Abstract:The rule of apple trees transpiration and its relation to the micrometeorology on the canopy were analyzed through the experimental data of the apple tree sap flow and canopy micrometeorology, which measured by Thermal Dissipation sap flow velocity Probe (TDP) and CR10X automated meteorology system respectively, and data were recorded very 10minutes.The trees are 10 years old. The experiment was conducted in the hilly region of Taihang Mountain during Jan-Dec of 2003. The aim of this study is to provide es...