CINCO CARACTERÍSTICAS TECNOLÓGICAS DE LA MADERA DE Pinus caribaea var. hondurensis Barr et Golf.
Keywords:
Quality indexes of paper pulp, lineal shrinkage, basic density, tracheids dimentions, Pinus caribaea var. Hondurensis, latewood percentageAbstract
The present technological study was carried out with 88 trees of Pinus caribaea var. hondurensis from a forest plantation loc·ated in "La Sabana", Oaxaca. The objectives were to determine the basic density and the lineal shrinkage of the wood, to estimate latewood per cent in growth rings and to calculate the quality indexes for paper rJulp. These characteristics were determined by growth rings in three different stAm heights (0.30, 1.30 and 3. 70 m). The proportion of latewood, basic density and radial and tangential shrinkage increase as the distance from the pith does, however at higher heights in the stem, the density and radial shrinkage tend to diminish, and the anisotropic relationship of shrinkage was low. Length, cell walls width and total diameter of the traqueids increase with the distance from the pith to the bark at the three stem heights. The tracheids are longer in any particular ring from the pith at the highest part of the stem and reduce their lenght towards the base of the tree. In contrast, the diameter of the lumen has an inverse relationship in regard to the distance from the pith. The pulp wood of this species is considered good for paper production.
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