Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

doi:10.1002/ece3.6591

	Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands
	Hou, Dongjie 1; Guo, Ke1 ; Liu, Changcheng
	2020
发表期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
卷号	10 期号:16 页码:8916-8926
摘要	Grazing is a traditional grassland management technique and greatly alters ecosystem nutrient cycling. The effects of grazing intensity on the nutrient dynamics of soil and plants in grassland ecosystems remain uncertain, especially among microelements. A 2-year field grazing experiment was conducted in a typical grassland with four grazing intensities (ungrazed control, light, moderate, and heavy grazing) in Inner Mongolia, China. Nutrient concentration was assessed in soil and three dominant plant species (Stipa krylovii,Leymus chinensis, andCleistogenes squarrosa). Assessed quantities included four macroelements (carbon (C), nitrogen (N), phosphorus (P), and magnesium (Mg)) and four microelements (copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn)). Soil total C, total N, total P, available N, and available P concentrations significantly increased with grazing intensity but soil Mg, Cu, Fe, Mn, Zn concentrations had no significant response. Plant C concentration decreased but plant N, P, Mg, Cu, Fe, Mn, and Zn concentrations significantly increased with grazing intensity. In soil, macroelement dynamics (i.e., C, N, and P) exhibited higher sensitivity with grazing intensity, conversely in plants, microelements were more sensitive. This result indicates macroelements and microelements in soil and plants had asymmetric responses with grazing intensity. The slopes of nutrient linear regression inC. squarrosawere higher than that ofS. kryloviiandL. chinensis, indicating thatC. squarrosahad higher nutrient acquisition capacity and responded more rapidly to heavy grazing. These findings indicate that short-term heavy grazing accelerates nutrient cycling of the soil-plant system in grassland ecosystems, elucidate the multiple nutrient dynamics of soil and plants with grazing intensity, and emphasize the important function of microelements in plant adaptation in grazing management.
关键词	ecological stoichiometry grazing intensity macroelement microelement typical grassland
学科领域	Ecology ; Evolutionary Biology
DOI	10.1002/ece3.6591
收录类别	SCI
语种	英语
WOS关键词	LEYMUS-CHINENSIS ; TYPICAL STEPPE ; MIXED-GRASS ; NITROGEN ; CARBON ; RESPONSES ; MANAGEMENT ; VEGETATION ; PHOSPHORUS ; IMPACT
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
WOS记录号	WOS:000549603100001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
资助机构	National Basic Research ProgramNational Basic Research Program of China [2014CB138802]
作者邮箱	greatwall01@ibcas.ac.cn
作品OA属性	gold, Green Published
引用统计	被引频次：9[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/2S10CLM1/21675
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.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Hou, Dongjie,Guo, Ke,Liu, Changcheng. Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands[J]. ECOLOGY AND EVOLUTION,2020,10(16):8916-8926.
APA	Hou, Dongjie,Guo, Ke,&Liu, Changcheng.(2020).Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands.ECOLOGY AND EVOLUTION,10(16),8916-8926.
MLA	Hou, Dongjie,et al."Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands".ECOLOGY AND EVOLUTION 10.16(2020):8916-8926.

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