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Reaction of selected varieties of potatoes for processing into starch at foliar application of fertilizers
ŠANDEROVÁ, Šárka
The aim of the study was to evaluate the impact of the application of foliar fertilizers on starch production at potato growing. The literary review contains a general introduction to the topic and furthermore there is a summary of the existing development and production of potatoes both in the Czech Republic and abroad. The results were obtained from the one-year field experiment, during which two potato varieties with different lengths of the growing seasons were planted. It was a medium-early ripening variety Priamos and the late variety Dominator. In 2014 the one-year field experiment was established, during which the effect of the application of the solution of urea, Lignohumate and Energen Fulhum was evaluated compared with the variant without the application of foliar fertilizers. The tuber yield, number of tubers per plant, weight of tubers per plant, average weight of 1 tuber, starch yield and starch content were evaluated. The annual results indicated that the foliar fertilizers had on this year the positive effect on tuber yield, but the impact on the starch yield and content has not been confirmed. Both monitored potato varieties responded positively to the application of Lignohumate - by tuber enlarging. The Priamos Variety had an average tuber yield of 50.3 t/ha and the average starch content of 20.3%. In contrast the variety Dominator had the average tuber yield of 59.8 t/ha but lower starch content, in the average by 17.6%.
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Risk assessment and perspectives of GMO cultivation in the Czech Republic
ŠANDEROVÁ, Šárka
The bachelor thesis provides an overview of the issue of genetically modified organisms (GMOs). I chose this topic because its importance is currently increasing as GMOs and their products are becoming inherent part of our lives. The areas sown with GM crops increase in the world every year and GM products are also imported to the Czech Republic. In the literature research are described methods used to insert foreign DNA into plant cells. Especially common is transformation via bacteria strain Agrobacterium using so called microprojectiles. Most often used transgenes cause the plant to gain new properties, such as tolerance to herbicides, resistance to insect pests, tolerance to stress etc. There follows a summary of the legislative conditions and the concept of coexistence in the Czech Republic, which every grower, who decides to grow GM crops, should follow. In Europe only two GM crops are allowed for commercial cultivation, Bt corn and GM potatoes. In 2010 The Czech Republic became the only European country where both the allowed crops were grown. In the thesis is also summarised existing knowledge of GM crops cultivation in the world. Finally, we evaluate potential risks associated with GM crops cultivation. Significant role in the risk assessment plays also the impact of GMO cultivation on target and nontarget organisms. We also discuss the possibilities and prospects of their cultivation in our country and in the world. The aim of the thesis is to help the readers, professional or not, understand the issue so they can form their own opinion.
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