Clipping defoliation eliminates the stimulating effects of nitrogen enrichment on the aboveground productivity of an alpine meadow

doi:10.17221/543/2019-PSE

	Clipping defoliation eliminates the stimulating effects of nitrogen enrichment on the aboveground productivity of an alpine meadow
	Zong, Ning 1; Shi, Peili 1,2
刊名	PLANT SOIL AND ENVIRONMENT
	2020
卷号	66 期号:1 页码:47-56
关键词	compensatory growth nutrient improvement plant functional group selective clipping Tibetan Plateau
ISSN号	1214-1178
DOI	10.17221/543/2019-PSE
通讯作者	Zong, Ning(zongning@igsnrr.ac.cn)
英文摘要	To investigate how clipping (CL) regulates the effects of nutrient addition, an experiment, including CL and nitrogen (N) addition, was conducted in an alpine meadow. Nitrogen treatment increased community coverage (48-113% higher than the control) and aboveground biomass (29-117% higher than the control), which was mainly attributed to grass growth. Both N and N + CL treatments showed a tendency to reducing species richness, while significant reduction only occurred in 2016 and 2017 in CL treatment. Clipping showed a tendency to decrease community cover (3-37% lower than the control) and aboveground biomass (2-34% lower than the control), while N + CL treatment had no effect, indicating that clipping can eliminate the simulated effects of N addition. Nitrogen addition significantly increased soil inorganic N (SIN, 528-1230% higher than the control), while SIN in N + CL was 25-48% lower than N treatment. The decrease in stimulated effects in N + CL was attributed to SIN decrease, which resulted from the aboveground biomass removal by clipping. Our results show that clipping can take away aboveground biomass and cause soil nutrients to decrease, which slows down the degraded grassland recovery. This suggests that grazing exclusion may eliminate the effect of nitrogen deposition on aboveground production in alpine grasslands.
资助项目	National Science Foundation of China[31870406] ; National Science Foundation of China[41703079] ; National Key Research and Development Program[2016YFC0501803] ; National Key Research and Development Program[2017YFA0604802]
WOS关键词	TIBETAN PLATEAU ; SPECIES RICHNESS ; GRASSLAND ; RESPONSES ; BIOMASS ; AVAILABILITY ; BIODIVERSITY ; DIVERSITY ; COMMUNITY ; ECOSYSTEM
WOS研究方向	Agriculture
语种	英语
出版者	CZECH ACADEMY AGRICULTURAL SCIENCES
WOS记录号	WOS:000510857300007
资助机构	National Science Foundation of China ; National Key Research and Development Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/132426]
专题	中国科学院地理科学与资源研究所
通讯作者	Zong, Ning
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Lhasa Natl Ecol Res Stn, Key Lab Ecosyst Network Observat & Modelling, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zong, Ning,Shi, Peili. Clipping defoliation eliminates the stimulating effects of nitrogen enrichment on the aboveground productivity of an alpine meadow[J]. PLANT SOIL AND ENVIRONMENT,2020,66(1):47-56.
APA	Zong, Ning,&Shi, Peili.(2020).Clipping defoliation eliminates the stimulating effects of nitrogen enrichment on the aboveground productivity of an alpine meadow.PLANT SOIL AND ENVIRONMENT,66(1),47-56.
MLA	Zong, Ning,et al."Clipping defoliation eliminates the stimulating effects of nitrogen enrichment on the aboveground productivity of an alpine meadow".PLANT SOIL AND ENVIRONMENT 66.1(2020):47-56.