Influência do vigor de sementes na produção e na qualidade de sementes de soja

Abstract

The seed quality is a fundamental factor for the success of soybean crop, because high quality seed is an important tool for the success of a crop, by providing fast and uniform growth of the plant stand. The objective of this work was to evaluate the influence of the physiological quality of the seeds on the yield components and in the quality of soybean seeds. The seeds production occurred in the Fazenda Experimental de Ciências Agrárias, in Dourados-MS, on distroferric Red Latosol, 2019/2020 crop. The experiments were conducted in a randomized block design, in three repetitions as sowing of soybean seeds cv. M 6410 IPRO characterized with three vigor levels: high (>85%), low (<70%) and intermediate vigor (>75% <85%). In order to evaluate the effect of seeds vigor in the crop establishment, the number and height of emerged seedlings at VE and VC phenological stages were determined. At the end of the crop cycle, the yield components (height of the first pod insertion, number of branches per plant, plant height, number of seeds per pod and number of seeds per plant) were determined. After harvest, the seeds produced from each treatment were taken to the Seed Technology Laboratory of FCA-UFGD and submitted to germination and vigor tests, in four repetitions. According to the results, the initial quality of the soybean seeds did not affect yield crop, but the seed lots of high vigor is an important initiative towards successful soybean crop establishment. In relation to the quality of the seeds produced from each treatment, there was no significant difference in the seed germination, however the seed lots of high vigor produced seeds with high physiological potential determined through field emergence and seedling length.