Template-Type: ReDIF-Article 1.0 Author-Name: S. Miltner Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: I. Kupka Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Silvicultural potential of northern red oak and its regeneration - Review Abstract: Northern red oak (Quercus rubra Linnaeus) is a promising species which could help to mitigate the sanitary problems. Northern red oak is also a commercial species and offers many environmental services. Northern red oak prefers rather dry acidic sites commonly found in Bohemia. The literature confirms that the species is quite fertile but acorn production is highly variable. Northern red oak seedlings develop a long tap root during their first year, which enhances their survival and performance. Different silvicultural systems are proposed and pros and cons are discussed in this review including their influences on forest floor and soil. Keywords: ecological niche, acorn, silvicultural systems, soil Journal: Journal of Forest Science Pages: 145-152 Volume: 62 Issue: 4 Year: 2016 DOI: 10.17221/115/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/115/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201604-0001.txt Handle: RePEc:caa:jnljfs:v:62:y:2016:i:4:id:115-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: M.V. Ramírez Alzate Author-Workplace-Name: Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Concepción, Chile Author-Workplace-Name: Bioforest S.A., Concepción, Chile Author-Name: R.A. Rubilar Author-Workplace-Name: Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Concepción, Chile Author-Name: C. Montes Author-Workplace-Name: Warnell School of Forestry and Natural Resources, University of Georgia, Athens, USA Author-Name: H.L. Allen Author-Workplace-Name: Department of Forestry and Environmental Resources, College of Natural Resources, North Carolina State University, Raleigh, USA Author-Name: T.R. Fox Author-Workplace-Name: Department of Forest Resources and Environmental Conservation, College of Natural Resources and Environment, Virginia Polytechnic Institute and State University, Blacksburg, USA Author-Name: E. Sanfuentes Author-Workplace-Name: Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Concepción, Chile Title: Mid-rotation response to fertilizer by Pinus radiata D. Don at three contrasting sites Abstract: Mid-rotation responses to fertilization of Pinus radiata D. Don plantations after the first or second thinning have been observed in research experiments in many regions where the species is grown. The practice is not however common in commercial plantations. This is probably because the effects of soil-site conditions on the magnitude and duration of tree and stand growth responses are not well understood. The effects of nitrogen (150 and 300 kg N.ha-1) and phosphorus (0, 20 and 40 kg P.ha-1) including common base fertilization of boron (8 kg B.ha-1) and potassium (65 kg K.ha-1) were evaluated in three mid-rotation P. radiata plantations after thinning. The plantations were located on sites with contrasting nutrient and water availability, sandy, granitic and red-clay sites, in south-central Chile. The magnitude and duration of growth response was site specific. After 8 years, the growth response to the highest dose of fertilization relative to the control was 57 m3.ha-1 (16%) at the granitic and 24 m3.ha-1 (14%) at the sandy site. No response to either nitrogen or phosphorus fertilizer was observed at the red-clay site. Nitrogen and phosphorus were limiting at both granitic and sandy sites, and high fertilization doses considering 300 kg N.ha-1 plus 40 kg P.ha-1 would ameliorate nutrient resource limitations and yield a cost-effective increment in stand volume. Keywords: forest fertilization, sustained response, volume increment, stand growth, foliar nitrogen Journal: Journal of Forest Science Pages: 153-162 Volume: 62 Issue: 4 Year: 2016 DOI: 10.17221/106/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/106/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201604-0002.txt Handle: RePEc:caa:jnljfs:v:62:y:2016:i:4:id:106-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: O. Špulák Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Opočno Research Station, Opočno, Czech Republic Author-Name: J. Souček Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Opočno Research Station, Opočno, Czech Republic Author-Name: D. Dušek Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Opočno Research Station, Opočno, Czech Republic Title: Quality of organic and upper mineral horizons of mature mountain beech stands with respect to herb layer species Abstract: The study analyses the chemical properties of the soil in open-canopy beech stands in relation to the predominant species of ground vegetation. A hypothesis is examined whether the predominant ground vegetation species can represent in chemical terms different site conditions. Four localities were used for testing reed grass, myrtle blueberry, wavy hair grass and vegetation-free patches. Samples were taken from three organic horizons (litter (OL), fragmented (OF) and humus (OH)) and from the humic first mineral horizon. Significant differences between the variants were found only in the OL horizon, in which the vegetation species explained 65% of the variability in data. The OL horizon in the vegetation-free variant showed the significantly lowest pH/KCl and the lowest potassium content. The most distinct particular differences were observed between the blueberry variant and the grass variants. Although the studied variants of vegetation growing under the beech stand represented significant differences in the litter horizon chemistry, the effects on the other humus horizons and on the upper mineral horizon were marginal. Keywords: forest floor, top soil layers, soil chemical characteristics, Calamagrostis villosa, Vaccinium myrtillus, Avenella flexuosa Journal: Journal of Forest Science Pages: 163-174 Volume: 62 Issue: 4 Year: 2016 DOI: 10.17221/116/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/116/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201604-0003.txt Handle: RePEc:caa:jnljfs:v:62:y:2016:i:4:id:116-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: C.C. Draghici Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Human and Economic Geography, Faculty of Geography, University of Bucharest, Bucharest, Romania Author-Name: D. Peptenatu Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Human and Economic Geography, Faculty of Geography, University of Bucharest, Bucharest, Romania Author-Name: A.G. Simion Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Human and Economic Geography, Faculty of Geography, University of Bucharest, Bucharest, Romania Author-Name: R.D. Pintilii Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Human and Economic Geography, Faculty of Geography, University of Bucharest, Bucharest, Romania Author-Name: D.C. Diaconu Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Human and Economic Geography, Faculty of Geography, University of Bucharest, Bucharest, Romania Author-Name: C. Teodorescu Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Human and Economic Geography, Faculty of Geography, University of Bucharest, Bucharest, Romania Author-Name: R.M. Papuc Author-Workplace-Name: Department of Business Administration, Faculty of Business and Administration, University of Bucharest, Bucharest, Romania Author-Name: A.M. Grigore Author-Workplace-Name: Research Center for Integrated Analysis and Territorial Management, University of Bucharest, Bucharest, Romania Author-Workplace-Name: Department of Business Administration, Faculty of Business and Administration, University of Bucharest, Bucharest, Romania Author-Name: C.R. Dobrea Author-Workplace-Name: Department of Management, Faculty of Management, Bucharest University of Economic Studies, Bucharest, Romania Title: Assessing economic pressure on the forest fund of Maramureș County - Romania Abstract: Romania is also included among the European Union countries where deforested areas have radically increased in recent years, with mountain areas being the most affected. The pressure on the forest fund was analysed in the Maramureş County, as one of the most deforested counties of Romania. In view of assessing the forest area evolution, forested and deforested areas have been calculated for the period 2001-2012, using the Global Forest Change 2000-2012 database provided by the Department of Geographical Sciences, Maryland University. The economic pressure quantification was monitored by developing a database on economic activities based upon the loggings carried out in the period 2001-2012. This database comprises the number of companies, their turnover, profit and the number of employees for the economic sectors causing pressure on the forest fund. The outcomes show a dramatic increase in deforested areas, amounting to over 16,500 ha in the Maramureș County. Nearly 5,000 ha have been deforested in Borșa, the commune with the largest deforested areas in the period 2000-2012, causing major imbalances to the local ecosystem. Keywords: deforested areas, forested areas, forestry economics, territorial management, territorial systems Journal: Journal of Forest Science Pages: 175-185 Volume: 62 Issue: 4 Year: 2016 DOI: 10.17221/72/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/72/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201604-0004.txt Handle: RePEc:caa:jnljfs:v:62:y:2016:i:4:id:72-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: V. Štícha Author-Workplace-Name: Department of Forest Technologies and Construction, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: J. Macků Author-Workplace-Name: Department of Forest Technologies and Construction, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: O. Nuhlíček Author-Workplace-Name: Department of Forest Technologies and Construction, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Effect of permanent waterlogging on the growth of poplar clones MAX 4, MAX 5 (J-104, J-105) (Populus maximowiczii A. Henry × P. nigra Linnaeus) and evaluation of wood moisture content in different stem parts - Short Communication Abstract: The study deals with differences in the growth of 2-year mix of poplar clones MAX 4, MAX 5 in the first rotation period at a site with the average moisture regime and at a neighbouring site affected by waterlogging. Average diameter at breast height (DBH) at the site without the observable water influence was 19.6 mm (average height 380 cm). Average DBH at the water-affected site was 8.1 mm (height 220 cm). The difference was statistically significant, which corroborates the hypothesis of the adverse influence of waterlogging on the growth of poplar clones. Furthermore, moisture content was ascertained in wood samples. A comparison was made of samples from the butt, middle part and top part of the stem. Differences between the respective stem parts were not statistically significant. Total average wood moisture content at the time of harvest (January 2012) was 59.7%. Keywords: biomass, fast-growing tree species, effect of site, energy coppicies, short rotation, Japanese poplar Journal: Journal of Forest Science Pages: 186-190 Volume: 62 Issue: 4 Year: 2016 DOI: 10.17221/90/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/90/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201604-0005.txt Handle: RePEc:caa:jnljfs:v:62:y:2016:i:4:id:90-2015-JFS