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The natural abundance of stable water isotopes method may overestimatedeep-layer soil water use by trees

文献类型：期刊论文

作者Wang, Shaofei6; Gao, Xiaodong4,5; Yang, Min6; Huo, Gaopeng3; Song, Xiaolin2; Siddique, Kadambot H. M.1; Wu, Pute4,5; Zhao, Xining4,5
刊名HYDROLOGY AND EARTH SYSTEM SCIENCES
出版日期2023-01-04
卷号27期号:1页码:123-137
ISSN号1027-5606
DOI10.5194/hess-27-123-2023
通讯作者Gao, Xiaodong(gao_xiaodong@nwafu.edu.cn)
英文摘要Stable water isotopes have been used extensively to study the water use strategy of plants in various ecosystems. In deep vadose zone (DVZ) regions, the rooting depth of trees can reach several meters to tens of meters. However, the existence of roots in deep soils does not necessarily mean the occurrence of root water uptake, which usually occurs at a particular time during the growing season. Therefore, quantifying the contribution of deep-layer soil water (DLSW) in DVZ regions using the natural abundance of stable water isotopes may not be accurate because this method assumes that trees always extract shallow- and deep-layer soil water. We propose a multi-step method for addressing this issue. First, isotopic labeling in deep layers identifies whether trees absorb DLSW and determines the soil layer depths from which trees derive their water source. Next, we calculate water sources based on the natural abundance of stable isotopes in the soil layer determined above to quantify the water use strategy of trees. We also compared the results with the natural abundance of stable water isotopes method. The 11- and 17-year-old apple trees were taken as examples for analyses on China's Loess Plateau. Isotopic labeling showed that the water uptake depth of 11-year-old apple trees reached 300 cm in the blossom and young fruit (BYF) stage and only 100 cm in the fruit swelling (FSW) stage, whereas 17-year-old trees always consumed water from the 0-320 cm soil layer. Overall, apple trees absorbed the most water from deep soils (> 140 cm) during the BYF stage, and 17-year-old trees consumed more water in these layers than 11-year-old trees throughout the growing season. In addition, the natural abundance of stable water isotopes method overestimated the contribution of DLSW, especially in the 320-500 cm soil layer. Our findings highlight that determining the occurrence of root water uptake in deep soils helps to quantify the water use strategy of trees in DVZ regions.
WOS关键词UNSATURATED ZONE ; ROOTING DEPTH ; LOESS PLATEAU ; PLANT-WATER ; DROUGHT ; DYNAMICS ; GROUNDWATER ; RECHARGE ; PATTERNS ; OFFSETS
资助项目National Natural Science Foundation of China ; National Key Research and Development Program of China[42125705] ; Natural Science Basic Research Program of Shaanxi[2021YFD1900700] ; Shaanxi Key Research and Development Program[2021JC-19] ; Cyrus Tang Foundation[2020ZDLNY07-04] ; Cyrus Tang Foundation[2022NY-064]
WOS研究方向Geology ; Water Resources
语种英语
WOS记录号WOS:000907607400001
出版者COPERNICUS GESELLSCHAFT MBH
资助机构National Natural Science Foundation of China ; National Key Research and Development Program of China ; Natural Science Basic Research Program of Shaanxi ; Shaanxi Key Research and Development Program ; Cyrus Tang Foundation
源URL[http://ir.igsnrr.ac.cn/handle/311030/188869]  
专题中国科学院地理科学与资源研究所
通讯作者Gao, Xiaodong
作者单位1.Univ Western Australia, UWA Inst Agr, Perth, WA 6001, Australia
2.Northwest A&F Univ, Coll Hort, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
3.Hebei Agr Univ, Coll Land & Resources, Baoding 071001, Hebei, Peoples R China
4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
5.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
6.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Shaofei,Gao, Xiaodong,Yang, Min,et al. The natural abundance of stable water isotopes method may overestimatedeep-layer soil water use by trees[J]. HYDROLOGY AND EARTH SYSTEM SCIENCES,2023,27(1):123-137.
APA Wang, Shaofei.,Gao, Xiaodong.,Yang, Min.,Huo, Gaopeng.,Song, Xiaolin.,...&Zhao, Xining.(2023).The natural abundance of stable water isotopes method may overestimatedeep-layer soil water use by trees.HYDROLOGY AND EARTH SYSTEM SCIENCES,27(1),123-137.
MLA Wang, Shaofei,et al."The natural abundance of stable water isotopes method may overestimatedeep-layer soil water use by trees".HYDROLOGY AND EARTH SYSTEM SCIENCES 27.1(2023):123-137.

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来源：地理科学与资源研究所

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