학술논문
Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements.
Document Type
Article
Author
Source
Tree Physiology; December 1987, Vol. 3 Issue: 4 p309-320, 12p
Subject
Language
ISSN
0829318X; 17584469
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.