This study was undertaken to analyze seed yield, oil and protein contents of four soybean cultivars (BRS 133, BRS 206, BRS 239, and CD 202) harvested in two locations of Mato Grosso do Sul state, Brazil (Sidrolândia and Dourados) and in four periods (R7 and 7, 14, and 21 days after the first period). The crop seasons evaluated corresponded to 2004/2005 and 2005/2006. The experiment was conducted in a randomized complete block design, in a split-plot structure, with three replications. The plots and subplots were constituted of soybean cultivars and harvest periods, respectively. The statistical analysis consisted in analysis of variance, regression analysis and mean testing (Tukey test). Seed yield was measured after maturity of the plants and oil and protein contents were evaluated in both seeds and soybean meal. In the crop season 2004/2005, in both locations, the cultivars BRS 206, BRS 239, and CD 202 showed the largest grain yield. Both oil and protein contents presented low levels that season. In the crop 2005/2006 there were significant differences between locations, Sidrolândia showing better yield than Dourados, for the four cultivars evaluated. BRS 206 cultivar showed the largest protein content, achieving 35%. The lowest protein content was found in cultivar CD 202, with 31%. Cultivar CD 202 showed high seed oil content (22%), while BRS 206 was the cultivar that showed lowest level (18%).
Glycine max (L.) Merrill; productivity; chemical composition; harvest
