Journal of Forest Science, 2011 (vol. 57), issue 9
Profitability and competitiveness of forestry in European countries
M. Kovalčík
J. For. Sci., 2011, 57(9):369-376 | DOI: 10.17221/138/2010-JFS 
Competitiveness of the forest sector is a necessary prerequisite for the multiple benefits that sustainable forestry provides to society. There is no universal indicator of competitiveness. GDP of the forestry and contribution of forestry to the GDP could be suitable indicators for the forest sector. Competitiveness of forestry may be evaluated by gross and net value added and by the entrepreneurial income as well. The aim of this paper was to compare the competitiveness of forestry in selected European countries based on the results of Economic Accounts for Forestry. On the basis of provided analyses it can be stated: there are great differences in...
Does the climate of the origin control anatomical characteristics of the vessel elements as well as different foliar traits in Fagus crenata?
V. Bayramzadeh, P. Attarod, M. T. Ahmadi, S. H. Rezaee Amruabadi, T. Kubo
J. For. Sci., 2011, 57(9):377-383 | DOI: 10.17221/93/2010-JFS
The relationships between climatic factors and anatomical characteristics of the vessel elements as well as different foliar traits were investigated in Fagus crenata seedlings originating from different provenances. Fagus crenata samples were prepared from Chichibu Research Forest of Tokyo University. In the present study, vessel number per mm2, average vessel diameter, vessel area percentage, vessel element length, percentages of perforation plate types, transpiration rate, stomatal conductance, leaf area, leaf thickness, leaf dry mass per unit leaf area, stomatal density and stomatal pore length were measured. Vessel...
The occurrence of insect pests on pedunculate oak tested on the Chrostowa II experimental plot
J. Banach, K. Lenowiecki
J. For. Sci., 2011, 57(9):384-393 | DOI: 10.17221/90/2010-JFS
The present paper is about the provenance and family diversity of insect occurrence on the offspring of 58 pedunculate oak (Quercus robur L.) trees representing 5 populations from the Polish range of species. Researches were conducted on the Chrostowa II test plot, located in the Brzesko Forest District (southern Poland). Differences in symptoms of trees inhabitation by Andricus kollari (Hartig, 1843) ♀♀, Andricus lignicolus (Hartig, 1840) ♀♀, Andricus foecundatrix (Hartig, 1840) ♀♀, Biorrhiza pallida (Olivier, 1791) ♀♂, Andricus inflator (Hartig,...
Evaluation of John Deere 1490D operation phase in typical conditions of the Czech Republic
S. Liška, R. Klvač, A. Skoupý
J. For. Sci., 2011, 57(9):394-400 | DOI: 10.17221/21/2010-JFS
The life cycle operation phase of John Deere 1490D energy wood harvester from the aspect of energy audit and environmentally negative influence caused by emissions were evaluated. Energy audit quantifies energy used in the form of fuels and oils as well as energy expended for manufacture, transport and distribution of these fuels and oils. Emissions produced by operation are determined according to the consumption of fuels and oils based on emission factors. We also made a comparison of the general calculation of costs based on data provided by the manufacturer with costs ascertained in real operating conditions. The costs are divided into purchase,...
Somatic embryogenesis of the hybrid Abies cilicica × Abies cephalonica
J. Korecký, J. Vítámvás
J. For. Sci., 2011, 57(9):401-408 | DOI: 10.17221/54/2010-JFS
The interspecific hybrid fir Abies cilicica × Abies cephalonica is based on native species Abies cephalonica (Loud.) and Abies cilicica (Ant. et Kotschy) Carr. Many variants of nutrient media have been tested. The medium BAP at a concentration of 1 mg.l-1, 1,000 mg.l-1 myo-inositol, 500 mg.l-1 glutamine, and 1,000 mg.l-1 casein was found to be the most suitable initiation medium for somatic embryogenesis of this hybrid. Embryogenic suspensor mass was produced from immature and mature primary explants. The initiation frequency of ESM was dependent on the composition of nutrient medium,...