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2002 Fiscal Year Final Research Report Summary

Development of ion control system of nutrient solutions for preservation of environment and high quality production

Research Project

Project/Area Number 13660263
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生物環境
Research InstitutionMIYAZAKI UNIVERSITY

Principal Investigator

INDEN Haruhisa  Miyazaki University, Faculty of Agriculture, Professor, 農学部, 教授 (60151768)

Project Period (FY) 2001 – 2002
Keywordshydroponics / management of nutrient solution / ionic balance / ion concentration / "IonAdjuster" / waste nutrient solution
Research Abstract

A computer software program for aiding the mixture of macronutrients in nutrient solutions, named "IonAdjuster", has been developed to select the best combination from various nutrient sources to determine required addition rates, according to user-specified demand and current analysis results. "IonAdjuster" determines the quantity of concentrated stock solution to be added from differences in required composition and the present macronutrient concentrations in solution. In practical hydroponic culture of fruit vegetables, fluctuation of ion contents of the solution was decreased and the percentage of top-grade fruit increased by the nutrient stock addition according to "IonAdjuster". On the contrary, in the traditional EC control method, each ion concentration greatly fluctuated, this meant it shifted considerably from the initial value in the later stage of cultivation, and the ionic balance also collapsed. The value of pH decreased gradually as usual in the nutrient solution culture, however, adding the pH stabilization routine to the ion concentration control method could solve it. It was assumed that the combination of "IonAdjuster" and automatic ion sensing, might allow for appropriate and continuous control of solutions in closed hydroponics. This developed system may result in higher crop production, more efficient use of fertilizer and environmental loading reduction by decreasing waster nutrient solution at renewal from open hydroponic systems.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 久保田 豊: "養液イオン濃度調製プログラムを使用したキュウリの栽培"植物工場学会誌. 13. 104-109 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 位田晴久: "複合肥料を用いたイオン濃度制御によるキュウリの養液栽培"農業環境工学関連4学会2001年合同大会講演要旨. 237 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 森岡仁志: "イオン濃度制御法によるイチゴ養液栽培について"園芸学会九州支部研究集録. 9. 61 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 位田晴久: "イオン濃度制御法によるK濃度低減養液管理がトマトの生育と果実品質に及ぼす影響"園芸学会雑誌. 71. 147 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 位田晴久: "培養液のイオン濃度管理システムについて"植物工場学会九州支部大会シンポジウム要旨. 19-24 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 霧村雅昭: "インテリジェントシステムにおける培養液中イオン濃度補正精度の向上を目的としたIonAdjusterの改良"農業環境工学関連5学会2003年合同大会講演要旨. (発表予定). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kubota, Y.: "Hydroponic culture of cucumber using the software for automatic ion control of nutrient solutions"Journal of Society of High Technology in Agriculture. 13. 104-109 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inden, H.: "Nutriculture of cucumber by ion control system using mixed fertilizer"Proc. Annual Meeting of Soc. High Technology in Agri.. 237-237 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Morioka, H.: "Hydropoinc culture of strawberry using the software for automatic ion control"Mem. Japan Soc. Hort. Sci. Kyushu Branch. 9. 61-61 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inden, H.: "Effects of reduction of potassium concentration in nutrient solution by ion control method on growth and fruit quality of tomato"Jour. Japan Soc. Hort. Sci.. 71(suppl.2). 147-147 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inden, H.: "Management of nutrient solution by ion control method"Proc. Sympo. Soc. High Technology in Agri. Kyushu Branch. 19-24 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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