TY JOUR TI Thermal polarization mechanism of sap flow during the spring equinox KW thermal polarization phenomena KW temperature change of the environment KW transport of water in the xylem KW spring sap flow KW osmotic pressure. JO Forestry Engineering Journal AU Kamalova, N.. AU Evsikova, N.. AU Matveev, N.. AU Lisitsyn, V.. PY 2015 IS 4 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov