气候变化领域集成服务门户(CCPortal): Nitrogen deposition increases global grassland N2O emission rates steeply: A meta-analysis

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DOI	10.1016/j.catena.2020.105105
	Nitrogen deposition increases global grassland N2O emission rates steeply: A meta-analysis
	Du, Yangong; Ke, Xun; Li, Jingmei; Wang, Yunying; Cao, Guangmin; Guo, Xiaowei; Chen, Kelong
通讯作者	Du, YG ; Chen, KL (通讯作者)，Qinghai Normal Univ, Coll Geosci, Xining 810005, Peoples R China. ; Du, YG (通讯作者)，Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Reg, Xining 810008, Peoples R China.
发表日期	2021
ISSN	0341-8162
EISSN	1872-6887
卷号	199
英文摘要	Nitrous oxide (N2O) emissions in grasslands contribute considerably to global warming and are influenced substantially by nitrogen deposition. However, the impacts of N deposition impact on soil N2O emission rates across global grassland remain unclear due to spatial heterogeneity. Here, we synthesized data from 34 published studies to clarify the response of N2O emission rates to N deposition across global grassland. The priming effect size of N deposition on global grassland N2O emission rate was 1.64 +/- 0.14 (95% confidence interval 1.36-1.92, P < 0.0001). Categorical variable analysis revealed that various N types influenced effect size significantly, in the orders of urine > slurry > dung > NH4SO4 > NH4NO3 > urea. Furthermore, explained heterogeneity analysis revealed that air temperature, nitrogen dose, precipitation and soil bulk density was positively associated with effect size. In addition, air temperature, altitude, pH and nitrogen dose were the major factors influencing effect size. Path analysis also indicated that N dose took a significant role on direct effect (P < 0.01), the indirect effects were relative higher of soil pH, air temperature and altitude through soil bulk. We provide a key insight that continuous increase in N deposition would significantly stimulate grasslands N2O emission. Controlling greenhouse effect and soil acidification would mitigate the priming effect availably.
关键词	OXIDE EMISSIONS ALPINE MEADOW SPECIES RICHNESS N DEPOSITION URINE FLUXES ABUNDANCE NITRIFICATION COMMUNITIES IMPACT
英文关键词	Global grassland; Nitrogen deposition; Effect size; N2O emission
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000608022600020
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254090
作者单位	[Du, Yangong; Li, Jingmei; Chen, Kelong] Qinghai Normal Univ, Coll Geosci, Xining 810005, Peoples R China; [Du, Yangong; Ke, Xun; Wang, Yunying; Cao, Guangmin; Guo, Xiaowei] Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Reg, Xining 810008, Peoples R China; [Li, Jingmei] Qinghai Acad Social Sci, Xining 810012, Peoples R China
推荐引用方式 GB/T 7714	Du, Yangong,Ke, Xun,Li, Jingmei,et al. Nitrogen deposition increases global grassland N2O emission rates steeply: A meta-analysis[J]. 中国科学院西北生态环境资源研究院,2021,199.
APA	Du, Yangong.,Ke, Xun.,Li, Jingmei.,Wang, Yunying.,Cao, Guangmin.,...&Chen, Kelong.(2021).Nitrogen deposition increases global grassland N2O emission rates steeply: A meta-analysis.CATENA,199.
MLA	Du, Yangong,et al."Nitrogen deposition increases global grassland N2O emission rates steeply: A meta-analysis".CATENA 199(2021).