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Genetic Modified Organisms - Hope or Danger?
VLÁŠKOVÁ, Alena
My bachelor degree thesis deals with the modern phenomenon of genetically modified organisms (GMO). I have selected this subject as the GMO issue is highly topical and, in my opinion, fairly neglected in the Czech Republic. On one side, the benefits of organic food have been ever more emphasized and, on the other side, there are relatively many foodstuffs containing genetically modified components. However, it should be noted at this point that many consumers do not have the slightest idea about it. This is partly caused by the fact that consumers have little information about product compositions as labels often use very small and illegible fonts. The main objective of the thesis is to improve the awareness of genetically modified organisms. I have used an anonymous questionnaire survey to find out differences in the awareness about the issue among residents of the South Bohemian and Pilsen regions. The total number of distributed questionnaires was 100, i.e. 50 for each of the regions. The return rate of the questionnaires was 100 %. The respondents were selected at random. I have formulated 4 basic hypotheses in my research work. The first: The awareness of GMO is very low. This hypothesis has been confirmed. The second: The prevailing opinion among the respondents is that GMO are harmful. This hypothesis has been confirmed because most of the respondents (67 %) believe that GMO are harmful to health. The third: Most of the respondents do not primarily focus on the composition and origin of foodstuffs when they do the shopping. This hypothesis has not been confirmed because this type of information plays an important role for an ever increasing number of people. The fourth: When respondents do the shopping the price of foodstuffs is more important than the quality. This hypothesis has been rebutted because most of the respondents (74 %) do their shopping primarily based on the price and quality ratio. The results of this thesis may be further used for public education about GMO issues within a public discussion about the topic.
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Regulation ways of Scentless weed apperance
BEČVÁŘ, Stanislav
It is spoken about persistentent weed called Scentless Mayweed in this graduation theses, whose became more expandable hand in hand with gradual passage of some companies to the minimisational methods of the soil processing. The biology and morfology of Scentless Mayweed is described in this theses, so as gadgetries of his diffusion and on this priciples of this knowledge the weedy si discussed. There are many methods of feedback control described {--} mechanical so as chemical and its subseqent economical evaluatin and its matching. This issue tries to clear up why the stress of this weed on arable crop is so hard, why it is so successful weed at the point of wiew of competitive relations and what sort of mechanisms are used. At the advances that were show round in Kluky in former Písek county it was found out the influence of the herbicides and subsequently the remedial measures for weed control were accepted.
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The control of weeds in maize stand
BÍLÁ, Alena
For processing my theses I chose an agricultural company Agroprofit Chotýčany s.r.o, that concentrate mostly on the production of maize silage for biogas power station. The firm has been using the non-tillage system of soil cultivation for a several years, which contributes to a higher occurrence of weeds in a soil. Therefore I tried to control the most significant weeds chemically (Tripleurospermum inodorum, Polygonum convolvulus, Echinochloa crus-galli, Amaranthus retroflexus, Chenopodium album, Cirsium arvense) in Zea mays. I was monitoring especially Elytrigia repens that is difficult to fight in the non-tillage system of soil cultivation. The experiment was being realised for two years. There were used 14 herbicide preparations and their combinations in 8 varieties at 4 hectares. The preparations were analysed considering their affect on weeds and economical viewpoint.
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