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Stav obnovy lesa po vichřici Emma na lesní správě Lanškroun - revír Letohrad
Černohousová, Jana
The main objective of submitted thesis was the assessment of the state and a development of forest regeneration of selected areas devastated by the wind caused by the wind disturbance Emma in 2008 in the hunting ground of Letohrad (Forest management Lanškroun). The state of recovery has been analyzed based on registration documents and a field survey. Furthermore, the analysis in the area of interest has been performed focusing on the growth of Norway spruce and a common fir in different microclimate conditions. Next it was monitored which species grows out the most in extreme conditions of clearing area. Another part of the piece dealt with the costs of sites regeneration. Based on the results, the aim of the thesis was to optimize the process of regeneration of disturbed sites in the area of interest. At selected sites of Letohrad area were identified the biggest issues connected to Norway spruce and a common fir planting. Among the main limiting factors were recognized unsuitable choice of site, extreme climatic conditions, weed infestation and a high amount of game. Spruce and fir had the most significant increment in the sites of small area element character. Planting of spruce in the third altitudinal forest zone did not increment well and was visibly lagging. On the contrary, an oak followed by a beech thrived under the same conditions. The highest costs were identified at problematic, still not established disturbed area of 309G11.
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Analýza spontánní sukcese na kalamitní holině vzniklé na územním pracovišti Stožec (Národní park Šumava)
Štětina, Pavel
Bachelor thesis deals with spontaneous succession on the calamity clear-cut area in the National Park Šumava. Two transects were created, which were divided into 10 m plots. One transect was 50 m in spruce stand, one continue through the 50 m long clear-cut area, and was terminated 50 m in dry stand. The second transect was the same, but the length of the clear-cut area was 110 m. On the plots were found out to be naturally regeneration and mature trees. According to the results, the positioning of the individual trees varies depending on their light requirements. The most natural regeneration was found in dry vegetation, except for light-emitting trees, whose center of gravity lies on the clear-cut area.
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Srovnání variant obnovy lesa po kalamitě: přípravný porost, umělá obnova, sukcese
Reška, Martin
The thesis assesses three different ways of restocking a clearcut originating from a windblown in 2010 in forest district Habrůvka, ŠLP Křtiny. Each type of restocking, i.e. sowing, planting, and natural regeneration – was established in two sets, one large and the other small size. The measurement of the sites that have been carried out annually, evaluation was done comparing the restocking methods, with a focus on mortality and growth. Additionally, a cost of each restocking method was considered, and the economic profitability was estimated for each type of restocking. The results show that costs on restocking by planting are much higher than of the other types of restocking, but in a long run planting is more profitable.
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Ověření přesnosti systému Haglöf xScape na měření plochy
Hlavica, Radoslav
This bachelor thesis has got to determine the accuracy of Haglöf Xscape measuring area compared with other more accurate methods, especially compared to the system Field-Map. As a background material for this work we used our own field measure-ments and manuals for both measuring systems. Within the field work, individual pat-terns were polygon, which were subsequently measured by the Haglöf xScape system and by the Field-Map system, which verified the accuracy of the Haglöf xScape sys-tem. Within the framework of work at the workplace it was proved that field work dates to the Field-Map system in the ArcMap software for comparison of measurement results in MS Excel. The accuracy of Haglöf xScape has been assessed as insufficient, so I recommend using other measurement systems.
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Projekt rekonstrukce kalamitních holin na území Arcibiskupských lesů a statků Olomouc
Bednář, Pavel
The topic of the bachelor thesis is concerning reforestation of calamitous cleared forest areas and withering spruce stands (Picea abies, L. Karsten) in the property of Olomouc archbishopric’s forests and estate (Arcibiskupské lesy a statky Olomouc) located in Hostýn Highlands in cadastral territory of Rajnochovice municipality. The first part deals with the causes of spruce wilting at the present and analysis of these causes in the researched location. The practical part concerns complex reforestation project including choice of tree species composition, proposed reforestation method and followed by recommended landscape aftercare until its forest stand provisioning. Further, the bachelor thesis includes overall economic calculation of proposed project concerning reforestation and forest stand provisioning.
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Vliv pěstebních opatření na strukturu mladého březového porostu
Konečný, Jan
In this thesis was observed an influence of silvicultural treatment on the structure of young birch stand. On location Stará Ves nad Ondřejnicí was chosen a 10 years old birch stand and on location Hlubočec a 15 years old one. The stands originated spontaneously from natural regeneration on clearing. On both locations were researched two stands in 2015, 2016 and 2017. Within the stands, control variants and the thinning ones were established in 2015. In the case of variants focused on a thinning was executed a repeated intervention in 2016 and in the same time a pruning of a part of individuals in the spring of 2017. On all variants all the woody plants were recorded with a height above 2 metres, which were measured a diameter at breast height (cm) during the years 2015–2017. On intervention variants at marked trees (samplers) were measured a total tree height (cm), an occurrence of a dry treetop (cm) and an occurrence of a live treetop (cm) as well. At the beginning and at the end of 2017 was also measured a treetop projection (cm) at all individuals on the area. Non-interventional stands reported a high number of individuals with a low diameter at breast height in both cases, which represented a significantly low resistence of these stands. This led to a reduction in stability, especially against the snow. Despite a major reduction in the number of individuals in the intervention stands, the proportion of trees was still higher compared to the mentioned literature. In response to this intervention was recorded an increased growth or base. The differences here did not manifest themselves as statistically significant during the first year after the intervention. Based on the results, which showed especially significant differences in the density of the cultivated stand with the non-interventional one can be recommended a very powerful intervention towards the release of the stand and the increase of stability.
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Projekt obnovy kalamitních holin a chřadnoucích porostů smrku ztepilého
Vlk, Jiří
The bachelor thesis deals with the reconstruction of calamity clear-cuts and of weakened Picea abies (L., Karsten, 1881) stands at the chosen locality of VLS Lipník nad Bečvou - the forest district called Anglické parky situated in the southeast of the Libavá. The first part of the thesis describes the chosen locality, including the analyses of the current state of stands. The next part of the thesis outlines and analyses potential causes and stressing factors leading to the current state of the locality under reconstruction. The experimental part of the thesis lies in the complete design of the clear-cuts reconstruction consisting of the preparation of the stand, wood species design, afforestation procedure and subsequent tending measures. The experimental part further suggests steps in the individual forest stand groups in order to increase the stability of the forest district Anglické parky. Last but not least, the thesis deals with the economic side of the project focused on the direct economic costs. To provide comparison, the costs are in the case of two chosen clear-cuts elaborated in two options - the option with fencing of chosen clear-cuts and the option without fencing.
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