A study on sap flux density of two eucalyptus (Eucalyptus uro phylla) plantations in southeastern China by heat-pulse method The Radial Distribution of Xylem Sap Flow Velocity in Trunks of Pear Trees Water Consumption ofEucalyptus urophy lla P lantations on the Leizhou Peninsula Characteristics of Sap Flow in Eucalyptus urophylla Plantations on the Leizhou Peninsula