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100 1 _ |a Schnepf, Andrea
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111 2 _ |a European Geoscience Union General Assembly 2017
|c Vienna
|d 2017-04-27 - 2017-04-27
|w Austria
245 _ _ |a Comparing root architectural models
260 _ _ |c 2017
336 7 _ |a Conference Paper
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520 _ _ |a Plant roots play an important role in several soil processes (Gregory 2006). Root architecture development deter-mines the sites in soil where roots provide input of carbon and energy and take up water and solutes. However, rootarchitecture is difficult to determine experimentally when grown in opaque soil. Thus, root architectural modelshave been widely used and been further developed into functional-structural models that are able to simulate thefate of water and solutes in the soil-root system (Dunbabin et al. 2013).Still, a systematic comparison of the different root architectural models is missing. In this work, we focuson discrete root architecture models where roots are described by connected line segments. These modelsdiffer (a) in their model concepts, such as the description of distance between branches based on a prescribeddistance (inter-nodal distance) or based on a prescribed time interval. Furthermore, these models differ (b) in theimplementation of the same concept, such as the time step size, the spatial discretization along the root axes or theway stochasticity of parameters such as root growth direction, growth rate, branch spacing, branching angles aretreated.Based on the example of two such different root models, the root growth module of R-SWMS and RootBox, weshow the impact of these differences on simulated root architecture and aggregated information computed fromthis detailed simulation results, taking into account the stochastic nature of those models.ReferencesDunbabin, V.M., Postma, J.A., Schnepf, A., Pagès, L., Javaux, M., Wu, L., Leitner, D., Chen, Y.L., Rengel,Z., Diggle, A.J. Modelling root-soil interactions using three-dimensional models of root growth, architecture andfunction (2013) Plant and Soil, 372 (1-2), pp. 93 – 124.Gregory (2006) Roots, rhizosphere and soil: the route to a better understanding of soil science? European Journalof Soil Science 57: 2-12.
536 _ _ |a 255 - Terrestrial Systems: From Observation to Prediction (POF3-255)
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700 1 _ |a Javaux, Mathieu
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700 1 _ |a Vanderborght, Jan
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