Quantification of irrigation water transport processes in ZiZiphus jujuba garden using water stable isotopes  

作　　者：ZHONG Xiaofei ZHANG Mingjun CHE Cunwei LIU Zechen LI Beibei ZHANG Yuanyuan 

机构地区：[1]College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730000,China [2]Key Laboratory of Resource Environment and Sustainable Development of Oasis,Lanzhou 730000,China

出　　处：《Journal of Mountain Science》2024年第10期3263-3274,共12页山地科学学报（英文）

基　　金：funded by the National Natural Science Foundation of China(Grant No.42071047 and 41771035);the Basic Research Innovation Group Project of Gansu Province(Grant No.22JR5RA129).

摘　　要：ZiZiphus jujuba,which is native to China,has become one of the main crops widely planted in the western Loess Plateau because of its drought and flood-tolerance,adaptability,and higher nutritional value of the fruit.The irrigation water infiltration in Z.jujuba gardens is complex,and understanding its mechanisms is essential for efficient water use and sustainable agriculture.This knowledge helps ensure the long-term success of jujuba cultivation.This paper describes a field experiment that investigates the infiltration process of irrigation water from Z.jujuba garden and quantifies the contribution of irrigation water to soil water at different depths using the MixSIAR model.According to the FC(Field water holding Capacity)of Z.jujuba,irrigation experiments with three volumes of 80%FC,60%FC,and 40%FC are set up in this study.The study finds that water retention is better in Z.jujuba garden soils with a higher proportion of coarse gravel in the soil particle composition.Soil water content exhibits a gradient change after irrigation,with deeper wetting front transport depth observed with increased irrigation water.Additionally,there is correlation between soil temperature and soil water content.The soil water in Z.jujuba garden generally exhibits a preferential flow signal in the 0-40 cm range.Below 40 cm,a piston flow pattern dominates.The rate of soil water infiltration increases with the amount of irrigation water.In the 0-40 cm range of the soil vertical profile,irrigation water was the main contributor to soil water.Z.jujuba demonstrated flexibility in water uptake,primarily absorbing soil water at depths of 0-40 cm.For optimal growth of Z.jujuba at this stage,40%FC irrigation is recommended.The results are expected to be valuable future irrigation practices and land use planning for Z.jujuba garden in arid zones,supporting sustainable agricultural development and water management.

关 键 词：Water stable isotopes Different irrigation volumes ZiZiphus jujuba Irrigation water infiltration process MixSIAR model 

分 类 号：S665.1[农业科学—果树学] S274[农业科学—园艺学]