Corona discharge on coniferous trees - spruce and pine

We study an atmospheric corona discharge on plants and trees, because these discharges carl be connected With sterilization and stimulation of biologi cal objects and with the transfer of electrical charge to the Earth. It is shown that the form of current-voltage characteristics depends on the type of plant or tree. We report the measurement of characteristics on coniferou s: trees spruce and pine, and analyse results for single-needle and multine edle system of electrodes. The differences can depend on the composition of the surrounding atmosphere, different ionization mechanism and phenologica l phases of the trees.