Abstract
ABSTRACT Wind damages are common in forest plantations and the use of this wood can minimize losses. The objective was to evaluate the chemical composition and the energetic potential of wood and charcoal from trees subject to wind damage. Eight (A to H) two-years-old Eucalyptus grandis × Eucalyptus urophylla clones were selected in a region where wind damage is frequent. The basic density, calorific value, chemical composition of wood and calorific value, immediate chemistry and gravimetric yield of charcoal were determined for all clones. Materials with high lignin content and low S/G ratio had higher gravimetric yield. The energy density of wood and charcoal showed high relationship with the basic and apparent relative density, respectively. All materials showed potential for bioenergy, but the clone E stood out with higher gravimetric yield and energy density.
Highlights
The winds are characterized by the air movement from areas with high to low pressures (Moore et al, 2013; Kramer et al, 2014; Hale et al, 2015)
The basic density, calorific value, chemical composition of wood and calorific value, immediate chemistry and gravimetric yield of charcoal were determined for all clones
One disk from each tree were milled with a Standard Wiley knife mill with a 2 mm screen. This material was sieved with a 40-60 mesh sieve and the retained fraction was used to determine the total extractives according to ASTM D-1105-94 (ASTM, 1994); besides the insoluble lignin (Gomide and Demuner, 1986); soluble lignin (Goldschimid, 1971) and Siringil/Guaiacil (S/G) ratio (Lin and Dence, 1992)
Summary
The winds are characterized by the air movement from areas with high to low pressures (Moore et al, 2013; Kramer et al, 2014; Hale et al, 2015). Wind damage in forests are reported since 1940 (Mitchell et al, 2012) in many regions of the world (Lagergren et al, 2012; Moore et al, 2013; Kramer et al, 2014). It is necessary to harvest broken material and plant a new forest. In both cases, losses are considerable and threaten eucalyptus plantations
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