Hydrogel and irrigation frequencies in survival, growth and gas exchanges in <i>Eucalyptus urograndis</i>

The objective of this study was to evaluate the effect hydrogel on planting clonal Eucalyptus urograndis seedlings in pots, related different water management, provide information about use efficiency. experiment carried out a forest nursery factorial scheme, as factor "A" referred absence and presence "B" management (0 - irrigation only at planting, 1 daily, 4 every days, 8 days). Evaluations stress symptomatology, morphological characteristics, chlorophyll content, soil gas exchange, increase diameter height, dry biomass were performed. provided an content delay symptoms stress, increasing survival rate. Water limiting for stomatal opening, contributing decrease carbon assimilation by photosynthesis.