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Accumulation of phosphorus in cultivated soils phosphate phase, sorption and desorption properties

Research Project

Project/Area Number 02453119
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 土壌・肥料
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

NANZYO Masami  Tohoku Univ. Fac. Agrie. Assistant professor, 農学部, 助教授 (60218071)

Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 1992: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥5,400,000 (Direct Cost: ¥5,400,000)
Keywordscultivated soil / phosphorus / phosphorus accumulation / active aluminum / allophane / Andisol / exchangeable cation / reducing agent / 火山灰土壌 / 沖積土 / スポドリル / リン酸カルシウム / リン酸マグネシウム / 荷電収支 / 溶解度積 / リン酸イオン / 収着 / 脱着 / 配位子交換 / 物質収支 / リン酸肥料
Research Abstract

This report consists of the following three points. 1. Mechanism of phosphate sorption and desorption of Andisols Clay fractions of six allophanic and nonallophanic andisols from northeastern Japan were used to determine the reactions associated with phosphate sorption. When phosphate was sorbed on these materials, aluminum dissolved in the solution at low pH precipitated, the amount positive charge decreased, pH rose, silicate and organic matter was released and the amount negative charge was increased. Contribution of the individual reactions depends on the type soils, pH and the amount of phosphate sorbed.
When phosphate was desorbed from these materials, the amount of negative charge was decreased. 2. Mechanism of phosphate sorption on smectic soils
Cultivated smectic soils contain large amount of exchangeable Ca and Mg though the contents of active aluminum and iron are much less than those for Andisols. These exchangeable cations react with phosphate to form CaHPO_4.2H_2O and MgNH_4PO_4._2O at around pH 7.3. Release of phosphate from phosphated hydrous iron oxide using organic reducing agents
Reducing agents having chelating effect such as chatecol and ascorbic acid showed higher effect for phosphate release from phosphated hydrous iron oxide than those without chelating effect.

Report

(3 results)
  • 1992 Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 南條 正巳他2名: "主な農耕地土壌のリン酸吸収係数に対する交換性イオンの影響" 日本土壌肥料学雑誌. 63. 559-565 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 南條 正巳他3名: "スメクタイト質土壌のリン酸吸収係数における交換性イオンの役割" 日本土壌肥料学雑誌. 62. 41-48 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 南條 正巳: "chemi-sorption of phosphate on Andisols(Volcanic ash soils)-Material balance and the sorption product-" Phosphorus Research Bulletin. 1. 471-476 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 南條 正巳: "Stoichiometry for the decrease in the amount of phosphate-induced negative charges of clay fractions of Andisols" Soil Science and plant Nutrition. 37. 357-361 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 南條 正巳: "Effects of organic reducing agents on the P sorption prod1cts formed on noncrystalline hydrous Fe oxide" Soil Science and Plant Nutrition. 36. 511-514 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nanzyo, M., Uhm, T., and Shoji, S.: "Effect of exchangeable cations on the phosphate sorption coefficient of the cultivated soils" Japanese Journal of soil Science and Plant Nutrition. 63-5. 559-565 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nanzyo, M., Makino, T., Shoji, S., and Takahashi, T.: "Role of exchangeable cations in the measurement of phosphate sorption coefficient of smectic soils. Study on Hachirougata reclaimed soils." Japanese Journal of Soil Science and Plant Nutrition. 62-1. 41-48 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nanzyo, M.: "Chemi-sorption of phosphate on Andisols (Volcanic ash soils)-Material balance and the sorption product-" Phosphorus Research Bulletin. 1. 471-476 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nanzyo, M.: "Stoichiometry for the decrease in the amount of phosphate-induced negative charges of clay fractions of Andisols." Soil Science and Plant Nutrition. 37-3. 357-361 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nanzyo, M.: "Effects of organic reducing agents on the P sorption products formed on noncrystalline hydrous Fe oxide" Soil Science and Plant Nutrition. 36-4. 511-514 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Nanzyo: "Chemiーsorption of phosphate on Andisols(volcanic ash soils)‐material balance and the sorption productー" Phosphorus Research Bulletin. 1. 471-476 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] M.NANZYO: "Effects of organic reducing agents on fhe Psorpion Products formed on noncrysta Talline hydrous Fe oxide" Soil Science and Plant Nutritision. 36. 511-514 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 南條 正巳・牧野 知之,庄子 貞雄・高橋 正: "スメクタイト質土壌のリん酸吸収系数における交換性イオンの役割ー八郎潟干拓地主壌について" 日本土壌肥料学雑誌. 62. 41-48 (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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