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Effects of soil warming and nitrogen foliar applications on bud burst of black spruce

De Barba Daniele, Rossi Sergio, Deslauriers Annie et Morin Hubert. (2016). Effects of soil warming and nitrogen foliar applications on bud burst of black spruce. Tree - Structure and Function, 30, (1), p. 87-97.

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URL officielle: http://dx.doi.org/doi:10.1007/s00468-015-1152-0

Résumé

Key message: In mature black spruce, bud burst process is anticipated by soil warming, while delayed by foliar applications of nitrogen; however, the effects depend on growth conditions at the site.

Abstract: The observation of phenological events can be used as biological indicator of environmental changes, especially from the perspective of climate change. In boreal forests, the onset of the bud burst is a key factor in the length of the growing season. With current climate change, the major factors limiting the growth of boreal trees (i.e., temperature and nitrogen availability) are changing and studies on mature trees are limited. The aim of this study was to investigate the effects of soil warming and increased nitrogen (N) deposition on bud burst of mature black spruce [Picea mariana (Mill.) BSP]. From 2008 onwards, an experimental manipulation of these environmental growth conditions was conducted in two stands (BER and SIM) at different altitudes in the boreal forest of Quebec, Canada. An increase in soil temperature (H treatment) and a canopy application of artificial rain enriched with nitrogen (N treatment) were performed. Observations of bud phenology were made during May–July 2012 and 2013. In BER, H treatment caused an anticipation (estimated as 1–3 days); while N treatment, a delay (estimated as 1–2 days but only in 2012) in bud burst. No treatments effect was significant in SIM. It has been demonstrated that soil temperature and N availability can play an important role in affecting bud burst in black spruce but the effects of these environmental factors on growth are closely linked with site conditions.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:09311890 (ISSN)
Volume:30
Numéro:1
Pages:p. 87-97
Version évaluée par les pairs:Oui
Date:Février 2016
Sujets: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:Départements et modules > Département des sciences fondamentales
Mots-clés:Boreal forest, bud burst, climate change, nitrogen, Picea mariana, soil warming, black spruce
Informations complémentaires:The final publication is available at Springer via http://dx.doi.org/doi:10.1007/s00468-015-1152-0
Déposé le:08 juin 2016 17:20
Dernière modification:05 déc. 2016 20:32
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