Abstract-Band KLIFF-Tagung 2.und 3.9.13

Thema 3: Auswirkungen auf Pflanzen, Tiere und ÖkosystemeThe experiment was conducted in a greenhouse at the Universityof Göttingen, from April to November 2012, and followed a twofactorialdesign with three harvest dates, relating to an establishment,a drought stress and a regeneration phase (18, 5.5 and 5.5weeks). Monocultures of Agrostis stolonifera L. Barifera, Festucaarundinacea Schreb. Mustang, Festuca rubra L. Rossinante, Loiliumperenne L. Bargold, Poa pratensis s. str. Julius and Poa supinaSchrad. Supreme were subjected to two levels of volumetric soilwater content (treatment and control), including three droughtstages (pF 1.8 – 2.3, 2.3 – 4.2 and 2.6 – 4.2). PVC tubes with aheight of 30 cm were organized in four completely randomizedblocks, comprising 120 pots in total. Dry matter, vertical root distributionand tiller density were measured and a dry matter productionindex (DMPI) was calculated. Effects of species and treatmentwere determined by two-way ANOVA.After the drought stress phase, nearly all species showed a reducedaboveground dry matter (78.1 – 96.6 %), whereas root drymatter was only reduced for F. rubra by 20.2 %. However, a highershare of root biomass in the water-bearing soil layer was foundfor F. rubra, L. Perenne and P. pratensis by 4, 5 and 4 %, whichmay indicate an adaptation to drought by root plasticity. Tillerdensity differed between species but was not affected by droughtstress treatment. P. supina showed no response to the treatment,thus, using the DMPI to evaluate aboveground performance, itperformed best (96.8 %). In contrast, the lowest DMPI was foundfor F. arundinacea (78.1 %). The experiment confirmed the expectationof different drought susceptibilities between species. BothDMPI during drought phase and growth adjustment must be consideredto do an evaluation.turf grass species, drought stress, dry matter production index,root plasticityEinfluss des Waldbodens von Buchenwäldern auf die Biodiversitätvon KäfernMartin Gabriel, Stefan SchützGeorg-August-Universität Göttingen, Fakultät für Forstwissenschaften undWaldökologie, Büsgen-Institut86