Effects of soil micropores on phosphorus and carbon dynamics in soils formed under different environmental conditions

• Project/Area Number: 26660048
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Plant nutrition/Soil science
• Research Institution: Kyoto University
• Principal Investigator: Watanabe Tetsuhiro 京都大学, 地球環境学堂, 助教 (60456902)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 土壌生成 / 二次鉱物 / リン酸 / 土壌有機物 / 火山灰 / 土壌鉱物

Outline of Final Research Achievements

In soils, phosphorus and carbon are most important elements in terms of agriculture and environments: highly mobile phosphorus is available for plants while it may flow into and pollute water system; stabilization organic carbon in soils is beneficial both for soil fertility and mitigation of climate change. Mobility of phosphorus and stability of organic carbon are controlled by surface properties of soils as well as composition of soil secondary minerals. In this study, I revealed 1) the effects of soil forming factors on soil secondary mineral composition in various soils, 2) retarding effect of soil micropores on phosphorus mobility, and 3) the effects of surface hydroxides and micropores of soil particles on organic carbon stabilization.

Research Products

• [Journal Article] Inhibitory effect of soil micro- and small meso-pores on phosphate extraction from soils (2015)
  • Author(s): Watanabe, T., Hase, E., Funakawa, S., Kosaki, T.
  • Journal Title: Soil Science Volume: 180 Issue: 3 Pages: 97-106
  • DOI: 10.1097/ss.0000000000000116
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 風化指標とケイ酸活動度に基づいた土壌粘土鉱物の風化経路 (2015)
  • Author(s): 渡邉哲弘, 太田頼子, 長谷中洋輔, 浦山慧美, 上田史織, Hartono Arief, Mvond Ze Antonie, Kilasara Method, 小崎隆, 舟川晋也
  • Organizer: 日本土壌肥料学会
  • Place of Presentation: 京都大学（京都府・京都市）
  • Year and Date: 2015-09-09
• [Presentation] 地球化学計算プログラムPHREEQCへの腐植モデルWHAM Model-Vの統合とその土壌システムへの適用 (2015)
  • Author(s): 矢ヶ崎泰海, 渡邉哲弘, 舟川晋也
  • Organizer: 日本土壌肥料学会
  • Place of Presentation: 京都大学（京都府・京都市）
  • Year and Date: 2015-09-09
• [Presentation] 火山灰土壌の分布と物理化学的特殊性 (2015)
  • Author(s): 渡邉哲弘
  • Organizer: 日本生態学会
  • Place of Presentation: 鹿児島大学（鹿児島県・鹿児島市）
  • Year and Date: 2015-03-18 – 2015-03-22
  • Invited
• [Presentation] カメルーン火山列の土壌における二次鉱物の分布 (2014)
  • Author(s): 上田史織、渡邉哲弘、中尾淳、杉原創、A. D. Mvondo Ze、舟川晋也
  • Organizer: 日本土壌肥料学会
  • Place of Presentation: 東京農工大学（東京都・小金井市）
  • Year and Date: 2014-09-09 – 2014-09-11
• [Presentation] Effects of active aluminium and iron on phosphate extractability with special reference to soil micro- and meso-pores (2014)
  • Author(s): Watanabe, T., Hase, E., Funakawa, S., Kosaki, T.
  • Organizer: 20th World Congress of Soil Science
  • Place of Presentation: Jeju (Korea)
  • Year and Date: 2014-07-08 – 2014-07-13
• [Book] 土のひみつ 食料・環境・生命 (2015)
  • Author(s): 渡邉哲弘（日本土壌肥料学会「土のひみつ」編集グループ編集）
  • Total Pages: 212
  • Publisher: 朝倉書店