干旱区生态环境知识资源中心(Arid): Nitrogen enrichment suppresses revegetated shrub growth under increased precipitation via herb-induced topsoil water limitation in a desert ecosystem in northern China

Arid

DOI	10.1007/s11104-019-04362-w
	Nitrogen enrichment suppresses revegetated shrub growth under increased precipitation via herb-induced topsoil water limitation in a desert ecosystem in northern China
	She, Weiwei 1,2; Bai, Yuxuan 1; Zhang, Yuqing 1,3; Qin, Shugao 1,4; Jia, Xin 1,3; Feng, Wei 1,3; Lai, Zongrui 1,3; Fu, Jie 1; Qiao, Yangui 1
通讯作者	Zhang, Yuqing
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2020
卷号	446 期号:1-2 页码:97-110
英文摘要	Background and aims Revegetated woody plant communities are widely distributed in degraded drylands, and they are expected to be intrinsically sensitive to precipitation change and nitrogen enrichment. However, the interactive effects of precipitation and nitrogen on them remain largely unknown. This study aimed to examine how revegetated plant community responds to an increase in precipitation and nitrogen enrichment. Methods We conducted a field experiment over three years in a revegetated Artemisia ordosica shrubland in the Mu Us Desert of northern China, and investigated the effects of water and nitrogen addition on plant growth and soil resource availability. Results Increased precipitation and nitrogen enrichment dramatically promoted herb growth. Increased precipitation significantly increased shrub productivity without fertilization, whereas nitrogen enrichment weakened shrub growth under increased precipitation. Nitrogen enrichment significantly reduced topsoil moisture and offset water stress alleviation under increased precipitation. Structural equation modeling revealed that nitrogen-enhanced herb growth caused topsoil moisture to decline, potentially weakening shrub growth under increased precipitation. Conclusions The results suggest that nitrogen enrichment tends to suppress shrub growth under increased precipitation due to herb-induced topsoil water limitation. Our findings provide empirical evidence that water competition from herbaceous plants negatively affect shrub growth under nitrogen enrichment, and highlight the plant-water interaction underlying the responses of desert shrubland to global environmental changes.
英文关键词	Community composition Environmental changes Mu Us Desert Revegetation Shrubland
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000495702700001
WOS关键词	MU-US DESERT ; ARTEMISIA-ORDOSICA ; CLIMATE-CHANGE ; PRIMARY PRODUCTIVITY ; 2-LAYER HYPOTHESIS ; SEMIARID SHRUBLAND ; N-ENRICHMENT ; PLANT ; RESPONSES ; DESERTIFICATION
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
EI主题词	2019-11-12
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310838
作者单位	1.Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China; 2.Beijing Forestry Univ, Sch Forest Sci, Beijing 100083, Peoples R China; 3.Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China; 4.Beijing Forestry Univ, Engn Res Ctr Forestry Ecol Engn, Minist Educ, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	She, Weiwei,Bai, Yuxuan,Zhang, Yuqing,et al. Nitrogen enrichment suppresses revegetated shrub growth under increased precipitation via herb-induced topsoil water limitation in a desert ecosystem in northern China[J]. 北京林业大学,2020,446(1-2):97-110.
APA	She, Weiwei.,Bai, Yuxuan.,Zhang, Yuqing.,Qin, Shugao.,Jia, Xin.,...&Qiao, Yangui.(2020).Nitrogen enrichment suppresses revegetated shrub growth under increased precipitation via herb-induced topsoil water limitation in a desert ecosystem in northern China.PLANT AND SOIL,446(1-2),97-110.
MLA	She, Weiwei,et al."Nitrogen enrichment suppresses revegetated shrub growth under increased precipitation via herb-induced topsoil water limitation in a desert ecosystem in northern China".PLANT AND SOIL 446.1-2(2020):97-110.