EGU2020-15243, updated on 04 Dec 2020
https://doi.org/10.5194/egusphere-egu2020-15243
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Systemic modelling of soil functions under the impact of agricultural management

Sara König1, Ulrich Weller1, Birgit Lang2, Mareike Ließ1, Stefanie Mayer3, Bastian Stößel1, Hans-Jörg Vogel1, Martin Wiesmeier3, and Ute Wollschläger1
Sara König et al.
  • 1Helmholtz Centre for Environmental Research - UFZ, Soil System Science, Halle (Saale), Germany (sara.koenig@ufz.de)
  • 2Senckenberg Museum of Natural History, Görlitz, Germany
  • 3TUM Technical University of Munich, Germany

The increasing demand for food and bio-energy gives need to optimize soil productivity, while securing other soil functions such as nutrient cycling and buffer capacity, carbon storage, biological activity, and water filter and storage. Mechanistic simulation models are an essential tool to fully understand and predict the complex interactions between physical, biological and chemical processes of soil with those functions, as well as the feedbacks between these functions.

We developed a systemic soil model to simulate the impact of different management options and changing climate on the named soil functions by integrating them within a simplified system. The model operates on a 1d soil profile consisting of dynamic nodes, which may represent the different soil horizons, and integrates different processes including dynamic water distribution, soil organic matter turnover, crop growth, nitrogen cycling, and root growth.

We present the main features of our model by simulating crop growth under various climatic scenarios on different soil types including management strategies affecting the soil structure. We show the relevance of soil structure for the main soil functions and discuss different model outcome variables as possible measures for these functions.

Further, we discuss ongoing model extensions, especially regarding the integration of biological processes, and possible applications.

How to cite: König, S., Weller, U., Lang, B., Ließ, M., Mayer, S., Stößel, B., Vogel, H.-J., Wiesmeier, M., and Wollschläger, U.: Systemic modelling of soil functions under the impact of agricultural management, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-15243, https://doi.org/10.5194/egusphere-egu2020-15243, 2020

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