A dielectric barrier electrode of a uniform AC electric field effect on roselle root length

Abstract

          This paper presents the effect of a uniform alternating current (AC) electric field on average root length of roselles germinating from seeds. The electric field in this experiment is between 0-4 kV/cm, which is generated by a high voltage AC source 0-2.3 kVAC, 50 Hz, which in turn is connected to an electrode plane with a dielectric barrier. The purpose of this experiment was to determine the relationship between uniform AC electric field energy on roselle seeds that were activated by a process over 10, 20 and 30 minutes and based on results of the average root length of the roselle after one week. The results show that when the time increases, it causes a small increase in average root length and then begins to decrease. When an increased electric field affects the result of the average root length, it increases and then begins to decrease. Roselle seeds without the activated process have an average root length of 5.01 cm, while roselle seeds that are activated by an electric field of 3 kV/cm at an activated time of 20 minutes. Roselle seeds with the activated process have the greatest average root length, with 9.07 cm or 79.24%. All of the results contribute to the development of a roselle seed activated device that can be used for the improvement of the roselle planting process in Thailand.