阿蘇火山の森林生態系におけるリン，窒素，カリウム，カルシウム，マグネシウム，ナトリウムとＢＨＣの分布と移動

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  • Distribution and turnover of phosphorus, nitrogen, potassium, calcium, magnesium and sodium and BHC in the forest ecosystem of Aso volcano.
  • アソ カザン ノ シンリン セイタイケイ ニ オケル リン チッソ カリウム

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The content of elements in the H- and F-soil layers (cryptomeria pure forest and cryptomeria, white cedar, andromeda and hydrangea mixed forest) was in the order of calcium>magnesium>sodium>potassium>nitrogen=phosphorus. On the other hand, the content was in the order of K>N>Ca>Mg>Na=P for the herbs; N>Ca>K>Na=P for the trees. However, the content of N, K, P and Na (the content of each element was almost the same) was higher than that of Ca and Mg for insects. The content of N, Mg and P in the herbs near the craters was high compared with that in areas at a lower elevation the amount of BHC residues decreased in the order of L-layer>F-layer>H-layer and the amount of BHC residues in trees decreased near the creaters.

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