Characterisation of the Chemical Composition of Aningeria robusta: A. Chev WOOD

##plugins.themes.bootstrap3.article.main##

  •   John F. Nabirye

  •   Samuel Nwosu

Abstract

The study was carried out to assess the chemical composition of Aningeria robusta wood. Two stands of Aningeria robusta were purposely sampled for felling at The National Forestry Resources Research Institute (NAFORRI), Kifu, Uganda. From each felled tree, samples were taken at the base, middle and top portions of the merchantable height and were later partitioned into core wood, middle wood and outer wood across the radial plane. A split plot statistical method was used to test the significance of the variability in the wood chemical components examined at a 5% level of probability. A followup Duncan Multiple Ranged Test was also carried out to further examine the extent of significance. The results showed that the mean value for cellulose content was 46.78%, with a consistent pattern of variation occurring both along the tree and across the radical plane. Also, a significant effect was noticed radially and axially. The lignin content had a mean value of 22.20%. It ranged from 20.48 to 23.04%, with an increasing pattern of variation from base to top and core wood to outer wood. The extractive content mean value was 5.0%. It ranged from 4.25 to 5.65%, increasing steadily from base to top and from core wood to outer wood. There was significant effect at P=0.05, both along and across the tree. The results obtained from the research study shows that the percentage chemical composition of Aningeria robusta is satisfactory for a typical hardwood species. The chemical components in the main vary in a consistent pattern both in axial and radial directions. The rich cellulose base of A. robusta wood makes it a good potential resource for paper-making furnishing. Therefore, wood Aningeria robusta should be explored for the chemical production of pulp for papermaking. The significant content of extractive in A. robusta also suggests conferment of natural durability to the wood. Hence, A. robusta wood can be recommended for structural application as suitable substitute for such known wood species as Milicia excelsa and Tectona grandis that are fast going into extinction due to over-exploitation.


Keywords: Aningeria Robusta, Cellulose Content, Chemical Composition, Extractive Content, Lignin Content.

References

Barkas IO. Fiber dimension characteristics and effect on paper quality. Finish pulp and paper resources journal. 1999; 5: 21-52.

Akachuku AE. A study of relationship among some wood features in a hardwood species. Journal of tropical forest resources. 1980; 5: 72-83.

Majekobaje AR. Potentials of Chromolaena odorata Linn. extract as wood preservative against fungal attack. MSc Thesis, University of Ibadan, Nigeria. 2018; pp. 27.

Olayanu CM, Omole AO, Adeyemo SM, Majekobaje AR, Areo OS. Evaluation of selected physical properties of Blighia sapida K. Koenig wood. European Journal of Agriculture and Food Sciences. 2022; 4(2): 58-66.

Dinwoodie JM. Composition and structure of wood chemistry. Institute of forestry journal, Review of literature, Tappi. 2000; 48: 437-440.

Browning BI. Manufacture of pulp in which different grade of paper can be produced. Pulp and paper resources journal. 1999; 8: 20-30.

Hearmon RF. Extractives and their significance to the pulp and paper industry. Unasylvia. 1999; 1(2): 4-6.

Riki JTB, Adeyemo SM, Majekobaje AR, Oyelere AT, and Oluwadare AO. Density variation in axial and radial positions of Caribbean pine (Pinus caribaea Morelet) grown in Afaka, Nigeria. Journal of Agriculture and Environment. 2019; 15(2): 163-171.

Gbadamosi JO. Evaluation of the structure of pulp and paper industry. Nigerian Journal of Forestry. 2001; 20(3): 45-49.

TRADA. Timber of the world publications. Construction Press Ltd., Lancaster, England. 1979; 463.

Okai R. Characterisation of moisture content and specific gravity of branch wood and stem wood of Aningeria robusta and Terminalia ivorensis. Holzals Rohund Werstoff publisher springer – verlag. 2003; 61(2): 155-158.

Keay RWJ, Onochie CFA, and Standfield DP. Nigerian Trees Vol. 11 Publications of Department of Forestry Research, Ibadan. 1964; Pp 495.

Dalziel JM, and Hutchinson J. Variation in some structural features and properties of Gmelina arborea. Tropical science. 1963; 1: 23-27.

Oyelere AT, Riki JTB, Adeyemo SM, Majekobaje AR, Oluwadare AO. Radial and axial variation in ring width of Caribbean pine (Pinus caribaea Morelet) in Afaka Plantation, Kaduna State, Nigeria. Journal of Research in Forestry, Wildlife and Environment. 2019; 11(3): 81-89.

Majekobaje AR, Adeyemo SM, and Ogunsanwo OY. Biocidal Action of Chromolaena odorata Extract on Ganoderma lucidum and Sclerotium rolfsii. European Journal of Agriculture and Food Sciences. 2022; 4(3): 35–39.

ASTM. American society of testing and materials standards of methods for testing small clear specimen. ASTM. 1996; 34-94.

Akpoture E. Variation in extractive and mineral contents and wood density of some mangrove tree species in Nigeria. Ph.D. thesis, Department of Forest Resources Management, University of Ibadan. 1992; Pp 238.

Shupe TF, Choong ET, and Gubson MD. Shrinkage of outer wood, middle wood and core wood of two sweet gum trees. Wood and fibre science. 2001; 27(24): 384-388.

Uprichard JM. Influence of tree age on the chemical composition of Radiata pine. New Zealand Journal of Forestry Science. 1998; 10(30): 551-557.

Mobolaji OC, Adeyemo SM, Majekobaje AR, Olusola AO, Omole AO, Oyelere AT, Alagbada OR, and Oluborode JO, Evaluation of Selected Mechanical Properties of Blighia sapida K. Koenig Wood. Asian Journal of Applied Sciences. 2022; 10(3): 258-266.

Barkas IO. The Chemistry of wood, New York, Interscience Publishers. 2000; 3(6): 430-436.

Stringer JW and Olson JR. Radial and vertical variations in stem properties of Javeline black locus (Robinia pseudoaccasia). Wood Fibre Science. 1987; 19(1): 59-67.

##plugins.themes.bootstrap3.article.details##

How to Cite
Nabirye, J. F., & Nwosu, S. (2022). Characterisation of the Chemical Composition of Aningeria robusta: A. Chev WOOD. European Journal of Agriculture and Food Sciences, 4(5), 38–42. https://doi.org/10.24018/ejfood.2022.4.5.554