Partitioning evapotranspiration using water stable isotopes and information from lysimeter experiments

Stable isotope techniques can be used to investigate evapotranspiration and its partitioning into evaporation transpiration. However, verification is often difficult due missing information about actual evapotranspiration. Therefore, in this study a methodology tested for laboratory conditions was modified field applications. Evapotranspiration, which determined by weighing lysimeters, were combined with soil water lysimeter measurements calculate transpiration rates of soybean under natural conditions. The case conducted 2019 Groß-Enzersdorf, Austria. results show that the suited measure variations ratios, even during dry periods. Weekly (0.5–2.2 mm d−1) (1.3–4.3 as well respective ratios (transpiration 43–85%) agreed numerical modelling values from literature, confirming applicability portioning field.