The impact of extensive utilization of meadow in bogy habitats on botanical composition of sward.

During the years 2010-2012 the study was conducted on permanent meadows previously cut two times per season, located in proper moorshed habitat (B1) and re-flooded moorshed habitat (B2). The following treatments were investigated: mowing and harvesting of biomass, mowing and leaving biomass, mowing with cutting and leaving the biomass on surface of meadow and not utilised meadow. It was shown that leaving the mown biomass on meadow sward, regardless of the form, in proper moorshed habitat had no negative impact on the quality of plant communities in the first two years. Only in the third year, the degradation process occurred, resulting in the disappearance of valuable grasses and the development of Urtica dioica L . In the re-flooded moorshed habitat in three years period of study the degradation process of the sward was not observed. The annual increase of valuable grasses, especially Phalaris arundinacea L. was observed. The fodder value of sward, irrespective of the objects, years of study and habitats, was on the lower level of the good quality.