Climate conditions and revegetation using forest topsoil in the slopes

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  • KUBO Masako
    Shimane University
  • MATSUE Masahiko
    National Ins. for Land and Infrastruc-ture Management, Ministry of Land, Infrastructure, Transport and Tourism
  • IIZUKA Yasuo
    National Ins. for Land and Infrastruc-ture Management, Ministry of Land, Infrastructure, Transport and Tourism

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Other Title
  • 森林表土を利用した緑化のり面に成立する植生と気候要因の関係
  • シンリン ヒョウド オ リヨウ シタ リョッカノリ メン ニ セイリツ スル ショクセイ ト キコウ ヨウイン ノ カンケイ

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Abstract

To clarify the vegetation types after revegetation using forest top-soil, we investigated the vegetation, climate conditions and consulting and/or slope conditions in the 65 sites including 1-8 passing years in 30 regions in Japan. A two way indicator species analysis divided species composition of plants of 65 sites into the vegetation with indicator species including Alnu shirsuta and Salix bakko in cool-temperate zone and that including Solidago altissima in warm-temperate zone. Plant species in warm-temperate zone, moreover, divided into the vegetation with dominant Digitaria adscendens in the early stages after greening, that with dominant S. altissimain lower annual mean precipitation around the urban area, and that with Miscanthus sinensis and many tree specis. In cool-temperate zone, the vegetation is divided into those with A. hirsuta and Weigela hortensis in the heavy snow area and those with Euptelea polyandra in the dams. Herb cover rate decreased and tree cover rate increased with passing months after greening, including various tree species from buried soil seeds and/or dispersed seeds depending surrounding environment. It is considered that the construction factors is minor factor than climate condition because our study includes the sites from Hokkaido to Kagoshima prefecture, mean-while, our result imply that this revegetation method could support the vegetation types depending the regional climate conditions.

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