Qualidade de sementes de soja em zonas de manejo com diferente potencial produtivo

Abstract

Brazil is an important soybean producer in the world with yelds associated with the use of high quality seeds. However, the existence of spatial variability in crops interferes with the physiological potential of seeds. The objective of this work was to create management zones and define them based on seed quality, evaluating the interaction of plant population and areas of different potential in the final quality of stored soybean seeds. Data were collected at Fazenda Eldorado, Uberlândia - MG and taken at the Federal University of Uberlândia. Altitude, soil electrical conductivity, clay, cation exchange capacity and soil organic matter data were collected. From them, and with the aid of cluster analysis using Fuzzy logic, an area differentiated into two management zones (ZM), with high and low potential. For each one, experimental plots with populations of 230, 280 and 330 thousand plants ha-1 and three replications were common. The ZM were validated according to the physiological quality of the seeds, based on germination potential, vigor and emergence. From the data obtained in the physiological quality tests of the seeds, it was possible to determine which zones of high potential are seeds of greater physiological quality, especially in the population density of 330 thousand plants ha-1. In low potential zones, seeds can have better physiological quality when adjusted for population density, reducing competition between plants.