干旱区生态环境知识资源中心(Arid): Nighttime sap flow and its driving forces for Populus euphratica in a desert riparian forest, Northwest China

Arid

	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
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2015
卷号	7 期号:5 页码:665-674
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.
英文关键词	nighttime sap flow stomatal conductance vapor pressure deficit driving factors desert riparian forest
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:5474545
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335520
作者单位	Si Jianhua, Alxa Desert Eco-hydrology Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Gansu Hydrology and Water Resources Engineering Center, Lanzhou, Gansu 730000, China.; Feng Qi, Alxa Desert Eco-hydrology Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Gansu Hydrology and Water Resources Engineering Center, Lanzhou, Gansu 730000, China.; Yu Tengfei, Alxa Desert Eco-hydrology Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Gansu Hydrology and Water Resources Engineering Center, Lanzhou, Gansu 730000, China.; Zhao Chunyan, Alxa Desert Eco-hydrology Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, 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],2015,7(5):665-674.
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),665-674.
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):665-674.