Journal of Forest Science, 2014 (vol. 60), issue 3

Effect of planting interval and soil type on qualitative and quantitative characteristics of poplar (Populus nigra) plantations in Diwandareh (Kurdistan province, western Iran)Original Paper

A. Alijanpour, A.B. Shafiei, R. Latify

J. For. Sci., 2014, 60(3):89-95 | DOI: 10.17221/9/2014-JFS  

We investigated the effects of planting interval and soil type on qualitative and quantitative characteristics of seven poplar (Populus nigra) plantations with 1 × 1 m and 2 × 2 m planting intervals in Diwandareh. Parameters including diameter at breast height (DBH), total height, crown height, stem height, number of suckers and crown vitality were measured and compared regarding soil characteristics and planting intervals. A transect method with 10% sampling intensity was used for collecting data. Results showed significant differences in the qualitative and quantitative characteristics of poplar trees between planting intervals and soil...

Phenotype features in juvenile populations of Picea abies and their growthOriginal Paper

K. Matějka, J. Leugner, V. Krpeš

J. For. Sci., 2014, 60(3):96-108 | DOI: 10.17221/77/2013-JFS  

The young populations of Norway spruce (Picea abies) can be evaluated in terms of both variability in the quantitative characteristics and share of different phenotypes according to the needle types. A set of two-years-old seedlings produced in the nursery and several populations of natural regeneration in the Krkonoše Mts. and the Krušné hory Mts. were evaluated using the needle anatomy, size and colour. The tree height growth was measured simultaneously. The growth was related to some needle features. Four basic anatomical types of needles were distinguished in the mountain Norway spruce seedlings: flat needles, intermediate needles, inversion...

Modelling of forest road sediment in the northern forest of Iran (Lomir Watershed)Original Paper

P. Dalir, R. Naghdi, V. Gholami

J. For. Sci., 2014, 60(3):109-114 | DOI: 10.17221/91/2013-JFS  

Forest roads are the most important ways of access; nevertheless, they are the main source of sediment production. The delivered sediment by forest roads causes environmental problems and pollution of water resources. This study has been done to present a model for estimating the sediment yield of forest road using a multiple regression analysis on the Caspian southern coasts (north of Iran, Lomir watershed). For this purpose, 45 wood dams were created and their sediment volume (dependent variable) was measured. The following independent variables were estimated: road length, road width, road slope, vegetation cover, height of cut slope and road age....

Pathogenicity of Fusarium spp. associated with diseases of Aleppo-pine seedlings in Algerian forest nurseriesOriginal Paper

F. Lazreg, L. Belabid, J. Sanchez, E. Gallego, B. Bayaa

J. For. Sci., 2014, 60(3):115-120 | DOI: 10.17221/65/2013-JFS  

In northwestern Algeria, the production of Aleppo pine (Pinus halepensis Mill.) seedlings in four nurseries is hindered by the damping-off disease. Results obtained indicated that Fusarium spp. are commonly found on diseased seedlings, in most containers and bare-root nurseries. Twenty-one isolates of Fusarium, belonging to seven species, were previously isolated from diseased seedlings, and identified based on their morphological and molecular characteristics and their sequences had been deposited in NCBI-Genbank. These isolates were tested for their pathogenicity to local Aleppo pine seeds. The highest inhibition was observed...

Ca/Al ratio in Norway spruce fine roots on monitoring plots in the Czech RepublicOriginal Paper

V. Šrámek, V. Fadrhonsová, L. Jurkovská

J. For. Sci., 2014, 60(3):121-131 | DOI: 10.17221/85/2013-JFS  

This article is focused on the evaluation of the Al/Ca ratio in fine roots of Norway spruce on the plots belonging to the ICP Forests monitoring programme in the Czech Republic. In total 122 fine root samples were collected from twenty plots from two soil layers of 0-10 and 10-20 cm and then analysed. The mean Ca/Al molar ratio in the fine roots from the 0-10 cm topsoil layer is higher than in the lower 10-20 cm soil layer, which corresponds to the distribution of fine roots - on average 80% of fine roots were found in the topsoil. 6% of the samples in the lower soil layer strongly indicate aluminium stress (Ca/Al < 0.1) and 30% of the samples may...