Biodiversity of weed flora in sugar beet

摘要

In 2004-2008 at the Research and Education Center Brody weed community in sugar beet was analysed, using the Braun-Blanquet method, constancy and cover coefficients of species, the diversity of species indicators (by Simpson and Shannon-Wiener), and Margalef index. In the individual years the biodiversity of weed flora in sugar beet showed slight differences in contrast to the intensity of occurrence of weed species. Weed community classified as the Polygono-Chenopodion, accompanying group was represented by the species: Lamium purpureum, Euphorbia helioscopia, Veronica perlica, Fumaria officinalis and Aperion spicae-venti with Apera spica-venti and Veronica hederifolia orders Polygono-Chenopodietalia, Polygonion avicularis and Centauretalia cyani.Occuring weed species belonged to three classes: Stellarietea mediae, Artemisietea vulgaris and Agropyretea intermedio-repentis. There were from 9 to 20 species of weeds in sugar beet, and the indexes: Margalef ranged from 1.3 to 1.7, Simpson from 0.5 to0.7 and Shanonn-Wienerfrom 1.3 to 2.8.