Aridity stimulates responses of root production and turnover to warming but suppresses the responses to nitrogen addition in temperate grasslands of northern China

doi:10.1016/j.scitotenv.2020.142018

	Aridity stimulates responses of root production and turnover to warming but suppresses the responses to nitrogen addition in temperate grasslands of northern China
	Yan, Chuang 2,3; Yuan, Zhiyou 1,2; Liu, Zunchi 4; Zhang, Jingjing 4; Liu, Kai 4; Shi, Xinrong 1,2; Lock, T. Ryan 5; Kallenbach, Robert L.5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-01-20
卷号	753 页码:10
关键词	Aridity gradient Experimental warming Grassland type Nitrogen addition
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.142018
通讯作者	Yuan, Zhiyou(zyyuan@ms.iswc.ac.cn)
英文摘要	Global warming and nitrogen (N) deposition are known to affect root dynamics in grasslands. However, previous studies were based only on a single ecosystem type, so it is unclear how warming and N addition affect root traits (root biomass, root-shoot ratio, root production and turnover) along the aridity gradient. In this study, we conducted an experiment to determine the effects of warming and N addition on root traits in desert, typical, and meadow grasslands in northern China, where the aridity gradually decreases from west to east across the region. Warming increased root-shoot ratio in dry year due to decline in soil water, but had a downward trend in root production and turnover in all three grasslands. N addition decreased root-shoot ratio in humid year due to increase in soil N, whereas did not significantly affect root production in any grasslands and increased root turnover in desert and meadow grasslands rather than typical grassland. Warming combined with N addition had negatively additive effects on root turnover in typical and meadow grasslands rather than desert grassland. N addition-induced changes in root biomass and root-shoot ratio were negatively affected by aridity in dry year. Aridity positively affected responses of root production and turnover to warming but negatively affected those responses to N addition. However, root-shoot ratio, root production and turnover under warming combined with N addition were not affected by aridity. Our results suggest that warming suppresses root carbon (C) input but N addition may exacerbate it in temperate grasslands, and warming combined with N addition suppresses it only in wet grasslands. Aridity promotes root C input under warming but suppresses it under N addition. However, aridity may little affect soil C and nutrient dynamics under global warming combined with N deposition in temperate grasslands in the future. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Key Research and Development Program of China[2016YFA0600801] ; Hundred Talents Program of Shaanxi Province[A289021701] ; Natural Science Basic Research Plan in Shaanxi Province of China[2018JZ3002] ; Special Fund from the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-C9] ; Double First Class University Plan of NWSUAF[Z102021829]
WOS关键词	CARBON ALLOCATION ; LEYMUS-CHINENSIS ; ATMOSPHERIC CO2 ; TYPICAL STEPPE ; CLIMATE-CHANGE ; SOIL-NITROGEN ; GLOBAL CHANGE ; ELEVATED CO2 ; WATER ; DYNAMICS
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000588616700099
资助机构	National Key Research and Development Program of China ; Hundred Talents Program of Shaanxi Province ; Natural Science Basic Research Plan in Shaanxi Province of China ; Special Fund from the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau ; Double First Class University Plan of NWSUAF
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156645]
专题	中国科学院地理科学与资源研究所
通讯作者	Yuan, Zhiyou
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 5.Univ Missouri, Coll Agr Food & Nat Resources, Div Plant Sci, 108 Waters Hall, Columbia, MO 65211 USA
推荐引用方式 GB/T 7714	Yan, Chuang,Yuan, Zhiyou,Liu, Zunchi,et al. Aridity stimulates responses of root production and turnover to warming but suppresses the responses to nitrogen addition in temperate grasslands of northern China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,753:10.
APA	Yan, Chuang.,Yuan, Zhiyou.,Liu, Zunchi.,Zhang, Jingjing.,Liu, Kai.,...&Kallenbach, Robert L..(2021).Aridity stimulates responses of root production and turnover to warming but suppresses the responses to nitrogen addition in temperate grasslands of northern China.SCIENCE OF THE TOTAL ENVIRONMENT,753,10.
MLA	Yan, Chuang,et al."Aridity stimulates responses of root production and turnover to warming but suppresses the responses to nitrogen addition in temperate grasslands of northern China".SCIENCE OF THE TOTAL ENVIRONMENT 753(2021):10.