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Charakteristika nových hybridů silážní kukuřice
Stejskalová, Šárka
This bachelor thesis focuses on the characteristics of early maturing corn silage hybrids from the VP AGRO company. The selected hybrids were compared according to the yields of the green matter (t/ha), dry matter (t/ha and %) and according to the price level of seeds (Kč/SU). The data were collected from field trial records that took place between 2011 and 2022. These field experiments took place in the Czech potatoe agricultural sector in the Vysočina region at the following stands: Bobrová, Častrov, Horní Krupá, Okrouhlička, Počátky, Pohled, Pozovice, Radostín, Stonařov and Věž. Twelve hybrids were selected for the purpose of the study. The hybrids were subsequently divided according to the year of registration in the Czech Republic, followed by their detailed description and analysis. Based on the collected data, the following results were found. The total yields of green matter for all hybrids showed very similar and high values (50 t/ha). On the contrary the results of dry matter yields differed for each hybrid (16–18 t/ha). Additionally, similar fluctuations of dry matter in percent (34–38 %) were found. This high level of percentages of dry matter was caused by climate, soil conditions and different properties of individual hybrid. Regarding the economic comparison, the rising trend of the price level was confirmed, as is the case in the entire national sector. Seed prices have been affected by climatic, socio, political, and economic changes. One of the reasons for the price increase proved to be bad weather conditions (drought) in France, the state where the selected hybrids are bred.
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The posibility of applying corn hybrids with FAO number 300 in less favored areas
SLANEC, Roman
The aim of this thesis was to evaluate and compare production of biomass and dry matter of silage corn hybrids with different time of earliness - Ronaldinio (Z 240/S 250), Agro Vitallo (Z 270/S 280) and Balasco (Z 370/S 380). This experiment was realized on a field near České Budějovice ( 400 m.a.s.l.) and the resuls were compared to results of a pilot plant experiment realised by KWS OSIVA s.r.o. in ZOD Podhradí Choustník ( 562 m.a.s.l.). All startings of phonological phases were studied according to BBCH-scale in the course of vegetation period. Samples were taken before the harvest to test for contents of dry matter in biomass. They were used to determine the optimal harvest period. These parametres were observed during the harvest : plant height, biomass yield, dry matter of biomass, corncobs yield, share of corncobs, dry matter of corncobs, dry matter yield. The resuls showed succesful use of corn hybrids with higher FAO number (Balasco) in areas of less favourable conditions. Corn is one of the plants very dependent on the course of the year.
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