土壌条件の違いがアカエゾマツの成長および物質循環に与える影響 : 泥炭土, 灰色台地土に成立するアカエゾマツ林における比較 : 泥炭地・灰色台地土に生育するアカエゾマツの幹直径の動態の比較

DOI 日本農学文献記事索引 Web Site 被引用文献1件 参考文献32件

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タイトル別名
  • The Effects of Soil Conditions on Spruce (Picea glehinii) Growth and Nutrient Cycling in Gray Upland Soils and Peat Soils
  • 土壌条件の違いがアカエゾマツの成長および物質循環に与える影響--泥炭土、灰色台地土に成立するアカエゾマツ林における比較
  • ドジョウ ジョウケン ノ チガイ ガ アカエゾマツ ノ セイチョウ オヨビ ブッシツ ジュンカン ニ アタエル エイキョウ デイタンド ハイイロ ダイチド ニ セイリツ スル アカエゾマツ リン ニ オケル ヒカク

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In order to understand the effects of soil condition on tree growth and nutrient cycling, we monitored the changes in stem diameter and analyzed the nutrient content of current-year needles and leaf litter of Picea glehinii growing in Gray Upland and Peat soils. Stem diameter showed diurnal changes that reflected transpiration and water uptake in both soils. However, the increase in stem diameter was larger in Gray Upland soils than in Peat soils, probably due to the longer growing period of Picea glehinii in the former than in the latter. During a rainy day within the growing period, the average increase in stem diameter was 35 μm d^<-1> in Gray Upland soils and 23 μm d^<-1>in Peat soils. These results suggested that the excessive soil water content in Peat soils weakened the response to rainfall of Picea glehinii. The poor soil water condition in Peat soils was reflected in the minimal growth of Picea glehinii in this soil. Litterfall production in Gray Upland soils was more than twice of that in Peat soils and the C/N ratio of the litterfall in Peat soils was statistically higher than that of Gray Upland soils. The poor soil water condition in Peat soils may have restricted the growth and nutrient uptake of Picea glehinii, which resulted to a low production of litterfall and its high C/N ratio. Results of this study have shown that soil conditions affect tree growth and nutrient cycling.

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