Study on trees transplantation method with reduced crown and root system reduction based on sap flow measurement:

Application to Michelia figo

Abstract

Availabilities of a large root-ball of Michelia figo was investigated with the changes in sap flow and transpiration rate. The heat pulse velocity decreased 21% of previous value with root cutting. However, there were no large differences in the annual maximum value of the velocity for two years. Three years after transplantation, a large root-ball was made for the same tree, and transpiration rate was almost equal to that of the first large root-ball. Furthermore, after downsizing the root-ball, the transpiration rate and showed 45% of decrease. These results suggest that a large root-ball is expected to promote growth.