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	Weak growth response to nitrogen deposition in an old-growth boreal forest
	Du, Enzai ; Fang, Jingyun
	2014
关键词	growth efficiency net primary production nitrogen deposition old-growth forest phosphorus limitation progressive nitrogen saturation NUTRIENT LIMITATION PHOSPHORUS LIMITATION TERRESTRIAL ECOSYSTEMS ATMOSPHERIC NITROGEN TEMPERATE FORESTS LEAF NITROGEN CARBON SATURATION FERTILIZATION ALLOCATION
DOI	10.1890/ES14-00109.1
英文摘要	Nitrogen (N) deposition has been enhanced globally due to the dramatic increase in anthropogenic N emissions, but the effects of N deposition on the growth of old-growth forests remain poorly understood. A three-year N enrichment experiment (0, 20, 50 and 100 kg N ha(-1) yr(-1)) was conducted in an old-growth boreal forest in Northeast China to explore its growth response to enhanced N deposition. Nitrogen enrichment significantly increased N availability but caused only a very weak stimulation of growth (<3 kg C/kg N), indicating a minor N limitation. Nitrogen enrichment did not significantly influence the mass production of needle-leaves but increased the production of woody biomass, leading to a slight improvement in growth efficiency. Nitrogen content increased and phosphorus (P) content decreased in freshly fallen needle-leaves, leading to an increase of N:P ratios. The failure of P acquisition to match the increased N uptake suggests a limitation of soil P availability. Our results support the hypothesis of progressive N saturation and indicate that N deposition may cause a very weak stimulation of carbon sequestration in old-growth forests.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000345097000006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Ecology; SCI(E); 1; ARTICLE; jyfang@urban.pku.edu.cn; 9; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/388209]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Du, Enzai,Fang, Jingyun. Weak growth response to nitrogen deposition in an old-growth boreal forest[J],2014.
APA	Du, Enzai,&Fang, Jingyun.(2014).Weak growth response to nitrogen deposition in an old-growth boreal forest..
MLA	Du, Enzai,et al."Weak growth response to nitrogen deposition in an old-growth boreal forest".(2014).

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