Abstract
Preferential water flow in soil significantly affects runoff, water infiltration, storage, groundwater environment, and soil stability. Plant roots positively affect preferential flow development. This study explored the relationship between the root system of Paulownia fortunei (Seem.) Hemsl. and preferential flow using dyeing tracer test and image analysis techniques. A typical red soil hilly region on the outskirts of Guilin City (Guangxi, China) was selected as the study area. A Bright Blue solution was used to visualize the pathways followed by the infiltrated water in simulated rainfall experiments, and Image Analyzer of Plants was used to analyze the root length, surface area, and volume. The results revealed significant differences in the root surface area density of coarse roots (RSAD-CR) and length index of preferential flow (LI) among soil profiles at various distances from the tree trunk. The root volume density of coarse (RVD-CR) and total roots (RVD-TR), the root length density of coarse roots (RLD-CR), and RSAD-CR were significantly correlated with the characteristics of dyeing morphology. Conversely, the root length density and root surface area density of fine (RLD-FR and RSAD-FR, respectively) and total roots (RLD-TR and RSAD-TR, respectively), and the root volume density of fine roots (RVD-FR) were not significantly correlated with the characteristic parameters of dyeing morphology. The root systems of P. fortunei were critical for enhancing soil water infiltration and developing preferential flow in red soil hilly regions. Coarse roots had a greater impact on the development of preferential flow than fine roots, and root volume had a greater influence on preferential flow development than root length and root surface area. This study contributes to a better understanding of the hydrological cycle at the plant-soil interface in red soil hilly regions.
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Claims 6
Claim · model-written summary
Root volume density and root length density of coarse roots, and root surface area density of coarse roots, correlate significantly with dyeing morphology.
- Taxon
- Paulownia fortunei
Paulownia fortuneit0 - Organ / stage
- coarse rootse1
- Outcome
- dyeing morphologye1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Paulownia fortunei (Seem.) Hemsl.”
e1“The root volume density of coarse (RVD-CR) and total roots (RVD-TR), the root length density of coarse roots (RLD-CR), and RSAD-CR were significantly correlated with the characteristics of dyeing morphology”
Claim · model-written summary
Fine root length, surface area and volume densities and total root length and surface area densities show no significant correlation with dyeing morphology.
- Taxon
- Paulownia fortuneiPaulownia fortuneit0
- Organ / stage
- fine rootse2
- Outcome
- dyeing morphologye2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Paulownia fortunei (Seem.) Hemsl.”
e2“the root length density and root surface area density of fine (RLD-FR and RSAD-FR, respectively) and total roots (RLD-TR and RSAD-TR, respectively), and the root volume density of fine roots (RVD-FR) were not significantly correlated with the characteristic parameters of dyeing morphology”
Claim · model-written summary
Root systems of P. fortunei are critical for enhancing soil water infiltration and developing preferential flow in red soil hilly regions.
- Taxon
- Paulownia fortuneiPaulownia fortuneit0
- Organ / stage
- root systemse3
- Outcome
- soil water infiltratione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Paulownia fortunei (Seem.) Hemsl.”
e3“The root systems of P. fortunei were critical for enhancing soil water infiltration and developing preferential flow in red soil hilly regions”
Claim · model-written summary
Coarse roots have a greater impact on the development of preferential flow than fine roots.
- Taxon
- Paulownia fortuneiPaulownia fortuneit0
- Organ / stage
- Coarse rootse4
- Outcome
- preferential flowe4
- Direction
- greatere4
- Comparator
- fine rootse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Paulownia fortunei (Seem.) Hemsl.”
e4“Coarse roots had a greater impact on the development of preferential flow than fine roots”
Claim · model-written summary
Root volume has a greater influence on preferential flow development than root length and root surface area.
- Taxon
- Paulownia fortuneiPaulownia fortuneit0
- Outcome
- preferential flow developmente5
- Direction
- greatere5
- Comparator
- root length and root surface areae5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Paulownia fortunei (Seem.) Hemsl.”
e5“root volume had a greater influence on preferential flow development than root length and root surface area”
Claim · model-written summary
Root surface area density of coarse roots differed significantly among soil profiles at various distances from the trunk.
- Taxon
- Paulownia fortuneiPaulownia fortuneit0
- Organ / stage
- coarse rootse6
- Outcome
- root surface area densitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Paulownia fortunei (Seem.) Hemsl.”
e6“The results revealed significant differences in the root surface area density of coarse roots (RSAD-CR) and length index of preferential flow (LI) among soil profiles at various distances from the tree trunk”