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DOI | 10.1002/2017WR020832 |
Quantitative mapping of solute accumulation in a soil-root system by magnetic resonance imaging | |
Haber-Pohlmeier, S.1; Vanderborght, J.2; Pohlmeier, A.2 | |
2017-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Differential uptake of water and solutes by plant roots generates heterogeneous concentration distributions in soils. Noninvasive observations of root system architecture and concentration patterns therefore provide information about root water and solute uptake. We present the application of magnetic resonance imaging (MRI) to image and monitor root architecture and the distribution of a tracer, GdDTPA(2-) (Gadolinium-diethylenetriaminepentacetate) noninvasively during an infiltration experiment in a soil column planted with white lupin. We show that inversion recovery preparation within the MRI imaging sequence can quantitatively map concentrations of a tracer in a complex root-soil system. Instead of a simple T-1 weighting, the procedure is extended by a wide range of inversion times to precisely map T1 and subsequently to cover a much broader concentration range of the solute. The derived concentrations patterns were consistent with mass balances and showed that the GdDTPA(2-) tracer represents a solute that is excluded by roots. Monitoring and imaging the accumulation of the tracer in the root zone therefore offers the potential to determine where and by which roots water is taken up. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411202000059 |
WOS关键词 | POROUS-MEDIA ; WATER-UPTAKE ; MOISTURE VARIABILITY ; NEUTRON-RADIOGRAPHY ; TRACER TRANSPORT ; FLOW ; QUANTIFICATION ; RHIZOSPHERE ; DYNAMICS ; VISUALIZATION |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20456 |
专题 | 资源环境科学 |
作者单位 | 1.Rhein Westfal TH Aachen, Inst Tech & Macromol Chem, Aachen, Germany; 2.Forschungszentrum Julich, IBG 3, Agrosphere, Julich, Germany |
推荐引用方式 GB/T 7714 | Haber-Pohlmeier, S.,Vanderborght, J.,Pohlmeier, A.. Quantitative mapping of solute accumulation in a soil-root system by magnetic resonance imaging[J]. WATER RESOURCES RESEARCH,2017,53(8). |
APA | Haber-Pohlmeier, S.,Vanderborght, J.,&Pohlmeier, A..(2017).Quantitative mapping of solute accumulation in a soil-root system by magnetic resonance imaging.WATER RESOURCES RESEARCH,53(8). |
MLA | Haber-Pohlmeier, S.,et al."Quantitative mapping of solute accumulation in a soil-root system by magnetic resonance imaging".WATER RESOURCES RESEARCH 53.8(2017). |
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