National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Souvislost změn v cyklech dusíku a uhlíku v lesních půdách po odumření stromového patra
TUPÁ, Adéla
The bachelor's thesis deals with changes in nitrogen and carbon cycles in coniferous forest soils after tree layer dieback due to forest disturbance. The thesis focuses on changes in nitrification and availability of nitrates in soils in connection with microbial biomass and carbon availability, especially in the forests with non-intervention management. This thesis contains of two parts, a literature review, and a scientific project proposal, which aims to verify possible validity of heterotrophic-competition hypothesis of microbes in soils.
Vliv kyselé a dusíkové zátěže na dostupnost dusičnanů v lesních půdách
KOTOUNOVÁ, Adéla
The Czech Republic faced high acid deposition in the past that altered soil chemistry and nitrogen (N) cycle. However, it is not clear whether the changes are related to soil acidification or to the nutritional effect of N. The aim of this study was to determine the availability of nitrates in the beech and spruce forest soils and to determine how it is influenced by acid and N addition (application of sulfuric acid and ammonium nitrate; a six-year field experiment in the Ore Mountains). Other soil characteristics influencing nitrates were evaluated: net N mineralization and nitrification, the availability of ammonium and microbial biomass. Soil acidification affected spruce forest nitrification while N addition increased beech forest microbial biomass.

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