1995 Fiscal Year Final Research Report Summary
Studies on injury of leaf and floral petal by acid rain.
| Project/Area Number |
06660323
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
生物環境
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| Research Institution | Okayama University |
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Principal Investigator |
KIMURA Kazuyoshi Okayama University, Research Institute for Bioresources, Professor., 資源生物化学研究所, 教授 (10033119)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKAMARU Shigemi Okayama University, Research Institute for Bioresources, Research Associate., 資源生物化学研究所, 助手 (10116478)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Acid rain / Leaf / Floral petal / Injury |
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| Research Abstract |
1) Leaf injury by simulated acid rain was examined in the 59 species of plants. The leaf injury was observed in 11 species at pH 2.5, in 42 species at pH 2.0, in 55 species at pH 1.5.
2) Injury of floral petal by simulated acid rain was examined in the 44 species of plants. The injury was observed in 6 species at pH 4.5-4.0, in 17 species at pH 3.5-3.0, in 29 species at pH 2.5-2.0, in 44 species at pH 1.5-1.0.
3) pH and electric conductivity (EC) of rain water at Kurashiki were measured during 5 years from 1991 to 1995.
The most frequent pH of rain water recorded at Kurashiki was 4.0-4.5. The rain water sampled during the 5 year period had a mean pH of 4.38, the highest pH was 7.0 and the lowest was 3.3. The so-called "acid rain" which hada pH value lower than 5.5, was observed on 99% of the total rainy days. The most frequent range of EC of rain water was 20-40 uS/cm (40% of total rainy days).
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