Biologia plantarum 15:171-178, 1973 | DOI: 10.1007/BF02922390
A new method of sap flow rate determination in trees
- 1 Institute of International Biological Programme at the Department of Forest Botany and Phytoooenology, University of Agriculture, Brno, Czechoslovakia
A new method of sap flow rate determination in stems of adult trees is described in which mass flow (the transpiration flux in the present case) is estimated from a heat-transfer measurement. The device used includes a couple of thermometers in a differential connection and plate electrodes, through which a controlled heat input flows into a denned studied segment of the xylem. The present method was tested first with a laboratory simulating system, then with the stem of a living adult treePrunus avium L. The data are registered continually and automatically; continuous measurement of sap flow rate of long duration with a greater number of trees is thus made possible.
Received: December 23, 1971; Published: May 1, 1973 Show citation
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