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Wood seasoning of poplar Populus maximowiczii x P. nigra ´Max 1-5´ using evapo-transpiration
Švejkar, Tomáš ; Štícha, Václav (advisor) ; Jankovský, Martin (referee)
This thesis deals with the possibility of using evapotranspiration for efficient drying of wood. An important prerequisite is that the trees with good coppice pleated capability even after they are felled and physiologically active until they have enough water in the wood. The physiological activity sheets then accelerates the drying of wood. In search of work deals with familiarization with the problems of drying biomass possibilities of its use, and other definitions associated with this work. The main output of this work is to evaluate the decrease in water content in the wood poplar Populus maximowiczii x Populus nigra 'Max 1-5', chopped down just before the start of the growing season, due to evapotranspiration. In discussing data are compared with other available literature and summarized at the end of everything.
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Agroklimatické hodnocení lokality z pohledu pěstování vinné révy
Macholánová, Lenka
ABSTRACT Agroclimatic site evaluation from the perspective of growing vineyards Grape vine cultivation is significantly limited by climatic conditions. The Czech Republic is located at the very northern edge of the effective vine cultivation. Therefore growers are significantly interested in climatic conditions specification. Software "AgriClim" calculates on the basis of basic meteorological data the selected meteorological and agro-meteorological characteristics related to the cultivation of the vine. Data processing and evaluation was performed for the long-term time series from 1961 to 2009. The aim of research was to assess the absolute values (eg. minimum temperature), computed values (eg. Huglinův index, evapotranspiration) and trends in fifty-year series and answer the question whether the climate is changing and whether changes are in favour of cultivated plants or not. There were three weather stations selected in the vicinity of grapes regions (Lednice, Brno-Turany and Stare Mesto) and two stations located at higher altitudes (Brumov-Bylnice and Boskovice), where the grape vine has so far not been cultivated. There were observed significant increase of temperature in all locations and no changes in precipitation. This situation is negatively reflected in the state of the water balance of the lowest locations that are becoming drier and more risky for grape vine producers. On the other hand grape vine potential is growing at higher altitude locations, which provides nowadays better watering conditions.
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Methods for determining evapotranspiration and its values ??in the Czech Republic
HOUDEK, Tomáš
This paper deals with methods for determining evapotranspiration and its values achieved in the Czech Republic. For a better understanding of these issues is explained in the introduction to the concept of evapotranspiration. The first part of this paper discusses evaporation, its types and division. In this thesis are also presented factors affecting evapotranspiration. The largest part of this search addresses the methods used for determining evapotranspiration. Here we find treated in more detail the direct and indirect methods of estimation. The last part of this paper presents and compares the potential evapotranspiration totals achieved in the Czech Republic on the basis of different numerical methods.
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Non-metabolic use of solar energy in plants
REJŠKOVÁ, Alžběta
Non-metabolic use of solar energy in plants can be seen as plant thermoregulation driven directly by solar irradiance. Adaptations leading to warming up are particularly important in cold habitats. Cooling processes are needed everywhere where there is short-term or long-term excess of solar energy. Plants are of utmost importance for ecosystem and landscape functioning. Vegetation has a potential to regulate the Earth{\crq}s surface temperature and improve conditions for other living organisms. By regulating energy and water fluxes between land surface and the atmosphere vegetation is closely related to the climate system.
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