Journal of Forest Science, 2018 (vol. 64), issue 3

Wood density and tracheid length of Aleppo pine (Pinus halepensis Mill.) grafts in relation to cambium age and growth rateOriginal Paper

Dafni FOTI, Costas PASSIALIS, Elias VOULGARIDIS, Apostolos SKALTSOYIANNES, Maria TSAKTSIRA

J. For. Sci., 2018, 64(3):101-107 | DOI: 10.17221/127/2017-JFS  

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...

Parameterisation of allometric equations for quantifying aboveground biomass of Norway spruce (Picea abies (L.) H. Karst.) in the Czech RepublicOriginal Paper

Tomáš Čihák, Monika Vejpustková

J. For. Sci., 2018, 64(3):108-117 | DOI: 10.17221/61/2017-JFS  

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....

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 yearsOriginal Paper

Jiří ČÁP, Petr NOVOTNÝ, Martin FULÍN, Jaroslav DOSTÁL, František BERAN

J. For. Sci., 2018, 64(3):118-128 | DOI: 10.17221/122/2017-JFS  

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...

Assessment of land suitability for Norway maple and black locust plantations in the northeast of IranOriginal Paper

Ali BAGHERZADEH

J. For. Sci., 2018, 64(3):129-138 | DOI: 10.17221/117/2017-JFS  

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...

Application of dendroclimatology in evaluation of climatic changesOriginal Paper

Mohammad Reza KHALEGHI

J. For. Sci., 2018, 64(3):139-147 | DOI: 10.17221/79/2017-JFS  

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...