University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Angelika Hromatka
(2007):
Bestimmung der mikrobiellen Biomasse in alpinen Wiesen- und Weidenböden.
Master / Diploma Thesis,
BOKU-Universität für Bodenkultur,
pp 72.
UB BOKU
obvsg
- Abstract:
- In August 1999 soil samples were taken in the Gastein valley from several different sites between 850m and 1660m above sea-level. Soil monoliths were subdivided into litter layers (2-0cm) and mineral layers (0-3cm, 3-6cm, 6-9cm). For the laboratory investigation soil samples from the sampling points at different altitudes were prepared for experiments in the laboratory. The determination of dry soil, pH, Corg-, Nt, and C/N-ratio was done by ÖNORM-methods. The soil microbial biomass was analysed by fumigation-extraction method. To estimate the fungal contribution in organic and mineral horizons Ergosterol as a biomarker for fungal biomass was measured according to Dajakirana et al., 1996. Microbial stored 137Cs was determined according to Brückmann and Walters, 1996. In conclusion the study shows that the fungal biomass is influenced by different kinds of altitude transects. High altitude transects show high amounts of fungal biomass, lower altitudes show less amounts of fungal biomass. A positive correlation between the sea-level, the fungal biomass and the soil to plant transfer factor and the microbial stored 137Cs was found. However the influence of microbial biomass in the storage and turnover of 137Cs in the soils almost 20 years after the Chernobyl-accident still seems to be of importance.
- Beurteilende(r): Gerzabek Martin