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Faktory ovlivňující obnovu lesa na požářišti u Bzence (LS Strážnice)
Jarošová, Veronika
The aim of this bachelor thesis was to determine the current status of the population of beetle maďalového in the area of fire residues in the forest governance of Bzenec Strážnice and its surroundings. A fire broke out at the end of May 2012 and damaged the area of almost 165 ha of forest. First instar grubs, which were present in soil of burnt vegetation at the time, were not hit by the fire, and then these grubs caused enormous loss of spring planting in 2013. The soil of fire residues was tested with various methods of soil preparation, which would lead to reduction of the amount of beetle grubs maďalového. Out of these methods, the method of soil preparation with milling cutter with depth effect was the most effective one. Application of FORCE 1,5g insecticide had positive effect on the survival of planted seedlings. The dispersion of grubs, in the stand depending on the distance from the tree trunk and the amount of grubs depending on the age of original vegetation, had been investigated. The results showed that the grubs do not have a single concentration but are scattered along the stand depending on the root system, and they were mostly present in the stands of the second class.
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Vliv způsobu výsadby a stanoviště na odrůstání kultur borovice lesní a dubu zimního
Jan, David
Thesis analyses the effect of plantation biotechnique and site on the growth of Scots pine and pedunculate oak plantations. Containerized planting sock of both woody species was planted on two research plots (group of forest type 2G a 2K) by the hole planting and with these planting equipment: planting bar, planting tongs, filled container dibble bar and hollow container seedling dibble. All variants of planting were realized with and without 2cm soil covering of root balls. Measuring and evaluation were realized 2 and 3 years after planting. It was found out that planting with the filled container dibble bar without covering of root balls is the best planting technique for Scots pine and planting with the hollow container seedling dibble without covering of root balls for pedunculate oak at 2G site. Planting with the filled container dibble bar with covering of root balls is the best technique for Scots pine and planting with the planting bar with covering of root balls for pedunculate oak at 2K site.
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Kontrukce lokálních objemových tabulek pro borovici lesní na LS Třeboň
Dvořák, Daniel
The purpose of this thesis is to create volume tables for Scots pine (Pinus sylvestris L.) in Forest Service Třeboň which is an organizational unit of Lesy České republiky, s.p. (state enterprise). Data for this paper were gathered from more than 250 trees that were measured in the field. DendroScanner program that can be used to form volume tables based on tree photographs combined with data measured in the field was used for this analysis (non-destructive method). According to the Czech forest ecosystem classification system, data were measured in six sets of forest types (SLT) and laser range-finder was used alongside other mechanic tools on the majority of Forest Service area. The accuracy of the data was verified by comparing it to a control set of lying trees (destructive method). The results of this paper are volume tables merged together for five SLT (supplemented by three additional tables) and independent tables designed for a 0M type. These tables are specified by a significantly higher stock of timber in comparison to traditional ones made by ÚLT.
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Vliv stanoviště na odrůstání kultur založených prostokořenným a krytokořenným sadebním materiálem
Brach, Vlastimil
The purpose of this diploma thesis was to compare and evaluate the growth of potted and bare-root seedlings planted in locations SLT 5K, 2K, 2S and 1K, where trial areas were established. In 2014 200 potted and 200 bare-root seedlings of European spruce, European beech and Douglas fir were planted in these areas and only Scots pine was planted and evaluated in location SLT 1K. 10 parameters and 5 traits were measured and evaluated in all the areas and on all the planted plants at the end of the growing period of 2017. A statistical evaluation was subsequently performed according to individual location and seedling version. The results clearly indicate that the highest mortality was in areas located at SLT 1K and we can say that potted Scots pine grew best in this area. Potted European beech grew best in location 5K. Potted European spruce grew best in location 2K. The potted versions of the planted seedlings were not found to have grown better at location 2S according to the overall evaluation and no difference was found in the European beech or the Douglas fir in growth between the measured alternatives.
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Srovnání vývoje smíšeného porostu s různým pěstebním managementem pomocí růstového simulátoru
Dobrá, Alena
The aim of this diploma thesis was to compare the development of mixed forest stands with different silvicultural management. For comparison, the SIBYLA forest biodynamic growth simulator was used. Four variants of silvicultural management were established: none (sanitacion) thinning, thinning, 100 target trees method, and 50 target trees method. All of them were applied to two research plots. Based on a comparison of the results of all variants, the most appropriate option for the given plot was selected. For the stand 19F5 growth on the first research plot, thinning was selected as the best variant. For the stand 322D4 on the second research plot, 100 target trees was selected as the most appropriate method.
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Stanovení spolehlivých identifikačních znaků kvalitních a silně přirústavých stromů jako základ probírkové metody cílových stromů
Bros, Peter
The aim of this diploma work was to find out and to determine appropriate identificators, which can make it possible to recognize trees with a strong increment. This diploma work sets identification marks for the European larch (Larix decidua) and Scots pine (Pinus sylvestris). Activites associated with determination of appropriate identificators of high quality trees with strong increment were investigated in the forest district Borky at the Training Forest Enterprise „Masarykův les“ Křtiny. We evaluated diameter at breast heigjt, total height , crown base height occurance of the forks, social status, release status and crown quality for every tree. We utilized the logit model, to find out significant identificators. We determined two main statistically significant identificators for the Scots pine – height and diameter at breast height. For the European Larch only the diameter at breast height was statistically significant. Other parameters showed statistical insignificance.
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Stanoviště reliktních borů v jihozápadní části Českého masivu
Velek, Martin
This bachelor thesis deals with selected natural habitats with the occurrence of forest pine (Pinus sylvestris). Selected locations are located in the southwestern part of the Bohemian Massif in conditions of higher hillsides and highlands. The rock trenches of the localities are formed in the lower parts of the slate and the scallops of the upper proteozoic, in the central parts there are the bumblebee knots which form the character of the territory. On these azonal sites, complex soil samples of O- and A-horizons were collected. Samples are compared to selected soil properties. The laboratory results were confronted with the findings from field surveys at selected localities
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Využití ohnutých dílců z borovice v konstrukci "hladké" jídelní židle
Juračka, Jaroslav
The aim of this diploma thesis is to consider the maximum use of bent parts in the design of a smooth dining chair with respect to the physical and mechanical properties of Pine wood. It also compares the strength properties of the three variants of the structural bonding of the reinforcing arc with the bearings and the smooth dining chair legs. Identify the strength properties of selected structural joints in the design of a smooth dining chair and statistically evaluate the results. The bending moment and the stiffness of the joint were determined for joints. They also describe the physical and mechanical properties of Pine Forest and the production of bent parts.
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Vliv částečného poškození kůry na anatomickou stavbu nově vytvořeného dřeva u juvenilních jedinců borovice lesní
Pýcha, Tomáš
The aim of this thesis was to determine whether bark damage on one side of a stem causes changes in wood anatomy. During the growth season a strip of bark was removed on half the circumference of stem of eight trees. After the end of growth season thin cross sections of stems were made from above and below the removed strip of bark. On these sections number of tracheids, their dimensions and radial wood increment were measured. Number of tracheids and radial wood increment on damaged side of the stem was 30-50 % lower below than above the wound. Radial width of tracheids on the damaged side of the stem was 14-16 % lower than on the undamaged side. Tracheid cell wall thickness was also lower on the damaged side of the stem where it was 7-20 % thinner compared to the undamaged side.
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Development and interpretation of site tree-ring chronology of Pinus sylvestris
Mašek, Jiří ; Treml, Václav (advisor) ; Šefrna, Luděk (referee)
The presented bachelor thesis deals with the study of climatic factors that influence the growth of the pine (Pinus sylvestris) in the locality near Rabštejn nad Střelou. The primary objective was to determine the limiting factors of tree growth and to perform dendroclimatic reconstruction. For this purpose, samples were taken at the site and local chronologies were created using various standardization methods. Using the correlation coefficients, limiting growth factors were determined, and reconstruction by regression and scaling was performed based on the highest correlation. The results showed a strong relationship of rings width to rainfall and humidity conditions, especially in the summer months and in various seasons from April to August. Most of the chronologies also showed the positive influence of February temperatures. Observed signature rings in many cases are well responsive to various climatic anomalies. For the most correlated variable, dendroclimatic reconstruction was calculated for the period 1850 - 2016 when the chronology was reliable. The reconstructed average rainfall corresponds well with the Klementinum climate line and other rainfall reconstructions.
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