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Zhodnocení výskytu a kvality výstavkových stromů na území demonstračního objektu porostů v převodu na střední les na ŠLP ML Křtiny
Vaníček, Lukáš
The main objective of this thesis is to evaluate occurrence and quality of Standard trees on the territory of 59 ha of Demonstration object of forest stands in transition to coppice-with-standards forestry; and to propose forest restoration using Standard trees. During field research, following parameters for Standard trees were collected: coordinates, DBH, crown height placement, tree height, quality. During data processing, following parameters were added: forest compartment identification, set of forest types, exposure, Standard tree trunk volume. Standard trees were most often found in 2S and 2C types. Quality of Standard trees was most often labelled as C or D. Largest volume was found for set of forest types 2D and 2H, smallest volume in set of forest types 1J and 1Z. In order to propose forest restoration, 8 x 0,5 ha square sample plots were established in forest types 2C an 2S. On these particular plots, DBH cross-calipering and harvesting intervention was carried out.
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Differences in photosynthesis and plant water status between coppice and high forest
Matoušková, Marie
This diploma thesis focuses on comparison of photosynthesis and tree water status between high forest and coppice of Quercus petraea (Matt.) Liebl. Four different types of management were investigated during vegetation season 2016: high forest, coppice on clear-felled site, coppice with standards and seedlings. Methods of leaf gas exchange and water potential measurements allowed to study transpiration, photosynthesis and its response to light and CO2 concentration and leaf water potential. All these physiological parameters were studied as linked to weather conditions and various levels of drought stress. When the soil water was not limiting factor trees in all variants of experiment behaved similarly. However, during mild to severe drought stress the coppice was superior to seedlings and to high forest. It showed higher photosynthesis rate (2.49 umol m-2 s-1) than seedlings (0.86 umol m-2 s-1), both under moderate water stress. Coppice also had higher stomatal conductance and quantum yield of fluorescence than high forest which allowed to higher photosynthetic rates. The lowest value of predawn water potential was in high forest (-3.27 MPa) whereas highest in coppice (-2.01 MPa) which indicated better water availability and lower evapotranspiration demands imposed on coppice sprouts due to their lower height and therefore lower overall aerodynamic conductance. Response of net photosynthesis to CO2 concentration revealed higher carboxylation rates in high forest than in coppice but low stomatal conductance was a reason for overall lower photosynthetic rates in high forest than in coppice. Due to its superiority under water stress coppice forest may be a viable option for forest management on dry sites during the climate change.
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Reakce tloušťkového přírůstu dubového výstavku na uvolnění koruny na experimentálních plochách určených k převodu na střední les na ŠLP ML Křtiny
Bambuškar, Petr
The thesis is focused on the study of the diameter growth of the oak potential standards (Quercus Sp.) at the research areas, which are included for transformation to the coppice-with-standards. These areas were effectively set up at Hády and near Soběšice, which are under the competence of the Training Forest Enterprise Masaryk Forest Křtiny. The investigated areas were divided into 16 squares of 50x50 m. There were different intesities at 50x50 m subareas. Every intensity has 4 replications. For control was established control area near by Soběšice plot. We also could compare impact of different thinning intensities for diameter growth and health status for each standard, because health status is important too for evaluation of this diploma thesis.
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Vliv vnějších a vnitřních faktorů na tloušťkový přírůst výstavkových dubů ve středním lese
Kollanda, Viktor
The aim of the thesis is to assess the extent of individual factors’ influence on the thickness growth of retention oak trees in the middle forest. The factors include height in 2008, habitat, release rate, vegetation age, the rate of epicormic branching and treetop health state and quality. To analyze the data, MS Excel and Statistica were used. The results were interpreted with the use of multidimensional regression analysis. The analyses resulted in regression coefficients which represent the relative magnitude of the increase of the thickness gain by the action of the individual factors. Not all the factors were shown to be statistically significant; their significance also differs over time.
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Zhodnocení přirozené obnovy v lese v převodu na střední les na majetku městských lesů Moravský Krumlov
Kikal, Jan
This thesis deals with the natural regeneration of sessile oak (Quercus petraea (Matt.) Liebl) in forest in conversion to the coppice with standards. The measurement was carried out on the property of urban forest Moravský Krumlov. There were 15 sample plots. Data were collected after the growing season 2014 in February 2015. Total number of individuals of natural regeneration, height, increment and damage of oak seedlings were measured. The aim was to assess the condition of natural regeneration due to forest type complex, harvest intensity and fencing. The results show that the best option for natural regeneration is forest type complex 2H where the growth and the condition of the seedlings are the best.
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Tloušťkový přírůst výstavkových dubů ve středním lese
Kollanda, Viktor
The aim of this thesis was to evaluate the diameter increment of sessile oak standards in a coppice-with-standards as related to release degree, site quality and age of the stands. We also tried to asses differences in diameter increment possibly induced by the above mentioned factors. Data processing and all analyses were done in MS Excel software. As a result, grafhical and tabellar presentation of differences between diameter incerements of partucular variants including the response of trees to release degree and combinations of other factor are shown. Statistical tests have shown that the diameter incerement of standards was related to investigated factors. Trees increased theit diameters on plots where release was done, but there were no significant differences between different release variants. Also, effect of age was also significant. On the other hand, there were no significant differences between increments on different edaphic cathegories.
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Hodnocení pařezové výmladnosti v městských lesích Moravský Krumlov
Kuličková, Barbora
This thesis deals with the rating of sprouting capacity on the research areas specified for the transformation to middle forest in the urban forest Moravský Krumlov. The areas were founded in 2008. It is mostly a description of layer development of coppice forest during several years of measurements and a comparison related to age, set of forest types and intervention intensity. An important attribute is a sprouts growth especially during a few years of measurement. The extensive damages were caused by relatively high pressure of the game. It has been found out the sprouts growth of oak /Quercus petraea/ has hundred per cent success of sprouting capacity on the set of forest types 2S /fresh beech forest/. However, the sprouts have vegetated also on other stands / the set of forest types/ , but due to the co- influence above mentioned factors the success was lower. Futhermore, the sprouts growth according to various variants /fenced, development phase, age, set of forest types, intervention intensity and number of seedlings per hectare/ was rated. In the first part, it was being found out if statistically significant differences existed among the individual levels /by sprouts growth, height icrement of sprouts/. In the other part, the levels of variants that led to the higher sprouts growth, were searching. And the result has been reached none of elected levels led to the making of maximum sprouts growth. However, the stated results can serve as a source for growing and forest regeneration of lower coppice storeys in process of stand conversion to coppice-with standards.
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Initial vegetative regeneration of broad-leaved woody plants on the experimental site of reserved coppice-with-standards woodland in the NR Na Voskopě, Czech Karst
Dekan, Petr ; Černý, Tomáš (advisor) ; Čada, Vojtěch (referee)
This thesis deals with the intensity of tree regeneration in the initial phase of development of future coppice stand. The research was conducted in PR Na Voskopě in the Czech Karst on an experimental strip measuring 25x125 m. This strip was felled in the early spring of 2015 (JELENECKÁ, 2015), there were 14 standards left for the future development of coppice-with-standards forest. The most abundant tree species are hornbeam (Carpinus betulus) and oak (Quercus sp.), there is also the maple (Acer campestre) and service tree (Sorbus torminalis), other trees have only a minimal representation. The average measured age of the felled oak equals 87 years and that of hornbeam equals 74 years, after model calculation for the hornbeam the average age was assessed as 68 years. On the felled strip there were 538 stumps recorded at the end of the growing season (3. - 4. 10. 2015), eight parameters of stump and root re-sprouting (height of the highest sprouts, total number of sprouts, the average height of sprouts, the largest horizontal width of the whole sprouting bunch, browsing rate of sprouts, presence of root sprouts and the sprout cluster presence). The analysis used data taken from Field-Map inventory (JELENECKÁ, 2015). Evaluation of the data showed that DBH has a significant effect on the regeneration of sprouts mainly for the hornbeam, but no effect for the oak. Topographic gradient along the strip also has some effect on the regeneration of sprouts, oak more intensively regenerates at the bottom of the slope and hornbeam in the upper part of the slope. Amid the slope there was some reduction in regeneration, most probably due to the game influence (mouflons). Browsing sprouts is on this experimental strip enormous. Despite adverse weather conditions (drought and heat) in 2015 regenerates in this relatively extreme habitat 91 % stumps.
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Mensurational and ecological characteristics of oak reserved trees on selected area of 2nd vegetation belt
Šturmová, Iveta ; Šálek, Lubomír (advisor) ; Surový, Peter (referee)
The goal of this thesis is to find out mensurational and ecological characteristics
of oak reserved trees on selected locality in 2nd vegetation belt. The locality is situated
on upland region close to the town Kroměříž. A part of the thesis is measuring of crown parameters, their projection and development of the crown during competition process.
100 reserved trees were measured for this research, The average crown projection has value of 199,65 m2 which implies that maximal number of reserved trees per 1 hectare is 50. Furthermore, number of dead big branches and number of small and big hollows were recognized. The average number of big dead branches is 5,95. The small hollows occurred only in 8 trees and big hollows in 12 trees. Number of dead tres and hollows are influenced by competitive adjacent trees.
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Produkce pravé a nepravé kmenoviny
Paško, Martin
Thesis seeks to determine whether there is a statistically significant difference in the volume production of regular and irregular stemwood depending on age and stand. With growth and incremental function to determine peak volume increment depending on age levels and diameter classes. The thesis was carried out in the field Hady (forest district Bílovice nad Svitavou). The stand groups were measured representatively selected trees, which have been determined thickness and height. Then were detected statistically significant differences and prepare the growth and increment functions. With these results a method of forest regeneration of these forest stands was determined. It was found that with few exceptions was no significant difference in volume production between regular and irregular stemwood. With acquired culmination incremental function was designed way to forest regeneration, to transfer to coppice with standards forest.
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