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How do root and soil characteristics affect the erosion-reducing potential of plant species?
Vannoppen, W.1; De Baets, S.2; Keeble, J.1; Dong, Y.3; Poesen, J.1
2017-12-01
Source PublicationECOLOGICAL ENGINEERING
ISSN0925-8574
Volume109Pages:186-195
SubtypeArticle
AbstractPlant roots can be very effective in stabilizing the soil against concentrated flow erosion. So far, most research on the erosion-reducing potential of plant roots was conducted on loamy soils. However susceptible to incisive erosion processes, at present, no research exists on the effectiveness of plant roots in reducing concentrated flow erosion rates in sandy soils. Therefore, the prime objective of this study was to assess the erosion-reducing potential of both fibrous and tap roots in sandy soils. Furthermore, we investigated potential effects of root diameter, soil texture and dry soil bulk density on the erosion-reducing potential of plant roots. Therefore, flume experiments conducted on sandy soils (this study) were compared with those on sandy loam and silt loam soils (using the same experimental set up). Results showed that plant roots were very efficient in reducing concentrated flow erosion rates in sandy soils compared to root-free bare soils. Furthermore, our results confirmed that fibrous roots were more effective compared to (thick) tap roots. Dry soil bulk density and soil texture also played a significant role. As they were both related to soil cohesion, the results of this study suggested that the effectiveness of plant roots in controlling concentrated flow erosion rates depended on the apparent soil cohesion. The nature of this soil type effect depended on the root-system type: fine root systems were most effective in non-cohesive soils while tap root systems were most effective in cohesive soils. For soils permeated with a given amount of fibrous roots, an increase of soil bulk density seemed to hamper the effectiveness of roots to further increase soil cohesion and reduce erosion rates. In soils reinforced by tap root systems, the erosion-reducing power of the roots depended on sand content: the higher the percentage of sand, the smaller the erosion-reducing effect for a given amount of roots. This was attributed to more pronounced vortex erosion around the thicker tap roots in non-cohesive soils, increasing soil erosion rates. The results presented in this study could support practitioners to assess the likely erosion-reducing effects of plant root systems based on both root and soil characteristics.
KeywordConcentrated Flow Erosion Fibrous Root System Tap Root System Soil Texture Root Density Root Length Density
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Technology
DOI10.1016/j.ecoleng.2017.08.001
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Engineering
Indexed BySCI ; ISTP
WOS KeywordCONCENTRATED FLOW EROSION ; 3 GORGES RESERVOIR ; LOESS PLATEAU ; BULK-DENSITY ; OVERLAND-FLOW ; DETACHMENT CAPACITY ; ECOSYSTEM PROCESSES ; TEMPORAL VARIATION ; MOISTURE-CONTENT ; SLOPE STABILITY
Language英语
WOS SubjectEcology ; Engineering, Environmental ; Environmental Sciences
WOS IDWOS:000419678000005
Funding OrganizationKU Leuven ; National Natural Science Foundation of China(41671288) ; China Scholarship Council
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20859
Collection山地灾害与地表过程重点实验室
Corresponding AuthorVannoppen, W.
Affiliation1.Katholieke Univ Leuven, Div Geog & Tourism, Celestijnenlaan 200E, B-3001 Heverlee, Belgium
2.Univ Cranfield, Sch Water Energy & Environm, Bldg B 52A, Cranfield, Beds, England
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Vannoppen, W.,De Baets, S.,Keeble, J.,et al. How do root and soil characteristics affect the erosion-reducing potential of plant species?[J]. ECOLOGICAL ENGINEERING,2017,109:186-195.
APA Vannoppen, W.,De Baets, S.,Keeble, J.,Dong, Y.,&Poesen, J..(2017).How do root and soil characteristics affect the erosion-reducing potential of plant species?.ECOLOGICAL ENGINEERING,109,186-195.
MLA Vannoppen, W.,et al."How do root and soil characteristics affect the erosion-reducing potential of plant species?".ECOLOGICAL ENGINEERING 109(2017):186-195.
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