Journal of Forest Science, 2015 (vol. 61), issue 9
Changes in the body mass of Megaphyllum kievense (Diplopoda, Julidae) and the granulometric composition of leaf litter subject to different concentrations of copperOriginal Paper
V. Brygadyrenko, V. Ivanyshyn
J. For. Sci., 2015, 61(9):369-376 | DOI: 10.17221/36/2015-JFS 
This article discusses the results of a 30-day experiment investigating the influence of copper which was introduced into the natural diet of Megaphyllum kievense (Lohmander, 1928) at concentrations of 10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7 and 10-8 mg Cu.g-1 dry leaf litter upon the body mass of the species. With copper contamination at a concentration 10-1 mg Cu.g-1 leaf litter the gain in body mass of M. kievense decreased by 69.8% (from 2.45 ± 1.28 to 0.74 ± 1.73 mg/individual per month). With...
Scolytus koenigi Schevyrew, 1890 (Coleoptera: Curculionidae): new bark beetle for the Czech Republic and notes on its biologyOriginal Paper
J. Kašák, J. Foit, O. Holuša, M. Knížek
J. For. Sci., 2015, 61(9):377-381 | DOI: 10.17221/65/2015-JFS
In November 2013, Scolytus koenigi Schevyrew, 1890 was recorded for the first time in the territory of the Czech Republic (Southern Moravia, at two localities near the village of Lednice). This finding represents the northernmost occurrence of this species in Central Europe. Because the knowledge of the S. koenigi bionomy is very limited, the characteristics of 52 galleries on 10 different host tree fragments were studied. The species was found to develop on dead or dying branches and thin trunks of maples Acer campestre L. and Acer platanoides L. with diameters of 3‒12 cm. All of the galleries comprised a...
The quality and the depth of dormancy of beechnuts in individual stand groups with varying climatic conditions within a single unit of approvalOriginal Paper
L. Bezděčková, K. Matějka
J. For. Sci., 2015, 61(9):382-392 | DOI: 10.17221/44/2015-JFS
The goal of this study was to analyse the quality and dormancy of beechnuts originating from different harvesting sites within large UA and to determine the homogeneity of seed lots from large-scale areas. Currently, European beech (Fagus sylvatica L.) accounts for 7.21% of the forested area of this country. Almost 24,000 ha of beech are registered as units of approval (UA) for harvesting of reproductive material. About 40% of these UA are made up of areas of 10 ha consisting of stands with different micro-sites. Beechnut dormancy and thus the chilling requirements for the rate of germination are affected by provenance and weather conditions...
Effects of rubber-tired skidder and farm tractor on physical properties of soil in plantation areas in the north of IranOriginal Paper
M. Nikooy, S. Ahrari, A. Salehi, R. Naghdi
J. For. Sci., 2015, 61(9):393-398 | DOI: 10.17221/125/2014-JFS
Physical properties of soil can be affected by machines that are used for skidding which have the potential to impact soil sustainability and forest productivity. The present study evaluated the effect of timber skidding by a rubber-tired skidder and farm tractor on the soil physical properties. The study site was located in Hafdaghanan plantation region in the north of Iran. Two treatments that consisted of skidding by HSM 904 skidder and ITM285 farm tractor equipped with trailer were applied. The trails were included in three traffic levels: primary, secondary and tertiary. Treatment effects were tested using analysis of variance (ANOVA) with skidding...
Influence of the mineral rock alginite on survival rate and re-growth of selected tree species on agricultural landOriginal Paper
M. Tužinský, I. Kupka, V. Podrázský, H. Prknová
J. For. Sci., 2015, 61(9):399-405 | DOI: 10.17221/11/2015-JFS
The objective of this work is to evaluate the effect of alginite on the growth parameters of seedlings of Douglas-fir, Scots pine and line mixture of pedunculate oak, red oak and Norway maple (broadleaves) on former agricultural land with an unfavourable hydrophysical regime. The research plot consists of 36 sub-plots, each sub-plot has a size of 400 m2. The following doses of alginite were applied: control (variant A without alginite), 0.5 kg of alginite (B) and 1.5 kg of alginite (C) when planting both conifers and mixtures of broadleaves. Number of seedlings on the sub-plots was 400 individuals, only in the case of Douglas-fir the number...
Root system development in naturally regenerated Douglas-fir saplings as influenced by canopy closure and crowdingShort Communication
Ch. Kuehne, Ch. Karrié, D.I. Forrester, U. Kohnle, J. Bauhus
J. For. Sci., 2015, 61(9):406-415 | DOI: 10.17221/53/2015-JFS
Documented information on the growth dynamics and related silvicultural manipulation of naturally regenerated Douglas-fir beneath a canopy shelter is scarce. We hypothesized that long regeneration phases creating dense cohorts of Douglas-fir advanced regeneration beneath a closed canopy of mature trees have a negative impact on the formation of a stable root system. We therefore studied the influence of shading and competition on root system characteristics of 28 naturally regenerated, ca 3 m tall Douglas-fir saplings growing either without immediate competitors or in dense neighbourhoods, and these situations were located either beneath a closed...