Determinantii ecologici ai florei pajistilor permanente situate pe terenuri cu soluri brune acide.
1994
Taina S. | Zota M.
Almost 190 sites (brown acid soil profiles and geobotanical reviews) from different regions of the Romanian Carpathian mountains were studied. The aim was to find those biotop properties which have a determinative role in plant association composition; these are: - exchangeable aluminium, base saturation degree, pH and texture in A horizon of the soil; - cryptospodic and lithiotic soil subtype and depth of R horizon. Different levels of these factors determine the following plant association: - of Agrostis rupestris, Nardus stricta, Festuca ovina ssp. sudetica, with Ligusticum muttelima, Anthxanthum odoratum, Potentilla ternata etc., for 10 me or more exchangeable aluminium/100g soil; - of Nardus stricta, Festuca ovina, Agrostis tenuis, with Potentilla ternata, Anthoxanthum odoratum, Agrostis rupestris, Vaccinum myrtillus, Geum montanum etc., for a content of exchangeable aluminium ranging between 4 and 6 me/100 g soil; - of Nardus stricta, Agrostis tenuis, Festuca rubra, with Potentilla ternata, Anthoxanthum odoratum, Geum montanum, Vaccinium myrtillus etc., for the cryptospodic subtype; - of Festuca rubra, Nardus stricta, Agrostis tenuis, with Trifolium repens, Anthoxanthum odoratum, Alchemilla vulgaris, Potentilla erecta etc., for a base saturation degree ranging between 15 per cent and 25 per cent; - of Agrostis tenuis and Festuca rubra with Trifolium repens, Nardus stricta etc., for a pH level more than 5.8.
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