Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe

doi:10.1016/j.jes.2016.09.013

	Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe
	Wang, Liqin 1,2; Qi, Yuchun 1; Dong, Yunshe 1; Peng, Qin 1; Guo, Shufang 1,2; He, Yunlong 1,2; Li, Zhaolin 1,2
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2017-06-01
卷号	56 页码:192-201
关键词	Temperate semi-arid steppe Nitrous oxide Freeze-thawing period Water and nitrogen addition
ISSN号	1001-0742
DOI	10.1016/j.jes.2016.09.013
通讯作者	Qi, Yuchun(qiyc@igsnrr.ac.cn)
英文摘要	High nitrous oxide (N2O) emissions during freeze-thawing period (FTP) have been observed in many different ecosystems. However, the knowledge about the dynamic of soil N2O emissions and its main driving mechanism during the freeze-thawing processes in grassland ecosystem is still limited. An in-situ experiment was conducted during the FTP on the sites with 0 and 15% surplus of the average rainfall and two levels of N addition (0,10 g N/(m(2).year)) during growing season (marked as W0N0, W15N0, W0N10, W15N10, respectively) to explore the effects of water and N background on soil N2O emissions during FTPs and the relationship between soil N2O emissions and environmental factors. The results indicated that water and N treatments conducted during growing season did not show significant effect on the N2O effluxes of FTP, but the soil mineral N contents of W0N10 treatment were significantly higher than those of W0N0, W15N0, W15N10 treatments (p < 0.05). The soil PLFA concentrations of microbial groups monitored during 2015 spring freeze-thawing period (2015S-FTP) were lower than those during winter freeze-thawing period of 2014 (2014W-FTP), while cumulative soil N2O emissions of 2015S-FTP were higher than those of 2014W-FTP. The correlations between soil N2O effluxes and most of the measured environmental factors were insignificant, multiple stepwise regression analysis indicated that the soil temperature, soil NH4+-N content and air temperature were the major environmental factors which significantly influenced the N2O effluxes during 2014W-FTP, and air temperature and soil water content were the significant influencing factors during 2015S-FTP. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[41373084] ; National Natural Science Foundation of China[41330528] ; National Natural Science Foundation of China[41203054]
WOS关键词	NITROUS-OXIDE EMISSIONS ; COLORADO SHORTGRASS STEPPE ; INNER-MONGOLIA ; AGRICULTURAL SOILS ; CARBON-DIOXIDE ; SPRING THAW ; GRASSLAND ; CHINA ; CO2 ; DEPOSITION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000404127500022
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/63087]
专题	中国科学院地理科学与资源研究所
通讯作者	Qi, Yuchun
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Liqin,Qi, Yuchun,Dong, Yunshe,et al. Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2017,56:192-201.
APA	Wang, Liqin.,Qi, Yuchun.,Dong, Yunshe.,Peng, Qin.,Guo, Shufang.,...&Li, Zhaolin.(2017).Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe.JOURNAL OF ENVIRONMENTAL SCIENCES,56,192-201.
MLA	Wang, Liqin,et al."Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe".JOURNAL OF ENVIRONMENTAL SCIENCES 56(2017):192-201.