Effects of the Density of Midstory Deciduous Hardwood Trees on Understory Vegetation in Pinus densiflora Plantations in Ohshuku District, Iwate Prefecture, Northern Japan.

Kunisaki T

doi:10.11519/jjfs1953.86.3_258

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岩手県鶯宿地方のアカマツ人工林における亜高木層の落葉広葉樹の密度の違いが林床のクマイザサ, 稚樹の密度に及ぼす影響
岩手県鴬宿地方のアカマツ人工林における亜高木層の落葉広葉樹の密度の違いが林床のクマイザサ,稚樹の密度に及ぼす影響
イワテケンオウシュクチホウノアカマツジンコウリンニオケルアコウボクソウノラクヨウコウヨウジュノミツドノチガイガリンショウノクマイザサチジュノミツドニオヨボスエイキョウ

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I examined the correlations among density parameters (basal area, stem or culm density, and aboveground biomass per unit area) of overstory trees, midstory trees, and understory vegetation (dwarf bamboo Sasa senanensis and tree saplings) in closed and stratified young plantations of Pinus densiflora and deciduous hardwood species. The overstory tree density (P. densiflora) was not correlated with the midstory tree density (deciduous hardwoods). By contrast, the midstory tree density was negatively correlated with the dwarf bamboo density and the light intensity above the understory vegetation in September, when the deciduous hardwoods were leafy. The dwarf bamboo density was positively correlated with the light intensity above the understory vegetation in September. The dwarf bamboo density negatively affected the tree sapling density. In conclusion, the shading effect of midstory hardwoods regulated dwarf bamboo density. In turn, the dwarf bamboo inhibited tree regeneration in stratified P. densiflora plantations.

Journal

JOURNAL OF THE JAPANESE FORESTRY SOCIETY

JOURNAL OF THE JAPANESE FORESTRY SOCIETY 86 (3), 258-264, 2004

THE JAPANESE FORESTRY SOCIETY

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