COMPORTAMENTO DE CULTIVARES DE SOJA EM DIFERENTES DENSIDADES DE SEMEADURA

Abstract

The aim of this study was to evaluate how soybean cultivars with different growth habits respond to variations in sowing density. The experiment was carried in the experimental area of the Goiás Federal Institute of Education, Science and Technology, Campus Morrinhos. It was used the design of randomized blocks with twenty treatments in a factorial 5 x 4, with four replications. Treatments were formed by the combination of five populational densities (11, 13, 16, 19 and 21 plants m-1) and four soybean cultivars (NA 7337 RR, M 7110 IPRO, BMX Challenge RR and BRS Valuable RR). The parameters evaluated were: plant height, stem diameter, number of nodes plant-1

, number of branches plant-1 ,

insertion height of first pod, number of pods plant-1

, number of seeds pod-1

, number of seeds

plant-1 , weight of 1000 seeds and seed yield ha-1

. Data were submitted to analysis of variance by F test at 5% error probability, through ASSISTAT software. There was no interaction between cultivars and densities, showing that cultivars with different growth habits respond equally for variations in plant density. The seeding density of 21 plants m -1 or 420.000 plants

ha-1 provides the greatest productivity.