文献类型：期刊文献

英文题名：Promotion of tree transpiration by soil moisture replenishment along a larch hillslope in the Liupan Mountains, Northwest China

作者：Bai, Yushi[1,2] Yu, Pengtao[1,2] Wan, Yanfang[1,2] Wang, Yanhui[1,2] Liu, Bingbing[1,2] Liu, Zebin[1,2]

第一作者：Bai, Yushi

机构：[1] Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China; [2] Liupan Mountains Forest Ecosystem Positioning Observation and Research Station of Ningxia, Guyuan, 756400, China

年份：2025

卷号：662

外文期刊名：Journal of Hydrology

收录：EI(收录号：20253218961819);Scopus(收录号：2-s2.0-105012722915)

语种：英文

外文关键词：Arid regions - Forestry - Replenishment (water resources) - Soil moisture - Soil surveys - Transpiration

摘要：In arid and semiarid regions, soil moisture can effectively promote tree transpiration. Soil moisture replenishment, as an input underlying soil moisture dynamic, inevitably affects tree transpiration. Although many previous studies have investigated soil moisture effects on tree transpiration, few have addressed soil moisture replenishment effects, especially lateral replenishment at different slope positions along hillslopes. In this study, we tested how soil moisture replenishment and lateral replenishment at different slope positions affect stand transpiration. Meteorological conditions, sap flow, and soil moisture were monitored during the growing season (May to October) from 2021 to 2023 on a larch hillslope in the Liupan Mountains, Northwest China. Our results showed that the stand transpiration differed among slope positions in years with different precipitation pattern. The daily stand transpiration (mm·day?1) was ordered upslope (0.66) > midslope (0.57) > downslope (0.41) in normal years and midslope (0.53) > upslope (0.44) > downslope (0.35) in summer drought years. However, the difference in stand transpiration was reduced among slope positions in relatively wet years. The daily stand transpiration increased with increasing soil moisture replenishment levels, suggesting that soil moisture replenishment effectively promoted stand transpiration, which was the most pronounced at the midslope position. Lateral replenishment played an indispensable role in stand transpiration, especially at the midslope position, with a contribution of 11.3 %. These results suggest that lateral replenishment plays an important role in redistributing soil moisture on hillslopes and has an essential effect on tree transpiration and thus could provide guidance for site selection for vegetation restoration in water-scarce areas. ? 2025 Elsevier B.V.