Journal of Forest Science, 2004 (vol. 50), issue 1
Norway spruce thinning experiment Polom (Eastern Bohemia) after 22 years of observation
M. Slodičák, J. Novák
J. For. Sci., 2004, 50(1):1-10 | DOI: 10.17221/4594-JFS 
Effects of thinning were studied in an air-polluted young stand of Norway spruce on Polom series in the Orlické hory Mts. (North-Eastern part of the Czech Republic) founded in 1980 in 15 years old spruce stand established by planting with density of 3,500-4,000 trees per hectare in 1965. The stand lies at an elevation of 800 m in the 6th beech with spruce forest vegetation zone. The expected survival of the experimental stand at the beginning of experiments was 40 years (air pollution danger zone B). The thinning experiment is based on a classical comparative method, i.e. on comparing the stands with different thinning regimes (regime with...
Effects of pruning on heartwood formation in Scots pine trees
B. Bergström, R. Gref, A. Ericsson
J. For. Sci., 2004, 50(1):11-16 | DOI: 10.17221/4595-JFS
The object of this study was to investigate the effect of pruning on heartwood formation in mature Scots pine (Pinus sylvestris L.) trees. Fifty trees were treated by three different intensive pruning regimes: 42, 60 and 70 percentage of defoliation. After five growing seasons numbers of growth rings were counted and the width and the area of sapwood and heartwood were calculated. The results did not show any proportional increase or decrease in the heartwood area or in the number of growth rings in heartwood associated with the pruning. A statistically significant negative effect of pruning was found on the width of the five most recently...
Breeding value of Norway spruce (Picea abies [L.] Karst.)
R. Rożkowski
J. For. Sci., 2004, 50(1):17-23 | DOI: 10.17221/4596-JFS
This is the first report on measurements and observations of an experimental plot of 35-year-old Norway spruce, established in 1970 by the Institute of Dendrology at Kórnik, where progenies of 22 plustrees from the Kłodzko Forest District were planted. The experiment was established in an incomplete block design of 20 families with 3 replications. Survival rate and growth traits determining productivity (plant height or basal area - stem cross-sectional area at breast height per 1 ha) were assessed in several years, and qualitative traits (trunk straightness; degree of natural pruning; thickness, length and angle of branches; crown density; presence...
Damage by deer barking and browsing and subsequent rots in Norway spruce stands of Forest Range MoP.
P. Čermák, J. Glogar, L. Jankovský
J. For. Sci., 2004, 50(1):24-30 | DOI: 10.17221/4597-JFS
The paper deals with the determination of the rate of damage by deer barking and browsing, the subsequent rot caused by Stereum sanguinolentum and the rate of its progress, elucidates causes of damage and quantifies volume and financial losses in the region of Forest Range Mořkov, Forest District Frenštát pod Radhoštěm. In the most damaged 2nd age class, decay by Stereum sanguinolentum was recorded in 59% of damaged trees. The progress of rot ranged from 1 to 70 cm/year. The high number of red deer is considered to be the main reason of extensive damage by bark stripping in the Forest Range Mořkov. The actual financial...
Evaluation of changes in the tree species composition of Czech forests
I. Tomášková
J. For. Sci., 2004, 50(1):31-37 | DOI: 10.17221/4598-JFS
The tree species composition of forests in the Czech Republic has changed due to the human impact over the time. Nowadays, the idea of reducing the area with spruce stands and of increasing the area with broadleaved stands is widely discussed. The paper compares the target species composition with the presentone and creates four groups of areas with the largest and/or negligible differences between the target and the actual tree species composition using the Czech typology school.
Conversions of coppices to a coppice-with-standards in Urban Forests of Moravský Krumlov
D. Utinek
J. For. Sci., 2004, 50(1):38-46 | DOI: 10.17221/4599-JFS
Conversions of oak coppices were many times carried out only by renaming to false high forests. The paper presents a method of the conversion of overmature coppices to a coppice-with-standards implementation of which was started in urban forests of Moravský Krumlov. The method is inspired by Nanquett's method and conversions by J. Wiehl. The objective is to manage according to selection principles in a coppice-with-standards. In experimental plots established in 1999, the increment of standards and the development of natural regeneration of sessile oak were monitored in particular.
Forestry students and workers and their attitudes towards the environment
M. Pernica
J. For. Sci., 2004, 50(1):47-54 | DOI: 10.17221/4600-JFS
In any activity, thus at work as well, there is an influence of the environment on a human being. This environment, to which every worker has his own individual relationship, becomes a part and background of the worker's life. The realization of these interactions and relationships markedly affects achieved working results. The ecologically harmless technologies will not be used in forestry considerately towards the environment if forestry workers do not change their negative attitudes to their environment. In this project we tried to map out environmental knowledge of forestry workers.