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Vliv vybraných podmínek prostředí na klíčení semen plevelů
Navrátil, Tomáš
The aim of this thesis was to find out the influence of temperature on germination seeds of Galium aparine. There were suggested labour experiments. In the first experiment seeds were exposed to various temperatures. In the second experiment was monitoring the influence on germination of seeds which were exposed to frost for a specific time. Best germination had seeds at 6 °C. In the second experiment the best germination had seeds that were exposed to frost for five days. Average total germination of all seed were 65.8%. Results have been written to the tables and processed to graphs. Evaluation of the work is adduced in discussion.
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Vliv rozmístění živin v půdním profilu na konkurenci mezi plevely a plodinou
Panoc, Jan
Nitrogen is one of the most important part of nutrition of winter wheat. However, if in the crop are weeds capable of using nitrogen more efficiently, the area-wide fertilization can make competitive ability higher for weed, after that there is a reduction in the yield of wheat. Example of weed with this ability is cleavers (Galium aparine). Possibility how we can eleiminate this weed ability is using precision placement of fertilizer under the crop row. The aim of this thesis is finding out of positive effects of precision placement of nitrogen fertilizer (calcium nitrate) in comparison with area-wide fertilization for reduction competitive ability of cleavers against wheat. The experiment was containerized and was run in a growth room with controlled conditions. Based of the experiment, it was found, that competition of cleavers was decreased by precision placement of fertilizer but growth of wheat was decreased too because of higher nitrate availability in the soil. This method of fertilization does not produce the expected effect for better wheat competitive ability.
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Vliv vybraných podmínek prostředí na klíčení semen plevelů
Navrátil, Tomáš
The aim of this thesis was to find out the influence of temperature on germination seeds of Galium aparine. There were suggested labour experiments. In the first experiment seeds were exposed to various temperatures. In the second experiment was monitoring the influence on germination of seeds which were exposed to frost for a specific time. Best germination had seeds at 6 °C. In the second experiment the best germination had seeds that were exposed to frost for five days. Average total germination of all seed were 65.8%. Results have been written to the tables and processed to graphs. Evaluation of the work is adduced in discussion.
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Biology and control of catchweed
VONDRUŠKA, Jakub
A very limited range of crops provides the human nutrition. In some time there was selected a little amount of weedy species that plays an important role with respect to quantum and danger. Galium aparine belongs to these species. Therefore an herbicide experiment was carried out with Triticum aestivum catering for a chemical regulation of this weed. In particular 26 varieties of a half of a hectare there was used 21 herbicide preparations and their combinations altogether in demanding conditions of low preparation of soil. It was realised at a land with a large amount of Galium aparine. Most of the preparations had a very good effect regarding the actual control. At some of them Galium aparine nevertheless outgrew and produced seeds. Although these seeds were produced in a little amount, they supply the reserve in a soil. In the literary recherche are described biology, harmfulness and potential methods of regulation of Galium aparine.
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