Delimitação entre os lenhos juvenil e adulto de pinus elliottii engelm
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
01/01/2013
|
Resumo |
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. |
Formato |
191-200 |
Identificador |
http://dx.doi.org/10.1590/S0100-67622013000100020 Revista Arvore, v. 37, n. 1, p. 191-200, 2013. 0100-6762 1806-9088 http://hdl.handle.net/11449/74253 10.1590/S0100-67622013000100020 S0100-67622013000100020 WOS:000316962400020 2-s2.0-84875867942 2-s2.0-84875867942.pdf |
Idioma(s) |
eng por |
Relação |
Revista Árvore |
Direitos |
openAccess |
Palavras-Chave | #Age transition #Wood density #Wood quality |
Tipo |
info:eu-repo/semantics/article |