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Hodnocení stavu a vývoje sukcese po lesním požáru na kalamitní holině v revíru Janov, LS Jeseník – Lesy ČR, s. p.
Kmínková, Michaela
This bachelor's thesis concern with the investigation of the state and development of the secondary succession after the forest fire, which occurred in 2018 on a calamitous clearcut in the area of Janov, LS Jeseník - LČR, s. p. with a size of 6.75 ha. The assessment method was to evaluate the data from the field survey on 5 test plots, where I determined the type of tree species and forest regeneration, given dendrometric parameters - height and accrue, representation of the tree floor, I also evaluated the damage of regeneration and the development of unwanted vegetation. These values were measured in circular plots with a number in the range of 25 – 33. The plots were located both at the site of the fire and outside of it, with and without fencing. Aspen (Populus tremula L.) was the most numerous tree species in the area under investigation, with the largest presence in the area of the fire with fencing. With the greatest increase in height, the willow (Salix caprea L.) dominated here. The most frequently occurring damage was bite and frost damage occurring on the fireground outside the fence. Therefore, fencing proved to be an effective protection against game in this locality. The area outside the fence and the fireground was covered the most with unwanted plants.
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Stav obnovy javoru klenu (Acer pseudoplatanus L.) na Školním lesním podniku 'Masarykův les' Křtiny
Mikoš, Ondřej
his bachelor's thesis deals with the natural and artificial regeneration of sycamore maple at the Masaryk Forest Křtiny School Forest Enterprise. According to forest management records, natural and artificial regeneration was evaluated between 2013 and 2021. The extent of restoration was determined according to individual years, forests, the method of restoration, the target economic method and the set of forest types. The results showed an increase in the extent of sycamore maple in the artificial regeneration of the forest during the observed period, in 2017 17 areas were afforested and in 2020 40 areas. The largest extent of natural maple regeneration was reported in the Habrůvka forest during the period under review, namely 1.6 ha in 2014. Their structure was further investigated in three selected stands in the young stage with a significant proportion of sycamore maple. Trees in the stands were classified on three plots in each stand, the enumerated thickness was measured and the target trees for which the height was measured were selected. A sufficient number of promising (target) sycamore maple was found in all stands. The result also shows that the sycamore maple in the evaluated thicket is most often mixed with ash and european beech.
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Využití potenciálu přirozené a kombinované obnovy na Lesní správě Nasavrky (Lesy České republiky s.p.)
Zemanová, Anna
The diploma thesis dealt with the topic of the vegetation decline of the Norway spruce and its following regeneration in the Lichnice district, Nasavrky Forest Administration. From the results obtained from the forest economic records, it was found that the beginning of spruce decline was detected in 2018. The highest reported volume of random logging was reported in 2020 (46 405.92 m3). The largest reported clearing was also in 2020, at 53.69 hectares. The most common tree species in natural regeneration and artificial regeneration was Norway spruce, but its share is gradually decreasing year by year, to the benefit of a greater diversity of tree species on the range. Next, an experiment was conducted with the seedlings of the forest tree species that were collected and replanted as an underplanting in spruce stand 326A08. The mortality of the three study areas was evaluated here. The best results were achieved by white fir seedlings, where minimal mortality was found, on the other hand, the worst results were achieved by summer oak seedlings, where mortality was almost the majority.
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Stav a potenciál přirozené obnovy po kalamitě na revíru Polana, LS Jablunkov
Dyrčík, Vojtěch
The aim of the presented thesis was to evaluate the status and potential of natural regeneration in relation to the condition of surviving individuals of the parent stand after a bark beetle calamity. The locality of interest was the Polana forest district, located in the territory of the Jablunkov forest administration. Five representative stands were selected for the field survey, where after the death of the spruce stand component, there remained in the upper stage individuals of the parent stand, mostly beech (Fagus sylvatica L.). As the number of beech (Fagus sylvatica L.) individuals in the parent stand increased, so did the frequency of rejuvenation of this tree species. In places where there was less beech (Fagus sylvatica L.), spruce (Picea abies (L.) Karst) and white birch (Betula pendula Roth) became more prominent. The most abundant species in the parent stand were beech (Fagus sylvatica L.), sycamore (Acer pseudoplatanus L.) and larch (Larix decidua Mill). A relationship between the rejuvenation of beech (Fagus sylvatica L.) and the condition of the parent stand was also found in the area where the regeneration inventory was repeated. Here, the natural regeneration of Norway spruce (Picea abies (L.) Karst) was more pronounced,as well. In contrast to beech (Fagus sylvatica L.), its abundance in the regeneration decreased after two years.The areas of interest can be considered as restored to 94 % of the total area, of which 77 % was created by natural regeneration alone and 17 % by combined regeneration. In 6 % of the area, rejuvenation gaps need to be filled.
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Struktura porostů pionýrských dřevin a jejich obnova v přírodní lesní oblasti 29 - Nízký Jeseník
Haltof, René
The submitted diploma thesis deals with the structure of pioneer tree stands and their subsequent regeneration in the natural forest area 29 - Nízký Jeseník, created by successions after allochthonous spruce, specifically located at LS Vítkov and LS Opava (LČR, s. p.). The aim was to describe the structure of medium old forest stands with a predominance of birch in the area of interest, in selected forest stands, and to register all tree species. For the upperstory (trees over 2 meters), which is mainly formed by birch, measure the diameter of the tree at breast height. Then find out their growth potential and select target trees. For target trees, determine the diameter increment and also the length and width of the crown. For trees below 2 meters (understory), measure their height and differentiate them according to the origin – natural or artificial regeneration and also evaluate the growth potential of trees from natural and successful artificial regeneration. In accordance with the objectives of the thesis, the specifics of tending usable in forestry practice were formulated.
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Hodnocení stavu a vývoje přirozené obnovy na TVP “Smrk“ se zaměřením na habr obecný (Carpinus betulus L.) na polesí Vranov; ŠLP Masarykův les Křtiny
Betáková, Nikola
Hornbeam is a neglected and not very desirable tree species in our forests. Despite this, its representation in mixed and deciduous forests is increasing. This is mainly due to its excellent natural rejuvenation ability, its ability to adapt and grow in almost any habitat. This thesis deals with the assessment of the status and development of natural regeneration with a focus on hornbeam. The thesis also includes research conducted on permanent research plots ("Spruce", stand 69C9) established in the Vranov forest, Masaryk Forest Křtiny. Data measured using basic dendrometric parameters were compared. The beginning of the measurements is dated from 1958 to the present. In the results it was confirmed that hornbeam rejuvenates very well on these sites. Notwithstanding the presence of other tree species in the parent stand, the natural regeneration of hornbeam was considerably higher. It is a shade-tolerant tree species that does not show large increments in height or thickness. It holds its own in the lower echelons and thus helps to nurture target economic tree species.
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Přirozená obnova po odumřelém smrkovém porostu na Školním lesním podniku „Masarykův les“ Křtiny
Krásenský, Jiří
The aim of this thesis was to determine the state and potential of natural regeneration under dead spruce stands. The research was conducted at two locations in the vicinity of Brno within the University Forest Enterpise Masaryk Forest in Křtiny. A research plot was established at each location, consisting of three consecutive variants: stand, partial cut and clearcut. A network of circular sample plots was established in each variant to determine the state of natural regeneration. The investigation also included an analysis of seed fall in the stand and partial cut variants. It was found that the lowest mortality occurred under the dead spruce stand, compared to the other variants, and the largest number of seedlings were found there. The most common tree species that regenerated under the dry stand was spruce. The seed bank under the stand contained a more diverse range of seeds than under the partial cut.
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Okus dřevin a jeho vliv na dynamiku lesa na LS Dvůr Králové, revír Hony
Gereg, Michal
The subject of my bachelor thesis was monitoring of the condition of natural regeneration in forest district Dvůr Králové and evaluate the impact of roe deer Capreolus capreolus and red deer Cervus elaphus. The investigation was realized on 10 transects where it was ascertained % of damaged individuals and 1.5 m in height, with the total number of surveyed individuals 2 332 ks. The transects were recorded a total of six woody plants. Norway spruce Picea abies -- 1 179 ind., followed by Scots pine Pinus sylvestris, Sessile oak Quercus petraea, Birch Betula pendula, Rowan Sorbus aucuparia and European beech Fagus sylvatica were the most represented species. The summer browsing was only monitored. The most damaged species from the main tree monitored species was Quercus petraea -- 37 %, the least damaged tree species was Pinus sylvestris -- 9 %. Roe deer caused the most part of damage from game.
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Přirozená obnova buku v těsné blízkosti zlínské aglomerace
Vyoral, Martin
Thesis examines problems with natural regeneration, arising from the issue of the immediate response of forests to large agglomerations. Quantifies the damaged area recreation sites load and seeks reasonable consistency of production and recreational functions of forests. Damage to land in transects achieved average 38%. The aim of this work was to focus on the natural regeneration of beech forest in the district where there are built tourist-educational-recreational complex Lazy, which has a major impact on forest management in the locality. On the question of liability for bodily injury and property on built structures (trail, gazebos, jungle gym), the law firm entered report that refutes the information from information boards that entry into the forest is at your own risk. The issue of security was also prepared a questionnaire to the evaluation finds considerable ignorance of the respondents on the question of safety rules during the stay in the woods. Risks associated with the movement of forest mechanization poorly evaluated 58% of respondents.
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