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The timing of spring rehydration and its relation with the onset of wood formation in black spruce

Turcotte Audrey, Morin Hubert, Krause Cornelia, Deslauriers Annie et Thibeault-Martel Maxime. (2009). The timing of spring rehydration and its relation with the onset of wood formation in black spruce. Agricultural and Forest Meteorology, 149, (9), p. 1403-1409.

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Stem and root radius variations in black spruce were monitored between August 2004 and October 2005 with automatic point dendrometers to determine if the timing of growth initiation corresponded to the rehydration of tissues in spring. Phases of contraction, expansion and increment were defined in a time series following the stem cycle approach. The cycles were classified into different types according to their characteristics and the temperature recorded during each phase. These classifications enabled a division of the year into three periods: winter shrinkage (1), spring rehydration (2) and summer transpiration (3). Rehydration lasted about one month (32-47 days), from mid-March to mid-April and trees were fully rehydrated 39 days before radial growth occurred in terms of cell enlargement, which started on May 27 in the stem and May 30 in the root. Growth initiation was not limited by the spring rehydration. The importance of temperature as a limiting factor to growth initiation was confirmed by meteorological data and the classification of cycles.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 1403-1409
Version évaluée par les pairs:Oui
Identifiant unique:10.1016/j.agrformet.2009.03.010
Sujets:Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie
Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Départements et modules > Département des sciences fondamentales
Mots-clés:dendrometer, radius variation, spring rehydration, tree growth, winter shrinkage
Déposé le:25 mai 2023 15:28
Dernière modification:25 mai 2023 15:35
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