气候变化领域集成服务门户(CCPortal): Aboveground conservation acts in synergy with belowground uptake to alleviate phosphorus deficiency caused by nitrogen addition in a larch plantation

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DOI	10.1016/j.foreco.2020.118309
	Aboveground conservation acts in synergy with belowground uptake to alleviate phosphorus deficiency caused by nitrogen addition in a larch plantation
	Lin G.; Gao M.; Zeng D.-H.; Fang Y.
发表日期	2020
ISSN	0378-1127
卷号	473
英文摘要	While growing evidence has shown the shift in terrestrial ecosystems from nitrogen (N) limitation to phosphorous (P) limitation under increasing N deposition, it is poorly understood how plants adapt to this P limitation. Here, we examined which strategies would be adopted by plants for alleviating P deficiency caused by N enrichment from the perspective of aboveground conservation and belowground uptake. To achieve this objective, we conducted a five-year N-addition experiment (0 and 50 kg N ha−1 yr−1) in a 60-year-old larch (Larix kaempferi) plantation, and measured variables related to ecosystem P status, leaf P resorption, soil exploration by roots and extraradical hyphae of ectomycorrhizal fungi, and rhizosphere effects on soil P cycling. We found that N addition significantly reduced soil available P concentration and enhanced leaf N:P ratio, indicating the increasing degree of P deficiency under N addition. Leaf P resorption efficiency and proficiency were significantly enhanced by N addition, implying the increase in aboveground P conservation. Moreover, N addition significantly increased root length density and decreased ectomycorrhizal extraradical hypha biomass, suggesting the enhanced role of the root pathway in scavenging soil P. Rhizosphere effects on phosphatase activity were significantly enhanced by N addition, indicating the improved capacity of mining P from organic P forms. Collectively, our findings highlight that the larch could concurrently improve aboveground P conservation and belowground P uptake to alleviate P deficiency induced by N addition, and suggest that adjustments in resource allocation associated with these adaptive strategies could have significant consequences on ecosystem functions. © 2020 Elsevier B.V.
关键词	Forestry Fungi Nitrogen Phosphorus Soils Ecosystem functions Ectomycorrhizal fungi Nitrogen additions Phosphatase activity Phosphorus deficiency Rhizosphere effects Root length density Terrestrial ecosystems Ecosystems aboveground production belowground production biomass concentration (composition)coniferous tree ectomycorrhiza experimental study fungus nutrient enrichment nutrient limitation phosphorus phosphorus cycle rhizosphere scavenging (feeding)Conservation Ecosystems Forestry Fungi Larix Nitrogen Phosphorus Soil Fungi Larix Larix kaempferi
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132710
推荐引用方式 GB/T 7714	Lin G.,Gao M.,Zeng D.-H.,et al. Aboveground conservation acts in synergy with belowground uptake to alleviate phosphorus deficiency caused by nitrogen addition in a larch plantation[J]. Forest Ecology and Management,2020,473.
APA	Lin G.,Gao M.,Zeng D.-H.,&Fang Y..(2020).Aboveground conservation acts in synergy with belowground uptake to alleviate phosphorus deficiency caused by nitrogen addition in a larch plantation.,473.
MLA	Lin G.,et al."Aboveground conservation acts in synergy with belowground uptake to alleviate phosphorus deficiency caused by nitrogen addition in a larch plantation".473(2020).