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1991 Fiscal Year Final Research Report Summary

Studies on wetting mechanism of plant leaves by rainfall.

Research Project

Project/Area Number 02660260
Research Category

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

Allocation TypeSingle-year Grants
Research Field 農業気象・生物環境制御学
Research InstitutionOkayama University

Principal Investigator

KIMURA Kazuyoshi  Okayama University, Research Institute for Bioresources, Professor., 資源生物科学研究所, 教授 (10033119)

Co-Investigator(Kenkyū-buntansha) TANAKAMARU Shigemi  Okayama University, Research Institute for Bioresources, Research Associate., 資源生物科学研究所, 助手 (10116478)
Project Period (FY) 1990 – 1991
KeywordsRainfall / Leaf wettability / Contact angle of water / Leaf wax / Drying rate of leaf / Acid rain
Research Abstract

1. The studies were designed to obtain the information on the changes of structure and wettability of leaf surface by wetting of rain water.
(1)Leaf wettability of 17 plant species by wetting of rainfall was examined. Considerable differences were observed among the plant species. Retention of water drops on leaf surface was 10mg/cm^2 or more in rice, tomato, cucumber, radish spinach, etc., and 5mg/cm^2 or less in cabage, welsh onion. (2)The wettability was higher in adult leaves than that of young active leaves. (3)The superficial waxes of leaves were closely related to the wettability, and decreased a markedly by the exposure of rainfall. (4)Leaves of various plants detached after wetting of rainfall for 3 days or more had a higher drying rate than that of non-wetted leaves. (5)The contact angles of water drops on leaves were closely related to the wettability of leaves. (6)The wetting of leaves may be attributed to differences in plant species, leaf age, leaf wax, contact angle of water drops.
2. pH of rainfall at Kurashiki was measured for 4 years(1988-1991). Acid rain which had a pH value lower than 5.6, was observed on 94% of 'the total samples(208 rainfall events). When the yellow sand came fly from China continent, the pH values of rain water was 7.0 or so.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 田中丸 重美,木村 和義,鈴木 晴雄,松村 伸二: "岡山および香川における酸性雨の比較観測." 中国・四国の農業気象. 3. 11-14 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木村 和義: "降雨処理後に切断した葉の乾燥速度." 中国・四国の農業気象. 3. 15-18 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木村 和義: "葉の雨濡れと葉面ワックス." 中国・四国の農業気象. 3. 19-22 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田中丸 重美,木村 和義: "インゲンマメ下杯軸の発根に対するミスト処理の影響." 農業気象. 46. 191-195 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木村 和義: "酸性雨の問題." 「環境制御」岡大環境管理センタ-報. 12. 12-16 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木村 和義: "雨に対する作物の生理・生態学的研究." 日本農業気象学会全国大会学会賞受賞記念講演要旨. 307-313 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tanakamaur, S., Kimura, K., Suzuki, H., Matumura, S.: "Observation of acid rain at Okayama and Kagawa" Agr. Met. Chugoku & Shikoku. 3. 11-14 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura, K.: "Drying rate of leaves detached from plants after rainfall exposure" Agr. Met. Chugoku & Shikoku. 3. 15-18 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura, K.: "Leaf wetting and leaf surface wax." Agr. Met. Chugoku & Shikoku. 3. 19-22 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanakamru, S. and Kimura, K.: "Effect of mist treatment on rooting of hypocotyl cutting of kidney bean." J. Agr. met.46. 191-195 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura, K.: "The problem of acid rain" Report of Environ. Cont. Okayama univ.12. 12-16 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura, K.: "Physiological and ecological studies of crop plant to rainfall." Proc. Soc. Agr. Met. Japan. Commemorative Lecture for Annual Award. 307-313 (1991)

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

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Published: 1993-03-16  

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