Yield of 'Kenzan' cabbage was evaluated under plant spacing (80 x 30; 60 x 30 and 40 x 30 cm) and doses of N (0; 75; 150; 225 and 300 kg ha-1). The experiment was conduced in field conditions, using a soil with low N content, from September to December/2002. The experimental design was a completely randomized split-pot scheme and four replicates, where the factors spacing and doses of N were in the plot and split-plot, respectively. The doses of N were applied using 20% of the total in the transplant and 20% at 20 days after the transplant (DAT) and 30% at 35 and 50 DAT. Harvest began 65 DAT and extended to 83 DAT. Production of fresh mass of head/area, mass fresh average weight of head, leaf area of external leaves, leaf area index, harvest precocity and liquid income were evaluated. Increasing the doses of N resulted in an increase of all the appraised characteristics. Reduction of spacing resulted in a decrease of the mass fresh average of head, leaf area of the external and crop precocity. Considering the production of fresh mass of head/area, the mass fresh average of head adapted to the demands of the market and of the Brazilian consumers and liquid income, the spacing of 40 x 30 cm and the dose of 253 kg ha-1 of N proved to be the most suitable for the cultivation of the cabbage in spring conditions.
Brassica oleracea var. capitata; population; nitrogen fertilization; yield
