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The bioenergy subproject investigates the relationship
between biodiversity and the energetic conversion potential along a floristic
gradient of distinct grassland species compositions. Furthermore, the accuracy
of calibrations predicting energy parameter by measurements of spectral
signatures will be identified and analysed regarding the diversity effects
involved.
The design of the Jena-Experiment with diversity
gradients of up to 60 species and 4 functional groups is a powerful background
to quantify the range of energy properties in conversion processes like
anaerobic fermentation (of silage) and combustion (of hay) affected by
biodiversity characteristics. To efficiently estimate substrate attributes,
spectral reflection signatures are measured on different stages of plant
biomass processing including undisturbed swards in the field, unprocessed
silage and hay as far as dried and grinded lab samples. On each stage,
calibrations are developed to estimate substrate quality rapidly and early, in
order to optimize process control during energy conversion.
This subproject develops basic knowledge for a sward
specific conversion management considering the whole process chain of bioenergy
utilization. The unique experimental design of the Jena-Experiment with its
distinct diversity criteria along with the adoption of innovative sensor based
methods facilitates new basic benchmarks for an energetic use of extensively
managed grassland.
Homepage:
www2.uni-jena.de/biologie/ecology/biodiv/
Fig. 2: Spectroscopic methods for different rawmaterials |
Fig. 1: Jena-Experiments 1, aerial image
Promoted by Deutsche Forschungsgemeinschaft
Support Code: WA
2135/2-1
Contact persons:
Jan Harndorf, Dipl. Geoökol.
Björn Reddersen, Dipl. Geoökol.
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