Prüfung des Zweikultur-Nutzungssystems für die Bereitstellung von Energiepflanzen auf sieben Standorten in Deutschland (English shop)

Preview

Table of Contents, Datei (44 KB)
Extract, Datei (97 KB)

This dissertation evaluates the yield potential and ecological effects of a double-cropping system for energy crop production at seven locations across Germany. A three-year field experiment conducted between 2005 and 2008 compares double cropping with conventional main-crop cultivation. The system combines winter annual first crops with summer annual second crops to improve the utilization of the growing season. Investigated crops include winter rye, maize, sunflower, sorghum, sudangrass, amaranth, and hemp. The assessment covers biomass and energy yields, site-specific and climatic influences, nutrient availability, and nitrogen balances. On average, the double-cropping system achieves 10% higher annual yields in maize-based systems and 38% higher yields in sunflower-based systems compared with conventional cultivation. Its advantages are particularly evident under suitable climatic conditions and through the greater yield stability of winter crops. Furthermore, reduced soil mineral nitrogen concentrations and a lower potential for nutrient leaching are observed. The findings highlight the potential of site-adapted double-cropping systems for productive and environmentally sustainable energy crop cultivation.