文献类型： 外文期刊

作者： Liu, Jiao ¹ ; Zhao, Ying ² ; Wang, Yongdong ² ; Zhang, Jianguo ³ ; Xue, Jie ² ; Wang, Shunke ² ; Chang, Jingjing ⁷ ;

作者机构： 1.Xinjiang Acad Agr Sci, Res Inst Soil Fertilizer & Agr Water Conservat, Urumqi 830091, Peoples R China

2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Key Lab Ecol Safety & Sustainable Dev Arid Lands, Urumqi 830011, Peoples R China

3.Northwest Agr & Forestry Univ, Coll Resources & Environm, Yangling 712100, Peoples R China

4.Ludong Univ, Coll Resources & Environm Engn, Yantai 264025, Peoples R China

5.Cele Natl Stn Observat & Res Desert Grassland Ecos, Hetian 848300, Peoples R China

6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

7.Xinjiang Univ, Coll Ecol & Environm, Urumqi 830046, Peoples R China

关键词： Taklimakan Desert Highway shelterbelt; Woody halophyte; Saline -tolerant plant; Sap flow; Irrigation regimes

期刊名称：ECOHYDROLOGY & HYDROBIOLOGY （ 影响因子：2.6； 五年影响因子：3.0 ）

ISSN： 1642-3593

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Understanding plant water consumption is crucial for artificial afforestation under drought en-vironments and water stress in desert regions. However, the water consumption characteristics of desert species responding to the irrigation regimes are often neglected. By conducting a field test in the Taklimakan Desert Highway shelterbelt, this study examines the sap flow traits of two typical woody halophyte species (Calligonum mongolicum and Haloxylon ammodendron) and how they react to weather conditions and watering practices. Under the same irrigation treatment, the stem flux of C. mongolicum on sunny days was 1.5-5.3 times that on dusty days, while the stem flux of H. ammodendron on sunny days was 3.5-5.5 times that on dusty days. Both species demonstrated some sap flow during the night, representing 14.3%-24.9% and 7.3%-10.4% of the total sap flow for C. mongolicum and H. ammodendron, respectively. H. ammodendron maintained a higher stem flow during daytime and was more drought resistant than C. mongolicum. The daily sap flow patterns of these two species varied, showing both 'single' and 'double peak' curves depending on the watering conditions. A delay was also observed between the sap flow of these two species and the environmental factors. The factors influencing plant sap flow were found to be in the order of solar radiation, temperature, relative humidity, and saturated water vapor pressure difference. A BP-neural network proved highly effective for accurately simulating the sap flow of these two species. This research provides insights into how two common desert tree species adapt their water use in response to drought conditions, which is vital for artificial forest creation in desert areas.