Multiple Scale Homogenisation of Nutrient Movement and Crop Growth in Partially Saturated Soil

Duncan, S. J.; Daly, Keith R.; Fletcher, Daniel McKay; Ruiz, Siul; Sweeney, Paul; Roose, Tiina

doi:10.1007/s11538-019-00656-3

Cited by 2 publications

(2 citation statements)

References 47 publications

(53 reference statements)

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“…Although their model accounts for advective solute uptake with the transpiration stream and solute translocation to the shoot, it does not consider diffusive uptake across the root membrane nor does it simulate 3D explicit root architecture and water flow from the soil to the root system and within the root system. Duncan et al ( 2019 ) developed a mathematical model that accounts for the impact of water and solute uptake on tuber growth. However, 3D root architecture is also not considered.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic modeling of pesticide uptake with a 3D plant architecture model

Jorda

Huber

Kunkel

et al. 2021

Environ Sci Pollut Res

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Meaningful assessment of pesticide fate in soils and plants is based on fate models that represent all relevant processes. With mechanistic models, these processes can be simulated based on soil, substance, and plant properties. We present a mechanistic model that simulates pesticide uptake from soil and investigate how it is influenced, depending on the governing uptake process, by root and substance properties and by distributions of the substance and water in the soil profile. A new root solute uptake model based on a lumped version of the Trapp model (Trapp, 2000) was implemented in a coupled version of R-SWMS-ParTrace models for 3-D water flow and solute transport in soil and root systems. Solute uptake was modeled as two individual processes: advection with the transpiration stream and diffusion through the root membrane. We set up the model for a FOCUS scenario used in the European Union (EU) for pesticide registration. Considering a single vertical root and advective uptake only, the root hydraulic properties could be defined so that water and substance uptake and substance fate in soil showed a good agreement with the results of the 1D PEARL model, one of the reference models used in the EU for pesticide registration. Simulations with a complex root system and using root hydraulic parameters reported in the literature predicted larger water uptake from the upper root zone, leading to larger pesticide uptake when pesticides are concentrated in the upper root zone. Dilution of root water concentrations at the top root zone with water with low pesticide concentration taken up from the bottom of the root zone leads to larger uptake of solute when uptake was simulated as a diffusive process. This illustrates the importance of modeling uptake mechanistically and considering root and solute physical and chemical properties, especially when root-zone pesticide concentrations are non-uniform.

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Section: Introductionmentioning

confidence: 99%

Mechanistic modeling of pesticide uptake with a 3D plant architecture model

Jorda

Huber

Kunkel

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Although their model accounts for advective solute uptake with the transpiration stream and solute translocation to the shoot, it does not consider diffusive uptake across the root membrane nor does it simulate 3D explicit root architecture and water flow from the soil to the root system and within the root system. Duncan et al (2019) developed a mathematical model that accounts for the impact of water and solute uptake on tuber growth.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic modeling of pesticide uptake with a 3D plant architecture model

Jorda

Huber

Kunkel

et al. 2021

Preprint

View full text Add to dashboard Cite

A new root solute uptake model based on a lumped version of the Trapp model (Trapp, 2000) was implemented in a coupled version of R-SWMS-ParTrace models for 3-D water flow and solute transport in soil and roots. Solute uptake was modeled as two individual processes: advection with the transpiration stream and diffusion through the root membrane. We parameterized the model for a FOCUS scenario used in the European Union for pesticide registration. Simulation with a single root showed a good agreement with the results produced by the 1D PEARL model. Simulations with a complex root system predicted larger water uptake from the upper root zone, leading to larger pesticide uptake when pesticides are concentrated in the upper root zone. Dilution of root water concentrations at the top root zone with water with low pesticide concentration taken up from the bottom of the root zone lead to larger uptake of solute when uptake was simulated as a diffusive process. This illustrates the importance of modeling uptake mechanistically and considering root and solute physical and chemical properties, especially when root-zone pesticide concentrations are non uniform.

show abstract

Multiple Scale Homogenisation of Nutrient Movement and Crop Growth in Partially Saturated Soil

Cited by 2 publications

References 47 publications

Mechanistic modeling of pesticide uptake with a 3D plant architecture model

Mechanistic modeling of pesticide uptake with a 3D plant architecture model

Mechanistic modeling of pesticide uptake with a 3D plant architecture model

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