G-FORSCHT 2015

CLIMATE CHANGE, WATER BUDGET AND GRAPEVINES IN GERMANY Extended periods without precipitation observed for ex- ample in Central Europe including Germany during the 2015 season, can lead to water deficit and reduced yield and quality for grapevines. Regional climate models pro- ject changes of precipitation amounts and patterns, indi- cating an increase of comparable situations in the future. In order to assess possible impacts of climate change on the water budget of grapevines, a water budget model was developed, which accounts for the large heteroge- neity of vineyards with respect to their soil water storage capacity and potential evaporation as a function of slope and aspect. The model was fed with data from regional climate models and a risk assessment for the wine- producing regions Rheingau and Hessische Bergstraße was conducted. The simulations showed that the risk for drought stress varied substantially between vineyard sites but might increase for steep-slope regions in the future. AUTHORS: Prof. Dr. Hans-Reiner Schultz Präsident der Hochschule Geisenheim hans.reiner.schultz@hs-gm.de Dipl.-Phys. Marco Hofmann Institut für Allgemeinen und Ökologischen Weinbau marco.hofmann@hs-gm.de 39 Abstracts INFLATABLE LAWN SUBSTRATE FOR LAWN SEED USED IN URBAN SETTINGS For economic reasons, inflatable substrates for soilless greenings in urban environments are generally delivered by large trucks and inflated with air for landscaped roofs. The currently available turf substra- tes in the market are either not inflatable or their properties are not suitable turf landscape. In this pro- ject, a practical coherent and logistically interesting substrate for turf seeds was developed. The substrate has a grain size ≤ 0/4 mm and is inflatable under practi- cal conditions. It meets the requirements of the FLL green roof guideline (2008) for intensive substrates used for multilayer constructions. For the formulation of the inflatable lawn substrate 0/4, the building material lava and pumice as well as the organic ingredients xylitol and peat, developed for urban greenings, are used. AUTHOR: Prof. Dr.-Ing. Stephan Roth-Kleyer AG Vegetationstechnik und Landschaftsbau stephan.roth-kleyer@hs-gm.de

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