气候变化领域集成服务门户(CCPortal): Sap-flow measurement and scale transferring from sample trees to entire forest stand of Populus euphratica in desert riparian forest in extreme arid region

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	Sap-flow measurement and scale transferring from sample trees to entire forest stand of Populus euphratica in desert riparian forest in extreme arid region
	Si, JianHua; Feng, Qi; Xi, HaiYang; Chang, ZongQiang; Su, YongHong; Zhang, Kai
发表日期	2009
ISSN	1674-3822
起始页码	258
结束页码	266
卷号	1 期号:3
英文摘要	Understanding how the transpiration of this vegetation type responds to environmental stress is important for determining the water- balance dynamics of the riparian ecosystem threatened by groundwater depletion. Transpiration and sap flow were measured using the heat-pulse technique. The results were then projected up to the stand level to investigate the stand's water-use in relation to climate forcing in the desert riparian forest in an extreme arid region. This study took place from April through October 2003 and from May through October 2004. The experimental site was selected in the Populus euphratica Forest Reserve (101 degrees 10' E, 41 degrees 59' N) in Ejina county, in the lower Heihe River basin, China. The sapwood area was used as a scalar to extrapolate the stand-water consumption from the whole trees' water consumption measured by the heat-pulse velocity recorder (HPVR). Scale transferring from a series of individual trees to a stand was done according to the existing natural variations between trees under given environmental conditions. The application of the biometric parameters available from individual tree and stand levels was proved suitable for this purpose. A significant correlation between the sapwood area and tree diameter at breast height (DBH) was found. The prediction model is well fitted by the power model. On the basis of the prediction model, the sapwood area can be calculated by DBH. The sap-flow density can then be used to extrapolate the stand-water use by means of a series of mathematical models.
英文关键词	sap flow; heat-pulse technique; sapwood area; scale transferring; extreme arid region; Populus euphratica
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS关键词	HEAT-PULSE TECHNIQUE ; TRANSPIRATION ; WATER ; INTEGRATION ; VELOCITY ; PINE
WOS记录号	WOS:000422253500008
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/239391
作者单位	[Si, JianHua; Feng, Qi; Xi, HaiYang; Chang, ZongQiang; Su, YongHong; Zhang, Kai] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China; [Zhang, Kai] China Meteorol Adm, Inst Arid Meteorol, Lanzhou 730020, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Si, JianHua,Feng, Qi,Xi, HaiYang,et al. Sap-flow measurement and scale transferring from sample trees to entire forest stand of Populus euphratica in desert riparian forest in extreme arid region[J]. 中国科学院西北生态环境资源研究院,2009,1(3).
APA	Si, JianHua,Feng, Qi,Xi, HaiYang,Chang, ZongQiang,Su, YongHong,&Zhang, Kai.(2009).Sap-flow measurement and scale transferring from sample trees to entire forest stand of Populus euphratica in desert riparian forest in extreme arid region.SCIENCES IN COLD AND ARID REGIONS,1(3).
MLA	Si, JianHua,et al."Sap-flow measurement and scale transferring from sample trees to entire forest stand of Populus euphratica in desert riparian forest in extreme arid region".SCIENCES IN COLD AND ARID REGIONS 1.3(2009).