Identification of the Optimal Harvest Date for the Energy Crops Sudan Grass (Sorghum Sudanense) and Jerusalem Artichoke (Helianthus Tuberosus L.)

K. Wünsch, S. Gruber & W. Claupein
High-yealding crops are needed to produce renewable energy based on biomass. Two not yet widely used but promising crops in term of yield potential are Sudan grass (Sorghum sudanense (Piper) Stapf) and Jerusalem artichoke (Helianthus tuberosus L.). Basic concepts for the cultivation are still missing. The objective of this study was to determine the optimal harvest dates and levels of nitrogen fertilization for Sudan grass and Jerusalem artichoke to achieve highest biomass yields. The effects...