Journal of Forest Science, 2016 (vol. 62), issue 5
Application of the Economic Value Added index in the performance evaluation of forest enterpriseOriginal Paper
E. Balážová, J. Luptáková
J. For. Sci., 2016, 62(5):191-197 | DOI: 10.17221/48/2015-JFS 
The paper aims at pointing to possibilities of using the Economic Value Added index in evaluating the forest enterprise performance. The given index ranks among the indices of fourth-generation evaluation emerging from the value-based management theory. When calculating the index, we took the financial statements of a chosen forest enterprise for our starting point. On the basis of the calculated results we can state that the index development in the enterprise had an increasing tendency during the period 2011-2013. Recognised values of the index were positive, i.e. the enterprise reached a positive market value for the enterprise owners.
In vitro regeneration of Pistacia vera L. from nodal explantsOriginal Paper
B. Benmahioul, M. Kaïd-Harche, F. Daguin
J. For. Sci., 2016, 62(5):198-203 | DOI: 10.17221/82/2015-JFS
To enhance the induction of shoots, the excised nodes were cultured on Murashige and Skoog medium containing different cytokinins and various concentrations. The best conditions for shoot induction and growth were with 6-benzyladenine at 1.0 mg.l-1. For axillary shoot proliferation, the excellent result was obtained using 2.0 mg.l-1 meta-topoline. Well-developed shoots (more than 2 cm in length) were successfully rooted ex vitro at 82% by treatment with commercial rooting powder (2% indole-3-butyric acid; Rhizopon®). Rooted plantlets were acclimatized in the greenhouse and the survival rate of transplantation reached 80%.
Comparison of growth development of micropropagated and generatively reproduced wild cherry (Prunus avium (L.) L.) on the Polná demonstration plot (Czech Republic) up to the age of 15 yearsOriginal Paper
J. Dostál, P. Novotný, J. Čáp
J. For. Sci., 2016, 62(5):204-210 | DOI: 10.17221/81/2015-JFS
Four clonal progenies of wild cherry obtained using an in vitro technique and control progeny of generative origin were tested on the Polná research plot in southeastern Bohemia. Growth characteristics of cherry trees were determined each year during the period 2000-2010. At the age of 15 years, the progenies reach mean heights of 4-9 m and diameter at breast height (DBH) of 5-10.5 cm. The determined differences in height and DBH between progenies are statistically significant. Cherry trees of generative origin and progeny of clone No. 14 grow markedly slower in comparison with clones Nos 24, 26 and 28. The values of growth characteristics...
The first contribution to the fauna of psocids (Insecta: Psocoptera) in forests in the Drahanská vrchovina Hills (Czech Republic)Original Paper
D. Mazáč
J. For. Sci., 2016, 62(5):211-222 | DOI: 10.17221/97/2015-JFS
Taxocenosis of psocids (Psocoptera) was studied in the territory of the Drahanská vrchovina Hills in the Czech Republic. Representative research plots were selected in forest ecosystems with natural species composition and spatial structure (small-scale strictly protected areas) as well as in forest ecosystems with altered tree species composition and spatial structure. Research was conducted in three altitudinal vegetation zones (AVZ): in 2nd communities of Fagi-querceta s. lat. (beech-oak forests), 3rd Querci-fageta s. lat. (oak-beech forests) and 4th Fageta abietis (beech...
Effect of mycorrhizal inoculation on black and white poplar in a lead-polluted soilOriginal Paper
A. Salehi, M. Tabari Kouchaksaraei, E. Mohammadi Goltapeh, A. Shirvany, J. Mirzaei
J. For. Sci., 2016, 62(5):223-228 | DOI: 10.17221/23/2016-JFS
A pot experiment was carried out to examine the effect of inoculation with arbuscular mycorrhizal fungi (originated from a soil polluted with Pb) on root mycorrhizal colonization, survival, growth and volume production of black and white poplar plants grown on polluted (Pb) and non-polluted soils. In July, mycorrhizal inoculation had no significant effect on stem growth and volume production of black and white poplar plants grown on polluted and non-polluted soils. In October, mycorrhizal inoculation improved only parameters of white poplar plants (survival on polluted soil; growth and volume production on polluted and non-polluted soils). Mycorrhizal...
Response of diameter and height increment to thinning in oak-hornbeam coppice in the southeastern part of the Czech RepublicOriginal Paper
B. Fedorová, J. Kadavý, Z. Adamec, M. Kneifl, R. Knott
J. For. Sci., 2016, 62(5):229-235 | DOI: 10.17221/13/2016-JFS
The objective of this paper was to test the hypothesis that growth and soil moisture would increase after heavy thinning in seven years old oak-hornbeam coppice stand. Effects of thinning on (i) diameter and height increment of the remaining sprouts in polycormons, and (ii) soil moisture were studied one year after thinning. The experiment was carried out in the southeastern part of the Czech Republic. Thinning reduced 50% of the total stump basal area per polycormon. One to five dominant sprouts were left. Results showed that thinning significantly increased diameter increment of sessile oak (59%) and European hornbeam (61%). However,...
Operator's physical workload in simulated logging and timber bucking by harvesterOriginal Paper
J. Dvořák, P. Natov, L. Natovová, J. Krilek, J. Kováč
J. For. Sci., 2016, 62(5):236-244 | DOI: 10.17221/21/2016-JFS
The aim is to conduct experimental measurements and analyses of physical and mental workload of harvester operators. Among other things, monitoring and analyses of work conditions and workload help reduce possible risks, injuries and long-term illnesses caused by occupational stress. The interim results of the presented ergonomic study describe and analyse the course of physical load upon performing selected work operations at the stage of timber harvesting in laboratory conditions at the harvester simulator. The authors study particularly the relations between independent variables (work operations) and dependent variables (pulse, respiration and...