Daylength and thermal time responses of budburst during dormancy release in some northern deciduous trees

alnus glutinosa alnus incana betula pendula betula pubescens bourgeon buds choix de la date cold corylus avellana dormance dormancy dormancy breaking fotoperiodismo frio froid noruega norway photoperiodicity populus tremula prunus padus rubus idaeus salida de la latencia temperatura temperature timing yema (planta)