干旱区生态环境知识资源中心(Arid): Dew measurement and estimation of rain-fed jujube (Zizyphus jujube Mill) in a semi-arid loess hilly region of China

Arid

	Dew measurement and estimation of rain-fed jujube (Zizyphus jujube Mill) in a semi-arid loess hilly region of China
	Wang Xing; Gao Zhiyong; Wang Youke; Wang Zhi; Jin Shanshan
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2017
卷号	9 期号:4 页码:547-557
英文摘要	Dew is an important water source for plants in arid and semi-arid regions. However, information on dew is scarce in such regions. In this study, we explored dew formation, amount, and duration of rain-fed jujube (Zizyphus jujube Mill) trees in a semi-arid loess hilly region of China (i.e., Mizhi County). The data included dew intensity and duration, relative humidity, temperature, and wind speed measured from 26 July to 23 October, 2012 and from 24 June to 17 October, 2013 using a micro-climate system (including dielectric leaf wetness sensors, VP-3 Relative Humidity/Temperature Sensor, High Resolution Rain Gauge, and Davis Cup Anemometer). The results show that atmospheric conditions of relative humidity of >78% and dew point temperature of 1°C-3°C are significantly favorable to dew formation. Compared with the rainfall, dew was characterized by high frequency, strong stability, and long duration. Furthermore, heavy dew accounted for a large proportion of the total amount. The empirical models (i.e., relative humidity model (RH model) and dew point depression model (DPD model)) for daily dew duration estimation performed well at 15-min intervals, with low errors ranging between 1.29 and 1.60 h, respectively. But it should be noted that the models should be calibrated firstly by determining the optimal thresholds of relatively humidity for RH model and dew point depression for DPD model. For rain-fed jujube trees in the semi-arid loess hilly regions of China, the optimal threshold of relative humidity was 78%, and the optimal upper and lower thresholds of dew point depression were 1°C and 5°C, respectively. The study further demonstrates that dew is an important water resource that cannot be ignored for rain-fed jujube trees and may affect water balance at regional scales.
英文关键词	dew formation dew amount dew duration jujube plantation empirical models Loess Plateau
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6020591
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335830
作者单位	Wang Xing, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shanxi 712100, China.; Wang Youke, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shanxi 712100, China.; Gao Zhiyong, Department of Water Conservancy, Yangling Vocational & Technological College, Yangling, Shanxi 712100, China.; Wang Zhi, Department of Earth and Environmental Sciences, California State University, California, 93740, USA.; Jin Shanshan, College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shanxi 712100, China.
推荐引用方式 GB/T 7714	Wang Xing,Gao Zhiyong,Wang Youke,et al. Dew measurement and estimation of rain-fed jujube (Zizyphus jujube Mill) in a semi-arid loess hilly region of China[J],2017,9(4):547-557.
APA	Wang Xing,Gao Zhiyong,Wang Youke,Wang Zhi,&Jin Shanshan.(2017).Dew measurement and estimation of rain-fed jujube (Zizyphus jujube Mill) in a semi-arid loess hilly region of China.Journal of Arid Land,9(4),547-557.
MLA	Wang Xing,et al."Dew measurement and estimation of rain-fed jujube (Zizyphus jujube Mill) in a semi-arid loess hilly region of China".Journal of Arid Land 9.4(2017):547-557.