Capacity of stem water conductivity for two eucalyptus ( Eucalyptus urophylla ) plantations in South China |
| |
| Authors: | Yin Guangcai Zhou Guoyi Jim Morris Wang Xu Huang Zhihong Chu Guowei |
| |
| Affiliation: | (1) South China Institute of Botany, Chinese Academy of Sciences, 510650 Guangzhou, P. R. China;(2) Faculty of Environmental Sciences and Engineering, Guangdong University of Technology, 510090 Guangzhou, P. R. China;(3) Department of Natural Resources and Environment, Forest Science Center, 3084 Heidelberg, Victoria, Australia |
| |
| Abstract: | 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=AX 3+BX 2+CX+D (R 2=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. |
| |
| Keywords: | south China sap flux density (SFD) eucalyptus plantation water conductivity |
| 本文献已被 SpringerLink 等数据库收录！ |
|
