Studies on raising and preparation of planting stock of three indigenous forest timber species in Nigeria

Abstract

Seed germination studies, seedling growth, planting stock preparation and field trial at planting espacement of 3 m x 3 m were evaluated in the study. Soaking seeds in tap water for ten days with daily replacement of water yielded 100% seed germination for A. africana, 100% for A. boonei and 90% for A. lebbeck respectively in light condition. These values were better than those obtained in the control and dark condition. Growth values observed in forest topsoil were significantly different from those from river sand. From Forest Topsoil the total plant heights were 98 ± 16.33 cm for A. africana, 41 ± 6.83 cm for A. lebbeck and 70 ± 11.66 cm for A. boonei while from the river sand, A. Africana had 36 ± 6.0 cm, A. lebbeck had 26.3 ± 4.38 cm and A. boonei had 25.6 ± 4.27 cm. The field trial showed that there is prospect of successful domestication of these species using stumps or seedlings as planting stock. Significant difference was not observed in the trial. The only observed advantage is that more stumps can be transported than the seedlings. For quality planting stock production, soaking the seeds of the species under study for 10 days with daily replacement of water, forest topsoil as seedling growth medium, stumps and seedlings as planting stock are recommended.

Effect of acid pre-treatment and potting media on seed germination and early seedling growth of Albizia Lebbek

“…The growth response of seedlings in the topsoil with regards to growth parameters viz; height, leaf number and leaf area was significantly higher (p<0.05) when compared with the rest of the treatments. This observation conforms with the assertions of Ehiagbonare, and Onyibe [24] who reported better seedlings growth of Albizia lebbeck and other tree like Alstonia boonei and Afzelia Africana on topsoil. Also, the observed maximum value recorded in leaf number, height, stem diameter and leaf area for seedlings grown on topsoil media shows that topsoil had the best effect on the seedlings growth parameters and this could be attributed to its high-water retention and high organic matter content compared to other media.…”

Effects of seed provenance and growth media on the growth performance of Vitellaria paradoxa C.F. Gaertn.

“…Thus, effects of growth media on germination and emergence of seedlings were significant with growth media having top soil in their composition forming better media for germination; which is in line with the findings of Adeoluwa et al (2014) in the growth study of Ficus retusa. In addition, Ehiagbonare and Onyibe (2008) observed that forest topsoil supported better seedlings growth of Albizia lebbeck, Alstonia boonei and Afzelia africana than river sand. Germination percentages were highest for Saki and the most appropriate medium being the topsoil + sawdust combination.…”

Chemical Constituents from Fruits and Stem Bark of Celtis australis L.

“…Often, a OH group at C(3) is observed in triterpenoids, but in compound 1, the OH group is positioned in the side chain, which was confirmed by long-range correlations of HÀC(31) (d(H) 3.41) to C(22) (d(C) 30.1) and C(33) (d(C) 8.5) in the HMBC spectrum. In addition, the correlation CH 2 (1)/CH 2 (6) to C(4) (d(C) 42.8) and CH 2 (1)/HÀC(5) to C(3) (d(C) 30.8) clearly evidenced the structure of ring A without OH substitution at C(3). From the HMBC of HÀC (21) to C(29) (d(C) 17.9) and C(30) (d(C) 34.2), the position of the side chain at C(21) was determined ( Fig.).…”

“…All the spectral data for 6 were found to be similar to those of 2-hydroxy-1,3,4-trimethoxyanthraquinone [21], except for the additional AcO group. A singlet (d(H) 7.68) and two doublets (d(H) 7.22 and 7.94) in the 1 H-NMR spectrum in the aromatic region clearly indicated the position of the AcO group at ring A, either at C (6) or C (7). The NOESY correlation between (d(H) 3.70) MeOÀC(3) and MeOÀC(4) (d(H) 3.30) clearly showed that the two MeO groups must be placed at adjacent C-atoms.…”

“…The plant has been used as remedy for bone fracture, pimples, contusions, sprains, and joints pain in the traditional Indian medicine [1]. Previous studies on the plants of the genus Celtis led to the isolation of phenolic glycosides [2], steroids [3], terpenoids [4] [5], and tannins, saponins, and alkaloids [6]. From the leaves of C. australis, three phenol derivatives, acacetin 7-O-glucoside, isovitexin, and cytisoside were reported [7].…”