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| Theory and application of diffusive gradients in thin-films(DGT) in the environment Ⅲ: Theoretical basis and application potential in phytoavailability assessment |
| Received:March 14, 2018 |
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| KeyWord:phytoavailability;diffusive gradients in thin-films (DGT);DIFS modelling;resupply kinetics;plant uptake |
| Author Name | Affiliation | E-mail | | WEI Tian-jiao | State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China | | | GUAN Dong-xing | State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China | | | FANG Wen | State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China | | | LUO Jun | State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China | esluojun@nju.edu.cn |
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| Abstract: |
| Diffusive gradients in thin-films(DGT) is an in situ method assessing phytoavailability of metal(liod)s and phosphorus. A good correlation between concentrations of metal(liod)s and phosphorus in plants and their measurement by DGT in soils has been observed in plenty of studies, as DGT mimics the diffusion limiting uptake conditions that characterise the uptake of these solutes by many plants. In this paper, we elaborated what DGT measures in a particular environment based on an understanding of the dynamics processes. Mechanisms of metal(liod)s and phosphorus phytoavailability and how they relate to diffusive fluxes measured by DGT were discussed. Publications reporting relationships between concentrations of elements in plants and soil measurements, including DGT, was summarized. In the end, an outlook on DGT application potential in predicting element phytoavailability was made. |
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