Fracionamento isotópico aplicado ao estudo de evapotranspiração.

Abstract

To verify the possibility of apply the variations of isotope, deuterium and oxygen-18 concentrations it soil-plant-atmosphere system this study was carried out. It was shown that it is possible to use the correlations between and values to verify qualitatiwely the plant hydric necessities in relation to their development phases. It was possible to observe the variation that can occur at the evapotranspiration rates during the day too. Further studies concerned with the quantitative analysis of water loss process would be interestings.