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Effects of nitrogen addition on leaf nutrient stoichiometry in an old-growth boreal forest

文献类型：期刊论文

作者Xu, Longchao1; Xing, Aijun1; Du, Enzai2; Shen, Haihua1; Yan, Zhengbing3,5; Jiang, Lai3,5; Tian, Di3,5; Hu, Huifeng; Fang, Jingyun
刊名ECOSPHERE
出版日期2021
卷号12期号:1
关键词boreal forest Larix gmelinii leaf stoichiometry nitrogen deposition understory plants
ISSN号2150-8925
DOI10.1002/ecs2.3335
文献子类Article
英文摘要Boreal forests have been evidenced to be highly sensitive to enhanced nitrogen (N) deposition due to prevailing N limitations, and external N inputs from atmospheric deposition are expected to alter plant nutrient stoichiometry. Previous studies have mostly focused on the dominant tree species while neglecting understory plants that often play important role in the nutrient cycles in forest ecosystems. By conducting a six-year N-addition experiment with four treatments of 0 (control), 20 (low N), 50 (medium N), and 100 (high N) kg N.ha(-1).yr(-1) in a boreal forest in Northeast China, we assessed the responses of leaf nutrient stoichiometry (N, phosphorus [P], potassium [K], calcium [Ca], and magnesium [Mg]) for tree, shrubs, and grass. Although the responses of different species to N addition varied, six-year N addition, especially the medium and high N treatments, generally increased the leaf N concentration and decreased the leaf P and Ca concentrations. As a result, the foliar N:P, N:K, N:Ca, and N:Mg ratios increased consistently across plant functional groups under the high N addition compared with the control, and the grass Deyeuxia angustifolia showed a larger increase in its foliar N:P, N:Ca, and N:Mg than the shrubs. The leaf N concentration increased consistently with soil inorganic N in a nonlinear saturating form, while the other leaf nutrients either decreased (P, Ca) or were not affected (Mg, K) by the soil N availability. Consequently, the foliar N:P, N:K, N:Ca, and N:Mg ratios increased linearly with increasing soil N availability. In spite of this alteration of the leaf nutrient stoichiometry with increasing soil N availability, foliar nutrients and their stoichiometry were less affected under the low N treatment in both trees and understory plants, suggesting minor effects of current N deposition rates on the foliar nutrient balance in boreal forests.
学科主题Ecology
出版地HOBOKEN
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000614109800018
出版者WILEY
资助机构National Key Research and Development Program of China [2017YFC503901] ; Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SMC011]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/26746]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
4.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China
5.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Longchao,Xing, Aijun,Du, Enzai,et al. Effects of nitrogen addition on leaf nutrient stoichiometry in an old-growth boreal forest[J]. ECOSPHERE,2021,12(1).
APA Xu, Longchao.,Xing, Aijun.,Du, Enzai.,Shen, Haihua.,Yan, Zhengbing.,...&Fang, Jingyun.(2021).Effects of nitrogen addition on leaf nutrient stoichiometry in an old-growth boreal forest.ECOSPHERE,12(1).
MLA Xu, Longchao,et al."Effects of nitrogen addition on leaf nutrient stoichiometry in an old-growth boreal forest".ECOSPHERE 12.1(2021).

入库方式： OAI收割

来源：植物研究所

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