• Boden und Standortkunde
• Grundlagen der pflanzlichen Produktion

Professional Experience

Since 01.09.2012Professor for Soil Science, Plant Nutrition and Agro-EcologyDepartment of Agriculture and Food Economy Hochschule Weihenstephan-Triesdorf, University of Applied SciencesAm Hofgarten 4, D-85354 Freising, Germany

02/2007 – 08/2012
Head of a research team for analyzing and optimizing the anaerobic digestion process of agricultural feedstock
Institute for Agricultural Engineering and Animal Husbandry
Vöttinger Str. 36, D-85354 Freising, Germany

04/1997 – 12/2006
Post-doc research assistant at the Chair of Plant Nutrition
Technical University of Munich (TUM)
Am Hochanger 4, D-85354 Freising, Germany
Topic: N-Cycling in organic agriculture and horticultureTasks: Head of the lab for NIRS and IRMS (13C and 15N), teaching, project acquisition and management, team management

02/1993 – 03/1997
PhD-student at the Chair of Plant Nutrition, TUM
Topic: Measurement of N2-fixation of legumes in field
Tasks: head (starting from 1994) of the lab for IRMS (13C and 15N), project management, teaching

Education

1999
Dissertation (Prof. Dr. N. Claassen)
Title: N2-Fixierung von Körnerleguminosen: Aussagekraft und Weiterentwicklung vorhandener Messmethoden am Beispiel Lupinus albus L. (N2-fixation of grain legumes: validity and further development of existing measurement methods using Lupinus albus L.)

10/1984 - 12/1992
Studies of Agro-Biology at the University of Hohenheim, Stuttgart
Diploma-thesis was prepared with Prof. Dr. H. Marschner and Sen. Lect. E.A. Kirkby (Leeds University)
Title: Auswirkungen von Phosphormangel auf das Wachstum und die Nährstoffaufnahme von Tomatenpflanzen in Nährlösung (Effect of P deficency on growth and nutrient uptake of tomato plants in nutrient solution)

Special interests

On-line measurement of processes
modern analytical tools, especially IRMS and NIRS
teaching                

• Studiendekan Landwirtschaft
• Mitglied im Fakultätsrat AE

• J. Rath, H. Heuwinkel, F. Taube und A. Herrmann (2014): Predicting specific biogas yield of maize-validation of different model approaches. BioEnergy Research, published online 5th Dec 2014.
• V. Dandikas, H. Heuwinkel, F. Lichti, J. E. Drewes and K. Koch (2014): Correlation between biogas yield and chemical composition of energy crops. Bioresource Technology, 174, 316 - 320.
• D. Polag, L. C. Krapf , H. Heuwinkel, S. Laukenmann, J. Lelieveld und F. Keppler (2014): Stable carbon isotopes of methane for real-time process monitoring in anaerobic digesters. Engineering in Life Sciences, 14, 153-160.
• D. Polag, H. Heuwinkel, S. Laukenmann, R. Conrad, M. Greule, J. Lelieveld, F. Keppler (2013): Evidence of anaerobic syntrophic acetate oxidation in biogas batch reactors by analysis of 13C carbon isotopes. Isotopes in Environmental & Health Studies, 49, 365-377.
• J. Rath, H. Heuwinkel und A. Herrmann (2013): Specific biogas yield of maize can be predicted by the interaction of four biochemical constituents. BioEnergy Research, 6, 939-952.
• L. C. Krapf, D. Nast, A. Gronauer, U. Schmidhalter und H. Heuwinkel (2013). Transfer of a near infrared spectroscopy laboratory application to an online process analyser for in situ monitoring of anaerobic digestion. Bioresource Technology, 129, 39–50.
• L. C. Krapf, H. Heuwinkel, U. Schmidhalter und A. Gronauer (2013). The potential for online monitoring of short-term process dynamics in anaerobic digestion using near-infrared spectroscopy. Biomass and Bioenergy, 48, 224-230.
• L. C. Krapf, A. Gronauer, U. Schmidhalter und H. Heuwinkel (2012). Evaluation of agricultural feedstock-robust near infrared calibrations for the estimation of process parameters in anaerobic digestion. Journal of Near Infrared Spectroscopy, 20, 465-476.
• M. I. Khalil, U. Schmidhalter, R. Gutser und H. Heuwinkel (2011): Comparative efficacy of urea fertilization via supergranules versus prills on nitrogen distribution, yield response and nitrogen use efficiency of spring wheat. Journal of Plant Nutrition, 34, 779 — 797.
• L. C. Krapf, A. Gronauer, U. Schmidhalter und H. Heuwinkel (2011). Near infrared calibrations for the estimation of process parameters of anaerobic digestion of energy crops and livestock residues. Journal of Near Infrared Spectroscopy, 19, 479-493.
• S. Laukenmann, D. Polag, H. Heuwinkel, M. Greule, J. Lelieveld, A. Gronauer, F. Keppler (2010): Identification of methanogenic pathways in anaerobic digesters using stable carbon isotopes. Engineering in Life Science, 10, 509–514.
• F. Keppler, S. Laukenmann, J. Rinne, H. Heuwinkel, M. Greule, M. Whiticar, J. Lelieveld (2010): Measurements of 13C/12C Methane from anaerobic digesters: comparison of continuous-flow isotope ratio mass spectrometry and optical spectrometry. Environmental Science & Technology, 44, 5067-5073.
• M. Lebuhn, F. Liu, H. Heuwinkel, und A. Gronauer (2008): Biogas production from mono-digestion of maize silage – long-term process stability and requirements. Water Sci. Tech. 58(8), 1645-1651.
• C. Stadler, S. v. Tucher, U. Schmidhalter, R. Gutser und H. Heuwinkel (2006): Nitrogen release from plant-derived and industrially processed organic fertilizers used in organic horticulture. J. Plant Nutr. Soil Sci., 169, 549-556.
• Locher, F., H. Heuwinkel, R. Gutser und U. Schmidhalter (2005). The legume content in multispecies mixtures as estimated with Near Infrared Reflectance Spectroscopy: method validation. Agronomy Journal, 97, 18-25.
• Locher, F., H. Heuwinkel, R. Gutser und U. Schmidhalter (2005). Development of a NIRS calibration to estimate legume content of multispecies legume-grass mixtures. Agronomy Journal, 97, 11-17.
• Heuwinkel, H., R. Gutser, N. Claassen und U. Schmidhalter (2001). N2-fixation estimated by 15N natural abundance can be erroneous because of changes in 15N-discrimination during N-uptake. In: W.J. Horst et al. (Eds.): Food security and sustainability of agro-ecosystems, 654-655.
• Heuwinkel, H., E.A. Kirkby, J. Le Bot und H. Marschner (1992). Phosphorus deficiency enhances molybdenum uptake by Tomato Plants. Journal of Plant Nutrition, 15, 549-568.