干旱区生态环境知识资源中心(Arid): Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China

Arid

DOI	10.1016/j.geoderma.2019.01.002
	Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China
	Gu, Xueying 1; Wang, Yihui 2; Laanbroek, Hendrikus J.3,4; Xu, Xiaofeng 2; Song, Bing 5; Huo, Yawen 1; Chen, Shiping 1; Li, Linghao 1; Zhang, Lihua 1,2
通讯作者	Li, Linghao ; Zhang, Lihua
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2019
卷号	341 页码:18-25
英文摘要	Nitrous oxide (N2O) is one of the most important greenhouse gases emitted by the semi-arid grasslands of Northern China. The majority of previous studies focused on nitrogen (N) deposition and its impacts on N2O emission rates in this region, while the mechanisms and controls of N2O emission and the evidence for a balance point following increasing N deposition remained unclear. In this study, we investigated during 2013-2015 the environmental and plant controls over N2O emission rates within a long-term N addition experiment with nitrogen levels of 1, 2, 4, 8, 16, 32, 64 g N m(-2) yr(-1), respectively, by using an in situ static chamber method. The results showed that N2O emission rates increased with increasing nitrogen addition rates. The emission rates showed significantly positive linear correlations with soil temperature, NO3--N, NH4+-N, inorganic N, microbial biomass carbon, microbial biomass N, total soluble N, below-ground plant biomass and above-ground plant biomass, but a significantly negative correlation with soil pH. A structural equation modeling analysis showed that N addition affected in particular the pH value and subsequently N cycling and soil N2O emission. Meteorological factors impacted N2O emission rates through affecting soil environment and N cycling processes. The formulated N2O emission balance hypothesis was supported and the balance point at which the N2O emission rate became saturated was somewhere between 32 and 64 g N m(-2) yr(-1). The plant N usage efficiency was highest when the rate of N addition was 2 g N m(-2) yr(-1). The increased knowledge of environmental and plant control over soil N2O emission provides a better understanding of N cycling within the semi-arid temperate grassland ecosystem and will be fundamental for quantifying N2O budgets at various scales.
英文关键词	N2O flux Nitrogen deposition Soil parameters pH value SEM N2O emission balance hypothesis
类型	Article
语种	英语
国家	Peoples R China ; USA ; Netherlands
收录类别	SCI-E
WOS记录号	WOS:000459520100003
WOS关键词	FERTILIZER NITROGEN ; OXIDE EMISSIONS ; FLUXES ; SOIL ; CO2 ; CH4 ; DENITRIFICATION ; METAANALYSIS ; STEPPE ; BUDGET
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215928
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 2.San Diego State Univ, Biol Dept, San Diego, CA 92182 USA; 3.Netherlands Inst Ecol NIOO KNAW, Dept Microbial Ecol, Wageningen, Netherlands; 4.Univ Utrecht, Ecol & Biodivers Grp, Utrecht, Netherlands; 5.Ludong Univ, Sch Resources & Environm Engn, Yantai 264025, Peoples R China
推荐引用方式 GB/T 7714	Gu, Xueying,Wang, Yihui,Laanbroek, Hendrikus J.,et al. Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China[J]. 中国科学院植物研究所,2019,341:18-25.
APA	Gu, Xueying.,Wang, Yihui.,Laanbroek, Hendrikus J..,Xu, Xiaofeng.,Song, Bing.,...&Zhang, Lihua.(2019).Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China.GEODERMA,341,18-25.
MLA	Gu, Xueying,et al."Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China".GEODERMA 341(2019):18-25.