Natural and usefulness values of meadows of the middle section of the Mogilnica River valley (Poland)
2007
Kryszak, A. | Kryszak, J. | Klarzynska, A.,Akademia Rolnicza, Poznan (Poland). Katedra Lakarstwa
Natural importance and economical and usefulness values (FVS) of meadows situated in the valley of the central Mogilnica River were assessed. The natural value was determined on the basis of: the number of species in a phytosociological releves, phytosociological structure, floristic diversity expressed by the Shannon-Wiener index (H) and the method of plant community valorization according to Oswit. Site conditions: moisture (F), soil reaction (R), soil nitrogen content (N) of the examined meadow communities were evaluated using the Ellenberg phyto-indication. Both natural and usefulness values of the examined communities depend on the place of occurrence in the valley. The communities situated closest to the river, which were assigned to the class of Phragmitetea, developed in their typical forms and presented significant and moderately significant natural values, although their sward was found to be characterized by low usefulness value. Communities growing further from the river, representing the Molinio-Arrhena-theretea class, are utilized at the present time. Grasses found in these communities are of moderate natural importance but the meadows provide high yields of good fodder value
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