Durability of Eucalypts wood in soil bed and field decay tests

Pedro Nicó De Medeiros Neto,Libânia Da Silva Ribeiro,Juarez Benigno Paes,José Tarcísio Da Silva Oliveira,João Gabriel Missia Da Silva,José Clailson Franco Coelho

doi:10.4067/s0718-221x2020005000403

Pedro Nicó De Medeiros Neto, Libânia Da Silva Ribeiro + Show 4 more

Open Access

https://doi.org/10.4067/s0718-221x2020005000403

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Abstract

This evaluated the natural resistance of wood from seven Eucalyptus trees in field decay and soil bed tests. Two 12-year-old trees were randomly sampled per species, with 2,2 m logs being obtained from the basal section of each tree. The samples were taken in two positions in the radial direction of the stem (middle heartwood and transition zone; containing heartwood and sapwood). The field decay tests were installed in three municipalities in the southern state of Espirito Santo, and the soil utilized soil from the three field decay test areas. The field decay tests were evaluated after six, 12 and 18 months after installation and the soil bed tests after six months. The Scott-Knott test (p ≤ 0,05) was used in the analysis and evaluation of the tests. The sapwood-heartwood (transition region) exhibited the greatest mass losses for the field decay and soil bed tests. On average, for the soil bed test the lowest mass losses were observed for the soil of Vargem Alta (5,00 %), with greater mass losses observed for Sao Jose do Calcado (7,05 %) and Jeronimo Monteiro (9,90 %). In the field decay test the organisms present in the soil of Sao Jose do Calcado and related to the organic matter content Eucalyptus grandis and Eucalyptus saligna more intensely

Highlights

Woody resources have been used to produce energy, pulp and paper, and construction material for urban and rural environments, the furniture industry and medicinal products
The soil bed test filled with soil from the municipality of Jerônimo Monteiro did not show a significant interaction for the mass loss between the positions and the eucalypts wood evaluated
Citriodora and the greatest mass losses were observed for the Jerônimo Monteiro soil, except for E. saligna (Figure 3)

Summary

Introduction

Woody resources have been used to produce energy, pulp and paper, and construction material for urban and rural environments, the furniture industry and medicinal products. Wood stands out because of its importance as a renewable and more accessible product than sources of raw materials such as fossil fuels and other building materials. As it is a material of organic origin, it is subject deterioration. Few studies are related to the natural durability of eucalypts wood in Brazil (Silva et al 2004, Morais and Costa 2007, Paes et al 2015). According to the Brazilian Tree Industry (IBÁ 2019), the Eucalyptus plantations in Brazil correspond to 5,7 million hectares, necessitating research for its best use

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