DOI: 10.1016/j.foreco.2013.05.039
Scopus记录号: 2-s2.0-84879538534
论文题名: Physiological and growth responses to pruning season and intensity of hybrid poplar
作者: Maurin V. ; DesRochers A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 304 起始页码: 399
结束页码: 406
语种: 英语
英文关键词: Intensive silviculture
; Non-structural sugar
; Photosynthesis
; Populus
; Stomatal conductance
; Water stress
Scopus关键词: Intensive silvicultures
; Non-structural
; Populus
; Stomatal conductance
; Water stress
; Carbon
; Photosynthesis
; Physiological models
; Physiology
; Vegetation
; Forestry
; dicotyledon
; drought stress
; foliage
; growing season
; growth response
; hybrid
; isotopic ratio
; nitrogen
; photosynthesis
; physiological response
; plantation forestry
; pruning
; silviculture
; stomatal conductance
; water stress
; Carbon
; Forestry
; Photosynthesis
; Physiology
; Plants
; Populus
英文摘要: Pruning is one of the silvicultural practices recommended for poplar plantations in order to produce clearwood. Common wisdom proposes pruning during the summer season, however little is known on trees' physiological responses to pruning season and intensity. This study aimed at determining the effects of pruning season and intensity on growth and physiology of four hybrid poplar clones. Using 3years old trees, we compared nine combinations of pruning season (fall, spring and summer) and intensity (unpruned, 1/3 and 2/3 of crown length pruned). We found that pruning increased net photosynthesis of residual foliage, nitrogen foliar concentrations and reduced total non-structural carbohydrates reserves of roots. Leaf carbon isotopic ratios (δ13C) of pruned trees decreased compared to unpruned trees, reflecting their greater stomatal conductance and suggesting that pruned trees could have greater drought stress resistance. Two growing seasons after pruning, 1/3 pruned trees had reduced height growth except for those pruned in summer. Regardless of pruning season, pruning 2/3 of the live crown reduced both breast height diameter and height 2years after treatments. Summer pruning increased foliar nitrogen concentrations, stomatal conductance and decreased leaf carbon isotopic ratios (δ13C) more than for trees pruned in fall or spring, suggesting better capacities to recover from pruning. We concluded that removal of 1/3 of the lower crown in summer was the best option to produce clear wood without compromising growth rates and physiological processes in hybrid poplar. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66511
Appears in Collections: 影响、适应和脆弱性
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作者单位: Université du Québec en Abitibi-Témiscamingue, Chaire industrielle en Aménagement Forestier Durable, 341 rue Principale Nord, Amos, QC, J9T 2L8, Canada
Recommended Citation:
Maurin V.,DesRochers A.. Physiological and growth responses to pruning season and intensity of hybrid poplar[J]. Forest Ecology and Management,2013-01-01,304