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

Abstract

The plants arrangement is a management practice that has been studied over the years and have, in soybean, association with the spatial distribution modification and the yield increase per area. The spacing reduction is another practice used to search arrangements that allow less competition between plants. Thus, the objective of this work is to verify the influence of two spacings (25 and 50 cm) on two soybean varieties on the crop agronomic performance. The work was carried out in the field at the Research Station GAPES (Associated Research Group of Southwest Goiano) in the summer harvest 2017/2018. The study was conducted in a randomized block design with 4 replications. The spatial arrangements of plants were traditional (0.5 m between rows) and denser (0.25 m between rows). The cultivars M7110 IPRO and Desafio RR were used. The characteristics that were evaluated were: agronomic characteristics, insertion height of the first pod, internodes number per plant, branches number per plant, pod number per plant, 1000 grains weight and productivity. With the results it was verified that cultivars average values of branches number per plant revealed a significant difference. The mean values of pods numbers with two (02) and one (01) grains per plant showed a significant difference between the cultivars. In the productivity characteristic, no significant results were observed to 0.25 m or 0.50 m spacing between rows in any of the two cultivars studied (M7110 IPRO and RR Challenge).