Abstract
Japanese grape growers devide the grape canes morphologically into two types; Karizuru and Dobuzuru. The karizuru is cylindrical, shallow trenched on canaliculated side, high noded with large buds leaves and tendrils, somewhat distinctly zigzag shaped, clearly striped, deeply colored, smooth with much bloom and hard in texture. The dobuzuru on the contrary is flattish, deep trenched on canaliculated side, low noded with comparatively small leaves, straight shaped, vaugely striped, of rough surface, palely colored without any bloom, soft in texture and possessing very small and slender tendrils. With the vinifera of weak productivity the dobuzuru produces little or no crop. Sultanina and Monukka in Japan produce easily this type of cane. Chemical analysis showed that in the dobuzuru at the begining of its maturity 9.6% easily hydrolizable carbohydrate and 0.7% total nitrogen were found while in the karizuru 12% easily hydrolizable carbohydrate and 0.9% total nitrogen. With Bellino karizuru produced 86% fruitful bud, however, dobuzuru gave 16% only. With Sultanina the tendency is more remarkable; zero percent on the dobuzuru and 5% on the karizuru. Dobuzuru has lower resistance against cold and whenused as scion, it tends to continue its quality and when used as cutting, the rooting capacity is found very poor.
