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中亚热带优势灌木根系对土壤抗剪切力的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2011年02期
Page:
47-50
Column:
研究论文
publishdate:
2011-03-28

Article Info:/Info

Title:
Effects of the root systems of dominant shrub species in midsubtropical forest on soil antishearing strength enhancement
Author(s):
WANG Jianmin1 SHEN Lieying2 ZHAO Guangqi2*
1.Shanghai Binjiang Forest Park, Shanghai 200137,China;2.Shanghai Research Institute of Landscape Gardening, Shanghai 200232,China
Keywords:
root systems of shrub species root shear strength root tensile strengthmidsubtropical forest
Classification number :
S7157
DOI:
10.3969/j.jssn.1000-2006.2011.02.010
Document Code:
A
Abstract:
The mechanical stabilization of soil slopes by means of plant roots depends largely on the strength properties of the roots and their growth pattern within the soil.In particular area, the selection of indigenous plant species on the basis of their root properties is an essential part of biotechnical slope protection. In order to examine the effects of shrub roots on slope stabilization in the geological hazards of landslide/debris flow, the mountainous region in Qinyuan county, south of Zhejiang, three species (Loropetalum chinense, Rhododendron latoucheae, Dalbergia millettii) were studied, which were dominant shrubs in midsubtropical evergreen broadleaved forest. The results showed that plant roots had positive effects on shear strength of topsoil (≤15mm), and have obvious different in both tensile stress and tensile strength. In the topsoil, the shrub L. chinense and R. latoucheae have more fibrous root than that of D. millettii, in quantity, so that D. millettii provided the minimum value of shear strength. The values of root tensile resistance increased with the increase in root diameter, following a power law equation, and the relationship between which was significant positively correlated. The power root tensile strength root diameter relationships depend on plant species. The root tensile strength of L. chinense and R. latoucheae decreased with increasing root diameter, following a power law equation and a negative correlation. However tensile strength root diameter relationships within D. millettii did not follow a power law equation. The fine root is better than the coarse root in contributing to stabilize sloping terrain and increasing the value of shear strength within topsoil.

References

[1]Greenway D R. Vegetation and slope stability[C]// Anderson M G, Richards K S. Slope Stability. New York: J Wiley & Sons Ltd, 1987.
[2]Mattia C, Bischetti G B, Gentile F. Biotechnical characteristics of root systems of typical Mediterranean species[J]. Plant and Soil, 2005, 278(1-2): 23-32.
[3]熊燕梅,夏汉平,李志安.植物根系固坡抗蚀的效应与机理研究进展[J].应用生态学报,2007,18(4):895-904.
[4]Stokes A, Atger C, Bengough A G, et al. Desirable plant root traits for protecting natural and engineered slopes against landslides[J]. Plant Soil, 2009, 324:1-30.
[5]Genet M, Stokes A, Salin F, et al. The influence of cellulose content on tensile strength in tree roots[J]. Plant and Soil, 2005, 278(1-2):1-9.
[6]吴征镒.中国植被[M].北京:科学出版社,1980.
[7]刘定辉,李勇.植物根系提高土壤抗侵蚀性机理研究[J].水土保持学报,2003,17(3):34-37.
[8]解明曙.林木根系固坡土力学机制研究[J].水土保持学报,1990,4(3):7-14,50.
[9]Nilaweera N S, Nutalaya P. Role of tree roots in slope stabilization[J]. Bulletin of Engineering Geology and the Environment, 1999, 57(4): 337-342.
[10]李绍才,孙海龙,杨志荣,等.护坡植物根系与岩体相互作用的力学特性[J].岩石力学与工程学报,2006,25(10):2051-2057.
[11]杨永红,刘淑珍,王成华,等.浅层滑坡生物治理中的乔木根系抗拉实验研究[J].水土保持研究,2007,14(1):138-140.
[12]朱海丽,胡夏嵩,毛小青,等.青藏高原黄土区护坡灌木植物根系力学特性研究[J].岩石力学与工程学报,2008,27(z2):3445-3452.
[13]朱海丽,胡夏嵩,毛小青,等.护坡植物根系力学特性与其解剖结构关系[J].农业工程学报,2009,25(5):40-46.
[14]耿威,王林和,刘静,等.鄂尔多斯高原3种4龄至5龄灌木根系抗拉特性初步研究[J].内蒙古农业大学学报:自然科学版,2008,29(3):86-89.
[15]Bischetti G B, Chiaradia E A, Simonato T, et al. Root strength and root area ratio of forest species in Lombardy (Northern Italy)[J]. Plant and Soil, 2005, 278(1-2):11-22.
[16]Baets S D, Poesen J, Reubens B, et al. Root tensile strength and root distribution of typical Mediterranean plant species and their contribution to soil shear strength[J]. Plant Soil, 2008, 305(1-2): 207-226.
[17]赵丽兵,张宝贵,苏志珠.草本植物根系增强土壤抗剪切强度的量化研究[J].中国生态农业学报,2008,16(3),718-722.

Last Update: 2011-04-13