RENDIMENTO AGRONÔMICO DE DUAS VARIEDADES DE SOJA SOB ESPAÇAMENTOS DE 0,25 e 0,50 m.

Abstract

Plant spacing is a management practice that has been studied over the years and has been shown to be associated in soybean with the modification of spatial distribution and increase in yield per area. Reduction of spacing is another practice used in the search for arrangements that provide less competition between plants. Thus, the objective of this study was to evaluate the agronomic performance of soybean cultivars M 7110 IPRO and Desafio RR sowed in the 0.25 and 0.50 m spacing. The work was carried out in the field at the Research Station CIT-GAPES (Associated Research Group of Southwest Goiano) in the 2017/2018 summer season. The conduction was in a randomized block design with four replications. The spatial arrangements of plants were traditional (0.50 m between rows) and thickened (0.25 m between rows). M 7110 IPRO and RR Challenge cultivars were used. The characteristics evaluated were: height of first pod insertion, number of internodes per plant, number of branches per plant, amount of pod per plant, weight of one thousand grains and grain yield. It was found that the number of branches per plant of the cultivars revealed significant difference. Regarding yield, no significant differences were identified for either soybean varieties (M 7110 IPRO and BMX Challenge RR) and for any spacing (0.25 and 0.50 m). The 0.50 m spacing can be used for any of the soybean varieties (M 7110 IPRO and BMX Desafio RR), as it assists in the optimization of soybean cultivation processes in the southwest region of Goiás.