Share This Article:

Soil reinforcement by a root system and its effects on sediment yield in response to concentrated flow in the loess plateau

Abstract Full-Text HTML Download Download as PDF (Size:133KB) PP. 86-93
DOI: 10.4236/as.2011.22013    8,747 Downloads   12,899 Views   Citations
Author(s)    Leave a comment

ABSTRACT

The importance of roots in soil conservation has long been underestimated due to a lack of sys-tematic studies conducted to evaluate root dis-tribution patterns and their effects on soil ero-sion. Current knowledge regarding root mor-phology and its impact on soil erosion by water is limited; therefore, detailed analysis of the role that root systems play in controlling soil ero-sion is needed. In this study, stratified runoff scouring at different soil depths in the field was conducted in a grassland area. The results in-dicated that both root biomass and soil wa-ter-stable aggregates decreased as soil depth increased at all three sites, while there was al-most no change in soil bulk density at 1.3g/cm3. Sediment yields under different runoff dis-charge at different sites showed similar trends, and the sediment yield increased as the soil depth increased at all three sites. Further analysis revealed that close relationships ex-isted between root biomass and the amount of water-stable aggregates and soil organic matter content, and that these factors greatly influ-enced soil erosion. Based on the data generated by the experiment, equations describing the relationship between sediment production at different soil depths and root biomass were determined.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Li, P. and Li, Z. (2011) Soil reinforcement by a root system and its effects on sediment yield in response to concentrated flow in the loess plateau. Agricultural Sciences, 2, 86-93. doi: 10.4236/as.2011.22013.

References

[1] Zhou Peihua, Wu Chunlong. (1993) Researches on the methods of soil anti-scourability on Loess Plateau. Journal of Soil and Water Conservation (in Chinese). 7(1): 29-34
[2] Gyssels G., Poesen J.. (2003) The importance of plant root characteristics in controlling concentrated flow erosion rates. Earth Surface Processes and Landforms, 28, 371-384
[3] Ghidey F, Alberts EE. (1997) Plant root effects on soil erodibility, splash detachment, soil strength, and aggregate stability. Transactions of the American Soci-ety of Agricultural Engineers, 40(1): 129-135.
[4] Li Yong, Zhu Xian-Mo, Tian Ji-Ying. (1991) Effectiveness of plant roots to increase the anti-scourability of soil on the Loess Plateau. Chinese Science Bulletin, 36(24): 2077-2082.
[5] Morgan RPC. (1995) Soil Erosion and Conservation (second edition). Longman Group: Har-low.
[6] Carroll C., Merton L., Burger P. (2000) Impact of vegetation cover and slope on runoff, erosion, and water quality for field plots on a range of soil and spoil materials on central Queenlands coal mines. Australian Journal of Soil Research, 38: 313~327
[7] Hoffmann L, Ries RE. (1991) Relationship of soil and plant characters to erosion and runoff on pasture and range. Journal of soil and water conservation, 2: 143-147
[8] Loch RJ. (2000) Effects of vegetation cover on runoff and erosion under simulation rain and overland flow on a rehabilitated site on the Meandu Mine, Tarong, Queenlandd. Australian Journal of Soil Re-search, 38: 299-312
[9] Peng Li, Zhanbin Li, Liangyong Zheng. (2002) Advances in researches of the effectiveness for vegetation conserving soil and water. Research of Soil and Water Conservation (in Chinese), 9(1): 76-80
[10] Thornes JB. (1987) The palaeoecology of ero-sion. In Landscapes and Culture, Wagstaff JM (ed.). Basic Blackwell: Oxford; 37-55.
[11] Morgan RPC, Rickson RJ. (1995) Slope Stabilization and Erosion Control: a Bioengi-neering Approach. Chapman & Hall: London.
[12] Jansen RC, Coelho Netto AL. (1999) Root systems distribution and functions in a mountainous tropical rainforest environment. Geomorphic Responses to Vegetation Changes: Problems and Remedial Work. Proceedings of the International Geo-graphical Union, Copyright 2003 John Wiley & Sons, Ltd. Earth Surf. Process. Landforms 28, 371-384
[13] Green-way DR. (1987) Vegetation and slope stability. In Slope Stability, Anderson MG, Richards KS (eds). John Wiley & Sons: Chichester; 187-230.
[14] Waldron LJ, Dakessian S. (1981) Soil reinforcement by roots: calculation of increased soil shear resistance from root properties. Soil Science 132: 427-435.
[15] Tengbeh GT. (1993) The effect of grass roots on shear strength variations with moisture content. Soil Technology, 6: 387-295.
[16] Abe K, Ziemer RR. (1991) Effect of tree roots on shallow-seated landslides. USDA Forest Service General Technical Report 22(2): 95-108.
[17] Reid BJ, Goss MJ. (1987) Effect of living roots of different plant species on the aggregate stability of two arable soils. Journal of Soil Science, 32: 521-541.
[18] Cresswell HP, Kirkegaard JA. (1995) Sub-soil amelioration by plant roots----the process and evident. Australian Journal of Soil Research, 33:221-239
[19] Hartman R, De Boodt M. (1974) The in-fluence of the moisture content, texture and organic-matter on the aggregation of sandy and loamy soils. Geoderma 11(1): 53-62.
[20] Jiang Dingsheng, Fan Xingke, Li Xin-hua. (1995) Researches on vertical and horizontal patterns of soil anti-scourablity on Loess Plateau. Journal of Soil and Water Conservation, 9(2): 1-8.

  
comments powered by Disqus

Copyright © 2019 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.