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Evaluation of natural- and agro-ecosystem by soil chemistry

Research Project

Project/Area Number 08660077
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Plant nutrition/Soil science
Research InstitutionKochi University

Principal Investigator

SAKURAI Katsutoshi  Kochi University, Faculty of Agriculture, Professor, 農学部, 教授 (90192088)

Co-Investigator(Kenkyū-buntansha) IWASAKI Kozo  Kochi University, Faculty of Agriculture, Associate professor, 農学部, 助教授 (40193718)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsNihon-sida grassland / reclaimed land / soil microorganisms / fungi / bacteria / low molecular weight organic acids / water-stable aggregate / 耐水性団粒 / 農業生態系 / 日本シバ草地 / 土壌溶液 / 環境水 / 荷電ゼロ点 / 草地の塾畑化 / 土壌硬度 / 自然肥沃度
Research Abstract

In1996, study site was selected from several types of land use to investigate geomorphlogical and morphological properties of the soils. Soil samples were collected there. Water samples were also collected from the surrounding area. Items for soil analysis were as follows ; Physical : texture, three phase distribution, saturated hydraulic conductivity, Chemical : exchangeable cations (Ca, Mg, Na, and K), exchangeable Al and H,cation exchange capacity, available phosphorus, total carbon and nitrogen, pH (H_2O and KCl), Charge : zero point of charge, sigmap, Mineralogy : Tamm and DCB extractable oxides and hydroxides, clay mineralogy. Soil hardness and hydraulic conductivity were measured in the field on May, September, and December in 1996.
In 1997, we had conducted monitoring in grassland in view of microorganisms, soil solution composition, pH and EC.We measured soil hardness and collected fresh soils on June, September, December in 1997. Actinomycetes and fungi were counted using dilute plate method. On the other hand, we evaluated the low molecular weight organic acids with air dried soils. Comparing older grassland with younger grassland and natural forest, we found that (1) the old grassland had a little water-soluble nutrients, (2) showed no difference between surface and subsurface soils, and (3) had stable soil condition to circulate nutrients and water within the depth of 5 to 20cm.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] K.Sakarai, Nakamori, T., Ishizaka, S., and Iwasaki, K.: "Determination of low molecular weight organic acids in forest soils." In(Eds.)T.Ando et al.Plant natrioton for sabstainable food prodaction and enviroment.Klawer Academic Publishers.503-504 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Iwasaki, Tsuji, M.and Sakurai, K.: "Fractionation of soil copper and inarganese in the rhizosphere of finger nillet." In(Eds.)T.Ando et al.Plantnatrition for substainable food production and enviroment.Kluwer Academic Pablishers.501-502 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 石塚 悟史・櫻井 克年: "造成された日本シバ草地土壌の経年変化" 日本土壌肥料科学雑誌. 68(5). 549-558 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Sakurai et al.: "Determination of low weight organic acids in soils." In (Eds.) T.Ando et al. Plant nutrition for substainable food prodaction and forest environment. Kluwer Avcademic Publishers.503-504 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Iwasaki et al.: "Fractionation of soil copper and manganese rhizosphere of finger milet." In (Eds.) T.Ando et al. Plant nutrition for substainable food prodaction andin the environment. Kluwer Avcademic Publishers.501-502 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Ishizuka et al.: "Mechanism for the stabilization of reclaimed Nihon-Siba (sosiba japonica) Glassland." Japanese Joarnal of Sil Science and Plant Nutrition. 68(5). 549-558 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Sakurai,Nakamura,T.,Ishizaka,S.,and Iwasaki,K.: "Determination of low molecular weight organic acids in forest soils." In(Eds.)T.Ando et al.Plant nutrition for substainable food production and enviroment.Kluwer Academic Publishers.503-504 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Iwasaki,Tsuji,M.,and Sakurai,K.: "Fractionation of soil copper and manganesc in the rhizosphere of finger millet." In(Eds.)T.Ando et al.Plant natrition for sastainable food production and enviroment.Kluwer Academic Publishers.501-502 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 石塚 悟史・櫻井克年: "造成された日本シバ草地土壌の経年変化" 日本土壌肥料学雑誌. 68(5). 549-558 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 石塚悟央 岩崎貢三、櫻井克年: "造成された日本シバ草地土壌の経年変化" 日本土壌肥料学雑誌.

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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