PHYSICAL PROPERTIES OF Campnosperma panamensis, Zanthoxylum riedelianum, Allophylus nitidulus, SPECIES OF THE DRY FOREST OF THE PROVINCE OF ESMERALDAS

Abstract

The objective of this research is to determine the physical properties of three forest species from the tropical dry forest of the Tachina parish, canton and province of Esmeraldas, for which a bifactor experimental research design was applied, and 5 response variables, the results for the Campnosperma panamensis Standl, was: moisture content 9.50%, parked specific weight of 1.06g/cm3, anhydrous specific weight of 0.83g/cm3, tangential and radial shrinkage 1.84 and 2.31 respectively, total volumetric shrinkage of 3.97, shrinkage coefficient of 2.64, T/R shrinkage ratio is 0.80, for Zanthoxylum riedelianum Engl., it was moisture content 9.15%, stationary specific weight 0.88g/cm3, anhydrous specific weight 0.70g/cm3, tangential and radial shrinkage 2.65 and 2.31, volumetric shrinkage total of 5.46, shrinkage coefficient of 0.87, shrinkage ratio T/R is 0.94; and for Allophylus nitidulus it was moisture content 6.33%, parked specific weight 0.88g/cm3, anhydrous specific weight 0.88g/cm3 tangential and radial shrinkage 2.20 and 2.32, total volumetric shrinkage of 4.41, shrinkage coefficient of 1.20, shrinkage ratio T/R is 0.95. The values ​​obtained in the anhydrous apparent specific weight 0.83g/cm3, 0.70g/cm3, 0.88g/cm3 for the three species studied, places them in the category of heavy species, which determines them as resistant species when put into use. service, also from the data obtained for the anisotropy of the total contraction, gave a result for the T/R ratio of 0.80, 0.94 and 0.95, placing these species as very good and stable woods, excellent for putting into service.