Residual nitrogen fertilization effect of common bean production on succeeding corn intercropped with Congo grass

Resumen

Crop production in conservation systems involving intercropped cultivations mainly with corn have been proposed
as a technology to promote sustainability in the Brazilian Cerrado areas. The objective of this work was to evaluate the
influence of residual nitrogen fertilization applied in common bean on subsequent corn sole or intercropped with
Congo grass (Urochloa ruziziensis) in no-tillage system. The experiment was carried out in randomized blocks with
three replicates in a split-plot design. The treatments were composed by two cropping systems (sole and intercropped
with Congo grass), and the sub-plots were five doses of nitrogen (0; 40; 80; 120 and 160 kg of N ha-1), applied in
topdressing on common-bean (previous crop). There was no effect of cropping systems and residual amount of
nitrogen application in the vegetative and reproductive development of corn. Corn intercropped with Congo grass
leaded an adequate formation of crop residue and total land covering target at sustainability of no-tillage system.