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Mechanické vlastnosti bobulí vybraných odrůd révy vinné jako faktor ovlivňující jejich jakost
Hvězdová, Kristýna
In the dissertation there have been done the determining of the mechanical properties of selected species in grapevine with respect to quality of grapes during ripening during four weeks. Determination was done by the TIRATEST 27 025 machine. Fixity skin of grapes was measurement on compress and penetration testing. Next determination was measurement of testing rip off stalk from grapes, weight, height and width of grape, also were measured sugar contents and titratable acids. For assessment were chosen this selected species: Rulandské šedé, Rulandské bílé, Sauvignon, Frankovka, Modrý Portugal and Cabernet Moravia. The results from compression test pressure on stalk were between 3,65 N (Sauvignon, on 3. gathering) − 20,92 N (Frankovka, on 2. gathering), in horizontal pressure 2,24 N (Sauvignon, on 2. gathering) – 9,6 N (Frankovka, on 3. gathering). The results of penetration test were between 0,54 N (Sauvignon, on 2. gathering) – 1,82 N (Frankovka, on 3. gathering) and the results from teasing stalk from grape test were between 1,02 N (Rulandské bílé, on 1. gathering) – 3,24 N (Frankovka, 4. gathering). There were found statistically important differences between all results between vine species and periods gathering.
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Ampelografický rozbor vybraných moštových odrůd z rodiny Veltlínů
Muchová, Eva
The aim of this diploma thesis was to study the available literature and to describe selected wine grape varieties from the Veltlín family using basic ampelographic methods. For these purposes, the varieties Veltliner rotweiss, Frühroter Veltliner and Grüner Veltliner were selected. During the year, the onset of individual phenophases was monitored, the leaves, grapes and berries of the varieties were collected and described. The work was focused mainly on the leaf. Descrtiptor List Genus Vitis L. was used for the description, only some descriptors were selected. The measurement results were evaluated using tables, graphs and basic statistical methods. Cluster analysis was used for statistical evaluation.
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Hodnocení zralosti odrůd révy vinné pěstovaných na jedné lokalitě
Klusák, Dominik
The goal of this thesis has been to observe ripening of grapes in four chosen grape varietes grown in the same locality. In the literary part has described chemical composition of grape and change of sugar content, organic acids and aromatical compounds. This thesis has dealt with introduction to area where the grapes had been collected. Experimental part has dealt with collecting and evaluation of ripeness parameters, i. e. grape weight, weight of ten grape berries, strength of the grape berry, soluble fiber content, titrable acidity and processing these parameters to graphs.
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