Verschiedene Gründüngerpflanzen – Anbaueignung und Unkrautunterdrückung im Direktsaatsystem vor Winterweizen

Summary in the original language of the document

In a small-plot field trial 33 green manure plants (GM) were examined for their ability
to suppress weeds in a no-tillage system. A roll-chopper was used to suppress the
GMs before seeding winter wheat. The success of this organic method to control GMs
was compared to the standard method using a non selective herbicide. Species of the
group brassicaceae, monocotyles and plant mixtures covered the soil faster, produced
more biomass and suppressed weeds more efficiently than species of the group
legumes and dicotyles. In spring, weed infestation in all roll-chopper treatments
always exceeded economic threshold values whereas in the herbicide treatment weed
infestations remained below these values. Additionally, wheat yield and density was
reduced in the roll-chopper treatment compared to the herbicide treatment. Application
of the roll-chopper together with a suitable GM for Swiss growing conditions will have
to be improved before its introduction for no tillage agriculture in organic farming.