Time filter

Source Type

Prague, Czech Republic

Fulin M.,Ceskd zemedelskd univerzita v Praze | Remes J.,Ceskd zemedelskd univerzita v Praze | Tauchman P.,Ceskd zemedelskd univerzita v Praze
Zpravy Lesnickeho Vyzkumu | Year: 2013

This paper deals with the growth and production potential of Grand fir (Abies grandis (Dougl. ex D. Don) Lindl.) in the territory of School Training Forest Kostelec nad Černými lesy, Central Bohemia. Research plots are located on Luvisol to Pseudogley soils on messosoic sandstones enriched with loess. As for the experimental site, mean annual temperature ranges between 7-8 °C and mean annual precipitation between 650-700 mm. The experimental plots are situated at altitudes ranging between 350-400 m. The research was conducted in 2010, within three permanent research plots, where stands were aged 35-45 years. Based on the stand inventory and growth analyses, the results were compared with measured and model data for other species-Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco), Norway spruce (Picea abies (L.) Karsten), and silver fir (Abies alba Mill.). Results confirmed considerably higher production potential of Grand fir in comparison with spruce and silver fir and at least comparable values with Douglas-fir. Based on the growth analysis it is possible to consider Grand fir as fast growing tree species.

Spulak O.,Vyzkumny ustav lesniho hospoddrstvi a myslivosti | Vitamvas J.,Ceskd zemedelskd univerzita v Praze | Kacalek D.,Vyzkumny ustav lesniho hospoddrstvi a myslivosti | Kunes I.,Ceskd zemedelskd univerzita v Praze
Zpravy Lesnickeho Vyzkumu | Year: 2011

Liming is considered a measure to support vigor of tree species in the air-polluted areas. T e objective of our study is to f nd out if spot liming at the time of planting can inf uence photosynthesis and leaf chemistry 17 years af er application. An experiment with artif cially planted European beech was established in 1993. Samples of beech leaves were collected three times in May, June and July 2009. Analyzes used were as follows: 1) Chlorophyll a f uorescence using Imaging PAM, 2) contents of chlorophyll and carotenoids being extracted from assimilatory tissues using a spectrophotometer and 3) contents of nutrients (N, P, K, Ca, Mg, S and Si) in leaves. Data were processed using T-test or one-way ANOVA followed by Tukey test. Spot-limed treatment shows dif erence only in mature leaves being collected in July. T ere was a signif cantly higher maximum quantum yield (F /F = 0.867) in limed leaves compared to control treatment (F /F = 0.860). Contents of chlorophylls (Chla+b 2,369 μg.g-1) and carotenoids (Carx+c 590 μg.g1) were also signif cantly higher in raw matter of the limed beeches compared to control treatment (Chla+b 2,268 μg.g1; Car 552 μg.g1). Among the elements analyzed in the leaves, the only dif erence was found in content of phosphorus between the limed (0.15%) and control (0.13%) treatments.

Sticha V.,Ceskd zemedelskd univerzita v Praze | Matejka K.,Karel Matejka IDS | Bilek L.,Ceskd zemedelskd univerzita v Praze | Malik K.,Ceskd zemedelskd univerzita v Praze | Vacek S.,Ceskd zemedelskd univerzita v Praze
Zpravy Lesnickeho Vyzkumu | Year: 2013

The study deals with analysis of natural regeneration in the selected climax spruce stands in the šumava Mts., southern Bohemia. Six transects of size 5 m × 50 m situated at right angles to the contour lines were established. All individuals of tree regeneration up to the height of 3 m were mapped using Field-Map technology. Tree species and total height of individuals were recorded. The amount of regeneration is relatively low; nevertheless, in average 1,493 individuals per ha occurring in the area is a sufficient number for the formation of complex tree layer of climax spruce stand. In the M12 and M13 plots, absolute numbers of tree regeneration individuals were relatively low (440 and 920 ind. per ha). Mean height values ranged from 56 cm (M12 - Picea abies) to 173 cm (M15 - Sorbus aucuparia). The distribution of individuals in height classes is unequal, often asymmetrical.

Discover hidden collaborations