Journal of Forest Science, 2019 (vol. 65), issue 6

The effect of the Sequoiadendron giganteum (Lindl.) Buchholz cone crystals on germinationOriginal Paper

Hana Prknová

J. For. Sci., 2019, 65(6):203-208 | DOI: 10.17221/43/2019-JFS  

The cones of the giant sequoia contain red, water-soluble crystalline substances known as cone crystals. The inhibitory effect of this extracted material on Norway spruce, Scots pine and European larch germination was newly examined. Sown seed representative samples without and with added cone crystals were compared after their incubation in the same appropriate conditions. All these cases have brought compelling evidence that cone crystals totally inhibit germination. However, the chemically inhibited seeds being rinsed afterwards germinated very well. This switch effect caused by the cone crystals of the three above-mentioned conifers proved to be...

Forecasting drying up of spruce forests in Transcarpathia (Ukraine) using the FORKOME modelOriginal Paper

Ihor Kozak, Taras Parpan

J. For. Sci., 2019, 65(6):209-217 | DOI: 10.17221/30/2019-JFS  

This paper presents the results of analysis of drying up of spruce stands obtained by the use of the FORKOME computer model. The verification of this model was conducted with field data from spruce-dominated mixed forests in Transcarpathia (Ukraine). The forecast of drying up, based on the latest version of the simulation of FORKOME computer model, allowed to evaluate results regarding bioclimatic effects on the displacement, growth, survival and death of spruce and other tree species. The modelling was performed on the basis of statistical Monte Carlo simulations. The forecast of the spruce stand dynamics was conducted for 100-year period along with...

The reaction of different Sorbus L. species to low temperatures during thaw in the Orel regionOriginal Paper

Zoya Ozherelieva, Olga Emelianova

J. For. Sci., 2019, 65(6):218-225 | DOI: 10.17221/8/2019-JFS  

Five Sorbus L. species of different ecological and geographical origin growing in the VNIISPK arboretum were studied. The Institute is located 368 km southwest of Moscow, on the Central Russian upland in the European part of Russia. The studies were carried out in 2014-2016. The reaction of different Sorbus L. species to a three-day thaw +2°C with a subsequent decrease in temperature to -25°C in February and -30°C in March was studied in order to identify adapted species to the climatic conditions of the Orel region for use in ornamental horticulture. As a result of the experiment, we recommend Sorbus aria (L.) Crantz, Sorbus...

The perception of forests by the Czech Republic general publicOriginal Paper

Hana Krejčí, Marta Stárová, Ivan Hrbek, Miroslava Navrátilová, Markéta Beranová

J. For. Sci., 2019, 65(6):226-233 | DOI: 10.17221/138/2018-JFS  

Forests as a part of landscape do not fulfil their economic function (timber production) only but a lot of other non-economic functions, especially ecological ones. Both economic and non-economic functions are indisputable and equally important for society. The aim of this paper is to identify current attitudes to forest perceptions by citizens in the Czech Republic. Primary data were obtained by means of a questionnaire research survey which was carried out in 2018. Altogether 824 respondents took part in this survey (n = 824). From the results follows that approximately 70% of respondents visit forest at least three times a month. In connection with...

International assessment of bioenergy stakeholders research requirements of GIS based biomass analyticsOriginal Paper

Brianna Heeley, Sanjeev Kumar Srivastava, Mohammad R. Ghaffariyan

J. For. Sci., 2019, 65(6):234-246 | DOI: 10.17221/31/2019-JFS  

As the demand and production for renewable energies increases there is a growing need to research new technologies to increase the efficiency, productivity and profitability of production. This study aimed to investigate the priorities of bioenergy stakeholders on Geographic Information Systems based research in a variety of countries including a number throughout Europe, the United States and Australia. A voluntary questionnaire was distributed internationally to bioenergy stakeholders to discern perceived usefulness ratings for various analytics. Participants rated Economic analytics as the most useful followed by Environmental, Product quality and...