Space between lines and nitrogen fertilizer in corn culture - DOI: 10.4025/actasciagron.v29i4.415

Abstract

The aim of this work was to evaluate the effect of nitrogen application mode and spacing on corn culture. The study was carried out in 2003/04 agricultural years, at the Experimental Station of Coimbra – UFV. The experiment was installed in a complete randomised block design. Treatments were arranged in a 3 x 3 x 2 factorial scheme with four replicates (three cultivates - UFVM 100, AG 9010 and AG 1051; three nitrogen application modes - 0, 120 kg ha^-1 of N in planting and 30 kg ha^-1 at sowing + 90 kg ha^-1 at four fully expanded leaves; and two plant spacing – 1.0 and 0.5 m). Either at sowing or parcel out, the nitrogen application increased the plant height in all plant spacing used; the spacing reduction, from 1.0 m to 0.50 m, provided an increase of 8% in grains productivity; the 120 kg ha^-1 nitrogen application, either at sowing or divided in two modes (30 kg ha^-1 at sowing and 90 kg ha^-1 at four fully expanded leaves), did not show any effect on the characteristics evaluated.