Sprout Trait of <I>Cercidiphyllum japonicum</I> Based on the Relationship between Topographies and Sprout Structure

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  • Kubo M
    Inst. of Environ. Sci. and Technol., Yokohama National Univ. Yakushima Sightsee. Ctr.
  • Shimano K
    Biology Department, Central Research Institute of Electric Power Industry
  • Sakio H
    For. Res. Branch, Saitama Pref. Agric. and For. Res. Ctr.
  • Ohno K
    Inst. of Environ. Sci. and Technol., Yokohama National Univ.

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Other Title
  • 地形と萌芽の発生様式からみたカツラの萌芽特性
  • チケイ ト ホウガ ノ ハッセイ ヨウシキ カラ ミタ カツラ ノ ホウガ トクセイ

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Description

Sprout trait of C. japonicum was investigated in relation to the topography and root sprout condition in a riparian forest in Chichibu, central Japan. Almost all C. japonicum had many sprouts without scars caused by disturbances. In a V-shaped valley with constant disintegration of soil-surface and/or rocks, large-sized individuals (stools) had many sprouts, but individuals had few sprouts regardless of stem size at a stable mud-sedimentation site. Moreover individuals with the roots exposed on the ground had many sprouts, but those rooting into the ground had few sprouts. The phenomena that C. japonicum had many sprouts in the V-shaped valley would correlate with what root systems were exposed on the soil surface in the site. There the sprout germination would be affected by stimulus from disintegration of soil surface and rocks. Such a sprout trait of C. japonicum would help the self body maintenance instead of hard seedling establishment with constant soil disturbance.

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