Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes
This study tested a method to quantify and locate hydraulic lift (HL, defined as the passive upward water flow from wetter to dryer soil zones through the plant root system) by combining an experiment using the stable water isotope HO as a tracer with a soil–plant water flow model. Our methodology c...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-02-01
|
| Series: | Vadose Zone Journal |
| Online Access: | https://dl.sciencesocieties.org/publications/vzj/articles/17/1/160134 |
| _version_ | 1819095287440867328 |
|---|---|
| author | Félicien Meunier Youri Rothfuss Thierry Bariac Philippe Biron Patricia Richard Jean-Louis Durand Valentin Couvreur Jan Vanderborght Mathieu Javaux |
| author_facet | Félicien Meunier Youri Rothfuss Thierry Bariac Philippe Biron Patricia Richard Jean-Louis Durand Valentin Couvreur Jan Vanderborght Mathieu Javaux |
| author_sort | Félicien Meunier |
| collection | DOAJ |
| description | This study tested a method to quantify and locate hydraulic lift (HL, defined as the passive upward water flow from wetter to dryer soil zones through the plant root system) by combining an experiment using the stable water isotope HO as a tracer with a soil–plant water flow model. Our methodology consisted in (i) establishing the initial conditions for HL in a large rhizobox planted with Italian ryegrass ( Lam.), (ii) labeling water in the deepest soil layer with an O-enriched solution, (iii) monitoring the water O isotopic composition in soil layers to find out changes in the upper layers that would reflect redistribution of O-enriched water from the bottom layers by the roots, and (iv) comparing the observed soil water O isotopic composition to simulation results of a three-dimensional model of water flow and isotope transport in the soil–root system. Our main findings were that (i) the depth and strength of the observed changes in soil water O isotopic composition could be well reproduced with a modeling approach (RMSE = 0.2‰, i.e., equivalent to the precision of the isotopic measurements), (ii) the corresponding water volume involved in HL was estimated to account for 19% of the plant transpiration of the following day, i.e., 0.45 mm of water, and was in agreement with the observed soil water content changes, and (iii) the magnitude of the simulated HL was sensitive to both plant and soil hydraulic properties. |
| first_indexed | 2024-12-21T23:40:54Z |
| format | Article |
| id | doaj.art-b3521f8a7ba4430ab346a354b1b02320 |
| institution | Directory Open Access Journal |
| issn | 1539-1663 |
| language | English |
| last_indexed | 2024-12-21T23:40:54Z |
| publishDate | 2018-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Vadose Zone Journal |
| spelling | doaj.art-b3521f8a7ba4430ab346a354b1b023202022-12-21T18:46:14ZengWileyVadose Zone Journal1539-16632018-02-0117110.2136/vzj2016.12.0134Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water IsotopesFélicien MeunierYouri RothfussThierry BariacPhilippe BironPatricia RichardJean-Louis DurandValentin CouvreurJan VanderborghtMathieu JavauxThis study tested a method to quantify and locate hydraulic lift (HL, defined as the passive upward water flow from wetter to dryer soil zones through the plant root system) by combining an experiment using the stable water isotope HO as a tracer with a soil–plant water flow model. Our methodology consisted in (i) establishing the initial conditions for HL in a large rhizobox planted with Italian ryegrass ( Lam.), (ii) labeling water in the deepest soil layer with an O-enriched solution, (iii) monitoring the water O isotopic composition in soil layers to find out changes in the upper layers that would reflect redistribution of O-enriched water from the bottom layers by the roots, and (iv) comparing the observed soil water O isotopic composition to simulation results of a three-dimensional model of water flow and isotope transport in the soil–root system. Our main findings were that (i) the depth and strength of the observed changes in soil water O isotopic composition could be well reproduced with a modeling approach (RMSE = 0.2‰, i.e., equivalent to the precision of the isotopic measurements), (ii) the corresponding water volume involved in HL was estimated to account for 19% of the plant transpiration of the following day, i.e., 0.45 mm of water, and was in agreement with the observed soil water content changes, and (iii) the magnitude of the simulated HL was sensitive to both plant and soil hydraulic properties.https://dl.sciencesocieties.org/publications/vzj/articles/17/1/160134 |
| spellingShingle | Félicien Meunier Youri Rothfuss Thierry Bariac Philippe Biron Patricia Richard Jean-Louis Durand Valentin Couvreur Jan Vanderborght Mathieu Javaux Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes Vadose Zone Journal |
| title | Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes |
| title_full | Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes |
| title_fullStr | Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes |
| title_full_unstemmed | Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes |
| title_short | Measuring and Modeling Hydraulic Lift of Lolium multiflorum Using Stable Water Isotopes |
| title_sort | measuring and modeling hydraulic lift of lolium multiflorum using stable water isotopes |
| url | https://dl.sciencesocieties.org/publications/vzj/articles/17/1/160134 |
| work_keys_str_mv | AT felicienmeunier measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT yourirothfuss measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT thierrybariac measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT philippebiron measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT patriciarichard measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT jeanlouisdurand measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT valentincouvreur measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT janvanderborght measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes AT mathieujavaux measuringandmodelinghydraulicliftofloliummultiflorumusingstablewaterisotopes |