CRediT authorship contribution statement M. Von Cossel: Conceptualization, Data curation, Formal analysis, acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Validation, Writing - original draft, Writing - review & editing. F. Lebendig: Data curation, Formal analysis, Investigation, Methodology, Resources, Software, Validation, Visualization, Writing - original draft, Writing - review & editing. M. Müller: Investigation, Methodology, Resources, Software, Supervision, Validation, Writing - Acknowledgements We are thankful for the elemental analysis of the plant biomasses conducted by colleagues of ZEA-3, Forschungszentrum Jülich GmbH, namely Dr. Sabine Willbold, Dr. Volker Nischwitz, Ms. Nadine Wettengl, Ms. Sabrina Tückhardt, Ms. Ulrike Seeling and Ms. Jennifer Pelikan. Many thanks to Ms. Marion Roeb for explanations and introduction regarding the calorimetric analysis. Special thanks to Ms. Eva Lewin for the linguistic improvement of this study. This research received funding from the Federal