Journal of Forest Science, 2011 (vol. 57), issue 4
Available nitrogen in the surface mineral layer of Serbian forest soils
Ž.S. Dželetović, R.N. Pivić, N.L.J. Djurović
J. For. Sci., 2011, 57(4):131-140 | DOI: 10.17221/109/2010-JFS 
Based on a greenhouse experiment, we evaluated nitrogen availability in the surface mineral layer of soil under various deciduous forest stands by analysing the following soil characteristics: total organic C, total N, initial content of easily available N inorganic forms, mineralized N content obtained by aerobic and anaerobic incubations and A-value. The experiment was performed on a test plant and through the application of urea enriched with 5.4% 15N.The studied forest soils are characterized by high mineralization intensity and high N availability indices. Aerobic incubation appears to be the most appropriate method for evaluating the available...
Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts.
J. Pecháček, D. Vavříček, P. Samec
J. For. Sci., 2011, 57(4):141-152 | DOI: 10.17221/38/2010-JFS
The main objective of this study was to investigate the causes of nutrient deficiency symptoms in Norway spruce (Picea abies [L.] Karst.) underplantings in the Hrubý Jeseník Mts. In the area concerned 19 research plots were established, representing the ridge sites of the 8th FAZ of acid edaphic categories. On these plots samples were taken from topmost soil horizons and needle samples were collected in two series - from healthy and from damaged trees. The results of this study demonstrate that the nutrient deficiency symptoms and reduced vitality of evaluated underplantings were caused by the insufficient uptake of main nutrients (Mg, P,...
Evaluation of twenty-years-old pedunculate and sessile oak provenance trial
V. Buriánek, M. Benedíková, J. Kyseláková
J. For. Sci., 2011, 57(4):153-169 | DOI: 10.17221/117/2010-JFS
This paper deals with the measurement and evaluation of pedunculate and sessile oaks on five provenance trial plots located in the forest regions Západočeská pahorkatina, Jihočeská pánev, Hornomoravský úval, Dolnomoravský úval, Bílé Karpaty and Vizovické vrchy at the age of 20 years. Height and diameter growth were measured and analysed and the quality of tree stems was recorded. Sampled seeds originated from certified stands for seed production located in the Hercynian and Carpathian regions of the Czech Republic. Differences between the two species result from their ecological requirements. A comparison of the two species indicates that pedunculate...
Evaluation of physiological and health state of Norway spruce plants with different growth rate at juvenile stage after outplanting at mountain locations
A. Jurásek, J. Leugner, J. Martincová
J. For. Sci., 2011, 57(4):170-177 | DOI: 10.17221/110/2010-JFS
Norway spruce (Picea abies [L.] Karst.) seedlings grown from seed originating from high mountain locations (8th forest altitudinal zone - Norway spruce vegetation zone 1,000-1,250 m a.s.l.) show higher growth variability than seedlings from populations adapted to more favorable conditions at a lower altitude a.s.l. Seedlings smaller than 8 cm in height were usually culled during sorting before transplanting (in common nursery practice) regardless of the fact whether it was not planting material from high mountain locations. This paper presents the results of the physiological and health state of 16 year old spruce stands established...
Importance of logging technologies for economic effectiveness of tending Norway spruce stands
P. Zehnálek, J. Remeš, K. Pulkrab
J. For. Sci., 2011, 57(4):178-184 | DOI: 10.17221/113/2010-JFS
This article examines the impact of modern harvesting and hauling technologies on the economic effectiveness of tending Norway spruce stands. The analysis of more than 70 tending treatments showed how fundamental the choice of technology is with respect to the impact of tending treatments. The introduction of harvesters and forwarders, compared with traditional technologies, conclusively demonstrated a higher gross profit per unit area (CZK.ha-1) as well as per unit volume of harvested timber (CZK.m-3). In addition, the paper demonstrated economic effectiveness even in the first thinning operations in relatively young stands (30...