Zbiorowiska segetalne na glebach rędzinowych w okolicach Sieradza [Segetal communities on rendzina soils near Sieradz]

Abstract

In the years 1973–1978 floristic and phytosociological investigations were performed on field cultures on rendzina soils near Sieradz, by the middle part of the Warta river. The mosaic character of the soil of the investigated area on which segetal communities had developed and the continuous interference of a man (an anthropogenic factor) cause a large diversity in the examined area. Altogether in grain and root crop cultures there were distinguished 5 associations, 6 communities and many lower phytosociological units (subcommunities, facies and degree of moisture). Among the distinguished units of vegetation Caucalido-Scandicetum and communities with intermediate structure deserve particular attention. The association has an impoverished structure, only partly developed, which is probably due to the northern limit of the range of occurrence, habitat conditions (mainly edaphic) and the level of agriculture.