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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Vápnění lesních půd ve smrkových monokulturách ve vztahu k minerálním formám dusíku
 Končel, Karel
The liming of forest soils and its implications for the forest ecosystem can be observed from many points of view. However, the assessment of liming effects may vary considerably. To evaluate the effect of liming on the mineral forms of nitrate and the activity of soil enzymes, proteases and ureases, the experimentally limed area was used. The liming was performed using finely milled lime dolomite in doses of 2, 3, 4, 6 and 26 t·ha-1. Mixed soil samples from the humification horizon H and the organomineral horizon Ah were taken from each variant. This mixed samples were further modified and subjected to laboratory analyses. The effect of liming on ammonium and nitrate nitrogen content and protease activity was found. In the case of NH4+, NO3-, soil proteases and ureases activity, differences were observed in relation to the change in the application dose of dolomitic limestone.
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The study of enzyme activities in compost
 Pernicová, Iva ; doc.Mgr.Pavlína Pelcová, Ph.D. (referee) ; Voběrková, Stanislava (advisor)
This thesis deals with the determination of enzyme activities in compost for consideration their changes during the composting. The changes in the activity of particular enzymes serve as the indicators of the activity of microorganisms, which are found in the compost. In the practical part of the work the changes in activity of proteases, cellulases, lipases, dehydrogenases and ureases within 21 days of composting under laboratory conditions were determined. The change in pH was observed as well. The changes in the pH-values and all enzyme activities except ureases present in the first week the same trend associated with the use of available substrates. The changes in the activities of the key enzymes in compost under laboratory conditions were compared with the changes in activities in compost under real conditions, which is the indicator of the different composting process under the given circumstances.
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