Förderung der Mulchsaat im Ökolandbau - das Auflaufverhalten von Zwischenfrüchten

Summary

The several advantages of conservation tillage systems are interesting for organic
farmers too. The positive effects concerning the reduction of soil erosion are well
known and documented. The more residues are left on the soil surface the higher
reduction of soil erosion is achieved. Nevertheless the plough is still the main tillage
equipment in organic agriculture systems. A first step towards conservation tillage
might be the tillage before intercrops. In a three years project the relationship of
emergence rate from straw quantity, working depth and residue cover is investigated.
Thick mulch layers have negative effects on the emergence rate of the followed crop.
Modern machinery for conservation tillage improve the incorporation of crop residues
which effects the residue cover after tillage. Especially at deep working depth (above
13 cm) the benchmark of 30% residues cover can’t be achieved any more. The results
of the trials support the conservation tillage system before intercrops.