Effect of microbes and atmospheric parameters on wood products utilization in Uyo, Akwa Ibom state, Nigeria

Abstract

This study evaluated microbial deteriorating agents and atmospheric parameters that influence strength of woods commonly sold in Uyo timber markets and their impact on the wood utilization .Using the pour plate technique, analytical procedures and the Young Modulus formula, microbial biodeterioration agents, atmospheric parameters and tensile strength of woods exposed to in-door and out-door atmospheric conditions in Uyo, Akwa Ibom State were investigated respectively.Result revealed that microorganisms were commonly deposited on Triplochiton sclerozylon (Obeche), Gmelina arborea Linn (Gmelina)and Milicia excelsa(Iroko) wood samples exposed in suspended atmospheric conditions. The densities of the microbial biodeterioration agents colonizing the woods, varied with wood type and exposure conditions. Wood samples exposed in indoor atmospheric condition had higher densities of fungal deteriogens and those exposed outdoor were colonized more by bacteria. Statistical analysis at 95 % confidence limit revealed weak or insignificant relations (P > 0.5) between atmospheric determinants and microbial loads. This implies that the Atmospheric temperature and relative Humidity (RH) had little or no influence on the microbial activities of woods in suspended atmospheric conditions. The temperature range for indoor exposure was between 30.4 -35.0, relative humidity ranged from 70.0- 80.0 while in the outdoor exposure the temperature fluctuated between 31.8- 40.3 and relative humidity of 50.0-79.0. Even though the environmental conditions fluctuated and did not favour the growth of biodegradation organisms; the atmospheric conditions might change anytime to favour the wood biodegrading organisms. It is therefore recommended that proper treatment with wood preservatives should be employed to enhance the usage life and quality of woods used in suspended platforms.

Keywords: Atmospheric, deterioration, environment, wood