Global patterns of root dynamics under nitrogen enrichment

doi:10.1038/s41598-017-13513-x

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	Global patterns of root dynamics under nitrogen enrichment
	Peng, Yunfeng ; Guo, Dali 1; Yang, Yuanhe
刊名	GLOBAL ECOLOGY AND BIOGEOGRAPHY
	2017
卷号	26 期号:1 页码:102-114
关键词	Carbon (C) cycle nitrogen (N) input root production root standing crop root turnover soil organic carbon
ISSN号	1466-822X
DOI	10.1038/s41598-017-13513-x
文献子类	Article
英文摘要	Aim Root production and turnover play a key role in regulating carbon (C) flow in terrestrial ecosystems. However, a general pattern reflecting the responses of roots to increasing nitrogen (N) input has yet to be described. Location Global terrestrial ecosystems. Methods We conducted a meta-analysis to assess the central tendencies of root production, turnover rate and standing crop with respect to the experimental addition of N. We evaluated the effect of the form of N, root diameter and climatic (mean annual temperature, MAT; mean annual precipitation, MAP), biotic (ecosystem type, plant type and forest stand age) and forcing factors (experimental duration, N addition rate and cumulative amount of N) on the variations in root response. Results Globally, the addition of N significantly decreased root production and turnover rate but had only a minor impact on root standing crop. In different ecosystems, the three root variables exhibited heterogeneous responses to N enrichment. Additionally, root production and turnover rate responded distinctly to diverse forms of N. The responses of root production and turnover rate to the addition of N were generally positively correlated with MAT and MAP but negatively related to forest stand age and experimental duration. The response pattern of root standing crop was negatively affected by MAT, MAP and forest stand age. However, none of the three root parameters had any obvious correlations with N addition rate or cumulative amount of N. Main conclusions Our results demonstrate that, on aggregate, the addition of N decreased root production and turnover rate at the global scale. These root response patterns and the regulatory factors can be incorporated into earth system models to improve the prediction of belowground C dynamics.
学科主题	Science & Technology - Other Topics
电子版国际标准刊号	1466-8238
出版地	HOBOKEN
WOS关键词	NORWAY SPRUCE STAND ; BELOW-GROUND CARBON ; REDUCES SOIL RESPIRATION ; NET PRIMARY PRODUCTIVITY ; LONG-TERM FERTILIZATION ; N-FERTILIZATION ; NUTRIENT AVAILABILITY ; FRAXINUS-MANDSHURICA ; FOREST ECOSYSTEMS ; TROPICAL FOREST
语种	英语
出版者	WILEY
WOS记录号	WOS:000413048000101
资助机构	National Basic Research Program of China on Global ChangeNational Basic Research Program of China [2014CB954001, 2015CB954201] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31322011, 41371213, 31400417] ; Chinese Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2014T70140, 2013M540160] ; Chinese Academy of Sciences-Peking University Pioneer Collaboration Team ; Thousand Young Talents ProgramChinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/21972]
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.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr,Chinese Ecosyst Res Network, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Peng, Yunfeng,Guo, Dali,Yang, Yuanhe. Global patterns of root dynamics under nitrogen enrichment[J]. GLOBAL ECOLOGY AND BIOGEOGRAPHY,2017,26(1):102-114.
APA	Peng, Yunfeng,Guo, Dali,&Yang, Yuanhe.(2017).Global patterns of root dynamics under nitrogen enrichment.GLOBAL ECOLOGY AND BIOGEOGRAPHY,26(1),102-114.
MLA	Peng, Yunfeng,et al."Global patterns of root dynamics under nitrogen enrichment".GLOBAL ECOLOGY AND BIOGEOGRAPHY 26.1(2017):102-114.