IGSNRR OpenIR
Effects and mechanism of freeze-thawing cycles on the soil N_2O fluxes in the temperate semi-arid steppe
Wang Liqin; Qi Yuchun; Dong Yunshe; Peng Qin; Guo Shufang; He Yunlong; Li Zhaolin
2017
Source PublicationJournal of Environmental Sciences
ISSN1001-0742
Volume56Pages:192
AbstractHigh 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.
Language英语
Funding Project[National Natural Science Foundation of China]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/108756
Collection中国科学院地理科学与资源研究所
Affiliation中国科学院地理科学与资源研究所
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Wang Liqin,Qi Yuchun,Dong Yunshe,et al. Effects and mechanism of freeze-thawing cycles on the soil N_2O fluxes in the temperate semi-arid steppe[J]. Journal of Environmental Sciences,2017,56:192.
APA Wang Liqin.,Qi Yuchun.,Dong Yunshe.,Peng Qin.,Guo Shufang.,...&Li Zhaolin.(2017).Effects and mechanism of freeze-thawing cycles on the soil N_2O fluxes in the temperate semi-arid steppe.Journal of Environmental Sciences,56,192.
MLA Wang Liqin,et al."Effects and mechanism of freeze-thawing cycles on the soil N_2O fluxes in the temperate semi-arid steppe".Journal of Environmental Sciences 56(2017):192.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang Liqin]'s Articles
[Qi Yuchun]'s Articles
[Dong Yunshe]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang Liqin]'s Articles
[Qi Yuchun]'s Articles
[Dong Yunshe]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang Liqin]'s Articles
[Qi Yuchun]'s Articles
[Dong Yunshe]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.