中国林学(英文版)
中國林學(英文版)
중국림학(영문판)
FORESTRY STUDIES IN CHINA
2004年
1期
27-32
,共6页
south China%sap flux density (SFD)%eucalyptus plantation%water conductivity
The sap flux density (SFD) was used as a measure of water capacity through stems of eucalyptus in this paper. It was found that daily SFD increased with daily vapor pressure deficit (VPD) in nonlinear regression Y = AX3 + BX2 + CX + D (R2 = 0.702 1, n = 135, p = 0.01) at both sites (Hetou and Jijia) in the Leizhou Peninsula, Guangdong Province, China, where Y was daily SFD, X was mean daily VPD, A, B, C, D were constants. But extremely high VPD might limit stem water conductivity. The environmental factors, such as air vapor pressure deficit (VPD), solar radiation (RAD), etc., were the main determinants of SFD for E. urophylla plantations. The upper threshold of diurnal SFD was 51.55-55.65 mL·cm-2·h-1 under the selected extremely high environmental conditions.
