Cronossequência de deterioração na anatomia de madeiras tropicais estocadas em área de mineração.

Abstract

The storage and permanence of wood in open storage yards leave them subject to the process of natural weathering; causing difficulties of identification of the species by the modifications in the organoleptic properties and anatomical structural degeneration of the wood in relation to the time of storage generating greater susceptibility to the accelerated deterioration of the same ones. The objective of this work is to evaluate qualitatively and quantitatively the effect of natural weathering on the anatomical structural degradation of two tropical species, considering the storage time and position of the logs in the wood stacks as a function of the following variables: (i) ) Anatomical structure of the secondary xylem, (iii) Basic density and (iv) Total extractive content. The allocation of the wood of M. elata and T. glauca in storage yards under the effect of the natural weathering process adversely affected the anatomical structure of the species, presenting structural fragilization, variations in the dimensions of the elements and consequently physical and chemical losses that compromise the properties and quality of these woods. The signs of degradation were evident with the temporal increase of storage and proximity to the soil, with the most deteriorated logs from the years of 2009 and 2013 being closer to the soil for both species.