Abstract
ABSTRACT This study aimed to estimate the biomass and energy of a clonal planting short rotation experiment with hybrids of Eucalyptus urophylla ST Blake x Eucalyptus grandis (Hill) Maiden, deployed in 3 m x 3 m spacing, at the Academic Unit Specialized in Agricultural Sciences, Macaíba/RN. The analysis were performed at the Laboratory Panels and Wood Energy, Federal University of Viçosa, in which the following ratings on wood three cultivars (GG100 ; AEC0144 and AEC0224) were performed: determination of basic density, high calorific power, chemical analysis, thermogravimetric analysis and subsequent calculations for estimating the mass production and energy were performed. The base (10 cm from the ground), the third and two thirds of commercial tree height: composed for analysis, taken from three points along the stem samples were used. The design of the experiment was a completely randomized. Data were subjected to analysis of variance and the means were compared by Tukey test (a= 0.05). The clone who excelled in the first year of planting was the GG100 with 11,805 kW.h.ha-1 of energy productivity, followed by clone AEC0224 (6,755 kW.h.ha-1) and AEC0144 (4,405 kW.h.ha-1). The performance of this clone was due to mainly the higher volumetric growth. The wood quality among clones showed little difference. It should stimulate the deployments of species of short rotation in the state of RN to supply the elevated energy demand of forest biomass in the region.
Highlights
The search for fast-growing and high-yielding forests has increased due to the need for technological development on a more sustainable basis, as well as a reduction in the use of fossil fuels
It is observed that for the basic density was no significant difference between the different genetic materials and GG100 clone had the highest basic density value of wood (371 kg m-3) and higher above the AEC0144 clones (339 kg m-3) and AEC0224 (343 kg.m-3)
It was observed that for insoluble lignin and extractive content there was a significant difference between the clones, whereas for soluble lignin, total lignin and holocelluloses there was no significant difference between the genetic materials
Summary
The search for fast-growing and high-yielding forests has increased due to the need for technological development on a more sustainable basis, as well as a reduction in the use of fossil fuels. When the goal is energy production, Eucalyptus is one of the most used forest biomass This is due to the wide ecological distribution and the large number of species of this genus that facilitates its introduction in regions with different edaphoclimatic conditions. It has renewable energy potential and is an alternative that can help to decrease the use of fossil fuels (Paludo et al, 2013)
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