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Maderas. Ciencia y tecnología

On-line version ISSN 0718-221X

Abstract

VALENZUELA, Juan; ULLOA, Iván  and  RALLO, Mónica. ESTUDIO DEL ANGULO FIBRILAR Y SU RELACION CON LA EDAD CAMBIAL EN Pinus radiata D.DON, PROVENIENTE DE LA SEPTIMA REGION, CHILE. Maderas, Cienc. tecnol. [online]. 2003, vol.5, n.2, pp.117-124. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2003000200003.

The general objective of this study was to measure the fibrilar angle and to establish its relationship with the age, in trees of Pinus radiata (D.DON). Five trees were chosen randomly and were extracted discs to the breast hight (1,3 m), specifically samples of the rings of growth 1, 5, 10, 15 and 17 (last ring from the pith). To this rings of growth, they were applied the method of Senft and Bendtsen (1985) to measure the fibrilar angle. The value of the fibrilar angle average for the five trees was of 18º, with a maximum value 43º and a minimum of 2º. As long as, the average value for the rings collected was of 38º for the ring 1, 22º for the 5, 16º for the 10, 11º for the 15 and 4º for the 17. The relationship between the age and the fibrilar angle, settled down by means of the adjustment of different models of lineal multiple regressions (lineal, quadratic and cubic), where the cubic pattern presented the best adjustment characteristcs (R2= 0,99). Both variation sources (age and tree) they were studied statistically to check if there was interaction among them, being determined that each variable acts in independent form on the fibrilar angle

Keywords : Fibrilar angle; cambial age; Pinus radiata.

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