Maize nitrogen fertilization in two crop rotation systems under no-till1/Adubação nitrogenada para o milho em dois sistemas de rotação de culturas sob plantio direto

• Published in: Revista Ceres 2013-11, Vol.60 (6), p.852
• Main Authors: Lana, Maria do Carmo, Czycza, Rodrigo Vianei, Rosset, Jean Sérgio, Frandoloso, Jucenei Fernando
• Format: Article
• Language: English
• ISSN: 0034-737X; 2177-3491

The objective of this study was to evaluate split nitrogen (N) fertilization of maize applied in band, at sowing and top dressing with and without crop rotation, under no-till. The experiment was conducted with six N rates at sowing (0, 20, 30, 40, 50 and 60 kg ha^sup -1^) combined with three rates in top dressing (40, 70, 100 kg ha^sup -1^) and two management systems: after five cropping sequences of maize and crop rotation in a randomized block design with four replications. The split of nitrogen fertilization, in rates above 39 and 54 kg ha^sup -1^ at sowing and 70 and 40 kg ha^sup -1^ in top dressing, resulted in yield higher than that obtained with the application of 100 kg ha^sup -1^ in top dressing. Grain yield was higher with the rates 50 and 70 kg ha^sup -1^ of N, compared with that obtained with 20 and 100 kg ha^sup -1^ at sowing and top dressing, respectively.