MODELING OF BASIC DENSITY OF WOOD FROM EUCALYPTUS GRANDIS AND EUCALYPTUS UROPHYLLA USING NONDESTRUCTIVE METHODS

The objective of this study was to evaluate the accuracy of nondestructive variables in inferring basic density of wood from Eucalyptus grandis and Eucalyptus urophylla. A total of 27 clones of Eucalyptus urophylla and 22 clones of Eucalyptus grandis were used, sourced from a clonal trial set up in Martinho Campos, Minas Gerais. After evaluation using nondestructive techniques of resistography and pin penetration at a constant pressure (Pilodyn®), individuals were felled and disks were removed from the 2%, 10%, 30%, 50% and 70% portions of the merchantable height section, and also from the portion 1.30 m above ground level. Basic density was determined by the water immersion method. Values of basic density ranged from 0.412 to 0.609 g.cm-3 for clones at age 42 months and from 0.408 to 0.664 g.cm-3 for clones at age 54 months. The clones of Eucalyptus urophylla provided higher values of average basic density in relation to Eucalyptus grandis. The variable 'amplitude' had better correlation with basic density in comparison with pin penetration at a constant pressure. Nondestructive evaluation can be used in mass preselection of genetic materials, prior to subjecting them to a more accurate, reliable evaluation.

[1]  J. Brito,et al.  Producao e caracterizacao do carvao vegetal de especies e variedades de bambu , 1987 .

[2]  Kazuo Hayashi,et al.  Relationships of anatomical characteristics versus shrinkage and collapse properties in plantation-grown eucalypt wood from China , 2006, Journal of Wood Science.

[3]  Robert Evans,et al.  Sampling Plantation Eucalypts for Wood and Fibre Properties , 1997 .

[4]  Christian Wirth,et al.  Using drill resistance to quantify the density in coarse woody debris of Norway spruce , 2009, European Journal of Forest Research.

[5]  J. L. Colodette,et al.  Caracterização tecnológica, para produção de celulose, da nova geração de clones de Eucalyptus do Brasil , 2005 .

[6]  Edgar Vladimiro,et al.  Avaliação Não Destrutiva de Propriedades Mecânicas de Madeiras Através de Ultra - Som - Fundamentos Físicos e Resultados Experimentais , 2003 .

[7]  F. Seixas,et al.  Análise da Produção Energética e de Carvão Vegetal de Espécies de Eucalipto , 1983 .

[8]  J. Pereira,et al.  Variação da densidade básica da madeira de doze espécies de Eucalyptus plantadas em Uberaba, MG. , 1987 .

[9]  Zhaohua Lu,et al.  Use of the pilodyn for assessing wood properties in standing trees of Eucalyptus clones , 2010, Journal of Forestry Research.

[10]  J. L. Colodette,et al.  Influência da densidade básica da madeira na qualidade da polpa kraft de clones hibrídos de Eucalyptus grandis W. Hill ex Maiden X Eucalyptus urophylla S. T. Blake , 2004 .

[11]  K. Yamashita,et al.  Tangential and radial shrinkage variation within trees in sugi (Cryptomeria japonica) cultivars , 2009, Journal of Wood Science.

[12]  Antônio Donizette de Oliveira,et al.  O uso de modelos matemáticos na estimativa da densidade básica da madeira em plantios de clones de Eucalyptus sp. , 2006 .

[13]  P. Khristova,et al.  Carbonization of some fast-growing species in Sudan , 1993 .

[14]  L. Mendes,et al.  RESÍDUOS DE SERRARIAS NA PRODUÇÃO DE PAINÉIS DE MADEIRA AGLOMERADA DE EUCALIPTO , 2000 .

[15]  L. Mendes,et al.  Eucalyptu's wood residues derived from sawmills for particleboard manufacturing. , 2000 .

[16]  S. Pallardy,et al.  Biomass production by two-year-old poplar clones on floodplain sites in the Lower Midwest, USA , 2003, Agroforestry Systems.

[17]  C. Ceraldi,et al.  Resistographic inspection of ancient timber structures for the evaluation of mechanical characteristics , 2001 .

[18]  Clovis Roberto Haselein,et al.  Resistência mecânica e à umidade de painéis aglomerados com partículas de madeira de diferentes dimensões. , 2005 .

[19]  W. Mabee,et al.  Industrial Sustainability of Competing Wood Energy Options in Canada , 2010, Applied biochemistry and biotechnology.

[20]  Paulo Fernando Trugilho,et al.  Avaliação de clones de Eucalyptus em diferentes locais visando à produção de carvão vegetal , 2011 .

[21]  M. Ibrahim,et al.  Growth, production and carbon sequestration of silvopastoral systems with native timber species in the dry lowlands of Costa Rica , 2008, Plant and Soil.

[22]  F. Schweingruber,et al.  RESISTOGRAPH and X-Ray Density Charts of Wood. Comparative Evaluation of Drill Resistance Profiles and X-ray Density Charts of Different Wood Species , 1996 .

[23]  Aylson Costa Oliveira,et al.  Relationship among wood characteristics and Eucalyptus cellulose pulp with the non destructive methods in the living tree. , 2011 .

[24]  Paulo Fernando Trugilho,et al.  Determinação da densidade básica da madeiras de Eucalyptus por diferentes métodos não destrutivos , 2011 .