SYNANTHROPIC FLORA OF STRAWBERRY PLANTATIONS AND THEIR SURROUNDINGS

Research on synanthropic flora was conducted on the strawberry plantations in Central Poland (surroundings of Skierniewice). In 2007-2010, 104 phytosociological releves were taken on plantations – in herbicide fallow, tillage places, and mulched places. The same number of releves was taken in surroundings of plantations – trodden and rutty places and roadsides. In the plantations examined, the occurrence of 127 species belonging to 30 botanical families was noted, out of which Asteraceae (17%), Poaceae (15%), Brassicacea (11%), Fabaceae (9%) and Polygonaceae (8%) were represented most numerously. 61% of species found in the plantations occurred occasionally or rarely. 21%, among others Equisetum arvense, Polygonum aviculare, Chenopodium album, Amaranthus retroflexus, Stellaria media, Capsella bursapastoris, Geranium pusillum, Convolvulus arvensis, Viola arvensis, Galinsoga parviflora, Cirsium arvense, Taraxacum officinale, Poa annua, Echinochloa crus-galli, occurred frequently or very frequently in the herbicide fallow and tillage places. They were recognised as the most significant strawberry weeds. The most numerous group in the plantations constituted of therophytes (64%), which predominated over hemicryptophytes (20%) and geophytes (11%). Apophytes – native species (48%) predominated over archeophytes (39%) and kenophytes (9%). Within the vascular flora of the plantations examined, segetal species (43%), ruderal species (20%) and meadow species (14%) were predominant. Among the 48 species noted in the plantation surroundings therophytes (48%) predominated over hemicryptophytes (35%) and geophytes (13%). In trodden and rutty places and roadsides, apophytes (60%) predominated over archeophytes (25%) and kenophytes (15%). Ruderal species (50%) were more numerous than meadow species (15%) and segetal species (8%).