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1999 Fiscal Year Final Research Report Summary

Comparative studies on crop root response to rheological traits in soil.

Research Project

Project/Area Number 09660011
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 作物学
Research InstitutionShinshu University

Principal Investigator

INOUE Naoto  Shinshu Univ., Associate Prof., 農学部, 助教授 (80232544)

Co-Investigator(Kenkyū-buntansha) HAGIWARA Motoyuki  Shinshu Univ., Associate Prof., 農学部, 助教授 (90172840)
Project Period (FY) 1997 – 1999
Keywordsroot / rice / soil / direct seeding / establishment / rheology / viscocity / circumnutation
Research Abstract

Field experiments were carried Out to clarify the differences and key factors in the rate of seedling establishment among rice varieties sown on the soil surface in flooded paddy fields. There is a significant difference among varieties. The main causes for lower seedling establishment rate existed in floating and seedling mortality in the younger stage. These two causes were independent of each other. No clear correlation were found between the percentage of floating seedling and the plant length, the seminal root length or the apparent weight of seedling in water, which has been reported to be the cause of floating seedlings resulting in poor seedling establishment. Root tip rotation was analyzed for indoor-grown seedlings using spectrum analysis: the maximum entropy method (MEM) was used. MEM spectrum analysis clarified that maximum power density detected in the frequency range above 0.1 cycles mmィイD1-1ィエD1 was highly and positively correlated to seedling establishment percentage in the field experiment. From the result, root tip rotation with a larger spiral angle was suggested to play an important role in the establishment of rice seedlings on flooded and very soft soil. The percentage of the seedlings with a spiral root growth with a larger angle was examined on a medium with low viscosity (10-20cp) by using 76 varieties obtained from IRRI Core Collection. The percentage is a convenient and useful method for screening rice varieties with high seedling establishment rate. The higher the viscosity of seedbed is, the higher the frequency of spiral per unit root length in the case of varieties which have a higher ability for establishment.

  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Inoue,N., T.Arase, M.Hagiwara, T.Amano, T.Hayashi and R.Ikeda: "Ecological significance of root tip rotation for seedling establishment of Oryza sativa L"Ecological Research. 14. 31-38 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Arai,T., N.Inoue, R.Ikeda, H.Hirasawa, A.Ujihara and M.Minami: "Evaluation of screening methods for higher seedling establishment rate of direct seeded rice on the soil surface in flooded paddy fields"Jap.J.Tropical Agric.. 43(1). 5-10 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 荒井輝博、井上直人、池田良一、平澤秀雄、氏原暉男、南 峰夫: "イネ湛水土壌表面直播における高苗立ち性品種の簡易検定法の開発とスクリーニング"北陸作物学会. 34. 38-41 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 荒井輝博、井上直人、池田良一、平澤秀雄、氏原暉男、南 峰夫: "イネ湛水土壌表面直播における高苗立ち性品種の簡易検定法の開発とスクリーニング"北陸作物学会講演要旨集[長野]. 26-27 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上直人、野村愛子、萩原素之: "水田におけるイネ根系の経時的な拡張パターンの測定"日本作物学会記事. 67(別1). 60-61 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上直人、野村愛子、菅田裕美、萩原素之: "多収穫水田におけるイネ根系の拡張パターンと活性"日本作物学会記事. 68(別1). 14-15 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中道秀人、井上直人、萩原素之: "ネパール産ダッタンソバにおける根系の形態的変異"日本作物学会記事. 68(別1). 182-183 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上直人: "水稲種子根の回旋運動と苗立ち 根の事典編集委員会 根の事典"朝倉書店. 438(263-264) (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Inoue, N., T. Arase, M. Hagiwara, T. Amano, T. Hayashi and R. Ikeda: "Ecological significance of root tip rotation for seedling establishment of Oryza sativa L."Ecological Research. 14. 31-38 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arai, T., N. Inoue, R. Ikeda, H. Hirasewa, A. Ujihara and M. Minami: "Evaluation of screening methods for higher seedling establishment rate of direct seeded rice on the soil surface in flooded paddy fields."Jap. J. Tropical Agric.. 43(1). 5-10 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inoue, N., T. Amano and K. Khoko: "Seedling establishment of rice sown on soil surface in flooded paddy field. I. Varietal difference in seedling establishment."Japanese Journal of Crop Science. 66. 632-639 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hagiwara M., N. Inoue, T. Arai and R. Ikeda: "Eco-physiological mechanism od occurrence of floating seedling of rice in flooded paddy field."Asian Crop Science 1998. Proceeding of 3ィイD1rdィエD1 Asian Crop Science Conference Taichung, Taiwan, Chinese Society of Agronomy.. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inoue, N., T. Arai, H-Y. Kim and M. Hagiwara: "Relationship between spiral elongation of seminal root and establishment ability in direct seeding rice."Root Research.. 7. 97-100 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arai, T., N. Inoue, R. Ikeda, H. Hirasaw, A. Ujihara and M. Minami: "Simple method for testing spral growth of seminal roots to improve the establishment of direct-seeded rice on the soil surface in flooded paddy fields."Breeding Science. 48. 301-307 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N. Inoue: "Ecological significance of spiralgrowth in rice seminal root."Nogyo oyobi engei. 72(11). 77-85 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arai, T., N. Inoue, R. Ikeda, H. Hirasaw, A. Ujihara and M. Minami: "Simple screening methods for higher seedling Establishment rate of direct sown rice on soil surface in flooded paddy fields."The Hokuriku Crop Science. 34. 38-41 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] "Analysis method of solid distribution for root system of tartary buckwheat."The Hokuriku Crop Science. 33. 121-125 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arai, T., N. Inoue, R. Ikeda, H. Hirasawa, A. Ujihara and M. Minami: "Screening of spiral growth on rice seminal root with IRRI Core Collection"Jap. J. Tropical Agric.. 41(Extra 1). 53-54 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arai, T., N. Inoue, R. Ikeda, H. Hirassawa, A. Ujihara and M. Minami: "Seedling establishment of rice varieties selected by indoor testing method for achievement of higher establishment on soil surface in flooded paddy fields."Breeding Science. 48(Extra 1). 315 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arai, T., N. Inoue, R. Ikeda, H. Hirasawa, A. Ujihara and M. Minami: "Simple screening methods for higher seedling establishment rate of direct sown rice on soil surface in flooded paddy fields."The Meeting of Hokuriku Crop Science [Nagano]. 26-27 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inoue, N., A. Nomura and M. Hagiwara: "A new method for investigation of growth pattern of riceroot system in paddy field."Jpn. J. Crop. Sci.. 67(Extra 1). 60-61 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inoue, N., A. Nomura, H. Sugata and M. Hagiwara: "Expansion pattern and activity of rice roots in high yielding paddy field."Jpn. J. Crop. Sci.. 68(Extra 1). 14-15 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakamichi, H., N. Inoue and M. Hagiwara: "Morphological varietion of root system in Nepalese tartary buckwheat."Jpn. J. Crop. Sci.. 68(Extra 1). 182-183 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inoue, N.: "Comparative studies on rice root response to rheological traits on paddy soil surface."Jpn. J. Crop. Sci.. 68(Extra 2)(Unpublished.). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inoue, N.: "Circumnutation of rice seminal root and seedling Establishment."Ensicropedia of Root. (Eds, Root Research Association), Asakura-Shoten, Tokyo.. 263-264 (1998)

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

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Published: 2001-10-23  

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