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Xylogeneze buku lesního (Fagus sylvatica L.) na Drahanské vrchovině v průběhu dvou po sobě jdoucích vegetačních období
Sýkora, Štěpán
Štěpán Sýkora xylogenetics off European beech (Fagus sylvatica L.) on location Drahanská vrchovina. Bachelor thesis deal with cambial acitvity and the proces of cell differentiation of beech during two consecutive growing seasons according to weather conditions. On the research area Rájec Němčice in 2014 there was carried out on three sample trees. Sampling took place over a weekly period from 13.3. to 20.11. 2014. From taken samples were developed sustained microscopic preparations, from wich the data were obtained by using a light microscope. Monitored were the beginning, the maximum of produciton and the decrease of cambial aktivity. On the new cells there was observed the proces of the cell diferentiation from phase of radial expansion to ending of growth ring production. The obtained data were interleaved by applying the Gompertz function and the individual maximum radial additions and the period of creation of the growth ring and its parts were determined. Formula clause:nnn
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Analýza variability tvorby xylému po obvodu kmene smrku ztepilého v rámci vegetačního období
Kašpar, Miroslav
Kašpar, M.: Analysis of the variability of xylene formation along the circumference of the spruce tree (Picea abies L.) during the vegetation period. Bachelor thesis. Mendel University in Brno. 2016 The bachelor thesis is focused on the analysis of the variability of xylum formation along the circumference of spruce stem in the vegetation period. Research on xylogenetic variability was carried out on the research area in Rájci-Němčice. The main task is to compare the variability of xylan production in the same old trees during the 2016 growing season. Sampling was performed at weekly intervals from 31 March to 10 November using trephor. From the collected microwells, continuous preparations were then made. The obtained data were compared with literary sources focused on similar issues.
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Determination of stress of Norway spruce by direct methods
Krejza, Jan ; Světlík, J. ; Bellan, Michal ; Horáček, Petr
The aim of this methodology is to introduce methods of forest ground monitoring leading to evaluation of Norway spruce tree vitality. Certified methodology describes: measuring of the stem surface temperature by thermography, measuring of the sap flow, measuring the stem diameter fluctuation and by the analysis of xylogenesis and wood morphology. Emphasis was placed on the detection of the stress reaction before occurrence of the visual symptoms. The aim of this methodology is to present a comprehensive set of methods for measuring ecopysiological activity of a tree and to determine its health status. The goal of this methodology is to provide a unique tools for foresters and for forest management for direct and precise evaluation of health status of individual trees, but also a whole complexes of forest from the ground perspective. The individual methodological approaches are defined, can be used in practice and their interpretation is unambiguous. The novelty is based on the direct measurement of the physiological activity of the individual trees, which exclude any degree of subjectivity in the evaluation process.
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