Spatial variability of leaf wetness under different soil water conditions in rainfed jujube (Ziziphus jujuba Mill.) in the loess hilly region, China

作     者：GAO Zhiyong WANG Xing GAO Zhiyong;WANG Xing

作者机构：State Key Laboratory of Eco-hydraulics in Northwest Arid Region of ChinaXi'an University of TechnologyXi'an 710048China School of AgricultureNingxia UniversityYinchuan 750021China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2022年第14卷第1期

页      面：70-81页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0709[理学-地质学] 0708[理学-地球物理学] 09[农学] 0815[工学-水利工程] 0705[理学-地理学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：funded by the National Natural Science Foundation of China(32060301) 

主　　题：canopy position leaf wetness rainfed jujube soil water condition loess hilly region 

摘      要：Leaf wetness provides a wide range of benefits not only to leaves,but also to ecosystems and *** regulates canopy eco-hydrological processes and drives spatial differences in hydrological *** spite of these functions,little remains known about the spatial distribution of leaf wetness under different soil water *** wetness measurements at the top(180 cm),middle(135 cm),and bottom(85 cm)of the canopy positions of rainfed jujube(Ziziphus jujuba Mill.)in the Chinese loess hilly region were obtained along with meteorological and soil water conditions during the growing seasons in 2019 and *** soil water non-deficit condition,the frequency of occurrence of leaf wetness was 5.45%higher at the top than at the middle and bottom of the canopy *** frequency of occurrence of leaf wetness at the top,middle and bottom of the canopy positions was over 80%at 17:00‒18:00(LST).However,the occurrence of leaf wetness at the top was earlier than those at the middle and bottom of the canopy ***,leaf drying at the top was also latter than those at the middle and bottom of the canopy *** wetness duration at the middle was similar to that at the bottom of the canopy position,but about 1.46-3.01 h less than that at the *** soil water deficit condition,the frequency of occurrence of leaf wetness(4.92%-45.45%)followed the order of topmiddlebottom of the canopy *** the onset of leaf wetness was delayed,the onset of wet leaf drying was advanced and the leaf wetness duration was *** wetness duration at the top was linearly related(R^(2)0.70)to those at the middle and bottom of the canopy positions under different soil water *** conclusion,the hydrological processes at canopy surfaces of rainfed jujube depended on the position of leaves,thus adjusting canopy structure to redistribute hydrological process is a way to meet the water need of jujube.