氢氧稳定同位素在SPAC水分循环中的应用研究进展

Advances of Stable Hydrogen and Oxygen Isotope Applied in SPAC Water Cycle

氢氧稳定同位素是广泛存在于自然界水体中的环境同位素,其在不同水体中组成特征的差异可以指示水分循环过程及植物用水机制等,从而成为广泛应用于水分循环研究中的重要手段。本文介绍了稳定同位素技术在土壤植物大气连续体(SPAC)水分循环中的应用原理及研究进展,并阐述了其在SPAC水分循环应用中存在的问题及发展前景,以期为氢氧稳定同位素技术在SPAC水分循环研究中的深入应用提供参考,为研究水资源、水环境问题,特别是干旱、半干旱地区的水分利用效率、水分分配机制等关键性问题提供理论依据和技术支持。

The stable hydrogen and oxygen isotopes are kind of environmental isotopes, which widely exist in various kinds of water. Because their relative abundance variation in water can indicate the water circulation and mechanism of water use in plant, isotopic techniques become an increasingly important means to study water cycle. In this paper, the principle of application and the research advances of stable hydrogen and oxygen isotope technique that used in Soil-Plant-Atmosphere Continuum （SPAC） water circulation are reviewed. Meanwhile, the disadvantages and the perspective on its development are put forward in order to provide reference to further application of the stable hydrogen and oxygen isotope technique in SPAC water circulation, and to offer theory bases and technique support to study practical problems of water resource and water environment, especially some crucial ones in arid areas.