Journal of Forest Science, 2016 (vol. 62), issue 7
Spatial pattern of relict beech (Fagus sylvatica L.) forests in the Sudetes of the Czech Republic and PolandOriginal Paper
D. Bulušek, Z. Vacek, S. Vacek, J. Král, L. Bílek, I. Králíček
J. For. Sci., 2016, 62(7):293-305 | DOI: 10.17221/22/2016-JFS 
Horizontal structure of forest stands largely affects the competitive relationships between tree individuals and plays a significant role in the stand dynamics. The present study describes horizontal structure on nine permanent research plots (0.24-0.25 ha) in the regeneration and tree layer of autochthonous European beech (Fagus sylvatica Linnaeus) stands in the wide altitudinal gradient in protected areas in the Czech Republic and Poland. The spatial structure was classified in productive herb-rich beech sites, through acidophilic beech sites, exposed sites, to beech fragments near the timberline. The spatial pattern of tree layer...
Effects of different irradiance levels on peroxidase activities in Quercus castaneifolia C.A. Mey. seedlings from different provenancesOriginal Paper
F. Babaei, S.G. Jalali, H. Sohrabi, A. Shirvany
J. For. Sci., 2016, 62(7):306-313 | DOI: 10.17221/118/2015-JFS
To understand the function of peroxidase (POD) in relation to a light gradient, changes in POD activity were studied in five different provenances of chestnut oak seedlings. An experiment was conducted in controlled conditions and six different irradiances (10, 20, 30, 50, 60, and 70% of full light) were considered. According to the results, POD activity was strongly related to irradiance and showed a decreasing response to light, with the largest changes at low light (10 to 30%) and a levelling-off at high light (50-70%). Five provenances were also significantly distinguished at 10-30% of full light. The gel analysis showed that there were several...
Treatment of rubberwood (Hevea brasiliensis) (Willd. ex A. Juss.) Müll. Arg. with maleic anhydride to prevent mouldsOriginal Paper
K. Oldertrøen, A. H-Kittikun, S. Phongpaichit, S. Riyajan, R. Teanpaisal
J. For. Sci., 2016, 62(7):314-321 | DOI: 10.17221/109/2015-JFS
The rubberwood samples were treated with 0.5-10% maleic anhydride (MA) solutions. The treatment of wood with 2.5% MA was adequate to prevent the growth of moulds on wood for 1 year at least. The viable count of Aspergillus niger van Tieghem PSU1 on MA treated wood indicated that fungal spores were not killed. The maleic anhydride treated wood slices had no antifungal activity. The concentration of MA released from treated wood in the leachate was 0.02 mg.m-3. Agar well diffusion showed that the leachate from MA treated wood had no antifungal activity. However, after leaching MA treated wood still had a high resistance to mould growth....
Root rot and damping-off of Aleppo pine seedlings caused by Pythium spp. in Algerian forest nurseriesOriginal Paper
F. Lazreg, L. Belabid, J. Sánchez, E. Gallego
J. For. Sci., 2016, 62(7):322-328 | DOI: 10.17221/66/2014-JFS
Aleppo pine (Pinus halepensis Miller) is a common forest tree in the Mediterranean Region. Production of Aleppo pine seedlings is hindered by damping off and root rot diseases in cooler conditions of north-western Algeria, which significantly reduces the seedling emergence. This work was carried out to evaluate the pathogenicity of different Pythium Pringsheim species on Aleppo pine seedlings. Seventeen isolates of Pythium spp. were isolated from diseased seedlings, identified to the species level based on DNA sequence from the internal transcribed spacer region and their identity was confirmed on morphological basis. The...
The structure of Scots pine and Black locust forests in the Northern Steppe of UkraineOriginal Paper
V. Lovinska, S. Sytnyk
J. For. Sci., 2016, 62(7):329-336 | DOI: 10.17221/120/2015-JFS
The article describes the distribution of areas of Scots pine (Pinus sylvestris Linnaeus) and Black locust (Robinia pseudoacacia Linnaeus) stands within the Northern Steppe of Ukraine based on forest biometry data. The total area of Scots pine stands is 21,472.9 ha, of Black locust it is 17,683.7 ha, which corresponds to 24.6 and 26.9% of the total forest-covered area. Scots pine is partly naturally, partly artificially regenerated. Black locust stands are man-made forests only. Both species form mainly pure stands within the study area. Mean age of Scots pine is around 60 years with a mean wood stock of 292 m3.hа-1....
Predicting the earthwork width and determining the annual growth loss due to forest road construction using artificial neural network and ArcGISOriginal Paper
S. Peyrov, A. Najafi, A.R. Nourodini
J. For. Sci., 2016, 62(7):337-344 | DOI: 10.17221/110/2015-JFS
The area of forest destruction as well as the annual growth loss due to road construction before constructing a road was predicted. To do this, road cross sections of 88 points along the 10 km proposed road were predicted using Multilayer Perceptron Neural Network with two input parameters of hillside slope and rock share within MATLAB software. Then according to the predicted width, the area of road earthwork as well as the area of roadside with a 10 m width was calculated in ArcGIS software. Finally, by overlaying the inventory network layer on the road map and by knowing the annual growth (m3) for each plot the growth loss of the area...