Desempenho de cultivares de soja em latossolos vermelhos com diferentes classes texturais

Abstract

Soybean is considered the main crop in Brazil due to both volume production and income. Many factors have contributed to a good performance of this crop in this country, such as adaptability of cultivars to many regions. The objective of this research was to evaluate soybean performance of early, semi-early and intermediate maturity cultivars in a sandy loam, clayey and very clayey Eutrudox. The experiment was carried out in Naviraí, Mato Grosso do Sul, Brazil, São Francisco Farm, in 2008/2009. The experimental design was the completely randomized block with four replications. The following soybean cultivars were evaluated: a) Early maturity: CD 202, CD 208 and CD 214RR; b) Semi early maturity: BRS 239, BRS CharruaRR and BRS 245RR; and c) Intermediate maturity: CD 219RR and Monsoy 8001. Sowing was conducted over maize residues on November, 15th, 2008 under no tillage system and 333 kg ha-1 of fertilizer was applied. The number of pods per plant, number of grains per pod, weight of 1,000 grains and yield (kg ha-1) were evaluated. Fertilization and maintenance of intermediate-high nutrient levels in Eutrudox soils of any textures provides conditions for soybean cultivars to express high yield potentials.