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The effect of supplementary feeding of market carp by cereal feeds on water quality
STROUHAL, Jiří
The purpose of this thesis was monitoring the impact of supplementary feeding to selected parameters of water quality (temperature, oxygen, pH, alkalinity, conductivity, turbidity, total suspended solids, chlorophyll a, CODCr, BOD5, TP, P PO43-, TN, N NH4+, N NO3). This experiment took place in storage ponds in Třeboň for 120 days. For the supplementary feeding were used nonmodified wheat, thermally wheat and thermally and pressed wheat. There were chosen 2 storage ponds for every group. Fish were fed 3 times a week. For comparison of results it was deployed a.k.a control where fish were dependent on natural food. It was taken total 12 samples in which were determined chemical and physical properties of water. Only one statistic (p < 0,05) difference was recorded in concentration of oxygen in storage ponds, where fish were fed by thermally and pressed wheat (5,79 + - 1,38 mg.l-1) in comparison with control (7,00 + - 1,73 mg.l-1). Other parameters did not exhibit significant changes among the monitored groups (p > 0,05).
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A effect of drainage system on quality of surface water
KAMARÝT, Jiří
My bachelor thesis is focused on quality of surface water. My thesis is written by the form of framework literature search. And it inteferes with the fields of climatology, geology, topography and especially hydrology and water chemistry. The content of the literature search is getting acquainted with the reasons of building of underdrainage and its particular development in the Czech Republic. Furthermore there are contrivances described which cause the change of quality of water after building drainage system and quantification of holding of drainage systems in concentration of analytes of surface water. Water is important environmental component in nature and it is necessary to pay attention to its high quality. The soil contrivances, causing pollution of surface water, were considerably affected by building of drainage system in a large area of the Czech Republic in 1950?s. Those drainage systems were built due to intensive agriculture. But there were no thoughts about following conservation of countryside, particularly water and soil. There still have been consequences of insensitive interference with countryside even these days. My bachelor thesis can be used as a base for my thesis which is supposed to enrich it with my own measurement and further comparison.
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