Nitrogen fertilization on agronomic performance of winter common beans in succession the summer grasses

Abstract

The aim of this work was to evaluate the residual effect of crop residues inoculation of Azospirillum brasilense in mayse and, or Urochloa ruziziensis, associated N rates in coverage in the winter common bean inoculated with Rhizobium tropici. The experimental design was randomized blocks in a factorial design (8x4) with the treatments constituted by the combination of crop residues of corn and / or Urochloa ruziziensis inoculated or not with Azospirillum brasilense and sources of nitrogen (0, 40, 80 and 120 kg ha^-1), with four replicates. It was concluded that the inoculation of Azospirillum brasilense increases the dry mass of maize plants compared to treatment without inoculation; the consortium with Urochloa ruziziensis provides greater production of plant cover; bean productivity is influenced by the preceding crop, especially in succession to those inoculated with Azospirillum brasilense; the application of 60 kg ha^-1 nitrogen in coverage interfere in the winter bean productivity and inoculation with Rhizobium tropici  in total area contributes to better nutrition of bean plants.