Densidade de semeadura e características agronômicas de três cultivares de soja em Dourados - MS

Abstract

The aim of this study was to evaluate the behavior of soybean cultivars when grown in different densities in the row. The trial was conducted in the municipality of Dourados – MS in agricultural year 2014/2015 with three semi-determined growth habit cultivars: TMG 7060 IPRO, TMG 7062 IPRO e TMG 7262 RR on 8, 12, 16 and 20 seeds density on the row. The experimental design was randomized blocks with 12 treatments arranged in subdivided plots, represented by cultivars in the plot and plant densities in the subplots in four replications. Plant height, first pod height, number of branches per plant, number of pods per plant, weight of 1000 seeds and productivity were evaluated. The different sowing densities studied did not influence plant height. The number of branches and pods in all cultivars decreased with the increase of sowing density; the 1000 grains mass increased. The first pod height insertion of the cultivars TMG IPRO 7060 and 7062 IPRO TMG was higher when the sowing density was increased. The highest yield of the cultivar TMG 7062 IPRO was achieved with 12 and 16 seeds m-1, while the treatments with lower densities provided greater productivity to grow TMG 7060 IPRO and lower productivity to grow TMG 7262 RR.