Beitrag einer termingerecht durchgeführten Kainit-Düngung zur Beikrautregulierung in Winterweizen

Summary

Due to etching effects on broad leafed weeds, fine ground kainite was used for weed
control before synthetic herbicides have become common practice in conventional
farming. According to the organic standards kainite can be used as potassium
fertiliser. The present study investigates optimal growing stages for application in
organic winter wheat and the range of effectiveness. Kainite was applied at a rate of
800 kg per hectare alternatively at EC 29 and EC 30 under the conditions of morning
dew on days with high sunshine duration. At both growing stages kainite application
reduced the population of hairy vetch, chamomile, cornflower, field pansy, winter rape,
common chickweed and persian speedwell. Application at early growing stages led to
a higher weed reduction.