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Growing of the red oak in the conditions of Czech Republic
Miltner, Stanislav ; Kupka, Ivo (advisor) ; Tomášková, Ivana (referee)
The study analyses growth and development of Northern red oak stands in the Czech Republic. The Northern red oak stands under study have the age span between 17 to 159 years. The study also investigated the influence of the species on soil upper horizons. The results show the high wood production potential of red oak when compare to sessile oak being at the same or higher quality and health. Data show slower decomposition of biomass in upper soil horizons under red oak causing acid reaction of soils. The data propose the red oak to be a good additional species in lowland stands and it could be a species which substitutes domestic oaks where tracheomycosis diseases can occur
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Evaluation of taste repellents for protection of tree planting stock from deer browsing
Triner, Libor ; Kuneš, Ivan (advisor) ; Kupka, Ivo (referee)
The main goal of this thesis is to assess the efficacy of two repellent products with active ingredients denatonium benzoate and capsaicin to protect the newly established forest tree planting prior to browsing damage by wild game. Repellents were tested on two different experimental plots planted with silver fir (Abies alba). Application of repellents held in three terms and total three times were the damages, which were included in the framework of the six-rating scale, has been detected. The effectiveness of these repellents has been demonstrated already during the second term damage assessments caused by game. During the more than 14-month experiment was damaged almost 2.5 times fewer seedlings treated with repellents based on denatonium benzoate and capsaicin than untreated seedlings, serving as a control. The most common form of damage to the tree was bitten off terminal bud with little scope of additional damage. Damage to seedlings by game differed significantly even within the investigated areas. Use of repellents did not affect the physiological death of seedlings. It was justify the conclusion that most of the damages were caused by roe deer (Capreolus capreolus). Based on several scientific papers on the efficacy of repellent products based on capsaicin and denatonium benzoate was concluded that the main active ingredient in tested repellents is capsaicin.
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Root system morphology of bare root and containerized beech and oak plants
Becher, Vladimír ; Kupka, Ivo (advisor) ; Bílek, Lukáš (referee)
The thesis follows the bachelor thesis on comparison of morphological and economic parameters of various types of seedlings, which resulted in the planting of containerized and bare root seedlings of the European beech (Fagus sylvativa Linne) and the English oak (Quercus robur Linnaeus) in a forest regeneration in September 2011 and April 2012.
The measurement of the height and thickness of the root neck of the seedlings was carried out on designated plots in March 2015. I also investigated possible mortality from the afforestation inspection in July 2012. Furthermore, 154 seedlings, 84 containerized seedlings a 70 bare root seedlings, in order to evalutate the development of the root system, its possible deformation and subsequently detection of the volume by using xylometric method. The data collected in the field were processed into tables and compared with the results observed in the bachelor thesis.
The average figures for the height, the thickness of the root neck and the volume of the root system showed almost identical development of bare root and containerized seedlings in the forest cover, even though the figures of individual seedlings were highly variable. When reviewing the development of the root system, I found unacceptable deformation of the main taproot at 25% containerized seedlings and 20% bare root seedlings. The remaining seedlings were without deformation or with acceptable deformation of the taproot (wavy taproot, unbalanced taproot with the axis in the above-ground part, an outgrowth).
It was discovered that containerized seedlings were more easily removable from the ground, the seedlings were not sufficiently fixed in the ground and its root system was in some cases less developed than it was with bare root seedlings. This may be influenced by several factors, e.g. the influence of richness of the root system on fine roots, the obstruction of development of the root system by cementing the surrounding soil when using the slit method.
The bare root seedlings, the English oak in particular, showed root development to a greater depth, which is very important not only for sealing but also as an important factor in the drought season and extreme summer temperatures when there is rapid exhaustion of the moisture in the upper horizon of the soil due to the vapor.
Unfortunately, it was not possible to verify these findings in a larger sample size, as there had been major damage of the forest.
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Silver fir growth depending on altitude and slope exposition in National park Krkonoše
Zapadlo, Jan ; Kupka, Ivo (advisor) ; Baláš, Martin (referee)
This Master thesis deals with a dynamic of planting development of silver fir (Abies Alba Mill.) depending on an altitude and exposure in the mountain conditions of the western part of the Krkonose (Giant Mountain) National Park. Further it examines the influence of a tree age, average temperature and precipitation amounts on such a development.
Annual silver fir height increments have been compared on the four selected sites which differ from each other, in particular, by their altitude but other characteristics have been considered as well. Analyses proved that there were significant statistical differences between an average height increments on these sites. Through the methods of correlation and regression analyses impacts of other factors on the said differences along with the intensity of such impacts have been identified. In addition to the altitude a factor of an average temperature, precipitation amount during a given period and a tree age have been determined. Whilst examining the dependency of fir development using more factors simultaneously a linear regression model of dependency between the fir height increments and joint effects of the aforementioned factors has been created.
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Problematika péče o lesy v okolí hl. m. Prahy s ohledem na formy jejich funkčního využívání
Česká zemědělská univerzita v Praze, Fakulta lesnická a environmentální, Katedra pěstování lesů, Praha ; Vyskot, Ilja ; Matějka, Karel ; Zdražil, Vladimír ; Kašparová, Ivana ; Pulkráb, Karel ; Kupka, Ivo ; Podrázský, Vilém
Projekt řeší vymezení oblasti příměstských lesů hl. m. Praky na základě současného stavu, dosavadních přístupů řešení a na základě exaktně formulovaných požadavků na plnění rekreačních funkcí lesa. Ve zprávě jsou definovány rámcové směrnice účelového hosppodaření v příměstských lesích a uvedeny modelové situace diferencovaného hopodaření v oblasti příměstských lesů.
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