干旱区生态环境知识资源中心(Arid): Non-rainfall water contributions to dryland jujube plantation evapotranspiration in the Hilly Loess Region of China

Arid

DOI	10.1016/j.jhydrol.2020.124604
	Non-rainfall water contributions to dryland jujube plantation evapotranspiration in the Hilly Loess Region of China
	Gao, Zhiyong 1,2; Shi, Wenjuan 1; Wang, Xing 3; Wang, Youke 2,4,5
通讯作者	Shi, Wenjuan ; Wang, Xing
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	583
英文摘要	Non-rainfall water inputs (NRWIs) provide crucial water resources for dryland ecosystems in arid and semi-arid regions. However, little is known about the quantitative characteristics and formation of NRWIs, and the relative importance of NRWIs as water sources in a dryland jujube (Ziziphus jujuba Mill.) plantation in the Hilly Loess Region of China. The objectives of this study were to determine the characteristics of NRWIs during the jujube growing season with regard to amount, duration, and contributions to transpiration, evaporation, and evapotranspiration. Dew intensity and duration were monitored using dielectric leaf wetness sensors, Also sap flow, soil water content, soil temperature, and meteorological variables were measured during the 2017 and 2018 growing seasons. NRWIs were found to be composed of canopy dew (CD) and water vapor adsorption (WVAS) in the 0-5 cm soil layer, amounting to 75.218 mm in 2017 and 75.309 mm in 2018 (CD accounted for about 81% of NRWI). Daily average CD was significantly greater than WVAS (P < 0.05), and CD duration was 2.09-9.14 h more than WVAS duration (P < 0.05). The CD rate and frequency generally exceeded that of WVAS. CD occurred from 19:00 to 9:00. WVAS mainly occurred from 6:30 to 9:00. CD reduced nocturnal sap flow by 7.36-55.64%, but increased soil water storage (in the 5-100 cm root zone) by 0.274-0.717 mm. WVAS had no effect on soil water evaporation. Over the entire growing season, the ratio of CD to total transpiration was 0.218 in 2017 and 0.258 in 2018, and the ratio of WVAS to soil water evaporation was 0.082 in both years. NRWIs occurred more frequently and were quantitatively more stable than rainfall events. Their contributions to evapotranspiration reached a maximum value of 0.184 in 2018. NRWIs are important components of the hydrological cycle in this region, and probably have potential positive ecological effects on dryland jujube plantations in the Hilly Loess Region of China.
英文关键词	Non-rainfall water input Canopy dew Water vapor adsorption Transpiration Evaporation
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000527388300063
WOS关键词	GARAJONAY NATIONAL-PARK ; DEW FORMATION ; SAP FLOW ; MILL. PLANTATIONS ; SOIL-MOISTURE ; FOG WATER ; SEMIARID REGION ; FOLIAR UPTAKE ; FOREST ; TRANSPIRATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314998
作者单位	1.Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg China, Xian 710048, Shaanxi, Peoples R China; 2.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China; 3.Ningxia Univ, Sch Agr, Yinchuan 750021, Ningxia Hui Aut, Peoples R China; 4.Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, Yangling 712100, Shaanxi, Peoples R China; 5.Minist Educ, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Gao, Zhiyong,Shi, Wenjuan,Wang, Xing,et al. Non-rainfall water contributions to dryland jujube plantation evapotranspiration in the Hilly Loess Region of China[J]. 西北农林科技大学,2020,583.
APA	Gao, Zhiyong,Shi, Wenjuan,Wang, Xing,&Wang, Youke.(2020).Non-rainfall water contributions to dryland jujube plantation evapotranspiration in the Hilly Loess Region of China.JOURNAL OF HYDROLOGY,583.
MLA	Gao, Zhiyong,et al."Non-rainfall water contributions to dryland jujube plantation evapotranspiration in the Hilly Loess Region of China".JOURNAL OF HYDROLOGY 583(2020).