豪雪地帯におけるプナーミズナラ二次林

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  • Growth patterns of main woody species composing beech-oak secondary forests in a heavy snowfall region
  • 豪雪地帯におけるブナーミズナラ2次林主要構成樹種の生長パターン
  • ゴウセツ チタイ ニ オケル ブナ ミズナラ 2ジリン シュヨウ コウセイ ジ

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Growth patterns of main woody species in beech-oak secondary forests were examined by means of a trunk analysis. In twenty-year-old stands that originated from stump sprouts after harvest, eleven component woody species were compared for height and diameter growth. For Fagus crenata BLUME, Quercus mongolica FISCHER et TURCZ. var. grosseserrata REHD. et WILS. and Acanthopanax sciadophylloides FR. et SAV. cumulative height growths were in approximately straight lines and their cumulative diameter growths had a tendency for exponential curves. Their heights were shorter than those of the other species for the first ten years, and then become taller twenty years after clear-cutting. Magnolia obovata THUNB. had the greatest height and diameter growth rates for the first three to five years and was the largest size species in the stand until fifteen years after clear-cutting. Growth of other small and medium-size tree species had a tendency to increase for the first ten years after clear-cutting, but thereafter it tended to decrease.

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