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Soil-water interacting use patterns driven by Ziziphus jujuba on the Chenier Island in the Yellow River Delta, China

文献类型： 外文期刊

作者： Zhu, Jinfang 1 ; Liu, Jingtao 2 ; Lu, Zhaohua 1 ; Xia, Jiangbao 2 ; Sun, Jingkuan 2 ; Shao, Hongbo 3 ; Zhao, Yanyun 2 ;

作者机构： 1.China Univ Min & Technol, Inst Restorat Ecol, Beijing, Peoples R China

2.Binzhou Univ, Shandong Prov Key Lab Ecoenvironm Sci Yellow Rive, Binzhou, Shandong, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Nanjing, Jiangsu, Peoples R China

4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai, Peoples R China

关键词： Soil water content;O-18 stable oxygen isotopes;water use patterns;Yellow River Delta

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）

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收录情况： SCI

摘要： The determination of water use patterns of plants in a coastal ecosystem is critical to our understanding of local eco-hydrological processes and predicting trends in ecological succession under the background of global climate change. The water use patterns of Ziziphus jujuba, the dominant species on the Chenier Island in the Yellow River Delta, were examined following summer rainfall events. Stable oxygen isotope analysis was employed to analyze the effects of rainfall on the stable isotopic composition in potential water sources in Z. jujuba. The IsoSource model was used to estimate the contributions of potential water sources for xylem water in Z. jujuba. The results showed heavy rainfall could recharge both soil and groundwater but contributed little to the O-18 values in deep soil water (60-100cm) and groundwater. Light rainfall had an effect only on surface soil water (0-40cm). Z. jujuba mainly absorbed deep soil water on non-rainy days. Rainwater became the predominant water source for Z. jujuba during and immediately after heavy rainfall. Switching the plant's main water source between deep soil water and rainwater provided Z. jujuba with a competitive advantage and improved the water use efficiency of Z. jujuba in this coastal ecosystem.

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