BENEFÍCIOS FITOTÉCNICOS EM PLANTAS DE Glycine max TENDO EM VISTA MUDANÇAS NO ESPAÇAMENTO DE PLANTIO

Abstract

The influence of the spatial arrangement is related to the minimization of intraspecific competition and the maximization of the use of environmental resources such as water, light and nutrients. And one of the characteristics presented by soybean plants is their high plasticity, adapting to environmental and management conditions, through morphological changes and yield components. Some results have reported the effects of spacing between rows on the genetic performance of the soybean crop. However, this is still a topic of discussion in the East Goiás region. The present study aimed to evaluate trends and multivariate interrelationships in contrast to the spatial arrangement of soybean plants. The experimental design used was a randomized block with 8 treatments, corresponding to 2 soybean genotypes (Desafio and M7739), submitted to four spacing between rows (22.5, 45, 67.5 and 90 cm). The treatments showed differences in plant stand, yield and number of pods with two grains. The 25 cm spacing between planting lines was promising mainly in the M7739 genotype, not ruling out the Desafio soybean crop. The contribution analysis of the characters reveals that the variables with the greatest weight in the distinction of treatments were plant stand, yield, two-grain vegetables, plant height and three-grain vegetables, totaling 95.27% of the total contributions of treatments. Spacing reduction trends increased soybean crop yield and their more pronounced multivariate interrelationships were reported by the increase in plant stand and number of pods with a grain.