气候变化领域集成服务门户(CCPortal): Nighttime sap flow and its driving forces for Populus euphratica in a desert riparian forest, Northwest China

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DOI	10.1007/s40333-015-0009-0
	Nighttime sap flow and its driving forces for Populus euphratica in a desert riparian forest, Northwest China
	Si Jianhua; Feng Qi; Yu Tengfei; Zhao Chunyan
发表日期	2015
ISSN	1674-6767
EISSN	2194-7783
卷号	7 期号:5
英文摘要	Nighttime sap flow is a potentially important factor that affects whole-plant water balance and water-use efficiency (WUE). Its functions include predawn disequilibrium between plant and soil water potentials as well as between the increments of oxygen supply and nutrient uptake. However, main factors that drive nighttime sap flow remain unclear, and researches related to the relationship between nighttime sap flow velocity and environmental factors are limited. Accordingly, we investigated the variations in the nighttime sap flow of Populus euphratica in a desert riparian forest of an extremely arid region, Northwest China. Results indicated that P. euphratica sap flow occurred throughout the night during the growing season because of the partial stomata opening. Nighttime sap flow for the P. euphratica forest accounted for 31%-47% of its daily sap flow during the growing season. The high value of nighttime sap flow could be the result of high stomatal conductance and could have significant implications for water budgets. Throughout the whole growing season, nighttime sap flow velocity of P. euphratica was positively correlated with the vapor pressure deficit (VPD), air temperature and soil water content. We found that VPD and soil water content were the main driving factors for nighttime sap flow of P. euphratica.
关键词	nighttime sap flow stomatal conductance vapor pressure deficit driving factors desert riparian forest
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	JOURNAL OF ARID LAND
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/111801
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Alxa Desert Ecohydrol Expt Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Si Jianhua,Feng Qi,Yu Tengfei,et al. Nighttime sap flow and its driving forces for Populus euphratica in a desert riparian forest, Northwest China[J]. 中国科学院西北生态环境资源研究院,2015,7(5).
APA	Si Jianhua,Feng Qi,Yu Tengfei,&Zhao Chunyan.(2015).Nighttime sap flow and its driving forces for Populus euphratica in a desert riparian forest, Northwest China.JOURNAL OF ARID LAND,7(5).
MLA	Si Jianhua,et al."Nighttime sap flow and its driving forces for Populus euphratica in a desert riparian forest, Northwest China".JOURNAL OF ARID LAND 7.5(2015).