Evaluacion de la durabilidad natural de madera aserrada de la especie Pinus radiata de la empresa AGLOMERADOS COTOPAXI en reaccion a un hongo xilófago.

Abstract

This research aimed to evaluate the natural durability of sawn wood of the Pinus radiata species from Aglomerados Cotopaxi in reaction to a xylophagous fungus. The study was experimental based on a completely random design of a single factor with four treatments and five repetitions. The factor under study consisted of the fungus dosage, where 100, 50, and 10 µl of the fungus were studied. Xylophage reproduced on a potato-dextrose agar medium, together with a control treatment of 10 µl of distilled water. These factors were each subjected to five cubes of 2 cm3 of sawn wood of P. radiata from Aglomerados Cotopaxi, which were disinfected and then left for six weeks in the jars with the dosages of the fungus on the culture medium. After the xylophagous action of the fungus on the wood, the weight loss of the cubes was determined. This loss percentage was compared with classification tables of the resistance of the wood to rot to determine the natural resistance of the forest species in the study, the density of the wood was also determined to relate it to the natural resistance. The fungus turned out to be of the Aspergillus niger species. The analysis showed that there were statistically significant differences between the treatments, but there were no differences in the different concentrations that the xylophagous fungus was applied, having an average of 2.05 %, Pinus radiata has a resistance class A, defining it as highly resistant to A. niger with a lifespan of 15 to 25 years. The higher the density of the wood, the more excellent the resistance to Aspergillus niger was determined. Similar studies with other xylophagous fungi in the country are recommended.