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The influence of KPÚ on the degree of ÚSES realization in selected extensively used agricultural parts of South Bohemian region
SEKALOVÁ, Martina
The present study deals with evaluation of complex land adjustments on ecological stability of an extensively used agricultural area. The study was made in Prasetín area (district Tábor). Following given parameters a comparison of initial, projected and real situation was made. Afterwards, the area was surveyed in detail in order to compare projected and real situation. The comparison revealed significant changes in a web of ecosystem stability function before and after land adjustment. By a zonation method the landscape was divided into geoecological sites that were integrated in bioecological zones A, B, C, D. The ecocritical zones leading to ecocritical situations were determined between unsmooth transitions of bioecological zones.
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Possibility of water and nutrient retention increase in agricultural landscape on example of Třeboňsko area
LHOTSKÝ, Richard
Possibility of water and nutrient retention increase in agricultural landscape on example of Třeboňsko area is subject of PhD thesis presented here by Mgr. Richard Lhotský. PhD thesis is divided into three main chapters that try to answer three basic questions: 1. How far is possible to increase landscape water retention using fishponds? 2. Large amount of nutrient and soil leach arable land, both causing surface water euthrophication and a bigger sedimentation in fishponds. Is it possible to moderate these harmful effects? 3. If wetlands became a part of landscape features how to utilize plant biomass from these areas. Fishponds or even whole fishpond system is a specific component of czech rural landscape and fulfill several important functions. Water accumulation and retention are the most important considering the thesis ? fishponds collect water from a catchment area and also collect floodwaves. Current agriculture based on originally steppe crop needs amelioration. In spite lot of positive features we have to bear in mind that water drainage systems increase mineralization of an organic matter in soil and nutrient loss which might be economically important as well as decrease of surface water quality due to the euthphication. Wetlands and small water bodies (fishponds) may play important role as a nutrient trap in agricultural catchment areas, reuse them and prevent their loss from a landscape and whole Czech Republic. It is necessary to solve a utilization of plant biomass from nutrient and water retention areas and use that in biogas plants seems to be one of the most promising.
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