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The study on the sustainability of nitrogen removal on paddy soil

Research Project

Project/Area Number 14360138
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Irrigation, drainage and rural engineering/Rural planning
Research InstitutionIbaraki University

Principal Investigator

KURODA Hisao  IBARAKI University, College of Agriculture, Associate professor, 農学部, 助教授 (20205256)

Co-Investigator(Kenkyū-buntansha) KATO Tasuku  IBARAKI University, College of Agriculture, Lecture, 農学部, 講師 (10302332)
Project Period (FY) 2002 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥10,400,000 (Direct Cost: ¥10,400,000)
Fiscal Year 2005: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2003: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2002: ¥6,400,000 (Direct Cost: ¥6,400,000)
KeywordsNitrogen removal / Light condition / Organic matter / TOC / C / N / Daily change / Soil / 冬期条件 / 脱窒 / 有機物種類 / TIC / 藻類
Research Abstract

It is experimented for the sustainability of nitrogen removal. The soil used in the experiment is sampling from a flood controlled test field that has been non-vegetation since 1991. 1cm of soil surface layer is taken, and the soil was rested for 24 hours and surface water was removed. The 100g soil was put into a beaker, and 300cm^3 NO_3-N of different concentration(10, 20, 40mg・L^<-1>) was added to it. An illuminated incubator was used to change the temperature and light condition to adapt to nature's condition. And, a fixed light and temperature experiment is carried out. To compare the result of the experiment, dark condition samples covered aluminum foil. In light condition, algae growth is noted. Organic matter has great influence in nitrogen removal is understood. Nitrogen removal ability with the existence of light and dark condition and the difference in soil layer thickness, nitrogen removal can be expected in above 10mm soil layer. Any land with above 10mm soil layer can be targeted as nitrogen removal area. In the experiment where light is continuously irradiated, algae grow and nitrogen removal ability is 2 times more than in dark condition. The light condition of daily change experiment is that night(from 19:00 to 5:00) is 0μmol・s^<-1>・m^<-2>, early morning(from 5:00 to 7:00) and evening(from 17:00 to 19:00) is 60μmol・s^<-1>・m^<-2>, the daytime(from 7:00 to 17:00) is 250μmol・s^<-1>・m^<-2>. Temperature was set from test field value. To examine the effect of light condition, we carried out experiment that is fixed light intensity/temperature, light intensity variation (temperature fixed), temperature variation (light intensity fixed) conditions. The result showed the amount of nitrogen removal became a large value with light intensity variation. And it is even bigger than continuous irradiation. This is because when light is on at all time, oxidation condition progressed on. And the denitrification became difficult.

Report

(5 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (11 results)

All 2005 2004 2003 Other

All Journal Article (11 results)

  • [Journal Article] 分布型モデルによる浄化型湿地の配置と窒素負荷量の評価2005

    • Author(s)
      加藤 亮
    • Journal Title

      農業土木学会論文集 235

      Pages: 43-50

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] THE NITRATE NITROGEN POLLUTION AND THE NITROGEN REMOVAL BY PADDY FIELD IN AGRICULTURAL AREA2005

    • Author(s)
      H.KURODA
    • Journal Title

      Journal of Water and Environment Technology Vol.3

      Pages: 165-168

    • NAID

      130000099854

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A DISTRIBUTED WATER QUALITY TANK MODEL FOR NITROGEN LOAD REDUCTION BY ARTIFICIAL WETLANDS2005

    • Author(s)
      T.Kato
    • Journal Title

      Journal of Water and Environment Technology Vol.3

      Pages: 235-242

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Evaluation of Nitrogen Load Removal and the Allocation of Artificial Wetlands by a Distributed Model2005

    • Author(s)
      KATO Tasuku
    • Journal Title

      Trans.JSIDRE 235

      Pages: 43-50

    • NAID

      10014471303

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A DISTRIBUTED WATER QUALITY TANK MODEL FOR NITROGEN LOAD REDUCTION BY ARTIFICIAL WETLANDS2005

    • Author(s)
      T.Nato
    • Journal Title

      Journal of Water and Environment Technology Vol.3

      Pages: 235-242

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 流域水質管理に向けた物質循環評価システムの開発2004

    • Author(s)
      加藤 亮
    • Journal Title

      農業土木学会論文集 232

      Pages: 50-66

    • NAID

      10013513073

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Development of a Material Cycle Evaluating System for Watershed Water Quality Management2004

    • Author(s)
      KATO Tasuku
    • Journal Title

      Trans.JSIDRE 232

      Pages: 59-66

    • NAID

      10013513073

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 窒素負荷削減対策への土地利用別水質タンクモデルの適用2003

    • Author(s)
      加藤 亮
    • Journal Title

      農業土木学会論文集 224

      Pages: 97-103

    • NAID

      80016059410

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Application of Water Quality Tank Model Classified by Land Use to Nitrogen Load Reduction Plans2003

    • Author(s)
      KATO Tasuku
    • Journal Title

      Trans.JSIDRE 224

      Pages: 97-103

    • NAID

      80016059410

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 明条件と暗条件における窒素除去能力の違いについての研究

    • Author(s)
      平野真弓
    • Journal Title

      農業土木学会論文集 (投稿中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Study of Influence to Nitrogen Removal Capability under the Different Condition of Light in Soil of Wetland

    • Author(s)
      HIRANO Mayumi
    • Journal Title

      (It is contributing.)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2002-04-01   Modified: 2016-04-21  

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