抄録
Field experiments were conducted on the embankment grassland community at the Ina river in Hyogo
Pref. from 1986 to 1989, to clarify the effects of cutting frequency on growth, floristic composition,
number of species, life-forms and species diversity of the community on the embankment slope. Four
experimental plots, different in cutting frequency, were designated in the community composed of
Miscanthus sinensis, Imperata cylindrica var. koenigii, Zoysia japonic a, Solidago altissima, Artemisia princeps
etc. In the non-cut plot, the community was progressive for the tall grassland community dominated by
Miscanthus sinensis; not only the number of species, but also species diversity, decreased. By contrast, in
the plot that received three cuttings per year, the community was retrogressive for the short grassland
community dominated by Zoysia japonica. In the plots that received one and two cuttings per year, the
main component species was Imperata cylindrica var. koenigii. Seasonal change was distinctly recognized
in the plots that received two and three cuttings, whose spring-early summer aspects were characterized
by winter annual plants and summer-autumn aspects by summer annual plants.
© 1994 兵庫県立人と自然の博物館