We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Time lag characteristics of stem sap flow of common tree species during their growth season in Beijing downtown.
- Authors
Wang Hua; Ouyang Zhi-yun; Zheng Hua; Wang Xiao-ke; Ni Yong-ming; Ren Yu-fen
- Abstract
From April to September in 2008, the stem sap flow velocity (Js) of several common tree species (Ginkgo biloba, Aesculus chinensis, Magnolia denudata, Robinia pseudoacacia, Pinus tabulaeformis and Cedrus deodara) in Beijing was measured by thermal dissipation method. Cross-correlation analysis was used to estimate the time lag between the stem sap flow and the driving factors of canopy transpiration among the tree species. The Js of the six tree species was significantly correlated with the total radiation (Rs) and vapor pressure deficit (D), and the Js was lagged behind Rs but ahead of D. The maximum correlation coefficient of Js with Rs (0.74-0.93) was often higher than that of Js with D (0.57-0.79), indicating that the diurnal Js was more dependent on Rs than on D. The sampled tree species except P. tabulaeformis had a shorter time lag of Js with Rs (10-70 min) than with D (47-130 min), and there existed significant differences among R. pseudoacacia, P. tabulaeformis, and C. deodara. The time lag between the Js and the driving factors of canopy transpiration was mainly correlated with the tree features (DBH, tree height, canopy area, and sapwood area) and the nocturnal water recharge, regardless of tree species.
- Subjects
BEIJING (China); CHINA; EFFECT of radiation on plants; TUPAIA glis; PLANT growth; PLANT stems; ENERGY dissipation; VAPOR pressure; MULTIPURPOSE trees
- Publication
Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 9, p2111
- ISSN
1001-9332
- Publication type
Article