干旱区研究2017，Vol.34Issue(2)：350-355,6.DOI:10.13866/j.azr.2017.02.15
2014年浑善达克沙地黄柳生长季水分来源同位素示踪研究
Water Sources in Growing Season of Salix gordejevii in the Otindag Sandy Land Traced by Stable D Isotope in 2014
摘要
Abstract
Salix gordejevii is a widely-distributed perennial shrub species over the dunes in east Inner Mongolia and west Liaoning Province,China,and it is an excellent sand-fixing shrub species.However,there were very few studies about water sources closely related to the growth of S.gordejevii in both China and foreign countries.In this study,the hydrogen isotope tracer method was used to measure the growth of S.gordejevii in the growing season of 2014,branch stem water potential,water (precipitation,groundwater and soil moisture) regime and values of hydrogen stable isotope ratio (δD) in the Otindag Sandy Land,and the multi-source linear mixed model Iso Source model was used to calculate the proportions of potential water sources for the growth of S.gordejevii.The results showed that over 80％ water used by S.gordejevii was soil moisture and groundwater in depth of 120-160 cm in May.S.gordejevii absorbed mainly soil moisture of 0-40 cm in depth in June and mainly that of 120-160 cm in depth in July.In August,groundwater was the main water source,and its utilization rate was as high as 82％.These revealed that the potential water sources for the growth of S.gordejevii were different in different seasons,and also suggested that such desert shrub could adapt the optimal water sources through their own adaptive capability to achieve the maximum water use.关键词
黄柳(Salix gordejevii)/稳定氢同位素/IsoSource模型/水分来源Key words
Salix gordejevii/hydrogen stable isotope/IsoSource model/water source引用本文复制引用
菅晶,贾德彬,郭少峰,钱龙娇..2014年浑善达克沙地黄柳生长季水分来源同位素示踪研究[J].干旱区研究,2017,34(2):350-355,6.基金项目
国家自然科学基金项目(51269013) （51269013）
内蒙古自治区自然科学基金项目(2012MS0320) （2012MS0320）
