Biologia Plantarum

, Volume 15, Issue 3, pp 171–178 | Cite as

A new method of sap flow rate determination in trees

  • J. Čermák
  • M. Deml
  • M. Penka


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.


Heat Loss Heat Input Secondary Xylem Plate Electrode Electrical Output 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Metoda stanovenÍ vedenÍ vody u dřevin


Byla navržena nová metoda stanovenÍ vedenÍ vody v kmeni adultnÍch stromÜ, založená na principu mčřeni hmotného toku (transpiraeniho proudu) na základĚ prenosu tepla. ZařÍzčnÍ se skládá z dvojice diferenciálnč zapojených teplomčrů a deskových elektrod, kterými je přiváděn kontrolovaný tepelný výkon do zkoumané části aktivnÍho xylemu (definovaného segmentu), Navrženà metoda byla vyzkoušena na simulátoru v laboratornÍch podminkàch a na kmeni živého adultnÍho stromuPrunus avium L. Data jsou plnč automaticky a kontinuálnč registre-vána: to umožňuje kontinuámÍ sledovànÍ intensity transpiračnÍho proudu po dlouhá časová údobÍ simultánč u vĚtšÍho počtu stromů.


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  1. Closs, B. L.: The heat pulse method for measuring rate of sap flow in a plant stem. - New Zeal. J. Sci.1: 281–288, 1957.Google Scholar
  2. Daum, C. R.: A method for determining water transport in trees. - Ecology 48: 425–431, 1967.CrossRefGoogle Scholar
  3. Doley, D., Grieve, B. J.: Measurements of sap-flow in a Euoalypt by thermoelectric methods. - Aust. Forest Res.2: 3, 1966.Google Scholar
  4. Huber, B.: Beobachtung und Messung pflanzlicher Saftströme. - Ber. deut. bot. Ges. 50: 89–109, 1932.Google Scholar
  5. Ittner, E.: Der Tagesgang der Geschwindigkeit des Transpirationsstromes in Stamen einer 75-jährigen Fichte. - Oecol. Plant.3: 177–183, 1968.Google Scholar
  6. Kabmanov, V. G., Byabova, E. P.: [Apparatus for recording relative changes in water flow rate in a plant]. In Buss. - Sbornik Trud. agron. Fiz.16: 81–87, 1968.Google Scholar
  7. Kitching, B.: Investigating moisture stress in trees by an electrical resistance method. - Forest. Sci.12: 193–197, 1966.Google Scholar
  8. Kosmin, P. L., Filippov, P. L.: [The use of ultrahigh frequencies in determination of moisture in leaves and stems without contacts.] In Kuss. - Fiziol. Bast.15: 177–181, 1968.Google Scholar
  9. Ladefoged, K.: Transpiration of forest trees in closed stands. - Physiol. Plant.16: 378, 1963.CrossRefGoogle Scholar
  10. Lange, O. L.: Modern methods for measuring photosynthesis and transpiration of plants in the field. - Schriftreihe forstl. Fak. Univ. Göttingen33: 91–102, 163/1965.Google Scholar
  11. Leyton, L.: Continuous recording of sap flow rates in tree stems. - Proc. 14th IUFBO-Congres, Munich, Pt. I, Sect.11: 240–251, 1967.Google Scholar
  12. Mabshall, D. C.: Measurement of sap flow in conifers by heat transport. - Plant Physiol.33:385–396,1958.CrossRefGoogle Scholar
  13. Owston, P. W., Smith, J. L.: Use of radio isotopes to trace water movement in coniferous trees.- Amer. J. Bot.55: 728–729, 1968.Google Scholar
  14. Penka, M.: VýbĚr metod ke stanovenÍ transpirace semenáčků dřevin [Selection of methods to determine the transpiration flow in trees seedlings]. - Sbornik VŠZ (Acta Univ. Agr. Brno) Řada C: Spisy Fak. lesn.4: 257–280, 1965.Google Scholar
  15. Beynolds, E. B. C.: The internal water balance of trees. - Forestry (Suppl):32, 1966.Google Scholar
  16. Butter, A. J.: Water consumption by forests. - In:Kozlowski, T. T. (ed.): Water Deficits and Plant Growth. Vol. 2. Pp. 23–84. Acad. Press, New York and London 1968.Google Scholar
  17. Skau, C. M., Swanson, R. H.: An improved heat pulse velocity meter as an indicator of sap speed and transpiration.- J. geophys. Bes.68: 4743–4749, 1963.CrossRefGoogle Scholar
  18. SlavÍk, B. et al.: Metody Studia Vodniho Provozu Bostlin. [Methods of Studying Plant Water Belations.] - Nakl. ČSAV, Praha 1965.Google Scholar
  19. Spomeb, G. G.: Sensors monitor tensions in transpiration streams of trees. - Science161: 484–485, 1968.CrossRefGoogle Scholar
  20. Swanson, B. H.: An instrument for detecting sap movement in woody plants. - U.S. Forest. Serv., Rocky Mountain Forest and Bange Exp. Sta., Sta. Paper 68. 16 pp. 1962.Google Scholar
  21. Swanson, B. H.: Improving tree transpiration estimates based on heat pulse velocity measurements. - Proc. 14th IUFBO-Congress, Munich, Pt. I, Sect.11: 252–263, 1967.Google Scholar
  22. Swanson, B. H., Lee, B.: Measurement of water movement from and through shrubs and trees. - J. Forest.64: 187–190, 1966.Google Scholar
  23. Vieweg, G. H., Ziegler, H.: Thermoelektrische Begistrierung der Geschwindigkeit des Transpirationsstromes. -Ber. deut. bot. Ges.73: 221–226, 1960.Google Scholar

Copyright information

© Institute of Experimental Botany 1973

Authors and Affiliations

  • J. Čermák
    • 1
  • M. Deml
    • 1
  • M. Penka
    • 1
  1. 1.Institute of International Biological Programme at the Department of Forest Botany and PhytoooenologyUniversity of AgricultureBrnoCzechoslovakia

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