干旱区生态环境知识资源中心(Arid): Nitrous Oxide Emissions from an Alpine Grassland as Affected by Nitrogen Addition

Arid

DOI	10.3390/atmos12080976
	Nitrous Oxide Emissions from an Alpine Grassland as Affected by Nitrogen Addition
	Wu, Yufeng; Gao, Xiaopeng; Cao, Dengchao; Li, Lei; Li, Xiangyi; Zeng, Fanjiang
通讯作者	Li, XY (corresponding author), Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China. ; Li, XY (corresponding author), Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Cele 848300, Peoples R China. ; Li, XY (corresponding author), Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China. ; Li, XY (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. ; Gao, XP (corresponding author), Univ Manitoba, Dept Soil Sci, Winnipeg, MB R3T 2N2, Canada.
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2021
卷号	12 期号:8
英文摘要	Nitrogen (N) addition is an important nutrient strategy for alpine grassland in northwestern China to improve productivity for livestock needs. A field experiment was conducted in a semi-arid alpine grassland in northwestern China to investigate the effect of N addition rates on soil N2O emissions over the growing seasons of 2017 and 2018. Treatments included six N addition rates (0, 10, 30, 60, 120, 240 kg N ha(-1) y(-1)), which were applied before each growing season. The N2O fluxes increased with N addition rates and showed different episodic changes between the two growing seasons. In 2017, the maximum N2O flux rate occurred within 2 weeks following N addition. In 2018, however, the maximum N2O flux rate occurred later in the growing season due to a heavy rainfall event. Growing season cumulative N2O emissions ranged between 0.32 and 1.11 kg N ha(-1), and increased linearly with N addition rates. Increasing N addition rates over 60 kg N ha(-1) yr(-1) did not further increase plant above-ground biomass. The inter-annual variability of N2O flux suggests the importance of soil moisture in affecting N2O emissions. It is particularly important to avoid over-applying N nutrients beyond plant needs to reduce its negative effect on the environment while maintaining livestock productivity. The N2O flux rate increased with soil dissolved organic carbon (DOC) and soil pH. These results suggest the optimal N addition rate to the livestock grassland in this region should be 60 kg N ha(-1) yr(-1).
英文关键词	alpine grassland nitrogen addition nitrous oxide emission factor semi-arid
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000688814000001
WOS关键词	N2O EMISSIONS ; GRAZED GRASSLAND ; INNER-MONGOLIA ; SOIL-MOISTURE ; FLUXES ; FERTILIZER ; CO2 ; DEPOSITION ; DENITRIFICATION ; MANAGEMENT
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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/2XILL650/368554
作者单位	[Wu, Yufeng; Cao, Dengchao; Li, Lei; Li, Xiangyi; Zeng, Fanjiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Wu, Yufeng; Cao, Dengchao; Li, Lei; Li, Xiangyi; Zeng, Fanjiang] Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Cele 848300, Peoples R China; [Wu, Yufeng; Cao, Dengchao; Li, Lei; Li, Xiangyi; Zeng, Fanjiang] Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China; [Wu, Yufeng; Cao, Dengchao; Li, Lei; Li, Xiangyi; Zeng, Fanjiang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Gao, Xiaopeng] Univ Manitoba, Dept Soil Sci, Winnipeg, MB R3T 2N2, Canada
推荐引用方式 GB/T 7714	Wu, Yufeng,Gao, Xiaopeng,Cao, Dengchao,et al. Nitrous Oxide Emissions from an Alpine Grassland as Affected by Nitrogen Addition[J]. 中国科学院新疆生态与地理研究所,2021,12(8).
APA	Wu, Yufeng,Gao, Xiaopeng,Cao, Dengchao,Li, Lei,Li, Xiangyi,&Zeng, Fanjiang.(2021).Nitrous Oxide Emissions from an Alpine Grassland as Affected by Nitrogen Addition.ATMOSPHERE,12(8).
MLA	Wu, Yufeng,et al."Nitrous Oxide Emissions from an Alpine Grassland as Affected by Nitrogen Addition".ATMOSPHERE 12.8(2021).