Calcium Accumulation Alleviates Soil Acidification in Japanese Cedar (Cryptomeria japonica) Stands(Environment)
スポンサーリンク
概要
- 論文の詳細を見る
Larger amounts of exchangeable calcium (Ca^<2+>) accumulated in the surface soil in an older Japanese cedar (Cryptomeria japonicd) stand, compared with the younger stand. We estimated the Ca^<2+> accumulation rate and examined the difference in the amounts of exchangeable Ca^<2+> based on the Ca^<2+> fluxes. Samples of soil percolated water were taken using stainless tension-free lysimeters at different depths (under O horizon, 10, 40, and 80 cm). Mobilization of base cations was controlled by total acid production. Proton load associated with N transformation was an important factor for the mobilization of base cations, especially for bivalent cations. Base cations tended to be mobilized in the O horizon and immobilized in soil horizons. The amount of Ca^<2+> supplied from the O horizon exceeded the amount recorded at the depth of 0-10 cm in the older Japanese cedar stand, resulting in the immobilization of 120 mmol_c m^<-2> yr^<-1> of Ca^<2+> from October 2000 to September 2001. The amount of immobilized Ca^<2+> in the soil horizons in each period depended on the mobilized amounts in the O horizon. Lower amount of supplied Ca^<2+> in the O horizon and mobilization at the depth of 0-10 cm in the younger stand contributed to the difference in the amount of exchangeable Ca^<2+>. Mobilization of base cations in the O horizon alleviated the loss of base cations in soil under Japanese cedar stands and contributed to the suppression of soil acidification.
- 社団法人日本土壌肥料学会の論文
著者
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SUGIURA Toshihiro
School of Veterinary Medicine, Kitasato University
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Kobayashi Hiroshi
Faculty of Agriculture, The University of Tokyo
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Kobayashi H
Kitasato Univ. Towada Jpn
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Sugiura Toshihiro
Faculty Of Veterinary Medicine And Animal Sciences Kitasato University
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Kato Masataka
Faculty Of Veterinary Medicine And Animal Sciences Kitasato University
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Baba Mitsuhisa
Faculty of Veterinary Medicine and Animal Sciences, Kitasato University
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Baba M
Kitasato Univ. Towada Jpn
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Baba Mitsuhisa
Faculty Of Veterinary Medicine And Animal Sciences Kitasato University
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Baba Mitsuhisa
Faculty Of Agriculture Tokyo University Of Agriculture And Technology : Faculty Of Veterinary Medici
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Kobayashi Hiroshi
Faculty Of Agriculture Kinki University
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