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1995 Fiscal Year Final Research Report Summary

The Role of Roots in Different Depth on Water Absorption of Potato

Research Project

Project/Area Number 06660012
Research Category

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

Allocation TypeSingle-year Grants
Research Field 作物学
Research InstitutionHokkaido University

Principal Investigator

IWAMA Kazuto  Hokkaido Univ., Fac.of Agri., Associate Professor, 農学部, 助教授 (70144219)

Project Period (FY) 1994 – 1995
KeywordsDRY MATTER PRODUCTION / PHOTOSYNTHETIC RATE / TRANSPIRATION RATE / WATER ABSORPTION / DROUGHT TOLERANCE / GRAFTING / POTATO / VARIETAL DIFFERENCE
Research Abstract

Two potato varieties with different root mass were examined in the irrigated and unirrigated fields with rain shelters to investigate the changes in water absorption at different depth during the growth, the effect of soil water condition on root development, and the relationship of varietal difference in root mass with transpiration rate, leaf growth and total dry matter production. Additionally four combinations of grafting plants produced with the two varieties were also compared in the present study.
At the unirrigated plot the soil water was absorbed stepwise from the shallow depth downward and finally from the depth of 150 cm. The root length in the depth deeper than 20 cm was greater at the unirrigated plot than at the irrigated plot in both varieties. Although the varietal order in root length was consistent at both plots, the varietal difference was larger in the depth of 0-20 cm at the irrigated plot, while in the depth of 20-70 cm at the unirrigated plot. The leaf growth, transpiration rate and photosynthetic rate were severely depressed at the unirrigated plot in both varieties. The extent of the depressions, however, was greater in Konafubuki of smaller root length than in Norin 1 of larger root length. The depression of dry tuber yield by soil dryness was also greater in Konafubuki than in Norin 1. In the grafting plants, the stock genotypes mainly influenced the root growth at both plots and the extent of depressions in shoot and tuber growth at the unirrigated plot.
We concluded that the difference in root growth between the two varieties was mainly due to the inherent characteristic in the dry matter partition between root and tuber, and corresponded to the drought tolerance.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 岩間ら: "土壌の乾燥が根量の異なるバレイショ2品種の生長に及ぼす影響 1.根長,葉面積および部位別乾物重" 日作紀. 64(別2). 141-142 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩間ら: "土壌の乾燥が根量の異なるバレイショ2品種の生長に及ぼす影響 2.蒸散速度,生長パラメータおよび塊茎収量" 日作紀. 64(別2). 143-144 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩間ら: "1994年の北大農場におけるバレイショ塊茎の2次生長と土壌水分条件との関係" 北海道大学農学部農場研究報告. 29. 15-22 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iwama,K.et al.: "Effect of drought on the growth of two potato varieties with different root mass" Books of Abstracts 4th ESA-congress,7-11 July 1996,Wageningen,The Netherlands. Vol.1. 94-95 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩間ら: "バレイショ品種間の接木個体の塊茎の形に及ぼす穂木と台木,および土壌水分条件の影響" 北海道大学農学部農場研究報告. 30. 21-30 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川嶋ら: "バレイショにおける葉の拡散抵抗の日変化,生育に伴う推移ならびに葉の表裏面間および葉位間の差異" 日作紀. 66(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iwama, K., H.Kawashima, T.Kaneko, N.Moki and S.Ichikawa: "Effects of drought on the growth of two potato varieties with different root mass, I.Root length, leaf area and dry weight of each organ" Jpn.J.Crop Sci.64 (Extr.2). 141-142 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Iwama, K., H.Kawashima, T.Kaneko, N.Moki and S.Ichikawa: "Effects of drought on the growth of two potato varieties with different root mass, 2. Transpiration rate, growth parameter and tuber yield" Jpn.J.Crop Sci.64 (Extr.2). 143-144 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Iwama, K., H.Kawashima, T.Kaneko, N.Moki and S.Ichikawa: "Relationship between second growth of potato tubers and soil water conditions at the farm of Hokkaido University in 1994" Res.Bull.Univ.Farm Hokkaido Univ.29. 15-22 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Iwama, K., H.Kawashima, T.Kaneko and K.Nakaseko: "Effect of drought on the growth of two potato varieties with different root mass" Book of Abstracts 4th ESA-congress, 7-11 July 1996, Veldhoven-Wageningen, The Netherlands. 1. 94-95 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Iwama, K., T.Kaneko, S.Adachi, T.Inoue, N.Moki and S.Ichikawa: "Effects of scion and stock, and soil water condition on tuber shape of grafting plants between two potato varieties" Res.Bull.Univ.Farm Hokkaido Univ.30. 21-30 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kawashima, H., K.Iwama, T.Kaneko, Y.Masaki and K.Nakaseko: "Diurnal and seasonal chahges in diffusion resistance of potato leaves and their differences between the adaxial and abaxial leaf surfaces and between three leaf positions on stem" Jpn.J.Crop Sci.66 (In press).

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      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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