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Rodzaj buk (Fagus) obejmuje około dziesięciu gatunków drzew występujących w strefie klimatu umiarkowanego na półkuli północnej – Europie, Azji oraz Ameryce Północnej. W Polsce gatunkiem krajowym jest buk pospolity (Fagus sylvatica), który osiąga w naszym kraju północno-wschodnią granicę występowania.
The aim of the study was to present two issues concerning forests in the Sudety Mts. (SW Poland): 1) the process of tree mortality in individual years in the period between 2002 and 2018, as well as 2) the analysis of the radial growth of the main tree species (i.e. spruce, larch, beech, fir and Douglas fir). The intensity of the process of tree mortality is evidenced by the volume of wind−broken...
The aim of this study was to measure the weight of timber obtained from freshly cut trees and compare it with the applicable legal provisions pertaining the capability of transporting heavy loads by hand and also to indicate a problem significant for the occupational safety and health protection of employees working at wood harvesting. In Poland, about 40 million m³ of timber is harvested annually...
Three species of wood (larch, beech and red oak) were boiled in alkaline liquids. Wood species were divided into three groups for 30 samples each (the same average density and standard deviations). Samples were boiling in two types of liquids – seawater and black liquor. Time of boiling was always 20 hours. The density before and after treatment were measured also was investigated compressive strength...
The aim of this study was to assess the effect of competition on diameter growth of European beech (Fagus sylvatica L.), silver fir (Abies alba Mill.) and European hornbeam (Carpinus betulus L.) in forests with complex structure. For each tree we calculated set of 20 competition indexes in 4 variants for determining the scale of the competitors influence. The use of such a set of indices, allowed...
The European beech is a major component of central European forests, and the eastern limit of its range lies in Poland. However, the Holocene migration of the beech is not yet finished, especially in NE Poland, so the northern distribution of the beech continues to change. The main goal of this study was to determine if the beech will reach its northern limit in the future. The investigation was carried...
The concept of potential interception is used to determine maximum amount of water that can be retained by the surface of all parts of a sprayed tree. The word ‘potential' is supposed to emphasize the fact that ‘maximum interception' is not a constant value. For each individual rainfall it may assume a different value. Potential interception values depend each time on rainfall intensity and drop size...
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