Template-Type: ReDIF-Article 1.0 Author-Name: Z. Adamec Author-Workplace-Name: Department of Forest Management and Applied Geoinformatics, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: K. Drápela Author-Workplace-Name: Department of Forest Management and Applied Geoinformatics, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Generalized additive models as an alternative approach to the modelling of the tree height-diameter relationship Abstract: Generalized additive models were tested using three types of smoothing functions as an alternative for modelling the height curve. The models were produced for 23 forest stands of Norway spruce (Picea abies [L.] Karst.) in the territory of the Training Forest Enterprise Masaryk Forest Křtiny. The results show that the best evaluated and recommended for practical use at the level of forest stand was the LOESS function (locally weighted scatterplot smooting) when using a greater width of the bandwidth. Due to the frequent overfitting and the associated unrealistic behaviour of the function, smoothing by spline functions cannot be recommended for modelling the height curve at the level of forest stand. It was validated that the resulting model must be assessed not only according to the calculated quality criteria, but also depending on the graphic pattern of the model which must ensure that the height curve pattern is realistic. The quality of the resulting models (with LOESS function) was assessed to be high, mainly due to the very precise determination of model heights. Keywords: loess, nonparametric method, Norway spruce, Petterson function, smoothing function, spline Journal: Journal of Forest Science Pages: 235-243 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/14/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/14/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0001.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:14-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: V. Kupčák Author-Workplace-Name: Department of Forestry Economics and Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic Author-Name: Z. Šmída Author-Workplace-Name: Department of Forestry Economics and Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Czech Republic Title: Forestry and wood sector and profitability development in the wood-processing industry of the Czech Republic Abstract: Economic viability of sustainable forest management has been included in particular forestry strategic documents since 2003. In these documents, it is stated, among other things, that economic viability is a key pillar of sustainable forest management and is of conclusive significance in preserving forests and their multiple benefits for the society. At the same time - the economic viability of sustainable forest management depends essentially on wood-producing functions of forestry. The paper aims at an identification of this key concept and at a situation analysis of economic viability under current conditions of the forestry and wood sector in the Czech Republic with a special focus on the wood-processing industry as part of the forestry and wood sector using a financial analysis. Keywords: economic viability of sustainable forest management, forestry-wood sector, sawmilling, profitability, profitability indicators Journal: Journal of Forest Science Pages: 244-249 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/113/2014-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/113/2014-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0002.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:113-2014-JFS Template-Type: ReDIF-Article 1.0 Author-Name: T. Abedi Author-Workplace-Name: Environmental Research Institute, Academic Center for Education, Culture and Research, Rasht, Iran Author-Name: Sh. Moghaddami Author-Workplace-Name: Environmental Research Institute, Academic Center for Education, Culture and Research, Rasht, Iran Title: Phytoremediation concept: biomass production and growth of Populus deltoides under compost leachate irrigation Abstract: Compost leachate is produced by conversion of municipal waste to compost. It contains significant amounts of organic materials, nutrients, soluble salts and small amounts of some heavy metals. Adding compost leachate to the soil can pollute it, and also improve soil fertility. In this study, we investigated absorption and growth performance of Populus deltoides under irrigation with leachate of the Compost Plant of Rasht. At the beginning of the growing season, in mid-March 2013, cuttings were processed from young, one-year-old seedlings of Populus trees in the greenhouse of the Safrabaste Poplar Research Station. Cuttings were planted in pots filled with loamy-sandy soil in the vicinity of the area with 40cm depth. Compost leachate was taken from a collection reservoir where leachate from the open composting of organic municipal wastes and various gardening and plant wastes had been collected. Five treatments were applied to plants: (C) tap water (control), (P) pure leachate, (3:1) three units (by volume) of leachate mixed with one unit of tap water, (1:1) and (1:3). The growth of tree diameter and height was measured bi-monthly. Aboveground (stem, branches and leaves) and root biomass was inventoried at the end of the growing season. Concentration of elements was determined every three months. Overall, growth parameters in 1:1 and 1:3 treatments were similar together and there were no significant differences between them (P < 0.05). Pure treatment had minimum growth because of a high concentration of solvable salts in leachate such as sulphur that causes salinity and high EC in soil. Treatment1:3 exhibited the greatest overall aboveground and root dry mass. Total aboveground dry mass of leachate treatments and water was 202.25 and 47.58 g, respectively. Keywords: treatment, growth, compost leachate, cutting Journal: Journal of Forest Science Pages: 250-254 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/121/2014-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/121/2014-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0003.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:121-2014-JFS Template-Type: ReDIF-Article 1.0 Author-Name: A. Majlingová Author-Workplace-Name: Fire Research Institute of the Ministry of Interior, Bratislava, Slovak Republic Title: Automated procedure to assess the susceptibility of forest to fire Abstract: The paper deals with the introduction of DSS tools and methodological approach that was developed in the framework of a dissertation thesis, aimed at the problem of assessment of forest susceptibility to forest fire. To automate the assessment procedure, a decision-making model was developed in the NetWeaver environment, organized in a hierarchical network. In the assessment, an approach was applied that is based on multicriteria assessment of various factors, assumed to have an impact on the occurrence and spread of fire in the natural environment. In the article original results of susceptibility assessments are presented, performed for an area situated in the Slovensky raj Mts. territory, which is known as the most fire risky territory in Slovakia. Keywords: NetWeaver, protection of persons and property Journal: Journal of Forest Science Pages: 255-260 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/18/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/18/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0004.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:18-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Karami Author-Workplace-Name: Department of Forest Sciences, Gorgan University of Agricultural Sciences and Natural Resourses, Golestan, Iran Author-Name: M.R. Kavosi Author-Workplace-Name: Department of Forest Sciences, Gorgan University of Agricultural Sciences and Natural Resourses, Golestan, Iran Author-Name: M. Babanezhad Author-Workplace-Name: Department of Statistics, Faculty of Sciences, Golestan University, Golestan, Iran Title: Spatial pattern and disease severity of charcoal canker in Hyrcanian forests, north of Iran Abstract: This research investigated the population density of infected trees with charcoal canker disease and the interaction across the severity of the disease on Quercus castaneifolia in Hyrcanian forests, north of Iran. We used two-dimensional spatial analysis tools with data gathered in point-centred quarter format in 2013. We investigated the co-occurrence of the severity of the disease symptoms using the paired quadrat covariance analysis. The results showed that nearly 54% of the oak trees were affected by the disease so that the dead trees and high disease severity were strongly clustered at broader scales (800 m), the trees with only limited exudates and signs of the activity of Biscogniauxia mediterranea (De Not.) Kuntze occurred in the clusters away from the dead trees. The crown mortality and beetle-infested trees co-occurred with mortality and were strongly correlated. Also, the findings of this research showed that the density of trees per hectare was one of the influential factors on the damage severity of the charcoal canker disease, so that reducing the density could increase the damage severity of the disease. Keywords: Biscogniauxia mediterranea, oak decline, point-centred quarter method, Quercus castaneifolia Journal: Journal of Forest Science Pages: 261-267 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/4/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0005.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:4-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: K. Houšková Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: A. Martiník Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Does prolonged stratification of Douglas fir influence the yield of seedlings? Abstract: The paper analyses the influence of an extended period of cold stratification on the germination capacity, emergence rate and yield of seedlings in the Douglas fir as well as on the morphological parameters of one-year-old seedlings. A total of ten seed lots were used for evaluating germination capacity, originating from the Czech Republic, Slovakia, France and the USA. Germination capacity, emergence rate and yield of seedlings were analysed for two seed lots of Czech provenance on seed beds in the settings of a forest tree nursery. Tested variants involved (a) no pre-sowing treatment, (b) seed stratified for 21 days, and (c) seed stratified for 49 days. The germination capacity of the stratified seed was higher than that of the control variant for all of the seed lots. The effect of the stratification period length was zero for both germination capacity and emergence rate. Differences were identified between the stratification variants as regards germination energy and emergence rate. For the control variant, seedling yield reached only 1% and 2%. For the stratified seed, yield of seedlings of two selected Czech provenances was 18% and 16% (variant 21) and 26% and 36% (variant 49). Differences in the morphological parameters of seedlings were not straightforward. Keywords: provenance, germination, emergence Journal: Journal of Forest Science Pages: 268-273 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/7/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/7/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0006.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:7-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Kašák Author-Workplace-Name: Department of Forest Protection and Wildlife Management, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: J. Foit Author-Workplace-Name: Department of Forest Protection and Wildlife Management, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Double-spined bark beetle (Ips duplicatus) (Coleoptera: Curculionidae): a new host - Douglas fir (Pseudotsuga menziesii) Abstract: Spruces (Picea spp.) are considered to be the primary host trees of the double-spined bark beetle Ips duplicatus (Sahlberg, 1836), but occurrences on pines (Pinus spp.) are often reported. This paper documents the first recorded successful development of I. duplicatus on Douglas fir (Pseudotsuga menziesii) (Mirbel) Franco. Two densely infested Douglas fir trees were found in a forest dominated by Norway spruce (Picea abies) (L.) H. Karst., close to the village of Valšovice (Czech Republic). Ips duplicatus is an oligophagous species that attacks different coniferous tree species but was not previously reported to develop on Douglas fir. The infestation of Douglas fir recorded in the present study was most likely promoted by a large population of I. duplicatus in the studied region combined with a local lack of primary host trees as a consequence of bark beetle outbreak. Keywords: Czech Republic, forestry, pest, Scolytinae Journal: Journal of Forest Science Pages: 274-276 Volume: 61 Issue: 6 Year: 2015 DOI: 10.17221/28/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/28/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201506-0007.txt Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:28-2015-JFS