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Exploring the variability in elastic properties of roots in Alpine tree species

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  • Alessio Cislaghi

    (Department of Agricultural and Environmental Sciences (DiSAA), University of Milan, Milan, Italy
    Centre of Applied Studies for the Sustainable Management and Protection of Mountain Areas (Ge.S.Di.Mont), University of Milan, Brescia, Italy)

Abstract

Quantifying the soil reinforcement provided by roots is essential for assessing the contribution of forests to reducing shallow landslide susceptibility. Many soil-root models were developed in the literature: from standard single root model to fibre bundle model. The input parameters of all models are the geometry of roots (diameter and length) and the biomechanical properties (maximum tensile force and elastic modulus). This study aims to investigate the elastic properties estimated by the stress-strain curves measured during tensile tests. A standard procedure detected two different moduli of elasticity: one due to the root tortuosity, and the other due to the woody fibres of roots. Based on a large dataset of tensile tests on different Alpine tree species, the relationships between elastic modulus and root diameter was estimated for each series. Further, the interspecific and intraspecific variability in such relationships was investigated by a statistical analysis. The results showed more intraspecific differences in the elastic modulus vs. root diameter relationships compared to the interspecific ones. This outcome could be an important criterion of discrimination to explain the variability of the elastic properties and to provide representative biomechanical properties for specific environmental conditions.

Suggested Citation

  • Alessio Cislaghi, 2021. "Exploring the variability in elastic properties of roots in Alpine tree species," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 67(7), pages 338-356.
    • Handle: RePEc:caa:jnljfs:v:67:y:2021:i:7:id:4-2021-jfs
    DOI: 10.17221/4/2021-JFS
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    References listed on IDEAS

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    1. Ali Akbar Mohammad Ali Pourmalekshah & Mohamad Hadi Moayeri & Aidin Parsakhoo, 2019. "Effect of the root biotechnical characteristics of Alnus subcordata, Paulownia fortunei and Populus deltoides on the soil mechanics," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 65(7), pages 283-290.
    2. Yuanjun Yang & Lihua Chen & Ning Li & Qiufen Zhang, 2016. "Effect of Root Moisture Content and Diameter on Root Tensile Properties," PLOS ONE, Public Library of Science, vol. 11(3), pages 1-17, March.
    3. E. Abdi & F. Azhdari & A. Abdulkhani & H. Soofi Mariv, 2014. "Tensile strength and cellulose content of Persian ironwood (Parrotia persica) roots as bioengineering material," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 60(10), pages 425-430.
    4. Lihua Chen & Pinghua Wang & Yuanjun Yang & Jia He, 2014. "Constitutive Model of Single Root System’s Resistance to Tensile Stress - Taking Pinus tabulaeformis, Betula platyphylla, Quercus mongolica and Larix gmelinii as Experimental Objects," PLOS ONE, Public Library of Science, vol. 9(4), pages 1-7, April.
    5. R. Naghdi & S. Maleki & E. Abdi & R. Mousavi & M. Nikooy, 2013. "Assessing the effect of Alnus roots on hillslope stability in order to use in soil bioengineering," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 59(11), pages 417-423.
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