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Návrh managementu porostů v převodu na výběrný les na ŠLP Křtiny s využitím růstového simulátoru
Straka, Prokop
On the selected area in the localities of Pokojná hora and Klepačov on the school forest company Křtiny, which are in a stage of conversion to a selection forest there was collected dendrometric data by using the measuring kit Field-Map. This data was consequently processed in the growth simulator SIBYLA, and the scenarios of the growth of the individual sample areas were created. The results of the simulations were then compared in the application STATISTICA 12. As the most suitable concept was selected the one that was closest to the ideal selection forest. It was ascertained that for the stand 109 Cav the best scenario is the Mayer frequency curve type D. For the stand 114 Cav the most suitable concept was found to be the target thickness method.
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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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Produkční a přírůstová charakteristika porostů ŠLP ML Křtiny na základě statistické provozní inventarizace
Kuličková, Barbora
The thesis examines the amount of growth and production characteristics of the set of stands, in which the transformation to the selective management method was started about fifty years ago. These are the parts of Klepacov and Pokojná hora, which are part of Habrůvka and the forest management complex ŠLP ML Křtiny. Repeated statistical inventory analysis using Field-map technology identified the necessary dendrometric variables. Some of them served to calculate the total current increment. Using the MS Excel program and the solver function, the coefficients of elevation functions for individual trees in the given sections were calculated. As a result of this step, the missing height, stock, enumeration of the basal area, the number of trees per hectare, etc. were calculated according to the model. On the basis of these data, individual production and growth characteristics were determined and then compared. These quantities were compared mainly at the level of inventory areas. Typology has also been omitted. Finally, the appropriate size of the optimal basal area was determined, taking into account the maximum value of the volume increment. In this case, a more detailed level in the form of individual trees was used outside the level of the inventory area, for the more precise determination of the values of the enumerating basal area. The basal area was evaluated in five variants according to the forest type (spruce, mixed, beech) and forest types (3S – fresh oak beech and 4S - fresh beech). From the individual tree level, the set value of the basal area was then recalculated to the target tree thickness in centimeters for possible practical use in selecting trees.
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Evaluation of dendometrical characteristics of Norway spruce on on limestone soils
Krištof, Tomáš ; Surový, Peter (advisor) ; Šálek, Lubomír (referee)
A parent material is one of many factors which influences a condition of stand and its dimensions. In this final thesis 8 sample plots were placed inside two equivalent Norway spruce stands from which one was situated on limestone parental material and the other on pyroclastic rocks.
Most of the mensuration characteristics as well as inventory based information were measured with Field-Map technology. From the collected and analysed data we can
observe clear dominance of the limestone situated stand, however the second stand seems in better condition according to the slightly lower defoliation. With this limited sample and variety of other abiotic and biotic impacts it is difficult to determine direct correlation
between spruce stand and parental material. However, this issue could be resolved with higher number of measured spruce stands, which can be covered by future research into
this matter.
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Analýza a optimalizace inventarizačních metod v podmínkách tropického deštného lesa v peruánské Amazonii
Němec, Petr
The submitted work compares results of two forest inventories conducted on the plot of 200 ha within the forestry concession in the tropical rainforest in the Peruvian Amazon. First inventory conducted in 2007 used for field data collection the common method with tapes and mechanical compasses. The second inventory conducted in 2008 used a set of electronic devices, consisting of a field computer, laser rangefinder, electronic compass, a GPS unit and a specialized software Field-Map. In both inventories the positions of all trees with a dbh bigger or equal 400 mm were mapped and following attributes were recorded: position, species, total height, trunk height and dbh. Significant differences were discovered between both methods and the inadequacies were described. The results from the comparison study show that the method conducted using electronic devices is faster and more exact in measurement of tree attributes and in navigation on the plot. However, nor use of this method encompassed to map all the trees and that is why the distance sampling method for population density estimation was used for completion of inventory results. The population map of big trees was created and used for inventory simulations using circular and belt plots of different size and different density with the aim to find most suitable variants. Results of simulated inventories were evaluated regarding their accuracy and time expenses and the variants suitable for use in the zone were suggested.
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