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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/74253
Title: 
Delimitação entre os lenhos juvenil e adulto de pinus elliottii engelm
Other Titles: 
Delimitation the juvenile and mature wood of Pinus elliottii Engelm
Author(s): 
Institution: 
  • Universidade Federal Rural do Rio de Janeiro (UFRRJ)
  • Universidade Estadual Paulista (UNESP)
ISSN: 
  • 0100-6762
  • 1806-9088
Abstract: 
Trees produce different types of woody tissue during growth. The xylem produced in the first years until a certain cambial age is called juvenile wood and has different physical, mechanical, chemical and anatomical characteristics from that produced later, when the cambial cells have matured. Thus, prior knowledge of the quality of the wood is of fundamental importance for choosing the best use of the material. This work aimed at using data from length of the tracheid and wood density to define the age transition from juvenile to mature wood. For this, three Pinus elliottii var. elliottii trees, aged 35 years, were collected at the Itapetininga Experimental Station, located in the state of São Paulo, Brazil. From each tree, disks of about 5 cm thick were obtained 0.05 m above the ground and used to determine the radial density by the gamma ray attenuation method and to measure the length of the tracheids. The results obtained by linear regression analysis showed that juvenile wood is limited to the first seven years of tree growth and the formation of mature wood occurs after twenty years. For the mature wood, there are significant differences among the averages obtained from the tracheid length and wood density.
Issue Date: 
1-Jan-2013
Citation: 
Revista Arvore, v. 37, n. 1, p. 191-200, 2013.
Time Duration: 
191-200
Keywords: 
  • Age transition
  • Wood density
  • Wood quality
Source: 
http://dx.doi.org/10.1590/S0100-67622013000100020
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/74253
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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