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KMID : 0903619680040010015
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Journal of the Korean Society for Horticultural Science
1968 Volume.4 No. 1 p.15 ~ p.21
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Influence of the Translocation of Stored Nutrition in Canes on the Shoot Growing , Flowering and Fruitage in Campbell Early Vitis Labrusca
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Abstract
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1. The content of reducing sugar of the debuded mother branches with fruiting vine of Campbell Early grape variety is high at such low temperatures as occur about the midle of February, and rapidly decreases after sprouting period.
2. The content of reducing sugar in winter buds is minimum in mid-February, and it comes to the maximum point in the sprouting period, and rapidly decreases as the shoots elongate.
3. After dormancy, about the middle of February, the activity of amylase in winter cane is high, and it becomes lower as the temperature increases, and it is directly proportional to the increment and decrement of the reducing sugar production in grape cane.
4. The growth of the basic subbud in the plot of debuded-long pruned is better than that of the basic subbud in the plot of short pruned.
5. There are no significant differences among the treatments with Boric acid, Urea, Atonik and pinching in percentage of the germination of pollen grain, but there are significant differences between debuded-long pruning and short pruning.
6. Debuded-longpruning is effective for increasing fruit setting and the average weight of grape bunches and the treatments with Boric acid, Urea and pinching raise the average weight of grape bunches compared to non-treatment.
7. In Campbell Early grape variety, cultured by Wakeman system, it is most effective for increasing the percentage of fruit setting and the weight of grape bunches to take debuded-long pruning on Feb. 15, and to make leaf sprays of 1% urea twice before flowering.
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