Revisiting the Heat Field Deformation (HFD) method for measuring sap flow

Evaluation of the heat pulse velocity method for measuring sap flow in Pinus patula

Information on the water use of Pinus patula plantations is required to predict the impact of forest plantations on water resources in South Africa. The heat pulse velocity (HPV) method is a promising technique for measuring water use by trees, and has been shown to measure sap flows accurately in a variety of hardwood trees. This method has not been sufficiently verified for pine trees where t...

On the heat impulse method for deducing sap flow

Measuring the Sap Flow of Eucalyptus Trees

We describe the design and implementation of Savia, a sensor network system for measuring the sap flow of eucalyptus trees. Unlike prior sensor network systems, which generally take a vertically integrated approach and build everything from scratch, Savia is built out of several existing sensor systems. The difficulties we encountered when combining these systems demonstrate why a vertically in...

Calibra Ting the Compensa Tion Heat -pulse Technique for Measuring Sap Flow in Olive

The compensation heat-pulse method, a technique for measuring sap f10w in plants, was caJibrated for the olive tree. Two calibration experiments were carried out, the excision and the perfusion experiments. A device was designed in our laboratory for the perfusion experiment, which allowed us to calibrate the technique for a range of 0.5 L h O ' to 14 L h" '. The correction factors given by Gre...

Thermal methods for measuring the sap flow of common camellia

Hardy plants can maintain their normal physiological metabolism in cold winter and against the cold weather by regulating themselves. Around this natural phenomenon, a large number of researchers conducted researches on cold resistance of hardy plants and the mechanism of cold resistance respectively from the point of cell membrane structure and characteristics, physiological metabolism, growth...