Effects of Electric Current on Breaking Bud Dormancy in Grapes

概要

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Electric current was introduced to scions of two-year-old 'Kyoho' grape vines to determine the effect of direct and alternating current, voltage polarity, duration and time of exposure during dormancy on bud break. The current was introduced by inserting electrodes into pith tissue 30 cm apart. 1. When direct current was introduced to the grape scions during the time of the deepest endodormancy, bud break was markedly hastened. However, alternating current did not have any influence on breaking bud dormancy. 2. Such an effect was more pronounced when the anode of direct current was set to acropetal end of the scion than the other way around. 3. On October 13 and 14, 1983, 60V-24hrs treatment was the most effective and hastened bud break by 22 days when the anode of the current was applied to the acropetal end. However, fresh weight of the shoots treated by either 48 V-16 hrs or 48 V-8 hrs was greater. 4. From October 4, 1986, the current of 60 V-24 hrs was applied to the scions every 4 weeks at 3 different times of dormant stages by setting the anode to the acropetal end. The procedures done on October 4 and November 1 hastened bud break by 40 days, while the one done on November 29 did not have any influences in this respect.
大阪府立大学の論文
1990-03-31