Root distribution and pull-out resistance of <I>Quercus serrata</I> Murray at slopes

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  • YAMASE Keitaro
    Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries
  • TODO Chikage
    Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries
  • YAGURA Yoshiki
    Hyogo Environmental Advancement Association
  • HIRANO Yasuhiro
    Graduate School of Environmental Studies, Nagoya University

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Other Title
  • 斜面地におけるコナラ (<I>Quercus serrata</I> Murray) の根系分布と引き抜き抵抗力
  • 斜面地におけるコナラ(Quercus serrata Murray)の根系分布と引き抜き抵抗力
  • シャメンチ ニ オケル コナラ(Quercus serrata Murray)ノ コンケイ ブンプ ト ヒキヌキ テイコウリョク
  • Root distribution and pull-out resistance of Quercus serrata Murray at slopes

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Abstract

In order to clarify the root distribution and the pull-out resistance of six Quercus serrata Murray grown at the slope with 5～48°angle, we measured the number and diameter of roots > 1 mm in diameter at horizontal and vertical plates of soil profiles (n=4,483) , and performed the pull-out tests (n=640) . The relationships between root diameter and pull-out resistance differed the roots < 30 mm from the all roots (ANCOVA, p<0.05) . The number of horizontal roots was larger than that of vertical roots (paired t-test, p<0.001 or p<0.05) . The roots at the gentle slope grew to downward than upward and the diameter was larger at with gentle slope than that at the steep slope (GLMM, p<0.05) .

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