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• Comparative study of loess steppe pastures with/without domination of bluegrass (Bothriochloa ischaemum)

  55-61

  Istvan Szabo

  Vilmos Kercsmar

  Eva Harsvolgyine Szonyi

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  There have been floristical and plant sociological investigations carried out for several years in Jaba river valley (Somogy county, Hungary) regarding typical and degraded Salvio- Festucetum rupicolae loess steppe community. Bluestem (Bothriochloa ischaemum) is becoming dominant species of grassland due to disturbance and the alteration of sheep-walk usage. Phytosociological records and harvest sampling have been used for comparative study of typical and Bothriochloa grass dominated derivatives by randomly spotted quadrats. The naturalness and quality (hay-) value for the typical and phytomass for Bothriochloa type showed a higher grade. The Sørensen index of similarity was lower then expected for the floristical relationship of the investigated vegetation types.