Produtividade e componentes de rendimento de híbridos de milho em função da distribuição espacial na linha de semeadura

Abstract

Spatial uniformity in the distance between plants in the sowing line and at the time of emergence is essential to achieve high productive ceilings in the corn crop. The objective was to evaluate the productivity of two corn hybrids as a function of the spatial distribution in the sowing line. The experiment was carried out in the municipality of Cambé-PR in the second corn harvest in 2016. The hybrids of Formula TL (Syngenta) and 2A401 Pw (Dow) were evaluated. The experimental design used was in randomized blocks with four replications. The experimental unit consisted of four lines of six meters in length and 0.70 m of line spacing. Five treatments (1, 2, 3, 4 and 5 grouped plants) were performed, characterized by the spatial distribution in the sowing line.The data were subjected to analysis of variance by the F test, using the SISVAR software and the comparison of means was performed by the Tukey test. There is genetic variability for grain yield in terms of plant distribution in the sowing line. In the broken plants component, the two hybrids studied presented similar percentages, and more pronounced differences in the variable bedded plants. The Formula hybrid was able to compensate for the spaces left by the unevenness in the seeding line.