Nitrogen enrichment alters plant N: P stoichiometry and intensifies phosphorus limitation in a steppe ecosystem

doi:10.1016/j.molp.2017.09.006

	Nitrogen enrichment alters plant N: P stoichiometry and intensifies phosphorus limitation in a steppe ecosystem
	Zhan, Shuxia ; Wang, Yang 1; Zhu, Zhicheng 1; Li, Wenhuai ; Bai, Yongfei
	2017
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	134 页码:21-32
摘要	Although many studies have demonstrated that N deposition decreases biodiversity and alters ecosystem functioning, fewer studies have tested how N enrichment affect plant N and P limitation, N: P stoichiometry and ecosystem functioning. We examined the independent and interactive effects of N and P enrichment on plant N: P stoichiometry, nutrient limitation, and thereby ecosystem functioning based on two N, P, and N+P addition experiments in a typical steppe. At the species level, N enrichment increased leaf N: P ratio and P limitation of dominant species. The resporises of plant tissue N: P ratio tend to saturate at soil available N: P supply ratio of approximately 20 for leaf N: P and 10 for root N: P ratio. At the community level, patterns of N and P limitation shifted from N limitation in a normal year to N and P co-limitation in a wet year, triggered mainly by inter-annual changes in soil N and P availability. The homoeostasis of N: P stoichiometry increases from plant leaves to roots and to microbes although the available N: P supply ratio varied by 56-fold in soil. Given that N deposition rates are projected to increase in upcoming decades, N deposition may further alter the stoichiometric balance of N and P and intensify P limitation of steppe ecosystems in future. (C) 2016 Elsevier B.V. All rights reserved.
关键词	N and P limitation N: P stoichiometry Rhizosphere effect Plant-soil feedbacks Water and light availability Primary production Soil N and P availability
学科领域	Biochemistry & Molecular Biology ; Plant Sciences
DOI	10.1016/j.molp.2017.09.006
收录类别	SCI
语种	英语
WOS关键词	INNER-MONGOLIA ; NUTRIENT LIMITATION ; GRASSLAND SOIL ; RHIZOSPHERE ; ACIDIFICATION ; RESPONSES ; DIVERSITY ; GROWTH ; MINERALIZATION ; PRODUCTIVITY
WOS记录号	WOS:000414599700012
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-7307
资助机构	National Key Research and Development Program of China [2016YFC0500804] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31320103916]
作者邮箱	yfbai@ibcas.ac.cn
作品OA属性	Green Submitted, Bronze
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/22076
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, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhan, Shuxia,Wang, Yang,Zhu, Zhicheng,et al. Nitrogen enrichment alters plant N: P stoichiometry and intensifies phosphorus limitation in a steppe ecosystem[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2017,134:21-32.
APA	Zhan, Shuxia,Wang, Yang,Zhu, Zhicheng,Li, Wenhuai,&Bai, Yongfei.(2017).Nitrogen enrichment alters plant N: P stoichiometry and intensifies phosphorus limitation in a steppe ecosystem.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,134,21-32.
MLA	Zhan, Shuxia,et al."Nitrogen enrichment alters plant N: P stoichiometry and intensifies phosphorus limitation in a steppe ecosystem".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 134(2017):21-32.

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