Erträge und Nährstoffgehalte von alten, biologisch und konventionell gezüchteten Winterweizensorten in verschiedenen landwirtschaftlichen Systemen

Summary

Due to limited nutrient conditions in organic farming winter wheat cultivars can often
not perform to the full extent of their genetic potential. This study aims to assess
nutrient acquisition potential and yields of old, organically and conventionally bred
winter wheat cultivars. Ten cultivars were tested within the DOK long-term experiment
in two organic systems at low and moderate intensity, a conventional stockless system
and an unfertilized control. Yields and nutrient contents of grain and straw were
significantly affected by cultivars and systems. Cultivar x system interactions were not
detected. Yields were increasing with nutrient level and year of release of cultivars.
Under organic conditions all cultivars performed equally well with respect to yield.
Grain nitrogen content was increasing in line with nitrogen input, but dropping along
year of release of cultivar.