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000829735 1001_ $$0P:(DE-Juel1)157922$$aSchnepf, Andrea$$b0$$eCorresponding author$$ufzj
000829735 1112_ $$aEuropean Geoscience Union General Assembly 2017$$cVienna$$d2017-04-27 - 2017-04-27$$wAustria
000829735 245__ $$aComparing root architectural models
000829735 260__ $$c2017
000829735 3367_ $$033$$2EndNote$$aConference Paper
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000829735 520__ $$aPlant roots play an important role in several soil processes (Gregory 2006). Root architecture development deter-mines the sites in soil where roots provide input of carbon and energy and take up water and solutes. However, rootarchitecture is difficult to determine experimentally when grown in opaque soil. Thus, root architectural modelshave been widely used and been further developed into functional-structural models that are able to simulate thefate of water and solutes in the soil-root system (Dunbabin et al. 2013).Still,  a  systematic  comparison  of  the  different  root  architectural  models  is  missing.  In  this  work,  we  focuson  discrete  root  architecture  models  where  roots  are  described  by  connected  line  segments.  These  modelsdiffer (a) in their model concepts, such as the description of distance between branches based on a prescribeddistance (inter-nodal distance) or based on a prescribed time interval. Furthermore, these models differ (b) in theimplementation of the same concept, such as the time step size, the spatial discretization along the root axes or theway stochasticity of parameters such as root growth direction, growth rate, branch spacing, branching angles aretreated.Based on the example of two such different root models, the root growth module of R-SWMS and RootBox, weshow the impact of these differences on simulated root architecture and aggregated information computed fromthis detailed simulation results, taking into account the stochastic nature of those models.ReferencesDunbabin,  V.M.,  Postma,  J.A.,  Schnepf,  A.,  Pagès,  L.,  Javaux,  M.,  Wu,  L.,  Leitner,  D.,  Chen,  Y.L.,  Rengel,Z., Diggle, A.J. Modelling root-soil interactions using three-dimensional models of root growth, architecture andfunction (2013) Plant and Soil, 372 (1-2), pp. 93 – 124.Gregory (2006) Roots, rhizosphere and soil: the route to a better understanding of soil science? European Journalof Soil Science 57: 2-12.
000829735 536__ $$0G:(DE-HGF)POF3-255$$a255 - Terrestrial Systems: From Observation to Prediction (POF3-255)$$cPOF3-255$$fPOF III$$x0
000829735 7001_ $$0P:(DE-Juel1)129477$$aJavaux, Mathieu$$b1$$ufzj
000829735 7001_ $$0P:(DE-Juel1)129548$$aVanderborght, Jan$$b2$$ufzj
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000829735 9141_ $$y2017
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