Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements
- 1 December 1987
- journal article
- research article
- Published by Oxford University Press (OUP) in Tree Physiology
- Vol. 3 (4) , 309-320
- https://doi.org/10.1093/treephys/3.4.309
Abstract
Transpiration of a Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stand was evaluated by sap flow measurements during a 4-month period. Between-tree variation in sap flow depended on crown class. On a sunny day, total transpiration was 1.6, 8.0 and 22.0 liters day−1 for suppressed, codominant and dominant trees, respectively. Transpiration estimated by sap flow fell below potential evapotranspiration when available soil water decreased below 30% of its maximum value. Sap flow measurements gave transpiration values similar to those obtained by the water balance method.This publication has 0 references indexed in Scilit: