Quality of wood and pulp from a clone of Eucalyptus grandis planted at three locations

Cláudio Angeli Sansígolo,Éder Da Silva Ramos

doi:10.1590/s0104-77602011000100006

Cláudio Angeli Sansígolo, Éder Da Silva Ramos

Open Access

https://doi.org/10.1590/s0104-77602011000100006

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Journal: Cerne	Publication Date: Mar 1, 2011
Citations: 15	License type: cc-by

Affiliation: Universidade Estadual Paulista (Unesp)

Abstract

Eucalyptus grandis is one of the most popular species to use as raw material for pulp production in Brazil, as it provides excellent pulping, bleaching and papermaking results. The main objective of this study is to examine the quality of wood and pulp from a clone of Eucalyptus grandis, at age 4 years approximately, planted in three different soils, two of which being low fertility and one being a superior fertility soil, and their reflections on wood quality and pulping results. Chemical analyses of the soils followed guidelines developed by Raij et al. (2001), while physical and chemical properties of the wood followed ABTCP, TAPPI and ABNT standards. Chemical analyses of the soils pointed to lower fertility in Fazenda Limeira and Fazenda Tapera Queimada as opposed to higher fertility in Fazenda Mendes União. Results revealed stronger tendencies for the stand grown in the less fertile soils (Fazenda Limeira and Fazenda Tapera Queimada) in comparison to the stand grown in more fertile soil (Fazenda Mendes União) as to: higher wood and bark basic density, lower height and dry matter content, higher bark content, lower extractives content and higher holocellulose content, higher total and screened yields from pulping, lower specific wood consumption/t of pulp, and higher tear and tensile indices at low refining levels.

Highlights

In Brazil, Eucalyptus grandis is one of the most popular species to use as raw material for production of cellulose pulp
In Brazil, Eucalyptus grandis Hill ex Maiden is the most commonly cultivated and is proving the best performing species in low fertility soils. It has been showing dissimilar development in low fertility soils, suggesting that studies should be carried out to clarify the cause of such pattern and whether desirable wood characteristics for industrial purposes are somehow being altered as a function of these yield dissimilarities
The main objective of this work is to assess the quality of wood and pulp from a clone of Eucalyptus grandis planted in three different soils, two of which being low fertility and one being a superior fertility soil

Summary

Introduction

In Brazil, Eucalyptus grandis is one of the most popular species to use as raw material for production of cellulose pulp. Contributing factors to choose this species include its excellent silvicultural characteristics for commercial planting and high yield rates. It provides excellent delignification, bleaching and papermaking results. In Brazil, Eucalyptus grandis Hill ex Maiden is the most commonly cultivated and is proving the best performing species in low fertility soils. It has been showing dissimilar development in low fertility soils, suggesting that studies should be carried out to clarify the cause of such pattern and whether desirable wood characteristics for industrial purposes are somehow being altered as a function of these yield dissimilarities. Physical and chemical properties have increasingly been taken into account when assessing wood as raw material for technological purposes, in particular the effects of these properties on the delignification process and on final pulp quality

Objectives

Methods

Conclusion