Potassium-calcium exchange in five Ap soils from paddy fields and its effect on potassium concentration in soil solution

Shin-Ichiro Wada, Koji Odahara, Koji Odahara

研究成果: ジャーナルへの寄稿学術誌査読

13 被引用数 (Scopus)

抄録

We measured the selectivity coefficient (K V) for K-Ca exchange equilibrium as a function of K-saturation on two smectitic soils, two halloysitic soils and a soil dominated by noncrystalline aluminum silicates. The selectivity coefficients for all the soils decreased as K-saturation increased. Among the five soils, the halloysitic soils exhibited higher K Vvalues than the smectitic soils, while the K Vvalues for the soils dominated by noncrystalline aluminum silicates were comparable with those of the halloysitic soils at low K-saturation but the K Vvalues were even lower than those for the smectitic soils at higher K-saturation. Numerical simulations showed that the K concentration in the soil solution after addition of a K-salt differed significantly among the soils, depending on the exchangeable K status and K-selectivity of the soils.

本文言語英語
ページ(範囲)129-138
ページ数10
ジャーナルSoil Science and Plant Nutrition
39
1
DOI
出版ステータス出版済み - 1月 1 1993

!!!All Science Journal Classification (ASJC) codes

  • 土壌科学
  • 植物科学

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