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Gewählte Doctoral Thesis:

Doctoral Thesis - Abteilung Pflanzenbau, BOKU-Universität für Bodenkultur, pp 114. UB BOKU obvsg

Data Source: ZID Abstracts
Climate change most likely alters agro-climatic environment in the future. This requires suitable adaptation options to adjust crop management with local characteristics in order to sustain crop production. The objectives of this thesis were first to assess differences between two wheat genotypes in their strategy to adapt their root system to dry conditions and second evaluation of different adaptation strategies (i.e., local soil and climatic conditions, nitrogen fertilizer application and cropping system practices) for a sustainable wheat production. The study region was located in Eastern Austria with current climate condition of cool semi-arid. Results of this thesis, indicated that: I. Average wheat biomass production decreased by 15% in the water limited year of 2008 compared to 2009 reflecting from different root growth patterns and strategies. II. The simulation study relied on the integration of the Agricultural Production Systems Simulator (APSIM) with three Global Circulation Models (GCMs) including baseline (BL, 1981-2010), IPCM4 and MPEH5 each either high (A1B) or low (B1) CO2 emission rates. APSIM was successfully parameterized and evaluated for simulation of productivity of wheat crops grown under different N supply levels in the 2010/11 and 2011/12 years. Wheat yields for the CGMR scenario slightly increased above the BL, while IPCM4 projections reduced by 29 and 32% with low or high emissions, respectively. Under future climatic, maximum wheat yields were predicted when crops are sown early (Sep. 20) with 160 kg N ha-1 applied at earlier dates than the current practice. III. Intercropping evaluation showed greater dry matter and yield in sole cropping than in intercrops in both years. Wheat yield decreased by 35% in the dry year of 2011-12. Replacing 25% of total wheat cropping land area with rapeseed can be a profitable choice compared to other intercropping ratios and sole cropping of either component crop. In total, it is evident that selecting efficient and applicable adaptation options as well as suitable cultivars will play a key role to support sustainable wheat production in the future.

Betreuer: Kaul Hans-Peter
1. Berater: Bodner Gernot
2. Berater:

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