Relationship between the Growth of an Understory Tree (Pterostyrax hispidus) and Site Factors in Artificial Forests

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  • 人工林内の下層におけるオオバアサガラの生長と立地環境
  • ジンコウリン ナイ ノ カソウ ニ オケル オオバアサガラ ノ セイチョウ ト リッチ カンキョウ

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Abstract

Pterostyrax hispidus, which is not consumed by sika deer, grows in regions that have experienced severe browsing damage. We examined whether introducing P. hispidus to managed forests with poor ground conditions would help preserve the forest floor. Investigation plots were established within a natural community of P. hispidus that grows within managed forests containing Larix kaempferi and Pterocarya rhoifolia. We found that the relative light intensity affected the stand density, height growth, basal diameter, and basal area of P. hispidus and that growth of P. hispidus was better under trees with concave, rather than convex, topography. These results suggest that natural regeneration was succeeding and that P. hispidus seeds will grow in target areas if the relative light intensity is equal to or more than 20% and the canopy topography is concave.

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