气候变化领域集成服务门户(CCPortal): Eight-year ecophysiology and growth dynamics of Picea rubens seedlings planted in harvest gaps of partially cut stands

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DOI	10.1016/j.foreco.2020.118514
	Eight-year ecophysiology and growth dynamics of Picea rubens seedlings planted in harvest gaps of partially cut stands
	Dumais D.; Raymond P.; Prévost M.
发表日期	2020
ISSN	0378-1127
卷号	478
英文摘要	In order to compensate for regeneration failure of red spruce (Picea rubens) in the managed temperate mixedwood forest, an enrichment planting study was conducted in yellow birch (Betula alleghaniensis)–conifer stands, in Quebec, Canada. The experimental design compared four cutting treatments: an uncut control (26 m2·ha−1 of merchantable basal area [BA], with mean natural canopy gap areas of ≤ 100 m2 each) and three hybrid single-tree and group-selection cuttings corresponding to a light cut (20% removal; residual BA [RBA]: 21 m2·ha−1; mean harvest gap area: 220 m2), a moderate cut (31% removal; RBA: 18 m2·ha−1; gap area: 270 m2), and a heavy cut (42% removal; RBA: 15 m2·ha−1; gap area: 340 m2). In the cuts, large-sized containerized seedlings of red spruce were planted within harvest gaps, while in the control, seedlings were planted systematically, for comparison. Three years later, a mechanical release treatment was applied in half of planted plots to limit competing vegetation. After eight years, seedling survival in the three cuts was equally high (> 80%), and greater than in the control (40%). Morphophysiological performance of seedlings was best in the heavy cut creating the largest gaps. In general, the release treatment enhanced survival in the control and in the light cut with the smallest gap sizes. Release also improved morphophysiological performance (which, however, remained suboptimal) in all cutting treatments, but especially in the heavy cut. Although red spruce is highly shade-tolerant, the low survival and performance in the control suggest that for this species, seedlings grown with traditional forest nursery practices are not adapted to plantation under a closed canopy. Results indicate that enrichment planting in intermediate-size harvest gaps (of about 340 m2 in area) of partially cut stands (of about 40% in BA) combined to mechanical release could be a good strategy to maintain or reintroduce red spruce and promote its morphophysiological performance. © 2020
英文关键词	Acclimation; Light-saturated photosynthesis; Mixedwood silviculture; Red spruce; Seedling development; Yellow birch–conifer stands
语种	英语
scopus关键词	Harvesting; Reforestation; Closed canopies; Group selection; Growth dynamics; Mechanical release; Mixedwood forests; Quebec , Canada; Regeneration failure; Seedling survival; Seed; basal area; canopy gap; coniferous tree; ecophysiology; forest ecosystem; growth; seedling; stand structure; Control Systems; Cuttings; Harvesting; Picea Rubens; Reforestation; Release; Seedlings; Canada; Quebec [Canada]; Betula alleghaniensis; Coniferophyta; Picea rubens
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154963
作者单位	Ministère des Forêts, de la Faune et des Parcs du Québec (MFFP), Direction de la recherche forestière, 2700, rue Einstein, Québec, QC G1P 3W8, Canada
推荐引用方式 GB/T 7714	Dumais D.,Raymond P.,Prévost M.. Eight-year ecophysiology and growth dynamics of Picea rubens seedlings planted in harvest gaps of partially cut stands[J],2020,478.
APA	Dumais D.,Raymond P.,&Prévost M..(2020).Eight-year ecophysiology and growth dynamics of Picea rubens seedlings planted in harvest gaps of partially cut stands.Forest Ecology and Management,478.
MLA	Dumais D.,et al."Eight-year ecophysiology and growth dynamics of Picea rubens seedlings planted in harvest gaps of partially cut stands".Forest Ecology and Management 478(2020).