Umidade e ambiente de armazenamento na qualidade de sementes de soja

Abstract

Seed quality is an important factor for the success of soybean crops, with storage having an important role in this process, which aims to preserve the viability of the seeds until the future harvest. However, seed moisture can cause disturbances during storage, influencing its physiological quality. In this sense, the objective of this work was to evaluate the effect of humidity and storage temperature on the quality of soybean seeds. The experiment was carried out under a 4 x 2 bifactorial arrangement (two environments and four different water contents), with four replications, distributed in a completely randomized design. The seeds were stored for 32 days in preestablished environments (average ambient temperature of 17ºC and a cold chamber of 10ºC). After this period, germination (first count at five days, and final count at eight days), accelerated aging, seedling length, and dry mass were evaluated. The data were submitted to the Lilliefors normality test and the Bartllet test to verify the homogeneity of the variance at 5%, and subsequent Tukey average test at 5% of error probability for qualitative analysis and when interaction between the factors was verified, and the significance of the quantitative factor, regression analysis was performed. There was no interaction between the water content and seed storage environment factors, but there is superiority in seeds stored in a cold chamber environment, since the with the highest water content have the greatest loss of vigor.