Sowing date and soybean maturity group effects on soybean-corn succession

Abstract

This study evaluated the effects of sowing dates and maturation group of soybean on soybean-corn succession in the Southwestern of Paraná state, Brazil, at the 2016/17 and 2017/18 growing season. Experiment was laid out as a randomized complete block design in a 3×3 factorial scheme with three replications, being factor A three soybean cultivars with different maturation group and factor B three soybean sowing dates. Corn sowing periods (nine at total) was a consequence of the soybean harvest date. Soybean cultivars with a maturation cycle between 5.1 and 5.3 sowed in mid-September resulted in better corn performance, but worse technical feasibility for the soybean-maize succession in relation to its sowing on the beginning of October, which results in better total grain yield. Soybean cultivar with maturity group 6.0 was a good option for the mid-September sowing. Soybean sowing in mid-October did not increase its yield and reduce the corn yield.