Monitoring der Deckungsgrade der Segetalflora auf Flächen des ökologischen Landbaus über einen Zeitraum von 10 Jahren

摘要

The abundance of weeds was monitored on several permanent plots on an organically managed farm in Schleswig-Holstein, Germany. Variation in weed abundance was observed between plots. Neither general increase, nor general decrease in weed abundance could be identified. Most of the annual variations within the data could be explained by annual variation in precipitation. A more intensive view was on the abundance of Cirsium arvense and Galium aparine agg., two problematic weed species. While the known problems arising from the appearance of C. arvense could not be reflected in the used data, the data revealed possible problems through the partly high abundances of G. aparine agg