Transpiração, crescimento e desenvolvimento de duas espécies de eucalipto submetidas ao déficit hídrico.

Abstract

The objective of this study was to quantify the influence of water deficit on transpiration, and on growth (height and diameter) and developmental (main stem leaf number) parameters of Eucalyptus grandis (Hill ex Maiden) and Eucalyptus saligna (Smith). To achieve this objective, an experiment was carried out inside a glasshouse at the Crop Production Department of UFSM from 01/10/2005 to 09/12/2005. Soil water was represented as the fraction of transpirable soil water (FATS). Results showed that the beginning of decrease in transpiration which is an indication os stomatal closure, takes place when FATS is about 0,55 for both species, which is greater than for many annual crops and similar to pea.