Journal of Forest Science, 2008 (vol. 54), issue 6
Value production of poplar clones
R. Petráš, J. Mecko, V. Nociar
J. For. Sci., 2008, 54(6):237-244 | DOI: 10.17221/12/2008-JFS 
The results of research on the value production of the stands of poplar clones Robusta and I-214 carried out in Slovakia are presented. Models of value yield tables were constructed separately for each clone. The models simulate gross and net financial yield of wood production in dependence on the site index and age of stand. They were constructed on the basis of the models of assortment yield tables, timber prices according to assortments and the models of own costs of timber felling and processing. The clone I-214 produces a faster and higher proportion of thicker assortments of average and below-average quality, and therefore it has the higher value...
Response of the Norway spruce (Picea abies [L.] Karst.) root system to changing humidity and temperature conditions of the site
O. Mauer, R. Bagár, E. Palátová
J. For. Sci., 2008, 54(6):245-254 | DOI: 10.17221/14/2008-JFS
The Bohemian-Moravian Upland shows a large-scale decline and dieback of Norway spruce up to the forest altitudinal vegetation zone (FAVZ) 5. This phenomenon has been observed in the last 7 years and its progress is rapid. Healthy, declining and standing dry trees of equal height were mutually compared in nine forest stands (aged 3-73 years). These parameters were measured: increment dynamics, root system architecture, biomass, fine root vitality and mycorrhiza, infestation by biotic and abiotic agents. Analyses were done for 414 trees, soil characteristics and weather course data covered the period 1961-2004. Warming and precipitation deficit are the...
Can 13C stable isotope record of Norway spruce tree rings display the effect of environmental conditions?
L. Píšová, M. Svoboda, J. Šantrůček, H. Šantrůčková
J. For. Sci., 2008, 54(6):255-261 | DOI: 10.17221/816-JFS
The Bohemian Forest Mts. (Šumava) were exposed to heavy atmospheric pollution in the last century. A possible negative effect of atmospheric pollution on tree physiology has been studied using the isotopic composition, Δ13C, of tree rings. The wood is depleted of 13C relative to the air due to isotopic discrimination against 13C and preferred uptake of 12C during photosynthesis. The ratio 13C/12C (Δ13C) reflects the relative magnitudes of net assimilation and stomatal conductance that relate to demand and supply of CO2. Carbon-13 data are thus a useful...
The response of weevil communities (Coleoptera: Curculionoidea) to the altitudinal zones of beech stands
J. Beránek
J. For. Sci., 2008, 54(6):262-272 | DOI: 10.17221/25/2008-JFS
Good knowledge of geobiocoenoses is one of the primary preconditions for biogeographical differentiation of the landscape, protected territory tending and preservation of forest ecosystems. For deepening the knowledge of the complex geobiocoenological relations the study of curculiocoenoses was conducted. It was conducted in eighteen permanent research plots based in beech stands of the 3rd, 4th and 5th altitudinal zone in the regions of South Moravia and East Bohemia. The relation of weevils to altitudinal zones was proved on the basis of some ecological index numbers and statistic methods DCA and CCA (P ≤...
Forest reclamation of dumpsites of coal combustion by-products (CCB)
P. Čermák
J. For. Sci., 2008, 54(6):273-280 | DOI: 10.17221/6/2008-JFS
The present paper describes the reclamation of dumpsites of coal ash - coal combustion by-products (CCB) generated by the burning of brown coal in thermal power plants. It evaluates the soil properties of formed Anthroposols and growth vitality of the forest tree species Quercus robur L., Quercus rubra L., Pinus sylvestris L., Betula verrucosa Ehrh., Populus tremula L., Populus nigra L., Salix fragilis L., Salix alba L., Alnus glutinosa (L.) Gaertn. The best growth vitality at these sites was reached in tree species of seed origin from the vegetation series of primary succession. Deformations...
Structural and compositional responses to timber harvesting for an old-growth forest on Changbai Mountain, China - Short Communication
H. Gu, L. Dai
J. For. Sci., 2008, 54(6):281-286 | DOI: 10.17221/20/2008-JFS
Broadleaved-Korean pine (Pinus koraiensis) mixed forest is a dominant native vegetation type in the eastern Eurasian Continent. We intended to examine the implications of high-intensity timber harvesting (ca 70% of stand volume) for the sustainable management of a mixed forest ecosystem. We measured trees at three sites: control without cutting, older-cut site cut in 1987 and newer-cut site (cutting in 1997). There were significant differences in structure and composition between these three sites in 2003. There were 4,441 trees of 14 species with basal area 56 m2 at control plot, 6,314 trees of 16 species with basal area 9 m2...