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Xylogeneze buku lesního (Fagus sylvatica L.) na Drahanské vrchoviněOsička, Václav January 2013 (has links)
No description available.
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Dekompozice dřeva v horských temperátních lesích a jeho dopad na pedogeneziPaták, Ondřej January 2018 (has links)
This thesis deals with the monitoring of the impact of decaying wood on the soil characteristics and the related development of the soil profile. The subject of the research is the soils in the Žofínský prales National Nature Reserve in Novohradské mountains, with the predominant European Beech (Fagus sylvatica L.). Samples taken under the decaying stems are compared with the control samples of soils with the predominant leaf layer on the surface. In the soil beneath the beech stems, a significantly higher carbon content, higher pH, higher nutrient concentrations, lower exchange acidity, and mostly lower Al and Fe content were found. Decaying wood most affected the horizon A, more intense podzolization was not detected unambiguously.
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Monitoring tvorby dřeva a lýka buku lesního (Fagus sylvatica L.) na buněčné úrovni na výzkumné ploše Rájec - HolíkovVeteška, Ondřej January 2018 (has links)
Monitoring of cambial activity in sample trees during growing season 2013 and 2014 was the aim of this thesis. This study summarizes the findings about the variations in the cambial zone, the radial increment of stems, the differentiation process of xylem and phloem formation. The changes in cambial zone observed at the cellular level were made possible by the periodical sampling. Periodical samples - microcores were taken with the Trephor tool at weekly intervals from March to November. The permanent microscope slides were made of microcores. The number of the permanent microscope slides provided information about the actual cambial activity at the time of sampling. Variations and results of the cambial activity were evaluated in relation to the climatic conditions of the research site. The unfavorable climatic conditions were noted in the growth response of sample trees, especially in 2014. The radial xylem increment was 1012±489 µm in 2014. The maximum daily increment of xylem 13±4 µm was recorded between 29 May and 26 June 2014. The total tree ring width was 1655±444 µm in 2013. The maximum daily increment of xylem 27±13 µm was recorded between 13 June and 11 July 2013. The xylem formation lasted for 91 days in 2013. The xylem formation was 9 days shorter in 2014.
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Natural regeneration in relation to different gap sizesHiitola, Nina Maria January 2018 (has links)
The goal of this diploma thesis was to assess the spatial and temporal development of natural tree regeneration in forest openings, in the temperate forest types of South Moravia, Czech Republic. Relationships between micro-site conditions and seedling growth were analysed, with focus on gap size, light conditions and soil environment. Ten different semi-circular gaps, ranging from 0.02 hectares to 0.13 hectares in size, were included for carrying out sampling. The sampling followed a long-term research set up in 2013 by the Training Forest Enterprise Masaryk Forest Křtiny. The regeneration census focused on identifying prevalent species and recording their density and height class, in relation to their position in a canopy gap. Beech (Fagus sylvatica), Norway spruce (Picea abies) and silver fir (Abies alba) were the prevailing target species with varied mixed compositions, suggesting management favourability towards selection systems and irregular shelterwood system due to the high functioning level of shade tolerant tree dynamics.
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Lze využít samoprořeďování buku v pěstování lesů?Homola, Petr January 2019 (has links)
The thesis deals with the use of the process of self-spinning in growing beech stands. The classical method of growing beech stands is described in the available literature, which focuses on the process from restoration to educational interventions in rods. The literature review also mentions a selective method in beech farming. Furthermore, the process of self-dilution is outlined, where the operation of this process is described. The methodological part includes preparatory work, fieldwork and office work, each of which is sent as it was done, whether in the office or in the field. Field work includes, for example, measuring the height and thickness of trees, measuring the height of the crown deployment, determining the quality level of the tree. The office work includes the processing of acquired data from the field into a clear database. Furthermore, data from this database were analyzed for the results. In the final part there is an evaluation of the results, which will help us to tell whether and, if so, under what conditions can this method be used in forestry practice or not.
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Stanovení spolehlivých identifikačních znaků kvalitních a silně přirůstavých stromů jako základ probírkové metody cílových stromůVícha, Tomáš January 2017 (has links)
The aim of the thesis was determination of features, which indicate trees with above-average increment. The work was carried out in the forest district Borky, which is part of Training Forest Enterprise Masaryk Forest Křtiny. Trees of two main species, e.g. European beech and Norway spruce, were analyzed. In the field, total height, the height of the crown base, occurrence the forks and their heights were measured. Trees were assigned with social status, crown quality and release status. Using a logit model, it was found, that for beech, the only statistically significant parameter was social status. For spruce, diameter, crown length, distance between breast height and crown base, crown quality and the edaphic category were significant predictors of above-average increment. In the end, equations of probability have been compiled.
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Zpracování strategického scénáře vývoje zásob a těžeb buku na ŠLP "Masarykův les" Křtiny s výhledem na 30 letMašek, Michal January 2014 (has links)
This piece of work seeks to suggest an optimal strategy for beech felling to avoid high felling fluctuations in the future. This particular suggestion is based on the last two forest management plans. Divisions based on the age class in the last two decades were analysed (described?) and compared with each other. The calculations of felling plan were based on two different scenarios. Based on felling balance comparison, both scenarios could be used. The second scenario is preferred based on economic reasons.
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Mechanická analýza lepeného spoje dřevo - uhlíková vláknaHarok, Jiří January 2015 (has links)
This diploma thesis deals with a mechanical analysis of bonded joints between timber and carbon fibres. Bending, shear and compression tests were chosen to describe the bonded joint's behaviour. The experiments were filmed by cameras for further evaluation of relative deformation and relative shear deforation, a well as movement. The measured data were used for analysis of deformation and specimen behaviour, comparison of different wood types and specimen results, and numerical three-dimensional model compilation.
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Vliv zvýšené vzdušné koncentrace oxidu uhličitého na růst buku lesníhoSokolová, Tereza January 2015 (has links)
Elevated CO2 concentration influences the anatomical, physiological and morphological characteristics of plants, both directly and indirectly. The aim of this thesis was to determine the effect of increased atmospheric CO2 concentration on growth of European beech (Fagus sylvatica). The experiment was carried out from autumn 2005 on environmental work place Bílý Křiž in Beskydy and established in artificial conditions (A-ambient - natural air concentration of CO2 - 385 ppm, E-elevated - 700 ppm, C-control - open control area). Two-year old seedlings of beech and three years old spruces seedlings have been planted in a triangular spacing in lamellar biospheres in a total of 96 individuals. The study is focused on biomass production of beech in different types of mixed cultures together with Norway spruce (P-pure - monoculture, I-Individual -- individual mixing, G-group -- group mixing). In mid August 2013 has begun destruction of beeches, which was completed in September 2013. Aboveground parts were dividend in to group consisting of branches and trunk and roots were subjected to destructive analysis later. Separate parts of the trees were dried in the oven for 48 hours at 80 °C and subsequently 2 hours at 105 °C and then were weighed to determine the biomass. After eight years of experiment, cultivation of spruce and beech in lamellar biospheres, there were no signifiant differences in total biomass of trees between varieties A and E. However, it showed significant influence of CO2 on the biomass of individual organs (leaves, branches, trunks and roots, including stumps ) as well as trees grown in a single mixed culture (I). When comparing the total biomass in the spheres, sphere E showed average total biomass of an individual tree about 27 % higher, in mixed G variety 25 % lower and in the P mixing 147 % higher than mixed I in the sphere A. Biomass production of roots without identification of mixing factor increased by 60 % in the E variety. Most significant difference in belowground biomass was detected in variety of mixing I. In the E sphere was 200 % more belowground biomass compared to sphere A. These preliminary results show that total biomass of beech was higher in sphere E than in the sphere A. Differences in total biomass , however, can be caused by mixing and correspond to the concentration of CO2.
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Vyhodnocení růstu výsadeb buku lesního (Fagus sylvatica L.) v závislosti na použitém sadebním materiálu a stanovištně ekologických podmínkách. / Evaluation of growth of beech plantations (Fagus sylvatica L.) in dependence on used reproduction material and site-ecological conditions.Florián, Tomáš January 2015 (has links)
Abstract On the Forest district Strašice, which is located at the Division Hořovice, Military Forests and Farms was founded in 2012 eight plots on 4 wooded clearings. Boots were afforested beech (Fagus sylvatica L.). Forestation was on these plots used simpleroot planting stock a indoorroot planting stock. Another criterion was the intensity of sunlight seedlings (permanent sunshine / shading; during the day changing insolation). The aim of this thesis is to evaluate the growth of seedlings depending on the planting stock and intensity of solar radiation. Subsequently, the proposed recommendations, which would be appropriate to deal with in practice. Seedlings were permanently marked with a unique letter and number. From 2012 until 2014 at the end of the growing season measured growth variables - root collar diameter, height of seedlings, height increment, quality features and mortality. Top maturing seedlings on an area where it was used in afforestation simpleroot planting stock material and irradiation area during the day alternating shading. Not permanently sunlit and shaded. On the contrary, indoorroot planting stock material is higher on permanently sunlit area than in permanently shaded. This result is identical to the results of other well-oriented work. The results and conclusions of this thesis is planted beech recommendations on areas where direct exposure varies during the day with the shading (light - shadow). However, it is not always possible and feasible, in terms of the internal structure of vegetation planted beech at said place. It is therefore possible to plant bare planting material surfaces with extreme lighting conditions (areas permanently sunlit or shaded). But what concerns simpleroot planting stock material it is advisable to observe the fact that much better grows in areas with favorable conditions (areas with alternating irradiation and shading). It is also necessary to comply with environmental requirements beech. Always determine the most appropriate place on the bare surface (Clearfelling) for the planting of beech. Use only high quality planting material conforming to CSN 482115. Professional supervision forester at cut the grass work quality and functionality over the fence, and thus mitigate damage by animals. Therefore seek the highest possible representation of planted trees (to comply with the statutory requirements for supportability) due to the selection of the best individuals in the education and creating the future quality and healthy growth.
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