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Gewählte Master / Diploma Thesis:

Martin Kappel (2020): Ökobilanzierung von Milchviehstallsystemen im österreichischen Berggebiet - Vergleich von Anbindehaltung und Laufstall-Weide-Systemen mit besonderer Berücksichtigung des Wirtschaftsdüngermanagements.
Master / Diploma Thesis - Institut für Landtechnik, BOKU-Universität für Bodenkultur, pp 135. UB BOKU obvsg FullText

Data Source: ZID Abstracts
About a third of Austrian dairy cows is kept in tied housing systems, mainly in Alpine regions. Various challenges force farmers to consider changing from tied to loose housing. The main focus of this study is the assessment of the potential environmental impacts of constructing and operating the building as well as the manure management before and after the change from tied to loose housing. The evaluation is based on primary data of two case study dairy farms that have already completed the conversion. The LCA (life cycle assessment) includes the following impact categories: Global warming potential (GWP), fossil resource scarcity, freshwater eutrophication potential, terrestrial acidification potential and terrestrial ecotoxicity. The functional units refer to one housing spot per livestock unit (one cow)/year and to one kg of milk. Results show that there is a significant increase in environmental impacts after the conversion in almost all studied impact categories. These increases are mainly related to changes in manure management systems and therefore to according emissions. Environmental impacts of the stable construction are lower for both farms after the conversion and in general of minor importance. The total GWP of the two processes “housing system” and “manure management” for farm “1” sums up to 1.754,10 kg CO2-Eq./cow/year before and to 2.115,86 kg CO2-Eq./cow/year after the conversion – for farm “2” it is 1.736,03 kg CO2-Eq./cow/year before and 1.954,41 kg CO2-Eq./cow/year after a change of housing systems. The processes related to the stable and to manure management account for around 20-26% of the total GWP caused by the whole milk production chain (also including enteric fermentation and fodder production). The remaining 74-80% are caused by enteric fermentation and fodder production. Changing to loose housing systems can still be justified for animal welfare reasons, but special attention shall be paid to manure management related emissions.

Beurteilende*r: Gronauer Andreas
1.Mitwirkender: Kral Iris
2.Mitwirkender: Bauer Alexander

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