Biologia Plantarum

, Volume 15, Issue 3, pp 171–178

A new method of sap flow rate determination in trees

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

Abstract

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.

Metoda stanovenÍ vedenÍ vody u dřevin

Abstract

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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  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

Personalised recommendations