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1

Dynamika poskozeni reliktnich boru v CHKO Broumovsko

100%
Vacek S., Podrazsky V.
Szczeliniec
|
1996
159-165
2

Stav lesnich pud nad piskovcovych utvarech v CHKO Broumovsko

100%
Podrazsky V., Vacek S.
Szczeliniec
|
1996
95-100
3

Struktura a vyvoj prirodnich smrkovych porostu v Krkonosich

100%
Vacek S., Podrazsky V.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
|
1998
|
tom 56
4
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Charakterystyka roślinności runa kształtującej się pod drzewostanami daglezjowymi (Pseudotsuga menziesii (Mirb.) Franco.) w lasach gospodarczych Republiki Czeskiej

81%
Viewegh J., Podrazsky V., Matejka K.
Sylwan
|
2014
|
tom 158
|
nr 04
The aim of study was to characterize Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) commercial stands and their influence on the forest floor plant communities. Study plots were performed in different regions of the Czech Republic. In total 44 plots were arranged in older Douglas fir stands with well developed forest floor vegetation. For the comparison, the study plots were also established in Norway spruce and broad−leaved tree species (beech, linden, oak) stands. Compared to other studied species, the main effect of Douglas fir on plants was noted in higher share of nitrophilous species.
5

Działanie wolno rozpuszczalnych tabletek nawozowych na plantacjach świerka i buka

71%
Rems J., Zahradnik D., Podrazsky V., Kubicek J., Narovec V.
Las Polski
|
2005
|
nr 12
6

Mozliwosci zastosowania nawozenia w gospodarce lesnej [2]

70%
Podrazsky V., Remes J., Kratochvil J.
Las Polski
|
1999
|
nr 06
16-17
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Gap regeneration in near-natural European beech forest stands in Central Bohemia - the role of heterogeneity and micro-habitat factors

61%
Bilek L., Remes J., Podrazsky V., Rozenbergar D., Diaci J., Zahradnik D.
Dendrobiology
|
2014
|
tom 71
Gap regeneration in a European beech (Fagus sylvatica L.) forest reserve was analyzed in relation to within-gap resource heterogeneity and ground vegetation competition. The study was carried out in two one-hectare permanent research plots (PRP) which included five smaller research plots (RP) encompassing two large gaps (500–700 m2), two small gaps (300–400 m2), and location under canopy. The coverage of woody regeneration, ground vegetation, dead wood, seedling density in eight height classes, characteristics of dominant trees of the beech regeneration, and the total thickness of holorganic horizons were measured. Soil moisture and light conditions were also assessed in selected sample plots. The relative direct and diffuse light was estimated by hemispherical photography. Small gaps showed both the highest cover of tree regeneration and the highest density of individuals per hectare. Slightly less regeneration was recorded in large gaps, while under closed canopy, regeneration densities were 5–10 times lower than in small gaps. Beech regeneration cover and the size (diameter and height) of dominant beech seedlings were positively related to relative diffuse light and negatively related to ground vegetation cover. The latter was positively related to diffuse light and soil moisture content. A pronounced statistically significant contrast in the cover and size of beech regeneration in relation to micro-site conditions (diffuse light, cover of graminoids) was only confirmed between sample plots located below canopy cover and those within gaps. Graminoids, in particular Calamagrostis epigejos L., occurred mainly in the large gap centre and along the southernmost edge of the large gap, increasing competition for resources here. The cumulative cover of ground vegetation and regeneration was relatively low (9–56%) compared with more mesic natural beech forests. The indicated negative influence of direct light at the northern gap edge suggests that extension of gaps on comparable sites in managed forest should not proceed in this direction.
8

Mozliwosci zastosowania nawozenia w gospodarce lesnej [1]

60%
Podrazsky V., Remes J., Kratochvil J.
Las Polski
|
1999
|
nr 05
13-14
9

Effect of tree layer and microsite on the variability of natural regeneration in autochthonous beech forests

51%
Vacek Z., Vacek S., Podrazsky V., Bilek L., Stefancik I., Moser W. K., Bulusek D., Kral J., Remes J., Kralicek I.
Polish Journal of Ecology
|
2015
|
tom 63
|
nr 2
European beech is a superior competitor among the trees of Central Europe, often growing in pure stands. We proposed a hypothesis, that once beech has reached dominance in forest community, it's recruitment could become limited due to the gradual accumulation of pathogens attacking seeds and seedlings. We employed data on seed production and germination along with a field experiment to estimate the germination success of beech in two old-growth forests. Beech produced more seeds than the co-occurring coniferous trees, but less than 1% of beechnuts germinated in the next season. In the field experiment, the percentage of decayed beechnuts was 57% in the Carpathians and 61% in the Alps. Most of the dead germinants and decayed beechnuts were infested by fungi. The average number of fungal colonies per one sample in the Carpathians was significantly higher after mast year than one year before, while the differences between the Alps and Carpathians after mast years were statistically not significant. Fungi have been isolated from practically all dead beechnuts and dead germinants. The number of beechnuts per seed trap, the number of germinants around it and the relative number of fungal colonies obtained from plastic boxes placed in the same sample plot were not significantly correlated. The mortality of germinants continued throughout the spring; the number of life germinants in the middle of May amounted to 0.87% of the initial number of beechnuts in the Carpathians and only 0.28% in the Alps. High rates of beechnut and germinant mortality could probably offset the huge reproductive effort of European beech in old-growth stands and limit the possibility to attain absolute dominance by that species. However, our hypothesis that the build-up of fungal pathogens on the forest floor old-growth stands is able to stop the regeneration of beech still needs to be tested using larger data sets.
10
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Structural diversity and production of alder stands on former agricultural land at high altitudes

51%
Vacek Z., Vacek S., Podrazsky V., Kral J., Bulusek D., Putalova T., Balas M., Kalouskova I., Schwarz O.
Dendrobiology
|
2016
|
tom 75
The paper deals with the structural diversity and production of a less frequently studied type of alder stands originated on former agricultural lands in the 1950s, established partly by plantation and partly by natural succession in the area of the Krkonoše Mts. and the Orlické hory Mts. (Czech Republic). Four permanent research plots (PRP) were established at sites where Black alder (Alnus glutinosa L. Gaertn.) and Grey alder (Alnus incana L. Moench.) naturally occurs, each plot of 0.25 ha in size. The aim of the study was to evaluate the structure and development of the alder stands with respect to biodiversity, horizontal, vertical and species structure, diameter increment with emphasis on climate factors, and the quantity and quality of timber production. The results document low diversification of the studied stands in the PRPs. The horizontal structure is defined as random and clumped at sites at the highest altitude with high water table. The number of living trees with DBH ≥ 4 cm ranges between 556 to 828 trees ha-1 with the relative stand density index (SDI) 0.67–0.77. The stand volume ranges from 247 to 393 m3 ha–1, and decreases with higher altitudes. Low temperatures is limiting factor for radial growth in the high mountain areas, respectively low precipitation in the middle lands. Owing to a rather specific site character, as especially the spring area, the stands exhibit only average production, but the production quality is generally high. The quality timber is suitable for industrial use; the rot-affected trunk base parts usable for fuel represent only approximately 16%.
11
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Effects of environmental factors and management on dynamics of mixed calcareous forests under climate change in Central European lowlands

42%
Vancura K., Simkova M., Vacek Z., Vacek S., Gallo J., Simunek V., Podrazsky V., Stefancik I., Hajek V., Prokupkova A., Kralicek I.
Dendrobiology
|
2022
|
tom 87
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