Synergistic effects of nitrogen amendments and ethylene on atmospheric methane uptake under a temperate old-growth forest

doi:10.1007/s00376-010-0071-7

	Synergistic effects of nitrogen amendments and ethylene on atmospheric methane uptake under a temperate old-growth forest
	Xu Xingkai 3; Han Lin 1,3; Luo Xianbao 1,3; Han Shijie 2
刊名	ADVANCES IN ATMOSPHERIC SCIENCES
	2011-07-01
卷号	28 期号:4 页码:843-854
关键词	Methane Uptake Ethylene Nitrogen Amendment Synergistic Effect Forest
ISSN号	0256-1530
DOI	10.1007/s00376-010-0071-7
英文摘要	An increase in atmospheric nitrogen (N) deposition can promote soil acidification, which may increase the release of ethylene (C2H4) under forest floors. Unfortunately, knowledge of whether increasing N deposition and C2H4 releases have synergistic effects on soil methane (CH4) uptake is limited and certainly deserves to be examined. We conducted some field measurements and laboratory experiments to examine this issue. The addition of (NH4)(2)SO4 or NH4Cl at a rate of 45 kg N ha(-1) yr(-1) reduced the soil CH4 uptake under a temperate old-growth forest in northeast China, and there were synergistic effects of N amendments in the presence of C2H4 concentrations equal to atmospheric CH4 concentration on the soil CH4 uptake, particularly in the NH4Cl-treated plots. Effective concentrations of added C2H4 on the soil CH4 uptake were smaller in NH (4) (+) -treated plots than in KNO3-treated plots. The concentration of ca 0.3 A mu l C2H4 L-1 in the headspace gases reduced by 20% soil atmospheric CH4 uptake in the NH4Cl-treated plots, and this concentration was easily produced in temperate forest topsoils under short-term anoxic conditions. Together with short-term stimulating effects of N amendments and soil acidification on C2H4 production from forest soils, our observations suggest that knowledge of synergistic effects of NH (4) (+) , rather than NO (3) (-) , amendments and C2H4 on the in situ soil CH4 uptake is critical for understanding the role of atmospheric N deposition and cycling of C2H4 under forest floors in reducing global atmospheric CH4 uptake by forests. Synergistic functions of NH (4) (+) -N deposition and C2H4 release due to soil acidification in reducing atmospheric CH4 uptake by forests are discussed.
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000291994000011
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121897]
专题	中国科学院沈阳应用生态研究所
通讯作者	Xu Xingkai
作者单位	1.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Xu Xingkai,Han Lin,Luo Xianbao,et al. Synergistic effects of nitrogen amendments and ethylene on atmospheric methane uptake under a temperate old-growth forest[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2011,28(4):843-854.
APA	Xu Xingkai,Han Lin,Luo Xianbao,&Han Shijie.(2011).Synergistic effects of nitrogen amendments and ethylene on atmospheric methane uptake under a temperate old-growth forest.ADVANCES IN ATMOSPHERIC SCIENCES,28(4),843-854.
MLA	Xu Xingkai,et al."Synergistic effects of nitrogen amendments and ethylene on atmospheric methane uptake under a temperate old-growth forest".ADVANCES IN ATMOSPHERIC SCIENCES 28.4(2011):843-854.