Desempenho agronômico de híbridos de milho em resposta a diferentes densidades populacionais

Abstract

Corn is the most cultivated cereal in the world, has high productive potential when submitted to efficient management techniques. The objective of this work was to evaluate the agronomic performance and productivity of corn hybrids in response to population densities. The experiment was installed and conducted between April and July 2018, in an experimental area of the Center for Agrarian Sciences, of the Federal University of Paraíba (CCA/UFPB), in Areia-PB, located in the brejo paraibano microregion. Randomized block design (DBC) was used, with four replicates and six treatments distributed in factorial scheme 2 x 3, resulting from the association of two corn hybrids (H1 and H2) and three population densities (40,000, 60,000 and 80,000 plants ha-1). Morphological and productivity characteristics were evaluated. The data obtained were submitted to ANOVA and the means compared by the Tukey test at 5% probability for hybrid confrontation and regression analysis to verify the effects of plant populations. Productivity was 4,975 kg ha-1 in the population of 40,000 plants ha-1 and 11,060 kg ha-1 in the population of 80,000 plants ha-1. All plant populations studied provided significant increases in final grain yield for the hybrids studied.