Template-Type: ReDIF-Article 1.0 Author-Name: Dafni FOTI Author-Workplace-Name: Laboratory of Forest Utilization, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece Author-Name: Costas PASSIALIS Author-Workplace-Name: Laboratory of Forest Utilization, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece Author-Name: Elias VOULGARIDIS Author-Workplace-Name: Laboratory of Forest Utilization, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece Author-Name: Apostolos SKALTSOYIANNES Author-Workplace-Name: Laboratory of Forest Genetics and Tree Improvement, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece Author-Name: Maria TSAKTSIRA Author-Workplace-Name: Laboratory of Forest Genetics and Tree Improvement, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece Title: Wood density and tracheid length of Aleppo pine (Pinus halepensis Mill.) grafts in relation to cambium age and growth rate Abstract: Wood density, tracheid length and growth rate were measured in Aleppo pine scions, 21-23 years old, and in Brutia pine rootstocks. In regard to the relationship between cambial age and dry density the results showed that the density increased with cambial age in both scions and rootstocks while the differences between Aleppo pine and Brutia pine were small. The relationship between cambial age and tracheid length showed an increase of tracheid length with cambial age. Differences between scions and rootstocks were small. From the last relationship it can be extracted that juvenile wood is produced in both scions and rootstocks although the Aleppo pine branches which were used for grafting were genetically matured. Between ring width and dry density and between ring width and tracheid length no statistical correlations were found either in scions or in rootstocks. The tracheid length in mature wood was higher than in juvenile wood. An increase of tracheid length with ring width was observed only in the case of juvenile wood. Keywords: wood quality, juvenile wood, mature wood, scions, rootstocks Journal: Journal of Forest Science Pages: 101-107 Volume: 64 Issue: 3 Year: 2018 DOI: 10.17221/127/2017-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/127/2017-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201803-0001.txt Handle: RePEc:caa:jnljfs:v:64:y:2018:i:3:id:127-2017-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Tomáš Čihák Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Workplace-Name: Department of Forest Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Monika Vejpustková Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Title: Parameterisation of allometric equations for quantifying aboveground biomass of Norway spruce (Picea abies (L.) H. Karst.) in the Czech Republic Abstract: The aim of the present study was to develop allometric equations for predicting aboveground biomass of Norway spruce (Picea abies (Linnaeus) H. Karsten) applicable to the typically managed spruce forest on acidic and nutrient-medium sites in the Czech Republic. The models were based on an extensive data set of 139 spruce trees collected in 25 stands on 15 sites. The biomass in dry mass was modelled using linear regression equations with one (diameter at breast height - D), two (D, slenderness ratio - H/D) or three (D, H/D, site index - SI, or tree age - A) predictors. The models were validated using the leave-one-out method. The value of the root mean square error of cross-validation was chosen as the main criterion for the best-model selection. Both the total aboveground biomass and stem biomass were best predicted by three-variable models (D, H/D, SI). For crown and foliage biomass the simple one-variable model (D) is recommended. Keywords: allometry, biomass model, linear regression, logarithmic transformation Journal: Journal of Forest Science Pages: 108-117 Volume: 64 Issue: 3 Year: 2018 DOI: 10.17221/61/2017-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/61/2017-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201803-0002.txt Handle: RePEc:caa:jnljfs:v:64:y:2018:i:3:id:61-2017-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Jiří ČÁP Author-Name: Petr NOVOTNÝ Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Martin FULÍN Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Jaroslav DOSTÁL Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: František BERAN Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Title: Evaluation of lodgepole pine (Pinus contorta Dougl. ex Loudon) on a provenance plot situated in a formerly air-polluted area of the Krušné hory Mts. at the age of 34 years Abstract: The article evaluates 27 provenances of three subspecies of lodgepole pine on the Kovářská research plot (Krušné hory Mts.). The plot is part of a series of three established plots in various stand conditions. Two plots were already evaluated and the findings were published. At 34 years of age, we evaluated height, DBH, trunk shape, trunk forking, branch thickness, bark type, mortality, and defoliation. A total of 1,147 trees were measured. Above-average growth was achieved predominantly by the provenances of Pinus contorta subsp. latifolia (Engelmann ex S. Watson) Critchfield from middle elevations. In the Pinus contorta subsp. contorta Douglas ex Loudon, only the 2099 Port Orford provenance from Oregon demonstrated favourable results, and in the Pinus contorta subsp. murrayana (Balfour) Engelmann it was 2098 Chemult. High mortality was demonstrated mainly in the P. c. subsp. murrayana provenance from high mountainous elevations in California and P. c. subsp. contorta from coastal regions of Oregon. Provenances from middle elevations had relatively lower mortality, especially P. c. subsp. latifolia. The pines usually were of good quality although this was not the case for defoliation and branch thickness. In comparing all plots of the series, growth was fastest at the Sofronka location in western Bohemia and slowest at the south Bohemian Mláka location. Only the best provenances of lodgepole pine can equal the domestic Scots pine (Pinus sylvestris Linnaeus). Keywords: provenance research, geographic variability, introduction, biometric measurements, increment, climatic changes Journal: Journal of Forest Science Pages: 118-128 Volume: 64 Issue: 3 Year: 2018 DOI: 10.17221/122/2017-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/122/2017-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201803-0003.txt Handle: RePEc:caa:jnljfs:v:64:y:2018:i:3:id:122-2017-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Ali BAGHERZADEH Author-Workplace-Name: Department of Agronomy and Plant Breeding, Faculty of Agriculture, Mashhad Branch, Islamic Azad University, Mashhad, Iran Author-Workplace-Name: Arid Environments Research Center, Mashhad Branch, Islamic Azad University, Mashhad, Iran Title: Assessment of land suitability for Norway maple and black locust plantations in the northeast of Iran Abstract: In the present study the qualitative land suitability evaluation by parametric and analytic hierarchy process (AHP) approaches was investigated for two tree species including Norway maple and black locust in the Toroq watershed, a semiarid region, in the northeast of Iran. The values of land suitability indices by the parametric approach for Norway maple and black locust plantations ranged from 22.46 to 67.50 and 23.23 to 75.11 respectively, while by the AHP approach they varied between 35.91 and 84.58 for Norway maple and from 32.87 to 94.31 for black locust plantations. The suitability classes for both tree species by the parametric approach were classified into moderately suitable in the eastern part of the basin, and not suitable in the middle and western parts of the study area. According to the AHP approach the suitability classes varied from highly suitable in some parts in the east to moderately suitable in the middle, east and some parts in the west and not suitable in some parts in the north and southwest of the basin. Keywords: evaluation, Toroq watershed, parametric, analytic hierarchy process, GIS Journal: Journal of Forest Science Pages: 129-138 Volume: 64 Issue: 3 Year: 2018 DOI: 10.17221/117/2017-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/117/2017-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201803-0004.txt Handle: RePEc:caa:jnljfs:v:64:y:2018:i:3:id:117-2017-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Mohammad Reza KHALEGHI Title: Application of dendroclimatology in evaluation of climatic changes Abstract: The present study tends to describe the survey of climatic changes in the case of the Bojnourd region of North Khorasan, Iran. Climate change due to a fragile ecosystem in semi-arid and arid regions such as Iran is one of the most challenging climatological and hydrological problems. Dendrochronology, which uses tree rings to their exact year of formation to analyse temporal and spatial patterns of processes in the physical and cultural sciences, can be used to evaluate the effects of climate change. In this study, the effects of climate change were simulated using dendrochronology (tree rings) and an artificial neural network (ANN) for the period from 1800 to 2015. The present study was executed using the Quercus castaneifolia C.A. Meyer. Tree-ring width, temperature, and precipitation were the input parameters for the study, and climate change parameters were the outputs. After the training process, the model was verified. The verified network and tree rings were used to simulate climatic parameter changes during the past times. The results showed that the integration of dendroclimatology and an ANN renders a high degree of accuracy and efficiency in the simulation of climate change. The results showed that in the last two centuries, the climate of the study area changed from semiarid to arid, and its annual precipitation decreased significantly. Keywords: tree ring, autoregressive standardization, temperature, precipitation, Iran Journal: Journal of Forest Science Pages: 139-147 Volume: 64 Issue: 3 Year: 2018 DOI: 10.17221/79/2017-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/79/2017-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201803-0005.txt Handle: RePEc:caa:jnljfs:v:64:y:2018:i:3:id:79-2017-JFS