University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Jasmin Schiefer
(2013):
ANALYSING DIFFERENT SOIL ORGANIC MATTER POOLS IN CLAY SIZED MICROAGGREGATES ALONG A SOIL AGE GRADIENT IN THE MARCHFELD, AUSTRIA.
Master / Diploma Thesis - Institut für Bodenforschung (IBF),
BOKU-Universität für Bodenkultur,
pp 72.
UB BOKU
obvsg
FullText
- Abstract:
- Soil organic matter and its different pools (labile, ore stable, stable) in clay sized microaggregates along a chronosequence (10- 4500 years) in the A and AC horizon were analyzed to receive information of processes behind the co- evolution of the formation of microaggregates and SOM and SOM stabilization mechanisms. The study area is located in the floodplain of the Danube River, east of Vienna (Austria), the soils are classified as Fluvisols and Chernozems and soils were taken from different land use management systems. After receiving clay sized microaggregates (>2 µm) with ultrasound and centrifugation, basic physical and chemical analysis and a Simultaneous Thermal Analysis (STA) were performed. Forest sites show a steep increase of SOM in the first years of soil development and after ~350 years clay minerals cannot store significantly more SOM with time. Sites used as cropland do not follow such a trend and the STA shows that they contain the highest amount of more stable pools. The received data allowed a rough calculation of the annual soil formation rate which is very high at the beginning of soil formation (up to 4 mm/year) and decreases to ~0.1mm after 2000 years.
- Beurteilende(r): Blum Winfried E.H.
- 1.Mitwirkender: Lair Georg