Characteristics of spatial variations in xylem sap flow in urban greening tree species Pinus tabulaeformis, Cedrus deodara and Robinia pseudoacacia in Beijing, China
WANG Hua, OUYANG Zhi-Yun, ZHENG Hua, WANG Xiao-Ke, NI Yong-Ming, REN Yu-Fen
Chin J Plant Ecol . 2010, (8): 924 -937 .  DOI: 10.3773/j.issn.1005-264x.2010.08.005