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Gewählte Master / Diploma Thesis:

Beate Kraml (2016): Analysis of the initial vegetation development on sown sites after landslides in the valley Schwarzenseebach, Nature Park Sölktäler (Styria, Austria).
Master / Diploma Thesis - Abteilung Pflanzenbau, BOKU-Universität für Bodenkultur, pp 72. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Heavy rainfall events resulting in landslides and floods are increasing natural hazards in alpine regions. A fast and sustainable vegetation re-establishment after erosion and sedimentation is of utmost importance, especially in regions where agriculture and tourism are the main economic sectors. In this work, I analysed the initial vegetation development on revegetated sites in the valley Schwarzenseebach (Nature Park Sölktäler, Styria) after landslides devastated the mountainous area in 2010. Data was collected on 52 (4x4m) plots concerning vegetation cover, grass cover, legume cover, herb cover, bryophyte cover and straw cover in 2012. Thereby, the different measures „straw application“ and „no straw application“ were analysed as well as „lime application“ and “farmyard manure application”. Additionally, the occurring plant species were determined and their abundance was estimated using a modified Braun-Blanquet scale. The aims were to evaluate the treatments after revegetation and to show how the applied substrate affected vegetation development and plant growth. My results show that plant growth was inhibited primarily due to the bare soil with lack of humus and fine-earth fraction. Hence, vegetation cover was low (average 49%). The initial plant community was characterized by species from the disseminated seed mixtures dominated by grasses and legumes. Plots with straw cover showed significantly lower vegetation cover compared to plots with absent straw cover. Due to low soil nutrient supply (nitrogen deficiency) lime application did not increase vegetation development. The study highlighted the importance of revegetation measures after landslides and that the application of straw on bare soils has to be avoided. Humus build-up is of utmost importance. Manuring of the pastures would be an important measure, but is prohibited in the valley Schwarzenseebach due to the Natura 2000 programm. Local seed mixtures instead of commercial seed mixtures should be used.

Beurteilende(r): Liebhard Peter

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