This work had the aim of evaluating responses of five corn cultivars to three sowing densities, fertilized with two fertilizer doses, in Lavras, MG, Brazil. Four experiments were carried out, being two in 2004 and two in 2005. Five cultivars (GNZ2005, AG9010, P3041, AG7000, and DKB350) were grown at three sowing densities (45,000; 55,000, and 65,000 plants ha-1) and in a fertilizer dose (high dose - 400 kg ha-1 of 08-28-16 + 0.5% Zn, and 90 kg ha-1 N in top dressing or in lower doses - 200 kg ha-1 of 08-28-16 + 0.5% Zn, and 45 kg ha-1 N in top dressing) in each experiment. The experimental design was a randomized block in a factorial scheme with three replications. Higher grain yield was promoted by 55,000 plants ha-1 when compared to the other densities; high rates of fertilizers did not promote increase in corn grain yield; the DKB 350, AG 9010, and AG 7000 cultivars showed better performance when compared to the other cultivars tested. Performances of all cultivars were similar regarding the rates of fertilizers and densities, with differences among growing seasons.
Zea mays; fertilization; plant population
