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タイトル: 石綿鉱山跡地の土壌Niが発芽段階のシラカンバおよびケヤマハンノキに与える影響
その他のタイトル: The effects of nickel in the soil of a deserted asbestos mine on the germination of Betula platyphylla var. japonica and Alnus hirsute
著者: 平林, 毅一郎
木村, 徳志
鴨田, 重裕
楠本, 大
著者(別言語): Hirabayashi, Kiichiro
Kimura, Noriyuki
Kamoda, Shigehiro
Kusumoto, Dai
キーワード: Betula platyphylla var. japonica
Alnus hirsuta, serpentine soil
発行日: 2016年8月23日
出版者: 東京大学大学院農学生命科学研究科附属演習林
掲載誌情報: 東京大学農学部演習林報告. 第百三十五号, 2016年8月, pp. 15-25
抄録: There are deserted asbestos mines in the University of Tokyo Hokkaido Forest. It is hard for plants to survive in these mines because of nickel contained in the soil. With the aim of promoting the restoration of vegetation, we selected Betula platyphylla as a candidate tree species for revegetation at these mines and Alnus hirsuta as a control tree species based on a plant survey carried out in the past. We analyzed exchangeable nickel levels in mine soils and experimentally determined the effects of this amount of exchangeable nickel on B. platyphylla and A. hirsuta in the germination stage. B. platyphylla and A. hirsuta germination rates showed only a small response up to 10 ppm exchangeable nickel stress as the nickel amount in the mine soil. Although the initial growth of B. platyphylla was reduced by these nickel levels, more seedlings of B. platyphylla exposed and extended their roots away from the high-nickel growth medium than did seedlings of A. hirsuta. In 10ppm nickel concentration, more than 60% of A. hirsuta blackened their root tips and seemed to be dying prematurely. When extending its root immediately after germination, B. platyphylla shows sensitivity to nickel levels and avoids highly-concentrated nickel.
内容記述: 論文
URI: http://hdl.handle.net/2261/60823
ISSN: 03716007


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