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Response of relative sap flow to meteorological factors under different soil moisture conditions in rainfed jujube (Ziziphus jujuba Mill.) plantations in semiarid Northwest China
Chen, Dianyu1; Wang, Youke1,2; Liu, Shouyang1; Wei, Xinguang1; Wang, Xing3
2014-04-01
Source PublicationAGRICULTURAL WATER MANAGEMENT
Volume136Pages:23-33
AbstractAs a drought tolerant plant, jujube (Ziziphus jujuba Mill.) is commonly planted in semiarid Northwest China under rainfed conditions. To clarify the response of water use to climatic conditions, sap flow (SF) in 8 non-irrigated jujube trees was monitored using thermal dissipation probes. Also meteorological variables, soil water content, crown projection area and leaf area index were measured during the 2012 growth season. Based on relative extractable water (theta(e)), soil moisture conditions were classified into water stress (theta(e) < 0.4) and non-water stress (theta(e) > 0.4) conditions. Since leaf area (LA) significantly influences SF, relative sap flow (defined as SFR = SF/LA) was used to analyze its relationships with selected meteorological factors. Obvious differences were noted between responses of SFR and its sensitivity to meteorological factors under the two different soil moisture conditions. Daily SFR was linearly related with solar radiation (R-s) but logarithmically related with vapor pressure deficit (VPD), variable of transpiration (VT) and reference crop evapotranspiration under both soil moisture conditions. Hourly SFR was linearly related with R-s, VPD and VT at theta(e) > 0.4, while, at theta(e) < 0.4, it was lineary related with these variables to a threshold value, but it tracked a horizontal curve thereafter. On the average, the change in SFR with meteorological factors was classified into two on the basis of the time of day. The first characteristic change was during 00:00-15:00 h and the second during the rest of the day. There were significant differences in SFR dynamics between the two periods of the day under every soil moisture conditions, while, significant differences in the first periods but few differences in the second periods of SFR dynamics between two soil moisture conditions. The results of the study could be used to fine-tune transpiration modeling for efficient soil water management in rainfed jujube plantations in semiarid regions. (C) 2014 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordRelative Sap Flow Meteorological Factor Soil Moisture Rainfed Jujube Plantation Semiarid Region
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS Subject ExtendedAgriculture ; Water Resources
WOS KeywordHEAT-BALANCE METHOD ; LEAF-AREA INDEX ; TREE WATER-USE ; CANOPY CONDUCTANCE ; LOESS PLATEAU ; STOMATAL CONDUCTANCE ; ARID REGION ; GROWTH-STAGES ; TRANSPIRATION ; FOREST
Indexed BySCI
Language英语
WOS SubjectAgronomy ; Water Resources
WOS IDWOS:000334001200003
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68458
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Youke
Affiliation1.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
3.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Peoples R China
Recommended Citation
GB/T 7714
Chen, Dianyu,Wang, Youke,Liu, Shouyang,et al. Response of relative sap flow to meteorological factors under different soil moisture conditions in rainfed jujube (Ziziphus jujuba Mill.) plantations in semiarid Northwest China[J]. AGRICULTURAL WATER MANAGEMENT,2014,136:23-33.
APA Chen, Dianyu,Wang, Youke,Liu, Shouyang,Wei, Xinguang,&Wang, Xing.(2014).Response of relative sap flow to meteorological factors under different soil moisture conditions in rainfed jujube (Ziziphus jujuba Mill.) plantations in semiarid Northwest China.AGRICULTURAL WATER MANAGEMENT,136,23-33.
MLA Chen, Dianyu,et al."Response of relative sap flow to meteorological factors under different soil moisture conditions in rainfed jujube (Ziziphus jujuba Mill.) plantations in semiarid Northwest China".AGRICULTURAL WATER MANAGEMENT 136(2014):23-33.
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