Variabilidade espacial da qualidade fisiológica de semente de soja

Abstract

Brazil plays a significant role in world soybean production, achieving high yields due to the use of high quality seeds. However, the presence of spatial variations in plantations affects the physiological potential of seeds. The objective of this work was to spatially evaluate the physiological quality of soybean seed. Data were collected at Fazenda Glória, Uberlândia – MG and evaluated at the Federal University of Uberlândia. Seeds were collected at 48 georeferenced points to determine the physiological quality of the seeds and the scope of spatial dependence. The results were submitted to descriptive statistics analysis, Pearson's linear correlation and geostatistics. The physiological quality tests evaluated were germination, emergence, accelerated aging, electrical conductivity, dry matter and tetrazolium. It was possible to observe a positive correlation between the variables germination, emergence and dry matter. Between the electrical conductivity and the other attributes, there was a negative correlation and the tetrazolium attributes also present a negative correlation between them. The physiological quality of seeds, especially in terms of vigor, is not uniform and can be better evaluated using interpolation maps. The adoption of precision agriculture made it possible to identify the spatial distribution of the physiological quality of seeds in a soybean production area, facilitating decision making about the areas that should be harvested.