Journal of Forest Science, 2008 (vol. 54), issue 11

Architecture of root branches of Norway spruce trees (Picea abies [L.] Karst.) growing in gley soil

P. Štofko, M. Kodrík

J. For. Sci., 2008, 54(11):485-490 | DOI: 10.17221/55/2008-JFS  

In the locality Hnilé Blatá (the High Tatras Mts.), the structure was measured of root branches in the windthrown spruces (Picea abies [L.] Karst.). After cleaning the root plates, the number, diameter, and length of individual root branches were measured. Individual root branches were classified into twelve diameter classes - according to their diameters measured in the middle of the root branch length. We found out a high frequency of the root branches in the first three root-diameter classes; the values of the average frequency of root branches smoothly declined with their diameters increasing. We found out the lowest mean values of the root...

Assimilation apparatus variability of beech transplants grown in variable light conditions of blue spruce shelter

O. Špulák

J. For. Sci., 2008, 54(11):491-496 | DOI: 10.17221/57/2008-JFS  

The paper valuates the differences in the selected characteristics of the assimilation apparatus of beech transplants growing in various light conditions of blue spruce small pole stage in the Jizerské hory Mts. in the Czech Republic. The leaf area, chemical parameters, and photosynthetic capacity measured by the method of chlorophyll fluorescence were established. Light conditions of individual beech trees were determined by means of processing a hemisphere photograph of the crown space. The research revealed a significant trend of decreasing nitrogen content with increasing irradiance of the beech. The foliage of the sheltered beech trees exhibited...

Dynamics of tree species composition and characteristics of available space utilization in the natural forest of the National Nature Reserve Hrončokovský Grúň

M. Saniga, M. Balanda

J. For. Sci., 2008, 54(11):497-508 | DOI: 10.17221/49/2008-JFS  

The paper deals with changes in the diameter structure of particular tree species as well as with the selected production characteristics in the mixed virgin forest Hrončokovský Grúň. The object of the analysis was the diameter structure of particular tree species in developmental stages of virgin forest. The data were collected in the years 1972, 1982, 1992 and 2002 on permanent research plots 71.5 × 70 m (0.5 ha) in size. Diameter frequencies for particular tree species were approximated with the curves. The goal was to evaluate their mortality or vitality according to the strength of the correlation in developmental stages of the virgin forest....

Growth and health state of silver fir (Abies alba Mill.) in the ridge area of the Jizerské hory Mts.

V. Balcar, D. Kacálek

J. For. Sci., 2008, 54(11):509-518 | DOI: 10.17221/63/2008-JFS  

The silver fir was planted under mountain conditions in order to reveal its response to the addition of finely ground rocks (limestone and amphibolite) mixed with soil into the planting holes. The results document that the increments of the plantations fertilised with amphibolite were higher by 25% on average than those of the control plantations while the increments of the plantations treated with dolomitic limestone were lower by 13%. Generally, as concerns both the plantations with the application of ground rocks and the control ones, the development of the fir plantations in 1994-2007 is considered successful. As the damage by climatic stresses...

The applicability of the Pipe Model Theory in trees of Scots pine of Poland

T. Jelonek, W. Pazdrowski, M. Arasimowicz, A. Tomczak, R. Walkowiak, J. Szaban

J. For. Sci., 2008, 54(11):519-531 | DOI: 10.17221/28/2008-JFS  

In order to test the application importance of the Pipe Model Theory and to develop models for the share of sapwood in tree stems, a total of 114 Scots pines (Pinus sylvestris L.) were felled within the natural range of this species in three natural positions located in northern and western Poland. The analyses were conducted on wood coming from trees from the main layer of the stand, i.e. the first three classes according to the classification developed by Kraft. Dependences were analyzed between the biometric characteristics of model trees, e.g. tree height, diameter at breast height, crown length, crown basal area and the area and...