Density, compression and modulus of elasticity (MOE) of Anogeissus leiocarpus (DC.) Guill. and Perr. Daniellia oliveri (Rolfe) and Gmelina arborea (Roxb) wood species in Makurdi, Nigeria
- 1Department of Forest Production and Products, Federal University of Agriculture Makurdi, PMB, 2373, Makurdi, Benue State, Nigeria
- 2Department of Forest Production and Products, Federal University of Agriculture Makurdi, PMB, 2373, Makurdi, Benue State, Nigeria
- 3Department of Forest Production and Products, Federal University of Agriculture Makurdi, PMB, 2373, Makurdi, Benue State, Nigeria
Res. J. Agriculture & Forestry Sci., Volume 6, Issue (11), Pages 1-5, November,8 (2018)
The longevity of timber in service has been affected by lack of appropriate quality indices prior to end use application. This study determined density, compression parallelto grain (CSLG) and compression perpendicular to grain (CSPG) and the MOE of A. leiocarpus, D. oliveri, and G. arborea. The design was a factorial experimental of 3x3x4 consisting of 3 wood species, 3 wood positions and 4 test parameters in Completely Randomized Design (CRD). Results on variation among wood species revealed density in A. leocarpus, D. oliveri, and G. arborea as (925, 659 and 628)kg/m3 individually. CSLG was (6.72, 5.53 and 4.37)N/mm2 in G. arborea, D. oliveri and A. leocarpus respectively. CSPG was (9.07, 3.17 and 2.25)N/mm2 in A. leocarpus, D. oliveri and G. arborea correspondingly. MOE was (2.25, 0.33 and 0.32)N/mm2 in D. oliveri, A. leocarpus, and G. arborea separately. Interactions between wood species and positions of CSPG showed base, top and middle had 8.99N/mm2, 9.08N/mm2 and 9.15N/mm2 respectively, in A. leocarpus. While in D. oliveri, (2.39, 2.73 and 4.39)N/mm2) at the middle, top and base respectively. G. arborea had (2.44, 2.77 and 4.53)N/mm2 at the middle, top and base respectively. Also, CSLG results were 4.9N/mm2, 4.48N/mm2 and 3.72N/mm2 at the base, middle and top respectively. G. arborea trend showed an increase from the base of 5.46N/mm2 to the middle of 6.08N/mm2 and the highest at top 8.62N/mm2. Density values were 955 kg/m3, 915kg/m3, 905kg/m3 at the base, middle and top respectively, in A. leocarpus. In D. oliveri, it was 702kg/m3, 92kg/m3and 582kg/m3 at the base, top and middle respectively. Whereas, in G. arborea it was 692kg/m3, 552kg/m3and 668kg/m3 at the middle, top and base respectively. MOE indicates that A. leocarpus was peak (0.3575 N/mm2) at the base and lowest (0.3150N/mm2) at the middle. D. oliveri was highest (0.2790N/mm2) at the base and lowest (0.2303N/mm2) at the top. G. arborea was highest (0.3298N/mm2) at the base and lowest (0.2968N/mm2) at the top. Conclusively, A. leocarpus and D. oliveri and G. arborea wood species are recommended for carpentry, fuel wood production, building materials and carving for fine texture, durability, and good finishing.
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