Abstract

tree growth and secure resources for sap by sap collection of Acer mono. The amounts of sap collected by taping size of 12 mm, 10 mm and 8 mm was 189 L, 140 L and 193 L, respectively. Fusion rates by tapping size were 100% for 8 mm, 89% for 10 mm and 85% for 12 m, respectively. Amount of sap by size and number of tapping were much at three, two and three tappings to small, middle and large diameter tree in case of 8 mm tapping, and it was large in quantity at two tappings of 12 mm tapping to large diameter tree, res-pectively. Trees tapped from one to three tappings of 8 mm size for small diameter tree with treatment of DB ointment (mixture of thiophane ointment and 2% bamboo charcoal powder) were completely filled up within 6 tappings and 0.47 mm for three tappings to small, midle and large diameter tree, respectively. In case of 12 m tapping size, diameter growth was fast in the order of large (0.55 mm), middle (0.30 mm) and small (0.23 m) diameter tree, respectively.