Journal of Forest Science, 2003 (vol. 49), issue 3

Dendrochronology of Scots pine (Pinus sylvestris L.) in the mountains of Poland

S. Wilczyński, J. Skrzyszewski

J. For. Sci., 2003, 49(3):95-103 | DOI: 10.17221/4684-JFS  

In the area of southern Poland 33 pine stands growing at the altitudes from 350 to 1,200 m above sea level in the Carpathian and Sudeten Mountains were selected as the object of studies. Thirty-three site chronologies of tree-rings, representing each site were constructed. A decrease in the similarity of dendrochronological signal chronologies occurred with the growing distance between the sites. Correlation and convergence analysis and the Principal Components Analysis permitted the differentiation of two chronology groups: the Western (Sudeten) and the Eastern (Carpathian) ones. On the basis of the site chronologies regional chronologies for the...

Soil chemistry changes in green alder [Alnus alnobetula (Ehrh.) C. Koch] stands in mountain areas

V.V. Podrázský, I. Ulbrichová

J. For. Sci., 2003, 49(3):104-107 | DOI: 10.17221/4685-JFS  

The present study documents the effects of green alder [Alnus alnobetula (Ehrh.) C. Koch] on the uppermost forest soil layers in mountain areas, respectively in the summit part of the Jizerské hory Mts. Pedochemical characteristics of holorganic horizons in stands of this species, established in 1992 on a clear-cut caused by air pollution, were compared to the status of soils in stands of bog pine (Pinus rotundata Link.). Extreme site conditions and young age of both stand types resulted in low effects on the humus forms in the first decade. Despite of this, enrichment in total nitrogen content and tendency to acidification...

Effect of long-term tending on qualitative and quantitative production in mixed stands of spruce, fir and beech on Motyky research plot

I. Štefančík, L. Štefančík

J. For. Sci., 2003, 49(3):108-124 | DOI: 10.17221/4686-JFS  

The paper is a contribution to research on thinnings in mixed (spruce-fir-beech) stands situated in the fifth forest altitudinal zone in the central part of Slovakia. Three plots were tended by free crown thinning while one plot was left without any planned silvicultural treatment (as a control). Dynamic changes in tree species composition, stand structure and quantitative production were evaluated for a period of 30 years. A special attention was paid to development of crop trees that are the main bearers of stand quality and quantity. The changes were compared with respect to differences between plots with long-term silvicultural treatments and control...

Root decays as a potential predisposition factor of a bark beetle disaster in the Šumava Mts.

L. Jankovský, P. Cudlín, I. Moravec

J. For. Sci., 2003, 49(3):125-132 | DOI: 10.17221/4687-JFS  

Root decay infection and potential relations to Ips typographus L. outbreaks in the Šumava Mts. (Bohemian Forest) were monitored in 3 permanent sample plots. As an originator of root decays honey fungus predominated, in particular cases Heterobasidion annosum (Fr.) Bref. was also recorded. As for honey fungus species, Armillaria ostoyae (Romagn.) Herink predominated, however, A. cepistipes Velenovský and A. borealis Marxmüller et Korhonen were also determined. Other wood-destroying fungi were also recorded, e.g. Stereum sanguinolentum (ALB. & SCHW.: FR.) FR. and Climacocystis borealis...

Change of cold hardiness in bare-rooted Norway spruce planting stock during autumn and its effect on survival

M. Sarvaš

J. For. Sci., 2003, 49(3):133-139 | DOI: 10.17221/4688-JFS  

The objective of this study was to test a method of measurements of electrolyte leakage for determining an optimal autumn lifting date. The second objective was to obtain information about the effects of different autumn lifting dates on survival of Norway spruce (Picea abies [L.] Karst.) plants. A significant difference was found between lifting dates for the values of root electrolyte leakage (REL) from unstressed plants, but without clear tendency. The values of electrolyte leakage from shoots (SEL) were very stable (11-13%). On the other hand, the electrolyte leakage from roots (REL) decreased in dependence on different lifting date after...