PuSH - Publikationsserver des Helmholtz Zentrums München

Janott, M. ; Gayler, S. ; Gessler, A.* ; Javaux, M.* ; Klier, C. ; Priesack, E.

A one-dimensional model of water flow in soil-plant systems based on plant architecture.

Plant Soil 341, 233-256 (2011)
DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
The estimation of root water uptake and water flow in plants is crucial to quantify transpiration and hence the water exchange between land surface and atmosphere. In particular the soil water extraction by plant roots which provides the water supply of plants is a highly dynamic and non-linear process interacting with soil transport processes that are mainly determined by the natural soil variability at different scales. To better consider this root-soil interaction we extended and further developed a finite element tree hydro-dynamics model based on the one-dimensional (1D) porous media equation. This is achieved by including in addition to the explicit three-dimensional (3D) architectural representation of the tree crown a corresponding 3D characterisation of the root system. This 1D xylem water flow model was then coupled to a soil water flow model derived also from the 1D porous media equation. We apply the new model to conduct sensitivity analysis of root water uptake and transpiration dynamics and compare the results to simulation results obtained by using a 3D model of soil water flow and root water uptake. Based on data from lysimeter experiments with young European beech trees (Fagus silvatica L.) is shown, that the model is able to correctly describe transpiration and soil water flow. In conclusion, compared to a fully 3D model the 1D porous media approach provides a computationally efficient alternative, able to reproduce the main mechanisms of plant hydro-dynamics including root water uptake from soil.
Altmetric
Weitere Metriken?
[➜Einloggen]
Zusatzinfos bearbeiten [➜Einloggen]
Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Transpiration; Plant hydro-dynamics model; Root water uptake; European beech; Porous media equation
ISSN (print) / ISBN 0032-079X
e-ISSN 1573-5036
Zeitschrift Plant and Soil
Quellenangaben Band: 341, Heft: 1-2, Seiten: 233-256 Artikelnummer: , Supplement: ,
Verlag Springer
Verlagsort Dordrecht, Netherlands
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Soil Ecology (IBOE)
Institute of Groundwater Ecology (IGOE)