomycorrhizal mycocoenoses. These conclusions have been obtained from long-term research on permanent plots (1,000-2,500 m2) in spruce and oak forests in...
Effects of pressure on the root systems of Norway spruce plants (Picea abies[L.] Karst.)
R. Gebauer, M. Martinková
J. For. Sci., 2005, 51(6):268-275 | DOI: 10.17221/4563-JFS
Roots are stressed quire often under natural conditions, e.g. when considering sloping terrain, layers of fluvial deposits, huge layers of melting snow, load of heavy forest machinery during logging and hauling operations, recreational activities of people, high density of deer or cattle, etc. We focused our experiments on Norway spruce (Picea abies[L.] Karst.) seedlings grown in containers with glass walls under the permanent load of 5.1 kPa during the whole growing season. The applied pressure affected roots both directly and indirectly due to the occurrence of hypoxia. Root growth ceased under such conditions. Growth dynamics and capability...
Dynamics of soil temperature and its influence on biomass production of herb layer in a submontane beech forest
R. Janík
J. For. Sci., 2005, 51(6):276-282 | DOI: 10.17221/4564-JFS
The paper summarizes the results of long-term measurements of soil temperature. The measurements were performed at two depths: 5 cm and 20 cm, on a series of five experimental plots with different stocking. The temperature of soil in the submontane beech forest at the Ecological Experimental Site (EES) Kremnické vrchy Mts. reached maximum values in August, minimum ones in February. The obtained data were processed using t-test and regression analysis - to evaluate the influence of soil temperature at the discussed soil depths on the biomass production in plants. An important influence of this factor was confirmed at both depths.