Roots at the percolation threshold.
Roots at the percolation threshold.
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根系处于渗滤阈值
DOI:
10.1103/physreve.91.042706
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Carminati A
中科院分区:
文献类型:
--
作者:
Kroener E;Ahmed MA;Carminati A
The rhizosphere is the layer of soil around the roots where complex and dynamic interactions between plants and soil affect the capacity of plants to take up water. The physical properties of the rhizosphere are affected by mucilage, a gel exuded by roots. Mucilage can absorb large volumes of water, but it becomes hydrophobic after drying. We use a percolation model to describe the rewetting of dry rhizosphere. We find that at a critical mucilage concentration the rhizosphere becomes impermeable. The critical mucilage concentration depends on the radius of the soil particle size. Capillary rise experiments with neutron radiography prove that for concentrations below the critical mucilage concentration water could easily cross the rhizosphere, while above the critical concentration water could no longer percolate through it. Our studies, together with former observations of water dynamics in the rhizosphere, suggest that the rhizosphere is near the percolation threshold, where small variations in mucilage concentration sensitively alter the soil hydraulic conductivity. Is mucilage exudation a plant mechanism to efficiently control the rhizosphere conductivity and the access to water?
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DOI:
10.1103/physreve.76.026311
发表时间:
2007
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
Andrea Carminati;A. Kaestner;Hannes Flühler;P. Lehmann;Dani Or;Eberhard Lehmann;M. Stampanoni
通讯作者:
M. Stampanoni
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
T. Steenhuis;A. Hunt;J. Parlange;R. Ewing
通讯作者:
R. Ewing
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
E. Gado;L. Arcangelis;A. Coniglio
通讯作者:
A. Coniglio
影响因子:
5.6
作者:
Carminati A
通讯作者:
Carminati A
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
H. Pleinert;E. Lehmann
通讯作者:
E. Lehmann