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Roots-Enhanced Preferential Flows in Deciduous and Coniferous Forest Soils Revealed by Dual-Tracer Experiments

Luo, Ziteng ; Niu, Jianzhi ; Zhang, Linus LU orcid ; Chen, Xiongwen ; Zhang, Wei ; Xie, Baoyuan ; Du, Jie ; Zhu, Zhijun ; Wu, Shanshan and Li, Xiang (2019) In Journal of Environmental Quality 48(1). p.136-146
Abstract

Macropores formed by roots are crucial channels for preferential flows in forest soils that are largely responsible for water percolation and solute leaching. Using dual-tracer experiments (Brilliant Blue FCF and bromide [Br]), this study investigated the preferential flows of water and solutes in a deciduous forest dominated by Bl. and a coniferous forest mainly planted with (L.) Franco. Dye-stained patterns and concentrations of Brilliant Blue and Br were obtained in vertical soil profiles (0-30 cm), whereas stained and unstained roots were collected and analyzed in horizontal soil profiles to a 30-cm soil depth. Brilliant Blue and Br were mainly accumulated in the 0- to 20-cm soil depth, which had greater total root length density... (More)

Macropores formed by roots are crucial channels for preferential flows in forest soils that are largely responsible for water percolation and solute leaching. Using dual-tracer experiments (Brilliant Blue FCF and bromide [Br]), this study investigated the preferential flows of water and solutes in a deciduous forest dominated by Bl. and a coniferous forest mainly planted with (L.) Franco. Dye-stained patterns and concentrations of Brilliant Blue and Br were obtained in vertical soil profiles (0-30 cm), whereas stained and unstained roots were collected and analyzed in horizontal soil profiles to a 30-cm soil depth. Brilliant Blue and Br were mainly accumulated in the 0- to 20-cm soil depth, which had greater total root length density than the 20- to 30-cm soil depth ( < 0.05). Only part of the roots facilitated the preferential flows, with finer roots (i.e., diameter <1 mm) contributing the most. More intriguingly, the coniferous forest soil had a greater degree of preferential flows and greater tracer concentrations at deeper soil depth than the deciduous forest soil, suggesting the importance of tree species and forest composition on water and solute transport in forest ecosystems.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Environmental Quality
volume
48
issue
1
pages
11 pages
publisher
American Society of Agronomy
external identifiers
  • scopus:85059912276
  • pmid:30640350
ISSN
0047-2425
DOI
10.2134/jeq2018.03.0091
language
English
LU publication?
yes
id
15fcb15a-f464-429f-9689-d8a24a8000d9
date added to LUP
2019-02-01 12:11:20
date last changed
2024-04-15 23:16:10
@article{15fcb15a-f464-429f-9689-d8a24a8000d9,
  abstract     = {{<p>Macropores formed by roots are crucial channels for preferential flows in forest soils that are largely responsible for water percolation and solute leaching. Using dual-tracer experiments (Brilliant Blue FCF and bromide [Br]), this study investigated the preferential flows of water and solutes in a deciduous forest dominated by Bl. and a coniferous forest mainly planted with (L.) Franco. Dye-stained patterns and concentrations of Brilliant Blue and Br were obtained in vertical soil profiles (0-30 cm), whereas stained and unstained roots were collected and analyzed in horizontal soil profiles to a 30-cm soil depth. Brilliant Blue and Br were mainly accumulated in the 0- to 20-cm soil depth, which had greater total root length density than the 20- to 30-cm soil depth ( &lt; 0.05). Only part of the roots facilitated the preferential flows, with finer roots (i.e., diameter &lt;1 mm) contributing the most. More intriguingly, the coniferous forest soil had a greater degree of preferential flows and greater tracer concentrations at deeper soil depth than the deciduous forest soil, suggesting the importance of tree species and forest composition on water and solute transport in forest ecosystems.</p>}},
  author       = {{Luo, Ziteng and Niu, Jianzhi and Zhang, Linus and Chen, Xiongwen and Zhang, Wei and Xie, Baoyuan and Du, Jie and Zhu, Zhijun and Wu, Shanshan and Li, Xiang}},
  issn         = {{0047-2425}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  pages        = {{136--146}},
  publisher    = {{American Society of Agronomy}},
  series       = {{Journal of Environmental Quality}},
  title        = {{Roots-Enhanced Preferential Flows in Deciduous and Coniferous Forest Soils Revealed by Dual-Tracer Experiments}},
  url          = {{http://dx.doi.org/10.2134/jeq2018.03.0091}},
  doi          = {{10.2134/jeq2018.03.0091}},
  volume       = {{48}},
  year         = {{2019}},
}