O REVESTIMENTO EM SEMENTES DE Urochloa brizantha ALTERA A QUALIDADE FISIOLÓGICA E AS IMAGENS RADIOGRÁFICAS PODEM SER USADAS COMO ÍNDICE DE QUALIDADE?

Abstract

Brazil is the largest producer, consumer, and exporter of forage species seeds in the world. With the growing demand for high quality seeds, it is essential to use methods that ensure the good development of seeds under the most varied conditions. Among these methods, the seed coating technique stands out, this practice consists of forming a film around the seed, through the aggregation of materials. The objective was to evaluate the physiological quality of coated and uncoated Urochloa brizantha (cv. Piatã) seeds, sown at different depths, in addition to evaluating the physiological quality, as well as of brachiaria seeds using automated X-ray image analysis methods. , comparing with germination and anatomical characterization, with the purpose of selecting seed lots quickly and effectively. For this, the emergence speed index, root green mass, root dry mass, shoot green mass, shoot dry mass, shoot length, and root length, anatomical characterizations, and chlorophyll a fluorescence were evaluated. Therefore, in this study we discovered the importance of considering both seed depth and coating when sowing these species, since both coating and sowing depth can negatively affect the seed physiological quality.