Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075

OAI: https://revistas.ucr.ac.cr/index.php/rbt/oai
A Comparison of Sap Flow Measurements and Potometry in Two Tropical Lowland Tree Species with Contrasting Wood Properties
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Palabras clave

heat dissipation technique
nocturnal uptake
potometer
tropical trees
sap flow
stomatal conductance
wood density

Cómo citar

Gutiérrez, M. V., & Santiago, L. S. (2006). A Comparison of Sap Flow Measurements and Potometry in Two Tropical Lowland Tree Species with Contrasting Wood Properties. Revista De Biología Tropical, 54(1), 73–81. https://doi.org/10.15517/rbt.v54i1.14000

Resumen

We evaluated the performance of the Heat Dissipation Technique (HDT) to measure sap flow in whole trees by comparison with potometric water uptake. Two tropical lowland species, Ochroma lagopus (balsa), a pioneer species with light wood and Hyeronima alchorneoides (pilón), a late-successional species with hard wood were examined. Diurnal courses of sap flow measured with the HDT showed good agreement with potometry. At the low sap flow rates (below 1 Kg h-1) occurring during nocturnal recharge HDT consistently underestimated sap flow rates. This resulted in the failure of the current version of the HDT to measure nocturnal water uptake, an important component of the water budget of at least one of the two species examined.
https://doi.org/10.15517/rbt.v54i1.14000
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Derechos de autor 2006 Revista de Biología Tropical

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