Review of advances in radial patterns of stem sap flow Analysis on sap flow characteristics of Eucalyptus urophylla × E. grandis Characteristics of Sap Flow in Eucalyptus urophylla Plantations on the Leizhou Peninsula Relations Between Stem Sap Flow Density of Larix gmelinii and Environmental Factors under Different Temporal Scale Water Consumption ofEucalyptus urophy lla P lantations on the Leizhou Peninsula Character istics of Sap F lux Den sity andW a ter Use of P inus ca ribaeaP lan ta tion in Dry Sea son on the L eizhou Peninsula Variation of Sap Flow Density of Larix principis-rupprechtii with Dominances And Its Impact on Stand Transpiration Estimation