Dynamics of sap flow density in stems of typical desert shrub Calligonum mongolicum and its responses to environmental variables. Research of transpiration and evapotranspiration from a grapevine canopy combining the sap flow and eddy covariance techniques Plant transpiration in a maize/soybean intercropping system measured with heat balance method. Sap-flow Pattern and its Responses of Hedysarum scoparium Fisch.et Mey.to Environmental Factors Stem sap flow of Dahurian larch (Larix gmelinii Rupr.) trees transplanted from a latitudinal gradient Dynamics and responses of sap flow of typical sand binding plants Haloxylon ammodendron to environmental variables