QUALIDADE FISIOLÓGICA DE SEMENTES DE SOJA DA CULTIVAR CZ58B28IPRO PÓS DESSECAÇÃO EM DIFERENTES ÉPOCAS

Abstract

Desiccation in pre-harvest soybeans is an increasingly viable and routine alternative among producers, despite the risk of compromising the physiological quality of the seed. Thus, the objective of this work was to evaluate the physiological quality of soybean seeds of the cultivar CZ58b28IPRO after drying with different desiccants at the application stage R7 and R8. Different desiccants were used, which were applied 5 to 7 days after reaching the R7 phenological stage (1st season), with 30% of the physiologically mature pods and at the R8 phenological stage (2nd season) with 90% of the pods. mature. The experiment was carried out in a randomized block design in an 8 x 2 factorial scheme (8 desiccation treatments x 2 application times), in 3 replications. And the data were analyzed by Tukey's test at 5% significance. The physiological quality of the seed was evaluated from germination, IVG, vigor, shoot and root length, electrical conductivity, emergence and dry mass tests. In view of the results, it is concluded that the physiological quality of seeds desiccated in R8 was superior to those desiccated in R7.