Metodologia do teste de condutividade elétrica para sementes de sorgo granifero

Abstract

The electrical conductivity of the seed imbibition solution is a recommended for evaluating seed vigor, but it can be influenced by a number of variables that make it difficult to standardize, as it has been verified for sorghum culture. The objective of this study was to evaluate the effect of temperature, water volume and imbibition time on standardization of the electric conduction test for sorghum seeds. The immersion process was carried out by immersing the seeds in plastic containers, filled with 25 and 50 ml of distilled water and placed in BOD chambers with a temperature set in 20, 25 and 30 ° C being performed as a review of the EC in the following imbibition times: 2, 4, 8, 16, 20 and 24. The experiment was designed in a 3x6x2 sub-subdivision compartment scheme with five replications of 50 seeds per sample. The results showed that the increase in time and temperature caused an increase in EC values. A temperature affected by the electrical conductivity systems and the best results were obtained at 25 and 30 ° C. As seeds imbibed in 25 mL showed higher values of electrical conductivity independent of temperature for all time periods. It was concluded with a temperature of 25 and 30 ° C for 20 and 24 hours without volume of 25mL as ideal combinations for the electric conduction test in seeds of sorghum