01891naa a2200265 a 450000100080000000500110000800800410001910000200006024502060008026000090028652009950029565000120129065000170130265000290131965000230134865300190137165300210139065300150141170000200142670000200144670000170146670000260148370000260150977300900153520501962024-09-09       2015    bl uuuu     u00u1 u    #d1 aROCHA, M. F. V.  aInterface of different conditions of growth and cutting age in estimating dry mass, mass of carbon and energy per hectare of Eucalyptus grandis X Eucalyptus camaldulensis clones.h[electronic resource]  c2015  aThis study aimed to verify the influence of plant spacing and cutting age to estimate the dry mass of wood without bark, carbon mass and energy per hectare, compared to the average annual increment of a hybrid of Eucalyptus grandis x Eucalyptus camaldulensis. The experiment was installed in December 2002 and were evaluated five different spacings, 3,0 x 0,.5; 3,0 x 1,0; 3,0 x 1,5; 3,0 x 2,0 and 3,0 x 3,0 meters. Measurements were carried out at 4, 5, 6 and 7 years old. For each tree were removed discs at the base, 25, 50, 75 and 100% of the commercial trunk height. The amount of energy per hectare was calculated on the basis of the values of the IMA, basic density, calorific value of wood and the carbon mass. The results show that for the production of charcoal and energy optimal crop age is 5 years spaced by 3,0 x 0,5 meters, which shows that the use of high planting density and short rotation, for this order, based on the properties of the produced timber, was satisfactory.  aEnergia  aEspaçamento  aEucalyptus Camaldulensis  aEucalyptus Grandis  aIdade de corte  aMassa de carbono  aMassa seca1 aCOSTA, E. V. S.1 aJESUS, M. S. de1 aVITAL, B. R.1 aCARNEIRO, A. de C. O.1 aCARVALHO, A. M. M. L.  tAustralian Journal of Basic and Applied Sciencesgv. 9, n. 23, p. 175-178, July 2015.