Densidade de Semeadura de Cultivares de Soja e sua Influência na Qualidade Fisiológica de Sementes

Abstract

29 Seed vigor is a subject that have been studied by several authors, is of great 30 importance for the perfomance of the crop. This present work aimed to assess the physiological 31 quality of soybean plantations in different sowing densities. Four soybean plantations were 32 assessed (NA 7337 RR, M 7110 IPRO, BMX Desafio RR e BRS Valiosa RR), which were 33 cultivated in five sowing densities (11, 13, 16, 19 and 21 plants m-1), amounting to 20 treatments. 34 The physiological quality of seeds was assessed by means of a germination test, an emergency test, 35 an accelerated aging test and an electrical conductivity test. The emergency test was conducted and 36 outlined in random blocks, and the other tests were conducted in fully random outlining. It is worth 37 noting that all tests had a factorial design of 5 x 4 (sowing density x plantations), with four 38 repetitions of 50 seeds. Thus, it is possible to conclude that physiological quality is affected density 13 plants m-1 , where there is higher percentage of dead seeds. Seeds cultured in density 21 plants m39 1 40 , have lower dry matter mass of the aerial part.