New Tool RhizoMath for Modeling Coupled Transport and Speciation in the Rhizosphere
| Autor: | Reinhold Jahn, Heino Nietfeld, Krisztian Szegedi, Heinz-Ulrich Neue, Doris Vetterlein |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
0106 biological sciences
Rhizosphere Engineering Source code business.industry media_common.quotation_subject Arsenate Bulk soil Surface binding Soil Science 04 agricultural and veterinary sciences 01 natural sciences chemistry.chemical_compound chemistry Environmental chemistry Genetic algorithm 040103 agronomy & agriculture 0401 agriculture forestry and fisheries business Biological system MATLAB computer 010606 plant biology & botany media_common computer.programming_language |
| Zdroj: | Vadose Zone Journal. 7:712-720 |
| ISSN: | 1539-1663 |
| DOI: | 10.2136/vzj2007.0064 |
| Popis: | The transfer of nutrients and contaminants from bulk soil to roots and into plants depends on many plant and soil pro- cesses. The RhizoMath approach for modeling co-occurring processes in the rhizosphere, including speciaƟ on in the soil soluƟ on, is based on coupling the mathemaƟ cal package MATLAB with the geochemical code PHREEQC. In addiƟ on to the built-in iniƟ alizaƟ on module that performs calibraƟ on against experimental data, RhizoMath's greatest advantage is that diff erent geochemical models (with and without charge balance) and geometries (planar and radial) are already included. Moreover, due to its graphical user interface, the tool can be applied without changing the source code or a complex input fi le. The model was verifi ed using a benchmark and experimental data: (i) the iniƟ alizaƟ on module was successfully applied to describe concentraƟ ons measured in soil soluƟ on samples; (ii) the theoreƟ cal problem "diff usion of K toward a single root" was used to demonstrate that the performance of applied numerical methods is comparable to other approaches; and (iii) for compartment system experiments involving more complex speciaƟ on, RhizoMath was able to describe the observed eff ects of citrate exudates on the simultaneous transport of arsenate and phosphate that compete for surface binding sites with each other and with other oxyanions such as citrate. |
| Databáze: | OpenAIRE |
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