On the dissociation of Hedysarum scoparium A fundamental research on the H. scoparium, a specie of posammophyte (I)
| Autor: | Zhao, Tingning, Onaga, Kenryo, Gibo, Seiichi |
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| Jazyk: | japonština |
| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | 琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus. 46:121-130 |
| ISSN: | 0370-4246 |
| Popis: | 天然・導入花棒の形態特徴を調査し,統計的な方法により花棒生態型の区分を定量的に行い,生態型別の花棒の形態区別,播種苗の形態変化過程を考察した。さらに,気候変遷に及ぼす花棒生態分化の要因と分化過程を検討した。得られた結果を要約すると次のようになる。1)天然花棒および導入花棒はともに,無小葉花棒と多小葉花棒の両生態型に分けられる。2)二種類生態型花棒の主な形態区別は,複葉,針状葉の数量及びそれぞれの割合が異なることに現れている。3)生態型別花棒苗の形態変化過程が異なる。4)花棒の生態分化は気候の変化,特に地域の乾燥度の変化により引き起こされたものである。 Hedysarum scoparium, one of posammophyte naturally distributed in the deserts of central Asia, are widely afforested in the desert or sandy land of northwestern china for combating desertification. As of vast distribution scope, the H. scoparium differs quietly in different areas. In this paper, firstly, we tried to divide the H. scoparium by the method of cluster analysis based on the morphological data set of branch and leaf sampled from both of its' natural distribution and introduced areas, then discussed it's dissociation process according to the observation to the seedling growth process and results of primary component analysis on the climatic characteristics across the whole area of distribution. It was founded that, 1), H. scoparium can be divided into two ecotypes, i.e. non-leaflet and poly-leafleat ecotypes; 2), these two ecotypes differs mainly in the amount and rate of compound leaf and needle-like leaf; 3), the morphological variation process differs from each other of these two ecotypes in the seedling stage; 4), the dissociation of H. scoparium could be due to the climatic change in ancient time. 紀要論文 |
| Databáze: | OpenAIRE |
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