Journal of Forest Science, 2021 (vol. 67), issue 3
Impact of silvicultural system on natural regeneration in Western Himalayan moist temperate forests of PakistanOriginal Paper
Javed Iqbal
J. For. Sci., 2021, 67(3):101-112 | DOI: 10.17221/124/2020-JFS 
Site conditions (topography, aspect, moisture availability, humus thickness, light exposure, and grazing activities) play a vital role in the germination and regeneration process. The research was conducted in the Himalayan moist temperate forest. The research site was divided based on the silvicultural system (group selection system and single-tree selection system) into 148 plots and 150 plots, respectively. The group selection system was examined on the site of 2 ha which was clear-felled under a project in the 1980's. The present study examined the impact of silvicultural systems on regeneration. The frequency table was used, and relative frequency...
Effect of site conditions on the properties of hawthorn (Crataegus azarolus L.) woodOriginal Paper
Noorollah Nazari, Mohsen Bahmani, Saleh Kahyani, Miha Humar
J. For. Sci., 2021, 67(3):113-124 | DOI: 10.17221/125/2020-JFS
This study investigated the influence of site conditions on the physical and morphological properties of hawthorn (Crataegus azarolus L.) wood grown in Zagros forests of Iran. Hawthorn is a valuable woody species in Iran's Zagros forests with data deficiency in its wood properties. To our best knowledge, there is no study on the properties of hawthorn wood. Twenty-seven mature trees were randomly chosen and sampled at three altitude levels (1 800-2 000, 2 000-2 200, and 2 200-2 400 m) in the Bazoft region of Chaharmahal Va Bakhtiari, Iran. Dry wood density, volumetric shrinkage, fibre length, fibre diameter, cell wall thickness were then determined....
Differences in water relations and total carbohydrate content between precommercially thinned and unthinned Pinus nigra subsp. pallasiana standsOriginal Paper
Ayşe Deligöz, Esra Bayar, Musa Genç, Yasin Karatepe
J. For. Sci., 2021, 67(3):125-133 | DOI: 10.17221/132/2020-JFS
Variations in seasonal responses in water relations and total carbohydrate content (TCC) in one-yearold shoots from precommercially thinned (PCT) and unthinned Anatolian black pine stands were assessed during three seasons (sampling in May, July and September) in 2015-2017. Three different treatments were established: unthinned control with 4 941 stems.ha-1 and two thinned spacing levels (2-2.5 and 3-3.5 m) where 2 133 stems.ha-1 and 1 093 stems.ha-1 were left, respectively. Differences in osmotic potential at turgor loss point (ΨπTLP) between the thinned and unthinned plots appeared only during a water shortage...
How to accelerate the germination of Scots pine and Norway spruce seeds?Original Paper
Kateřina Houšková, Jan Klepárník, Oldřich Mauer
J. For. Sci., 2021, 67(3):134-142 | DOI: 10.17221/133/2020-JFS
The aim of the study was to confirm and compare efficiency of methods enhancing the vitality of Scots pine and Norway spruce seeds: soaking in water, cold stratification, additional moistening and incubation according to IDS method. The examined parameters included water content in the seeds, germination energy, mean germination time and germination capacity before the seed treatment, after its treatment by the tested methods and after drying. Results show that all the tested methods accelerate germination of seeds; cold stratification is the most efficient and recommended method for Scots pine and soaking of seeds in water is the most efficient and...
Spatial and compositional structure of European oak urban forests in Kyiv city, UkraineOriginal Paper
Maksym Matsala, Andrii Bilous, Roman Feshchenko, Raisa Matiashuk, Svitlana Bilous, Yaroslav Kovbasa
J. For. Sci., 2021, 67(3):143-153 | DOI: 10.17221/173/2020-JFS
Forest dimensional structure and tree species composition strictly define ecosystem resilience, success of its functioning and development. Spatial structure of forest compartments provides an additional information on the forest stand heterogeneity. The aim of this study is to examine structural patterns (both spatial and nonspatial ones) in European oak (Quercus robur L.) urban forests located in Kyiv city, Ukraine. We compared two middle-aged (~ 80 years) and two mature (~ 180 years) oak stands in terms of structural metrics collecting a data from geo-referenced trees on the established permanent sample plots. Younger stands reached similar...