ISSN 2375-0979
African Journal of Wood Science and Forestry ISSN 2375-0979 Vol. 8 (1), pp. 001-010, January, 2020. © International Scholars Journals
Full Length Research Paper
Extractive contents from parts of Anthocleista djalonensis (A) in different diameter classed-trees in parts of Rivers State, Nigeria
David-Sarogoro, Nwiisuator
Department of Forestry & Environment, Rivers State University, Port Harcourt
Accepted 17 April, 2019
Abstract
The study analyzed and quantified the extractive contents of the leaves, stembarks, rootbarks and diameter classes (DCs) of woods of Anthocleista djalonensis and used Randomized Complete Block Design with seven treatments replicated three times. DCs of trees 3-10cm, 11-15cm and 16-25cm were measured with a diameter tape. The results of wood DCs showed significant difference (P≤0.05) between the extractive contents (ECs) of DCs: tannin ranged from 0.10% to 0.36%, flavonoid was fairly constant within 0.30% to 0.40%, saponin ranged from 5.43% to 8.56%, there was no cyanogenic glucoside in the species. Oxalate ranged from 1.60% to 2.64and alkaloid ranged 2.56% to 4.61% while results of ECs on DCs in leaf and rootbark indicated significant difference (P≤0.05: P-v= 0.035822 ) between the DCs of the leaf and rootbark: in 3-10cm DC in Tai, Eleme and Agric Farm, RSU had tannin 0.56% and 0.60% but decreased from 0.70% to 0.40% within 11-15cm DC in all locations but in Agric Farm, RSU, flavonoid showed was significance (P≤0.05: P-v= 0.001593): in the rootbark, flavonoid ranged from 1.89% to 2.66% in all the locations and within all the DCs while in the leaf, it ranged from 1.24% to 1.98%. Saponin showed highly significance (P<0.05: P-value=1.16E-10): saponin ranged from 0.60% and 1.65%, oxalate content ranged from 1.10% to 1.43% and 10.23% to 14.67% in leaf and rootbark respectively in all locations and DCs and showed very high significance (P<0.05: P-v=6.2E-13), phytate content in leaf ranged from 0.65% to 0.83% while in rootbark, it ranged from 0.87% to 1.56%: phytate was more in rootbark than in the leaf and indicated P<0.05:P-value=4.34E-05 and alkaloid ranged from 0.78% to 9.12% in the leaf while in the rootbark, it ranged from 3.67% to 4.78% but showed no significance (P>0.05:P-value= 0.615367). The wood of Anthocleista djalonensis contained anti-nutritional properties which confers durability and strength which could enhance its utilization status. Consumption in moderation of Anthocleista djalonensis by human is recommended since phytate content is far lower than the standard. The high extractive contents of the species could be precursors or raw materials in the pharmaceutical and chemical industries, therefore further study into this is recommended.
Keywords: Extractive contents, diameter classes, rootbark.