Bicropping-Verfahren von Winterungen (Getreide und Raps) mit Beisaaten abfrierender Körnerleguminosen

Summary

Bicropping systems based on forage legumes undersown in winter cereals can
achieve yield and quality improvements with sufficient water supply during the main
growth phase, but fail under dry site conditions (continental climate, sandy soil). To
improve the N-supply without the risk of interspecific water and nutrient competition,
bicropping systems were developed with simultaneously or parallel intercropped nonhardy
grain legumes at in early sown winter cereals or oil seed rape. They were tested
in practice with on-farm experiments carried out in Brandenburg and Bavaria. Besides
a sufficient erosion protection, a significant N-input can be achieved with grain
legumes in autumn especially within rape and early sown winter cereals. But only
cereals showed a significant increase of yield and quality. Lodging frozen biomass
(e.g. pea) can cause yield losses in rape.