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	Influence of environmental, root, and stand parameters on soil surface CO2 efflux in a Populus euphratica of desert forest in extreme arid region
	Chang, ZongQiang; Feng, Qi; Su, YongHong; Si, JianHua; Xi, HaiYang; Cao, ShengKui; Guo, Rui
发表日期	2009
ISSN	1674-3822
起始页码	348
结束页码	355
卷号	1 期号:4
英文摘要	Spatial variation in soil surface CO2 efflux was measured in a stand of Populus euphratica in the Ejina Oasis of desert riparian forest in the extreme arid region in northwestern China from April 2007 through October 2007. Measurements were taken with a gas-exchange analyzer linked to a soil-respiration chamber. The mean soil CO2 efflux in the stand was 2.71 mu mol/(m(2).s) during the growing season and 1.38 mu mol/(m(2.)s) in the nongrowing season. The seasonal maximum (end of May through early June) and minimum (October) CO2 efflux were 3.38 and 0.69 mu mol/(m(2).s), respectively. The diurnal fluctuation of CO2 efflux was relatively small (< 20 percent), with the minimum appearing around 05:00 and the maximum around 15:00. Linear regression analysis showed soil-surface CO2 efflux to be most highly correlated with soil temperature (R-2=0.435) and soil moisture (R-2=0.213). When all variables were considered simultaneously, only soil temperature (R-2=0.378), soil moisture (R-2=0.147), and root volume density (R-2=0.021) explained a significant amount of variance in soil surface CO2 efflux. Stand volumes were not correlated with soil CO2 efflux on our sites.
英文关键词	soil surface CO2 efflux; Populus euphratica Oliv; parameters; Ejina Oasis
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS记录号	WOS:000422272500008
来源期刊	SCIENCES IN COLD AND ARID REGIONS
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/239392
作者单位	[Chang, ZongQiang; Feng, Qi; Su, YongHong; Si, JianHua; Xi, HaiYang; Cao, ShengKui; Guo, Rui] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Alashan Desert Eco Hydrol Expt Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Chang, ZongQiang,Feng, Qi,Su, YongHong,et al. Influence of environmental, root, and stand parameters on soil surface CO2 efflux in a Populus euphratica of desert forest in extreme arid region[J]. 中国科学院西北生态环境资源研究院,2009,1(4).
APA	Chang, ZongQiang.,Feng, Qi.,Su, YongHong.,Si, JianHua.,Xi, HaiYang.,...&Guo, Rui.(2009).Influence of environmental, root, and stand parameters on soil surface CO2 efflux in a Populus euphratica of desert forest in extreme arid region.SCIENCES IN COLD AND ARID REGIONS,1(4).
MLA	Chang, ZongQiang,et al."Influence of environmental, root, and stand parameters on soil surface CO2 efflux in a Populus euphratica of desert forest in extreme arid region".SCIENCES IN COLD AND ARID REGIONS 1.4(2009).