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

文献类型：期刊论文

作者Hou, Dongjie2; Guo, Ke2; Liu, Changcheng
刊名ECOLOGY AND EVOLUTION
出版日期2020
卷号10期号:16页码:8916-8926
关键词ecological stoichiometry grazing intensity macroelement microelement typical grassland
ISSN号2045-7758
DOI10.1002/ece3.6591
文献子类Article
英文摘要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.
学科主题Ecology ; Evolutionary Biology
出版地HOBOKEN
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
语种英语
WOS记录号WOS:000549603100001
出版者WILEY
资助机构National Basic Research ProgramNational Basic Research Program of China [2014CB138802]
源URL[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.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, 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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来源：植物研究所

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