Influência do espaçamento de plantio na produção energética de clones de corymbia e eucalyptus

Abstract

Evaluation Corymbia and Eucalyptus clones under different spacings order to produce bioenergy.This study aimed to evaluate the initial growth, the basic density, the production of biomass and chemically analyzing of the wood and bark of twoEucalyptusclones (a hybrid of Eucalyptus urophyllaS.T. Blake, a hybrid tri-cross Eucalyptus urophyllaS.T. Blake x (E. camaldulensisDehn x E. grandisHill ex Maiden))and a hybridCorymbia citriodora(Hook) K. D. Hill & L. A. Johnsonx C. torelliana(F. Muell) K. D. Hill & L. A. Johnsondistributed in three planting spacings: 3x3m, 3x1,5m, 3x1m, at the age of 12 months. The study was conducted in an experiment located in the county Itamarandiba, MG, in a completely randomized design with four replications, in a factorial 3x3, considering how levels of the factors the different clones and planting spacings. It was observed for the three clones that the 3x3m spacing provided plants with greater growth in diameter at breast height (DAP) in relation to the other spacings. The different planting spacings did not induce the variation of the basic specific mass of the wood and the bark in the studied clones. The increase in planting density had a direct relation with biomass production per unit area. There was a decrease in lignin contents in the woodfor twoclonesof Eucalyptus, the larger spacing for the denser spacings.