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Gewählte Master / Diploma Thesis:

Gundula Eibenberger (2004): Regulierung von Rumex obtusifolius L. auf Dauergrünland durch eine zeitlich begrenzte Flächenstilllegung.
Master / Diploma Thesis, BOKU-Universität für Bodenkultur, pp 82. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The infestation of broad-leaved dock, Rumex obtusifolius in modern grassland farming is a serious and widespread problem. The aim of the present study was to examine the abandonment (without harvesting and fertilization) over three years as a possibility to control broad-leaved dock. The abandonment area was compared to a customary cultivated area (three cutting frequencies and slurry fertilisation). The composition of the vegetation changed on the abandonment area. The proportion of grasses increased up to 75 %. Predominating species were Agrostis stolonifera, Alopecurus pratensis, Festuca rubra agg., Poa pratensis and Poa trivialis. The density of the sward and interspecific competition increased, leading to infavourable conditions for dock plants. Therefore, a strong reduction of ground cover of docks could be reached on the abandonment area within three years from 55 % in 2000 to nearly 1 % in 2003. Furthermore, on the abandonment area there was a great accumulation of dock seeds in soil. The number of seed per m2 in 1 - 10 cm depth was ten times higher than those of customary cultivated areas. Nevertheless, there was no correlation between the number of seeds in the soil and the ground cover of docks. It can be concluded that the density of the grassland sward and light competition seem to be the deciding factors of dock infestation. In conclusion, the abandonment can be seen as a possibility to control the spread of broad-leaved dock Rumex obtusifolius in grassland. However, before it is used in practice, more research is needed.

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