气候变化领域集成服务门户(CCPortal): Root system origin and structure influence planting shock of black spruce seedlings in boreal microsites

CCPortal

DOI	10.1016/j.foreco.2018.11.043
	Root system origin and structure influence planting shock of black spruce seedlings in boreal microsites
	Pernot C.; Thiffault N.; DesRochers A.
发表日期	2019
ISSN	0378-1127
起始页码	594
结束页码	605
卷号	433
英文摘要	Planting shock can last for several years during which seedling growth may significantly slow down. This duration depends upon the time that is required for the root system to acclimatize to its new environment. We hypothesized that characteristics of the root system are important factors for black spruce (Picea mariana [Mill.] BSP) seedling establishment. To test this hypothesis, we compared growth and physiology of three stock types: containerized seedlings, with a dense initial root system restricted to the volume of a root plug; deeply planted containerized seedlings, with the stem buried during production to develop dense adventitious and initial root systems; and bareroot seedlings, with a less developed but unrestricted initial root system. The three stock types were planted on three microsites that are typical of reforestation sites found in eastern Canadian boreal forest: (1) bare mineral soil; (2) in presence of ericaceous shrubs; or (3) in presence of Sphagnum spp. and ericaceous species. Labelled nitrogen fertilizer was added to half of the seedlings to compare nitrogen uptake. We measured seedling growth (height, diameter, above- and belowground biomass), nutrition (including 15N uptake) and 13C discrimination (as an indicator of water stress) at the end of the second growing season. Except at the root level, there were few interactions between stock types and microsites. For fertilized microsites, we speculate that ericaceous species captured most added nutrients since seedlings that were planted directly on mineral soil had greater height and diameter increments than seedlings with competing vegetation. In unfertilized microsites, Sphagnum spp. and ericaceous species had significant negative effects on seedling growth. For stock type, the presence of a root plug allowed containerized and deeply planted seedlings to have a lower δ13C, suggesting less water stress compared to bareroot seedlings. Strong initial root system development of containerized seedlings resulted in greater total biomass. We hypothesized that the presence of adventitious roots in deeply planted seedlings positively influenced nutrient uptake, particularly N. As nutrient availability is one of the most limiting factors in the boreal forest, we suggest using deeply planted containerized seedlings to reduce planting stress. © 2018 Elsevier B.V.
英文关键词	Adventitious root; Bareroot seedling; Black spruce; Containerized seedling; Initial root; Planting shock; Stock type
语种	英语
scopus关键词	Containers; Cultivation; Ecology; Nitrogen fertilizers; Nutrients; Plants (botany); Reforestation; Adventitious root; Bareroot seedlings; Black spruce; Containerized seedling; Initial root; Planting shock; Stock type; Seed; acclimation; boreal forest; coniferous tree; ecophysiology; fertilizer application; nutrient availability; nutrient uptake; reforestation; root system; seedling; stock assessment; tree planting; Containers; Cultivation; Ecology; Nutrients; Picea Mariana; Reforestation; Picea mariana; Sphagnum
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/156248
作者单位	Institut de recherche sur les forêts, Université du Québec en Abitibi-Témiscamingue, 341 rue Principale Nord, Amos, QC J9T 2L8, Canada; Canadian Wood Fibre Centre, Canadian Forest Service, Natural Resources Canada, 1055 rue du P.E.P.S., Québec, QC G1V 4C7, Canada
推荐引用方式 GB/T 7714	Pernot C.,Thiffault N.,DesRochers A.. Root system origin and structure influence planting shock of black spruce seedlings in boreal microsites[J],2019,433.
APA	Pernot C.,Thiffault N.,&DesRochers A..(2019).Root system origin and structure influence planting shock of black spruce seedlings in boreal microsites.Forest Ecology and Management,433.
MLA	Pernot C.,et al."Root system origin and structure influence planting shock of black spruce seedlings in boreal microsites".Forest Ecology and Management 433(2019).