Journal of Forest Science, 2010 (vol. 56), issue 5
The effect of point application of fertilizerson the soil environment of spread line windrows in the Krušné hory Mts
D. Vavříček, J. Pecháček, P. Jonák, P. Samec
J. For. Sci., 2010, 56(5):195-208 | DOI: 10.17221/66/2009-JFS 
The plateau of the Krušné hory Mts. belongs to areas that suffered the greatest damage caused by air-pollution stresses in Europe. A part of cultural practices aimed at the reconstruction of local mountain forests was the inconsiderate use of bulldozer technologies for the preparation of sites for forest stand restoration. In the course of large-scale scarification the top-soil horizons were moved into line windrows, which caused marked degradation of the soil environment. The present revitalization of the soil environment is based on the principle of spreading these man-made windrows. Experimental plots were established in localities affected by scarification;...
Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration
V. Hart, M. Nentvichová-Hartová, P. Tauchman
J. For. Sci., 2010, 56(5):209-217 | DOI: 10.17221/77/2009-JFS
Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration under parent stand after weed suppression was investigated in the area of the Training Forest Enterprise in Kostelec nad Černými lesy. The study evaluates two measurements made in a two-year interval. The parent stand, where Douglas fir grows in mixture with our domestic tree species, is one of the oldest and most productive stands at the Training Forest Enterprise in Kostelec nad Černými lesy. Herbicides for the control of weeds were applied onto three permanent experimental plots under the parent stand. Measurements done on the plots show a high potential of natural...
Influence of micro-relief and weed competition on natural regeneration of mountain forests in the Šumava Mountains
V. Štícha, I. Kupka, D. Zahradník, S. Vacek
J. For. Sci., 2010, 56(5):218-224 | DOI: 10.17221/28/2009-JFS
Natural regeneration and its relationship to micro-relief and weed competition were studied on 6 research plots in mountain spruce forests in the Šumava Mountains. The data on density regeneration, total height and height increment of each seedling were recorded on 50 by 5 m transects. The position of each seedling was adjusted by a satellite system "Field map". The data show that an elevation is a significantly (significance level P = 0.99) preferable micro-relief for seedlings in most cases (7 of the total 9 cases). The regeneration density is low in a high-competition environment, i.e. in grass and ferns, where the number of seedlings is...
Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects on cambioxylophagous fauna
M. Pop, E. Kula, P. Maňas, R. Kajfosz
J. For. Sci., 2010, 56(5):225-235 | DOI: 10.17221/48/2009-JFS
Chemical thinning was applied in blue spruce (Picea pungens Engelm.) stands by the application of Roundup Klasik and Garlon 4 EC. The thinning efficacy of Garlon 4 EC was negligible, while that of Roundup Klasik reached nearly 100% when the full strength concentration was applied in quantities of 1 ml per 10 cm of stem girth using the method of drilling holes for the arboricide injection. Treated blue spruce trees died within 6 month after application. No difference was found in the response of silver and green varieties of blue spruce to the application of arboricides. Several species of cambioxylophages colonizing blue spruce were killed...
The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia
T. Hlásny, L. Kulla, I. Barka, M. Turčáni, Z. Sitková, M. Koreň
J. For. Sci., 2010, 56(5):236-242 | DOI: 10.17221/56/2009-JFS
Biotic agents driven spruce decline has been observed over several regions in Europe. We studied the spatial pattern of spruce stands mortality due to biotic agents in three spruce dominated regions in Slovakia - the Kysuce, Orava and Low Tatras regions. Regularly reported data on sanitary felling were used for the analysis. Geostatistical techniques and other spatial modelling tools were used to design the zones of biotic hazard for each region. Zone A stands for the totally disintegrated stands with extremely elevated activity of biotic agents. Zone B represents the buffer zone around the zone A. Its width depends on the spreading potential of biotic...
The influence of selected factors on energy requirements for plain milling of beech wood
Š. Barcík, R. Kminiak, T. Řehák, M. Kvietková
J. For. Sci., 2010, 56(5):243-250 | DOI: 10.17221/119/2009-JFS
The paper deals with differences in energy requirements for cutting input at plain milling of beech wood with and without false heart with different changing parameters of cutting and feed speed and angular geometry of the tool. Created on optimal model from the aspect of not only energy consumption but also the quality of milling, which would also decisively affect the economic indicators of the wood - working process.