干旱区生态环境知识资源中心(Arid): Enhancement of N2O emissions by grazing is related to soil physicochemical characteristics rather than nitrifier and denitrifier abundances in alpine grassland

Arid

DOI	10.1016/j.geoderma.2020.114511
	Enhancement of N2O emissions by grazing is related to soil physicochemical characteristics rather than nitrifier and denitrifier abundances in alpine grassland
	Yin, Mingyuan; Gao, Xiaopeng; Tenuta, Mario; Li, Lei; Gui, Dongwei; Li, Xiangyi; Zeng, Fanjiang
通讯作者	Gao, XP
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	375
英文摘要	Grazing can degrade grassland soil and increase nitrous oxide (N2O) emissions, but the underlying mechanism is poorly understood. We investigated the relationship of soil N2O emission with nitrifying enzyme activity (NEA), denitrifying enzyme activity (DEA), and the abundances of N2O-producing and N2O-reducing functional genes, in response to three grazing intensities (none, light, intensive) over two growing seasons on an alpine grassland on Kunlun Mountain in semi-arid North China. Compared to the non-grazed control, light and intensive grazing treatments increased the 2-yr total N2O emissions by 27.5% and 68.1%, respectively. Daily N2O flux rate correlated positively with soil water-filled pore space (WFPS), temperature, and dissolved organic carbon (DOC) but not with the abundances of nitrifiers (AOB, AOA, Nitrobacter-like nxrA), nitrate reducers (narG) and denitrifiers (nirS, nirK, and nosZ). These results suggest that soil environmental factors rather than nitrifier, N2O-producer and N2O-reducer abundances were more important in determining the grazing enhancement of N2O emissions from the alpine grassland in semi-arid areas. The abundance of AOB and Nitrobacter-like nxrA but not AOA correlated positively with NEA, indicating they are good indicators for the potential nitrification in this arid alpine grassland. Reducing grazing intensity from intensive to light resulted in more above-ground biomass and N uptake in both years and less N2O emissions in 2018. These results highlight the importance of establishing a proper grazing intensity to reduce N2O emissions from the degraded grassland while maintaining productivity for livestock.
英文关键词	Alpine grassland Denitrifier Grazing Microbial functional genes Nitrifier Quantitative PCR
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000551513100028
WOS关键词	NITROUS-OXIDE EMISSIONS ; GREENHOUSE-GAS FLUXES ; TIBETAN PLATEAU ; MEADOW ; FERTILIZATION ; COMMUNITIES ; METHANE ; CH4 ; METAANALYSIS ; MANAGEMENT
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325157
作者单位	[Yin, Mingyuan; Gao, Xiaopeng; Tenuta, Mario; Li, Lei; Gui, Dongwei; Li, Xiangyi; Zeng, Fanjiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Yin, Mingyuan; Gao, Xiaopeng; Li, Lei; Gui, Dongwei; Li, Xiangyi; Zeng, Fanjiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Cele 848300, Peoples R China; [Yin, Mingyuan; Gao, Xiaopeng; Li, Lei; Gui, Dongwei; Li, Xiangyi; Zeng, Fanjiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Cele Natl Stn Observat & Res Desert Grassiand Eco, Cele 848300, Peoples R China; [Yin, Mingyuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Gao, Xiaopeng; Tenuta, Mario] Univ Manitoba, Dept Soil Sci, Winnipeg, MB R3T 2N2, Canada
推荐引用方式 GB/T 7714	Yin, Mingyuan,Gao, Xiaopeng,Tenuta, Mario,et al. Enhancement of N2O emissions by grazing is related to soil physicochemical characteristics rather than nitrifier and denitrifier abundances in alpine grassland[J]. 中国科学院新疆生态与地理研究所,2020,375.
APA	Yin, Mingyuan.,Gao, Xiaopeng.,Tenuta, Mario.,Li, Lei.,Gui, Dongwei.,...&Zeng, Fanjiang.(2020).Enhancement of N2O emissions by grazing is related to soil physicochemical characteristics rather than nitrifier and denitrifier abundances in alpine grassland.GEODERMA,375.
MLA	Yin, Mingyuan,et al."Enhancement of N2O emissions by grazing is related to soil physicochemical characteristics rather than nitrifier and denitrifier abundances in alpine grassland".GEODERMA 375(2020).