高速道路のり面の植生遷移について(V)―九州縦貫自動車道ののり面植生の遷移―

概要

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This study is a series to analyse the succession of slope vegetation of express-ways. In this paper the author made a case study on Kyushu expressway (139.9km), where had not been studied at all. Selection of locations or stands for sampling was done regularly in each kilometric post. Size of sampling area was about 50-100m2, where is enough area for the sampling plot of grassland and scrub communities. In early days, 2 to 7 years after construction, the dominant species of slope vegetation are Eragrostis curvula and Festuca arundinacea, which were seeded at the time of road construction, but thesespecies are taken the place by Miscanthus sinensis, Solidago altissima and Pueraria lobata 8 to 10 years after construction. The relationship between succession and site factors is important for the planning and control of slope vegetation. There are many site factors concerning with the progression of succession. Land use, vegetation and topography adjoining road and distance between road and forest are the factors for the supply resource of seed into slopes. Form of slope, cutting and embankment, and length of slope are the factors for the growth of slope vegetation.
信州大学農学部の論文
1981-12-25