Ecophysiological and growth aspects of Eucalyptus urograndis submitted to water supplementation in clonal plantations
DOI:
https://doi.org/10.5216/rbn.v1i1.28306Keywords:
Forest ecophysiology, plant growth, water deficitAbstract
The aim of this study was to evaluate physiological and dendrometric characteristics in a clone of Eucalyptus grandis W. Hill ex Maiden X E. urophylla S. T. Blake under water supplementation in fieldconditions, from the onset of the dry season to the rainy season. The experiment was carried out in a randomized block design with four replications and four treatments. Each plots consisted of 56 plants and service area of 18 plants. The treatments consisted of four weekly applications of four water levels (0, 9, 18 and 30 mm of water per plant) from the beginning of the dry season, stopping at the beginning of the rainy season. The characteristics evaluated were: net photosynthesis, stomatal conductance, transpiration, diameter at breast height, diameter at the base of the neck and height. In the dry season, the highest values for physiological variables were observed in the group of plants that received thehighest water level. However, all physiological variables showed significantly superior performance in the rainy season. The dendrometric variables suffered slight influence depending on the water levels,however, they were equal to all treatments at the end of the experiment. Thus, for the studied clone, the water management adopted was not effective in promoting greater plant growth.
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