Caracterización anatómica del leño y evolución del crecimiento en ejemplares de Acacia aroma y Acacia furcatispina en la Región Chaqueña, Argentina

Abstract

The wood of Acacia aroma and Acacia furcatispina is employed for uses of little value such us posts, tools and firewood. The objectives of this work were to study anatomical characters of wood and to analyze the growth of isolated individuals with the purpose of determining their potential for uses of greater value. We determined that these species have high density and heavy wood, with diffuse porosity and tendency to semicircular. The wood of Acacia furcatispina has greater percentage of ligneous elements, better aesthetics qualities and health state than A. aroma. The most frequent defects in these species are rots within heartwood due to fungi attack, and discolorated wood formation, both related to fire scars. The mean width of the growth rings was 2.1 mm (DE = 0.47 mm) in A. aroma and 1.9 mm (DE = 0.74 mm) in A. furcatispina. In A. aroma, the curve of mean annual increment (IMA) intercepted the curve of current annual increment (ICA) for diameter at an age of 24 years, while in A. furcatispina it happened at 10 years. The results show that A. furcatispina is an interesting species to manage in plantations due to its wood qualities, although it would only allow small sized timber. This wood could be allocated for others uses such us parquets and artistic sculpture. Acacia aroma is a species suitable to manage for firewood production due to its capacity to produce greater diameter boles and branches, and to frequent wood decay that reduces its use for others more valuables uses.

Biomass Feedstock Availability for the Supply of Bioenergy in the Lerma Valley (Salta, Argentina): an Evaluation for Territorial Energy Planning

“…The FVI states that the two species with best fuel qualities are: A. aroma (FVI=1,748) and A. caven (FVI=1,609),placing A. praecox (FVI=1,274) last. This concurs with Vita et al (1998) and Parra Valdés (2001) which mention the excellent wood and charcoal quality of A. caven, as well as of A. aroma (Bravo et al, 2006;Pometti et al, 2009). Considering the average of AGB and LHV, they are close to 213,000 GJ.yr -1 .…”

“…In order to compare the fuel characteristics of the four species, the Fuelwood Value Index (FVI) was estimated (see Table 1), following to Purohit and Nautiyal (1987). The basic density values of the species were determined from available literature (Vita et al, 1998;Bravo et al, 2006;INTI-CITEMA, 2007). Ash content and the LHV estimated in the laboratory were expressed in wet base (20% humidity).…”

Xilotecnia of the wood of Acacia schaffneri from the State of Hidalgo, Mexico

“…By comparing the proportion of constituent elements reported by Bravo et al 2006, in Acacia aroma, which has 10,4% vessels 36,2% fibers 32,2% axial parenchyma and 21,2% ray parenchyma, and in Acacia furcatispina, which has 21,8% vessels 42,0% fibers 28,4% axial parenchyma and 7,8% ray parenchyma, it can be seen that the values obtained in this study are between those of the two species. …”

Evidencias de estructura poblacional y estructura genética espacial a escala fina en poblaciones argentinas de Acacia furcatispina (Fabaceae)

“…Las especies de Acacia, en general, tienen la capacidad de fijar nitrógeno atmosférico, proveen madera para combustibles, extractos medicinales, taninos, gomas, madera de obra, fibras, sombra y alimento para animales silvestres y domésticos (Pometti et al, 2012). Algunos trabajos recomiendan, entre otras especies del género, a A. furcatispina para la forestación; además, su madera presenta características consideradas deseables para el aprovechamiento forestal (Bravo et al, 2006). Su regeneración natural es por semilla y su agente de dispersión más importante es el ganado doméstico.…”