Characterization of uneven plantations of Aniba rosodora Ducke in Sateré Mawé area for productivity purposes.

Abstract

In order to stimulate the bioeconomy in the Amazon, this study aimed to create a scientific technical base for the bioeconomy of plantations in Aniba rosodora Ducke, in the Sateré-Mawé indigenous area, in the State of Amazonas. The dendrometric characterization and quantification of the biomass of the plantations were studied, as well as the determination of the chemical composition and essential oil yield. We selected four productive areas of rosewood: Two plantations with 10 and 12 years old in Barreirinha, two in Maués with 5 and 9 years old and one plantation in Parintins with 21 years old. We carried out a 100% inventory (census) of uneven Rosewood plantations, followed by the collection in triplicate of leaves (sun and shade) and fine branches (sun and shade) for essential oil extraction and chemical analysis, totaling 60 (sixty ) Planting material manager. The essential oil yield was determined from the ratio between the dry mass weight of rosewood branches and leaves and the weight of oil extracted from this mass. The oil composition was provided by gas chromatography and an analysis of the generated chromatograms was made from the observation of linalool contents and minor constituents. The highest values in Total Height, DBH, Biomass and Increment in Biomass were from 21 years of planting, as was to be expected, given the time of growth in relation to younger plantings. However, when we observe the increment in Total Height and the increment in DBH, it is noteworthy that the Barreirinha plantations had a greater Increment in Total Height than the 21- year planting in the analyzed period. While for the increment in DAP, the smallest increment was for the 21-year planting, which can be explained by the death of some individuals, as well as by the stabilization of the vertical and horizontal planting growth. The differentiation in the chemical composition of essential Rosewood essentials occurred according to the municipality, between leaves and branches components. For the treatments, a partial overlap was observed between the sun and shade treatments for leaves and branches. The percentage in area of Linalool was shown to be a heterogeneous characteristic of the essential oil for the oldest plantations, not being observed for newer plantation. The average essential oil yield was higher in leaves (1.61%) than in fine twigs (1.45%) and there was no difference in essential oil yield for the treatments (sun and shade), showing that it is necessary to perform stratification of the tree copy to obtain the greatest adjustment of the essential oil.