[Hydrogen and oxygen stable isotope characteristics of water in SPAC system of evergreen broadleaved forest in subtropical region]

Forest soil-plant-atmosphere continuum (SPAC) is an important continuous process of water cycle. In this study, we analyzed hydrogen and oxygen stable isotope compositions of the precipitation, atmospheric water vapor, soil water, branch water, and leaf water to explain the characteristics of the continuous process and the associated controlling factors in a subtropical evergreen broadleaved forest. The results showed that the regression equations between hydrogen and oxygen stable isotopes were森林的土壤-植物-大气连续体(SPAC)是陆地重要的水循环连续界面过程。本研究通过分析亚热带常绿阔叶林的降水、大气水汽、土壤水、叶片水的同位素组成,探讨森林SPAC系统水分的氢氧同位素组成特征以及植物蒸腾与叶片性状和环境因子的关系。结果表明: 研究区大气降水、土壤水、竹柏枝条水、竹柏叶片水和大气水汽的δD-δ