A Comparison of Sap Flow Measurements and Potometry in Two Tropical Lowland Tree Species with Contrasting Wood Properties
Rev. biol. trop
;
54(1): 73-81, mar. 2006. ilus, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-484697
ABSTRACT
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.
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Índice:
LILACS (Américas)
Assunto principal:
Árvores
/
Madeira
/
Transpiração Vegetal
Tipo de estudo:
Estudos de avaliação
Idioma:
Inglês
Revista:
Rev. biol. trop
Assunto da revista:
Biologia
/
Medicina Tropical
Ano de publicação:
2006
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Costa Rica
/
Estados Unidos
Instituição/País de afiliação:
Universidad de Costa Rica/CR
/
University of Hawaii/US
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