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Extending the functionality of LaiPen
Trtílek, Jakub ; Šandera, Josef (referee) ; Hejátková, Edita (advisor)
The main goal of bachelor thesis was extending functionality of LaiPen LP 100 with voice recognition module, that would help to insert names of plants, while working with the device. Manual selection of vegetation is in the current version of the instrument barely used, cause of long time demands. Selecting, implementing and programming the voice recognition module EasyVR 2.0, was the topic of my work. Also the design of controlling menu and integration of the module to the LaiPen device. For the integration was necessary to design module, that would mediate communications between CPU and voice recognition module. The work includes also a design of I2C/UART convertor. For this design of the convertor was used microcontroller Max3109, that required to program main controlling functions.
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Relationship between leaf biochemistry, physiology and specie's competitiveness in selected grasses of relict tundra in Krkonoše Mts.
Mamula, Petr Martin ; Lhotáková, Zuzana (advisor) ; Tylová, Edita (referee)
The Krkonoše (Giant Mountains) Arcto-Alpine Tundra is an area that is part of the Krkonoše National Park with a unique ecosystem and biodiversity. In history, this area was very fundamentally influenced by the intervention of man, who farmed here and thus caused the creation of today's rare matgrass (Nardus stricta L.) meadow ecosystem. Thanks to the low growth and sparse foliage of the matgrass, many other plant species grow in these matgrass meadows, which are often endemic and protected by the law. In recent years, however, the matgrass has been overgrown by other grasses, such as the hairy reed grass (Calamagrostis villosa J.F. Gmelin), which, due to its taller growth and dense canopy covering the surface, does not allow the growth of rare species such as matgrass. Therefore, the aim of this work was for matgrass (N. stricta) and three other selected species of grasses - tufted hair grass (Deschampsia cespitosa (L.) P. Beauv.), moor grass (Molinia caerulea (L.) Moench) and hairy reed grass (C. villosa), to identify, based on biochemical, structural and physiological foliar parameters, a parameter or a combination of parameters that could give competing fennel grasses a competitive advantage. Field research and collection of foliage samples, for subsequent laboratory processing, took place in...
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Application of imaging spectroscopy in monitoring of vegetation stress caused by soil pollutants in the Sokolov lignite basin
Mišurec, Jan ; Kupková, Lucie (advisor) ; Pavelka, Karel (referee) ; Homolová, Lucie (referee)
Forests can be considered as one of the most important Earth's ecosystems not only because of oxygen production and carbon sequestration via photosynthesis, but also as a source of many natural resources (such as wood) and as a habitat of many specific plants and animals. Monitoring of forest health status is thus crucial activity for keeping all production and ecosystem functions of forests. The main aim of the thesis is development of an alternative approach for forest health status based on airborne hyperspectral data (HyMap) analysis supported by field sampling. The proposed approach tries to use similar vegetation parameters which are used in case of the current methods of forest health status assessment based on field inspections. It is believed that importance of such new methods will significantly increase in the time when the planned satellite hyperspectral missions (e.g. EnMap) will move into operational phase. The developed forest health monitoring approach is practically demonstrated on mature Norway spruce (Picea abies L. Karst) forests of the Sokolov lignite basin which were affected by long-term coal mining and heavy industry and therefore high variability of forest health status was assumed in this case. Two leaf level radiative transfer models were used for simulating spectral...
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Index listové plochy solitérů a liniových výsadeb dřevin
Binková, Tereza
Abstract Bachelor thesis Leaf area index of solitaires and line plantation deals with the findings of LAI in selected line plantations and solitaires with direct and indirect methods. For indirect method of leaf area index measurement two instruments were used these are: 1) LAI-2000 PCA (LiCor, USA) as a world use standard and 2) LaiPen LP_100 (PSI, ČR) as a new parallel instrument, which is similar to the one mentioned above, however, more easy to be used in practice. As direct method of comparison method of litter traps was used. The aim of the work was to evaluate if above mentioned instrument based on indirect method are usable to determining LAI of line plantation and solitaires in landscape. The results showed that used indirect methods are probably not suitable for LAI estimation of solitaires and line plantations mainly because of great influence of synoptic situation. In addition, the selected direct method also does not reach required accuracy, because of influence of wind, which affects the amount of litter in traps. Due to these serious reasons it is recommended to use different direct, semi-direct or indirect methods.
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Variabilita podkorunových srážek ve smrkovém porostu
Smrček, Jan
This paper deals with variability of throughfall in spruce stand (Picea abies (L.) Karst) at the age thirty-nine years. The research was performed at the experimental plot situated 620 m above the sea level and its surface was 625 m2. The throughfall precipitation variability was evaluated by twenty-five rain gauges placed in the stand and compared to rainfalls in the meteorological tower. Subsequently, the structure of the stand was measured using a hemiview photograph and a leaf area index, and the throughfall was evaluated against it. Data were processed in the EXCEL and STATISTICA programs. It has been found that the degree of openness and density of the stand directly affects the precipitaion falling under the stand. It has also been found that the highest precipitation is at the point of tree crowns with contact.
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Spatial snow distribution in locality with diverse forest structure in the Sumava Mountains
Švejdová, Klára ; Jeníček, Michal (advisor) ; Šípek, Václav (referee)
Snowpack is strongly influenced by several environmental factors. Besides meteorological and topographical conditions, vegetation structure plays an important role. The aim of this bachelor thesis was to assess how the canopy structure affects snow distribution. The snow depth and snow water equivalent (SWE) were measured in a selected location situated in the Kvildský potok basin in the Šumava Moutains during the winter season 2019. Canopy structure was described using Leaf Area Index (LAI) obtained from hemispherical images of the area. The degree-day method was used to calculate melt factors. The influence of vegetation was examined by using the correlation and regression analyses. Snow depth and SWE was significantly lower in forest sites than in the open area and in the forest disturbed by the bark beetle (Ips typographus). The influence of canopy structure was highest during snow accumulation and its importance decreased with time. The SWE variability was largest for last measurement during the melt phase. Melt factor calculated for period between last two field measurements was 2.3 mm∙řC-1 ∙d- 1 .
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Application of imaging spectroscopy in monitoring of vegetation stress caused by soil pollutants in the Sokolov lignite basin
Mišurec, Jan ; Kupková, Lucie (advisor) ; Pavelka, Karel (referee) ; Homolová, Lucie (referee)
Forests can be considered as one of the most important Earth's ecosystems not only because of oxygen production and carbon sequestration via photosynthesis, but also as a source of many natural resources (such as wood) and as a habitat of many specific plants and animals. Monitoring of forest health status is thus crucial activity for keeping all production and ecosystem functions of forests. The main aim of the thesis is development of an alternative approach for forest health status based on airborne hyperspectral data (HyMap) analysis supported by field sampling. The proposed approach tries to use similar vegetation parameters which are used in case of the current methods of forest health status assessment based on field inspections. It is believed that importance of such new methods will significantly increase in the time when the planned satellite hyperspectral missions (e.g. EnMap) will move into operational phase. The developed forest health monitoring approach is practically demonstrated on mature Norway spruce (Picea abies L. Karst) forests of the Sokolov lignite basin which were affected by long-term coal mining and heavy industry and therefore high variability of forest health status was assumed in this case. Two leaf level radiative transfer models were used for simulating spectral...
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Extending the functionality of LaiPen
Trtílek, Jakub ; Šandera, Josef (referee) ; Hejátková, Edita (advisor)
The main goal of bachelor thesis was extending functionality of LaiPen LP 100 with voice recognition module, that would help to insert names of plants, while working with the device. Manual selection of vegetation is in the current version of the instrument barely used, cause of long time demands. Selecting, implementing and programming the voice recognition module EasyVR 2.0, was the topic of my work. Also the design of controlling menu and integration of the module to the LaiPen device. For the integration was necessary to design module, that would mediate communications between CPU and voice recognition module. The work includes also a design of I2C/UART convertor. For this design of the convertor was used microcontroller Max3109, that required to program main controlling functions.
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Hodnocení defoliace vinic s ohledem na stanovení rozsahu redukce listové plochy
Tisarová, Mária
This thesis deals with the evaluation of defoliation of vineyards with respect to determination of extent of leaf area reduction in the varieties Hibernal, Zweigeltrebe and Cabernet Moravia. The experiment was conducted in 2013 at the experimental sites in the cadastral area of Lednice in Moravia and Rakvice. The development of leaf area was evaluated by ADC device BioScientific Ltd. during three periods (June, July, August) in the phenological stages of flowering phenological stages of fruit development and ripening of the fruit phenological stages. From the measured data was determined leaf area index (LAI) and the extent of defoliation. Using analytical methods parameters of quality grapes were evaluated - the sugar content, pH, acidity, assimilable nitrogen, and others in order to determine the optimal time of reduction in leaf area of a vine. Part of this work was also the evaluation of operating costs for Defoliator.
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Výpočet radiace v lesních porostech na základě dat leteckého laserového skenování
Patočka, Zdeněk
Leaf area index (LAI) is the most important variable influencing the penetration of solar radiation beams through the forest stand. Currently, the airborne laser scanning, as new indirect method, suggests itself for estimation of LAI. LAI was measured terrestrially using the hemispherical photographies analysis and compared with LiDAR Penetration Index - LPI. There were created several regression models describing the dependence of LAI and LPI with coefficients of determination from 0.71 up to 0.81. Leaf area index was also applied to the Beer-Lambert law for calculation of the solar radiation in forest stands. Practical application possibilities of LPI in forestry (estimation of stocking, optimization of shelterwood cuttings etc.) have been described in conclusion of this diploma thesis.
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