Relationship between Stand Structure of a Secondary Forest on the Keihanna Hills and Soil Hardness.

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  • 京阪奈丘陵の二次林の林分構造と土壌硬度との関係
  • ケイハンナキュウリョウ ノ 2ジリン ノ リンブン コウゾウ ト ドジョウ コウド ト ノ カンケイ

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The stand structure of a secondary forest established on the Osaka group and related factors were analyzed. Twenty-seven quadrats were set in the forest, and every tree in those quadrats was measured. A cluster analysis conducted based on the results showed that there were two major stand types, Quercus serrata-dominated type and Pinus densilora-Ilex pedunculosa-dominated type. The former type did not exist at locations with harder soil including more gravel. Q. serrata included fewer older stems than P. densiflora, and known evidence showed that rare Q. serrata once existed on the study site. We conjectured that differences in the growth rate of Q. serrata according to the soil conditions caused the differences between two stand types in this secondary forest.

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