Accounting for Solution Composition in a Plant Roots Active Nutrient Uptake Model

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Abstract

The objective of this study was to include the nutrient uptake deficiency stress in the generic multicomponent transport model, HP1 (the geochemical code PHREEQC coupled to the transient water and solute transport model HYDRUS-1D). The first step was the incorporation of a combined passive- active root nutrient uptake model in HP1 (Jacques et al., 2006). The nutrient uptake model is based on the model of Silberbush et al. (2005). For example, Ca is taken up by passive and active processes, in which the parameters of the Michaelis-Menten active uptake model depend on the solution chemistry. Simulations were compared with experimental data from four irrigation treatments with different Na(-Cl) concentrations. The results are a preliminary attempt to predict uptake of different ions under varying conditions of salinity. Results for Na and K are promising.

Details

Original languageEnglish
Title of host publicationProceedings of the 4 International Conference HYDRUS Software Applications to Subsurface Flow and Contaminant Transport Problems
Place of PublicationPrague, Czech Republic
Pages299-306
Publication statusPublished - Jul 2013
Event4th International Conference HYDRUS Software Applications to Subsurface Flow and Contaminant Transport Problems - Czech University of Life Sciences, Prague, Czech Republic
Duration: 21 Mar 201322 Mar 2013

Conference

Conference4th International Conference HYDRUS Software Applications to Subsurface Flow and Contaminant Transport Problems
Country/TerritoryCzech Republic
CityPrague
Period2013-03-212013-03-22

Keywords

  • PHREEQC, HYDRUS-1D, HP1, nutrient uptake model

ID: 315183