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[1]Huang Mengqi,Zhang Chaobo,Ding Yang,et al.Pullout Mechanical Properties of Alfalfa Roots in Loess Region Under Alternate Drying-Wetting[J].Research of Soil and Water Conservation,2024,31(01):214-223.[doi:10.13869/j.cnki.rswc.2024.01.019]

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Pullout Mechanical Properties of Alfalfa Roots in Loess Region Under Alternate Drying-Wetting

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 01 Page number: 214-223 Column: Public date: 2024-02-20

Title:: Pullout Mechanical Properties of Alfalfa Roots in Loess Region Under Alternate Drying-Wetting

Author(s):: Huang Mengqi, Zhang Chaobo, Ding Yang, Zhang Qiang, Feng Xiaohui, Jiang Jing; (College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

Keywords:: alternate drying-wetting; alfalfa root; pullout mechanical properties; coupling influence

CLC:: S157.2

DOI:: 10.13869/j.cnki.rswc.2024.01.019

Abstract:: [Objective] The aims of this study are to reveal the effect of alternate drying-wetting on the pullout mechanical properties of herb roots in the loess region, and to provide some theoretical support and basis for herbaceous plant root soil fixing and slope protection engineering. [Methods] pullout test in laboratory was conducted on remolded loess samples with/without alfalfa roots to study the relationship between root pullout mechanical properties and the influencing factors, root diameter, root length, soil bulk density and alternate drying-wetting. [Results](1)The mechanical properties of alfalfa roots were correlated with root diameter, root length and soil bulk density in power functions or exponential functions.(2)The roots pullout mechanical properties of the samples with alternate drying-wetting significantly reduced compared with those of the samples without alternate drying-wetting.(3)The pullout mechanical properties of alfalfa roots in the sandy loam were better than those of the roots in the loam, and the effect of alternate drying-wetting on the mechanical properties of alfalfa roots in the sandy loam was less than that in the loam.(4)The coupling effects of root diameter, root length, bulk density and alternate drying-wetting had significant effects on the pullout mechanical properties of alfalfa roots. [Conclusion] Under alternate drying-wetting conditions, the root diameter, root length and soil bulk density had certain effects on the mechanical properties of alfalfa roots.

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Last Update: 2024-02-20