Document Type : Research Paper
Department of Herbology and Plant Cultivation Techniques, University of Life Sciences in Lublin, Poland.
Department of Botany, Ukrainian National Forestry University, 79057 Lviv, Ukraine.
A strict field experiment with crops sown in crop rotation and monoculture was
carried out in the years 1988-2012 at the Experimental Station Uhrusk belonging to
the University of Life Sciences in Lublin, south-eastern Poland. The study was
aimed at evaluating the structure of weed communities occurring in crop rotation
and monoculture of cereals. The highest weed density m-2 was determined in
the second (1992-1996) and the third crop rotation (1997-2000), whereas the
highest weight of weeds was noted in the third crop rotation. Weed community in
cereals sown in crop rotation and monoculture was constituted by species
belonging to 6 syntaxonomic classes: Stellarietea mediae, Artemisietea vulgaris,
Molinio-Arrhenatheretea, Agropyretea intermedio-repentis, Koelerio glaucaeCorynephoretea canescentis and Bidentetea tripartiti.