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Organic Agriculural Science

University of Kassel » Fachbereiche » Faculty of Organic Agricultural Sciences » Boden- und Pflanzenbauwissenschaften

Phone:

+49 5542 98-1630

Fax:	+49 5542 98-1633

URL:	http://www.uni-kassel.de/agrar/dec/?language=de

Address:

Nordbahnhofstr. 1a
37213 Witzenhausen

Persons

Prof. Dr. Bernard Ludwig

Past Persons

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Projects

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04/2023 - 03/2026	Designed experiments for optimizing infrared spectroscopic characterizations and quantifications of soil organic matter at scales of increasing complexity: importance of band shifts, spectral variable selection and subtraction approaches
01/2022 - 11/2025	Combined use of laboratory-based and portable infrared and x-ray fluorescence spectroscopy approaches for the spatial-vertical characterization of samples of selected soil groups
04/2021 - 03/2024	Are interactions of labile substrates with biochars the key process explaining C stabilization by biochars? A proof of concept by isotopic approaches
02/2019 - 12/2020	PPP China ab 2018
04/2018 - 12/2021	Synergetic use of mobile and lab-based spectroscopic techniques (vis-NIR, lab and hand-held MIR, portable hyperspectral frame camera) to optimize the determination of soil properties with high variability in time and space
2016 - 2019	FOR 2432: Social-Ecological Systems in the Indian Rural-Urban Interface: Functions, Scales, and Dynamics of Transition - Teilprojekt: Intensivierungseffekte auf Stoffflüsse in Rural-Urbanen Anbausystemen in der Forschergruppe
2016 - 2019	Social-Ecological Systems in the Indian Rural-Urban Interface: Functions, Scales and Dynamics of Transition. Cluster A: Matter flows in rural-urban cropping systems
11/2014 - 06/2017	Understanding the role of root, mycorrhizal and microbial turnover in forest ecosystems
06/2013 - 2016	Effects of water content, input of roots and dissolved organic matter and spatial inaccessibility on C turnover & determination of the spatial variability of subsoil properties (Teilprojekt der Forschergruppe FOR 1806: Der vergessene Teil des Kohlenstoffkreislaufs: Lagerung und Umsatz des organischen Materials im Unterboden)
09/2011 - 2014	Bedeutung der Stickstoff-Aufnahmepfade von Mikroorganismen im Boden

Publications

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16 of 17

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2004	Fuchs, U.B.., Brünken, S., Fuchs, G.W., Thorwirth, S., Ahrens, V., Lewen, F., Urban, S., Giesen, T., Winnewisser, G., 2004. High resolution spectroscopy of HCN isotopomers: H13CN, HC15N, and H13C15N in the ground and first excited bending vibrational state. Z. Naturforsch. 59a, 861–872.
2004	Teepe, R., Beese, F.O., Brumme, R., Ludwig, B., 2004. Nitrous oxide emission and methane consumption following compaction of forest soils. Soil Science Society of America Journal 68, 605–611. https://doi.org/10.2136/sssaj2004.6050
2004	Ludwig, B., 2004. Variability of CO2 and N2O emissions during freeze-thaw cycles: results of model experiments on undisturbed forest-soil cores. Journal of Plant Nutrition and Soil Science 167, 153–159. https://doi.org/10.1002/jpln.200321313
2003	Ludwig, B., 2003. Carbon dynamics determined by natural C-13 abundance in microcosm experiments with soils from long-term maize and rye monocultures. Soil Biology and Biochemistry 35, 1193–1202. https://doi.org/10.1016/S0038-0717(03)00180-9
2003	Ludwig, B., 2003. Kohlenstoffumsatz in aggregierten Böden - Messung anhand der natürlichen 13C-Verteilung. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 102, 351–352.
2003	Ludwig, B., 2003. Modeling cation exchange in an undisturbed subsoil at different flux rates. Soil Science 168, 253–266. https://doi.org/10.1097/01.ss.0000064889.94869.7e
2003	Michel, K., Ludwig, B., 2003. Modellierung des Kationenaustauschs in gestörten und ungestörten Böden. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 102, 215–216.
2003	Michel, K., 2003. Response of enzyme activities to nitrogen addition in forest floors of different C-to-N ratios. Biology and Fertility of Soils 38, 102–109. https://doi.org/10.1007/s00374-003-0622-5
2003	Ludwig, B., 2003. Stabilisierung des maisbürtigen Kohlenstoffs in einem sandigen Boden: experimentelle und Modellierungsergebnisse. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 102, 369.
2003	Ludwig, B., John, B., Ellerbrock, S., Kaiser, M., Flessa, H., 2003. Stabilization of Carbon from maize in a sandy soil in a long-term experiment. European Journal of Soil Science 54, 117–126. https://doi.org/10.1046/j.1365-2389.2003.00496.x

Other Research Activities

09/2022	Robustness of laboratory vs in situ mid-infrared spectroscopy for prediction of soil total and fraction organic carbon contents at the field and regional scale Presentation
12/2021	High-level Fusion of X-ray Fluorescence and Visible/Near- and Mid-Infrared Data Provides Robust Predictions for Diverse Soil Properties at the Field Scale Presentation
04/2019	Prediction of labile carbon pools in soil using near and middle infrared spectroscopy Presentation
08/2019-07/2019	Research Exchange with the Chinese Academy of Sciences Stay abroad
08/2019	Substitution of mineral fertilizers with biogas digestate plus biochar increases physically stabilized soil carbon but not crop biomass in a field trial Presentation
04/2017	Effect of mineral versus organic fertilizers in combination with biochar on aggregation and organic matter dynamics of a sandy soil Poster presentation
06/2016	Biomarkers in soil science: tracing the fate of plant and microbial originated C and N Presentation
06/2016	Sugars in soil – sweets for microorganisms? Presentation
06/2016	Turnover of microbial cell compartments based on isotope labeling Presentation
04/2011	European Geosciences Union General Assembly Conference or similar event