| Project/Area Number |
20580067
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | National Institute for Agro-Environmental Sciences |
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Principal Investigator |
KATOU Hidetaka National Institute for Agro-Environmental Sciences, 物質循環研究領域, 上席研究員 (10354036)
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| Co-Investigator(Kenkyū-buntansha) |
MAEDA Morihiro 岡山大学, 大学院・環境学研究科, 准教授 (00355546)
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| Co-Investigator(Renkei-kenkyūsha) |
OSAKA Ken'ichi 滋賀県立大学, 環境科学部, 助教 (30455266)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 土壌 / 土壌圏現象 / 安定同位体 / 物質動態 / 黒ボク土 |
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| Research Abstract |
Andosol subsoils derived from volcanic ash often contain large amounts of adsorbed sulfate. To elucidate the origin and mobility of the adsorbed sulfate, measurements were made on the vertical distribution of sulfate content in soil profiles and the stable isotope ratio of sulfate-S in soils sampled at different depths, together with desorption/elution characteristics and isotopic exchange properties of the adsorbed sulfate. The results demonstrate that sulfates accumulated in agricultural soils have been derived from fertilizers and have origins distinct from those in uncultivated soils, and that the fertilizer-derived sulfate has a relatively large mobility in soil profile, causing desorption and downward displacement of antecedently adsorbed other anions such as nitrate.
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