CARACTERIZAÇÃO FISIOLÓGICA DE DIFERENTES CLONES DE EUCALIPTO EM SISTEMA DE INTEGRAÇÃO LAVOURA-PECUÁRIA-FLORESTA

Abstract

Eucalyptus spp. has been widely used in Brazil, about 7,411,276 hectares of the national soil are occupied by the crop. Currently, its selection is made by quantitative characteristics and the understanding of the physiological characteristics is important for this selection. The objective of this work was to evaluate the physiological behavior of the different clones used in the Crop-Livestock-Forest integration system located at the Instituto de Ciências, Tecnologia e Educação campus Morrinhos in the state of Goiás, during the drought period. For this, physiological and quantitative data were analyzed, being them the leaf water potential, photosynthetic rate, total soluble sugars, plant height and lap diameter. The clones were planted following the randomized block design (RBD) and for these evaluations, 40 clones and three replicates were used. The data showed that most clones can remain physiologically active and that physiological responses varied among plant materials. The GG1980 clone had higher growth in height and higher water potential, indicating that the water potential had a greater influence on the growth than the photosynthetic rate.