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

Abstract

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.

Cultivo De Milho Em Sistema De Plantio Direto Em Pastagem Inoculada Com Azospirillum Brasilense

“…Em trabalhos em que se avaliou o efeito da adubação nitrogenada residual sobre o milho, Carmeis Filho et al (2016), não encontraram efeito das doses sobre as características do milho. Estes autores atribuem que o N aplicado durante o ciclo do milho minimizou o efeito do N residual sobre as plantas, também pela redução das perdas inorgânicas de N por processos naturais, minimizados pela prática de plantio direto.…”