Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: neighbouring stands of beech (Fagus sylvatica L.) and black alder (Alnus glutinosa (L.) Gaertn.). | 107 Ann. For. Sci. 56 1999 107-120 Inra Elsevier Paris Original article Water use in neighbouring stands of beech Fagus sylvatica L. and black alder Alnus glutinosa L. Gaertn. Mathias Herbst Christiane Eschenbach Ludger Kappen Ecosystem Research Center Kiel University Schauenburgerstr. 112 24118 Kiel Germany Received 9 April 1998 accepted 15 September 1998 Abstract - In neighbouring stands of beech and black alder in northern Germany transpiration soil evaporation and interception evaporation were estimated for four meteorologically different years. By means of standard weather data a two-layer evaporation model of the Shuttleworth-Wallace type was applied. In the 105-year-old beech forest tree height 29 m maximum leaf area index annual transpiration Tr varied between 326 and 421 mm mean 389 mm or 50 of gross precipitation PG and annual evapotranspiration ET between 567 and 665 mm mean 617 mm or 79 of PG . In the 60-year-old alder stand tree height 18 m maximum leaf area index the respective values were 375 and 658 mm mean 538 mm or 69 of PG for Tr and 612 and 884 mm mean 768 mm or 99 of PG for ET. In years with high radiation input ET in the alder stand along a lake shore with unlimited water availability exceeded both PG and net radiation. The higher inter-annual weather-dependent variation of transpiration in alder corresponds to a lower capacity of stomatai regulation in alder if compared with beech. Inra Elsevier Paris. forest beech black alder evaporation transpiration Resume - utilisation de 1 eau dans deux peuplements de hêtre Fagus sylvatica L. et d aulne Alnus glutinosa L. Gaertn. juxtaposes. Dans une hêtraie et une aulnaie voisines au nord de FAllemagne la transpiration 1 évaporation du sol et 1 évaporation de 1 eau interceptée ont été éstimées pour quatre années présentant des conditions météorologiques differentes. Base sur des données météorologiques standard un modèle à deux couches a été applique. Pour la hêtraie âgée de 105 ans hauteur des
