森林工程2025，Vol.41Issue(6)：1156-1163,8.DOI:10.7525/j.issn.1006-8023.2025.06.006
基于氢氧稳定同位素技术的东北红豆杉水分来源
Water Sources of Taxus cuspidata Based on Stable Hydrogen and Oxygen Isotopes Technique
摘要
Abstract
The water adaptation strategy of extremely small population Taxus cuspidata is the basis of its response to cli-mate change,and studies based on isotopes are still blank.By measuring the δD and δ18O values of plant xylowater and soil water,direct correlation method and multiple linear mixing model(Iso-Source)were used to analyze the water sources and water use strategies of Taxus cuspidata.The results showed that:the fluctuation range of soil water content in 0-40 cm soil layer of Taxus cuspidata was 32.69%to 54.29%,and the trend was first increased and then decreased;the fluctuation range of soil water content in 40-100 cm soil layer was 22.55%to 25.73%,and the fluctuation range was small.The soil water content in the 0-40 cm soil layer was higher than that in the 40-100 cm soil layer.The δD and δ18O values of soil water from 0 to 100 cm of Taxus cuspidata were-84.26‰ to-52.17‰ and-11.69‰ to-7.49‰,re-spectively,and decreased gradually with the increase of soil depth.The δD and δ18O values of soil water changed sharply in 0-40 cm soil layer,but changed little in 40-100 cm soil layer.The main water source of Taxus cuspidata was 0-40 cm soil water,and the utilization rate was 89.55%,and the utilization rate of 40-70 cm and 70-100 cm soil water was 5.15%and 5.30%,respectively.This study reflects the water adaptation of Taxus cuspidata under the background of global warming,and the results can provide scientific basis for assessing the stability of Taxus cuspidata ecosystem under future climate change.关键词
极小种群/东北红豆杉/氢氧稳定同位素/水分来源/Iso-SourceKey words
Extremely small populations/Taxus cuspidata/stable hydrogen and oxygen isotopes/water source/Iso-Source分类
农业科技引用本文复制引用
韩丽冬,沃晓棠,刁云飞..基于氢氧稳定同位素技术的东北红豆杉水分来源[J].森林工程,2025,41(6):1156-1163,8.基金项目
黑龙江省省属科研院所科研业务费项目(CZKYF2023-1-B028 （）
CZKYF2024-1-B014 （）
SCZ2022-06). （）
