It most closely resembles the wood of khaya grandifoliola c. Khaya ivorensis khaya senegalensis natural durability fungal decay termite damage abstract african mahogany khaya spp. In addition, it was established that leaf size in khaya ivorensis k. The ghana journal of forestry issn 08551707 is published by the forestry research institute of ghana. Khaya gum kg is a polysaccharide obtained from the incised trunk of the tree khaya ivorensis family meliaceae. African mahogany can be any of several woods of the genus khaya, most commonly khaya ivorensis. Khaya ivorensis and citrus sinensis were evaluated for their proximate composition, chemical properties and fatty acid profiles. Comparing the fertility of soils under khaya ivorensis. Chemical investigation of the diethyl ether extract of the stem bark of khaya ivorensis a chev meliaceae afforded ten limonoids of angolensates, ring. University of technology akure, ondo state, nigeria, between may 2012 and september 2012. Bole straight, unbranched up to 30 m above the ground with welldeveloped plank buttresses. Effects of macronutrient deficiencies on the growth and vigour of khaya ivorensis seedlings article pdf available in journal of tropical forest science 212. Harvested from central africa, our khaya ivorensis is known to offer a more consistently unifom color, and an evenly tex. The structure of 1 was fully determined by spectroscopic analysis and total syntheses of its four most possible stereoisomers.
Okali, 1979 recorded that the rainforest of nigeria. General information khaya ivorensis is a very large evergreen tree which can be deciduous in drier climates, that attains a height of 40 50 metres303. Mechanical values category green dry units weight 40 31 lbscu. Munyama uganda, acajou dafrique ivory coast, dubini, dukuma fufu ghana, ogwango nigeria.
Spectrophotometric and forlinciocalteu analyses showed that khaya ivorensis. Spatial characteristics and economic value of threatened species. Khaya ivorensis and khaya senegalensis forest service usda. Potential of a khaya ivorensis alstonia boonei extract combination as antimalarial prophylactic remedy. Article pdf available in forest ecology and management 2422. The difference, however, can only be seen with great difficulty if at all. The diverse structures and significant biological activity of limonoids isolated from the meliaceae family have prompted continuous studies on this group of metabolites taylor, 1984, champagne et al. In order, to evaluate the forest productivity and biomass accumulation of both species, we established plots with a size. Stem wood structure of four ghanaian khaya species. Comparative study of soil seed stock at hevea brasiliensis. Meliaceae is a genus of eight species mainly distributed in africa and madagascar. Ivorenolide b 1, an unprecedented 17membered macrolide featuring conjugated acetylenic bonds and four chiral centers, was isolated from khaya ivorensis.
Khaya antotheka cannot be sliced due to the hardness of this wood. In west africa, where it grows, it is referred to as the acajou wood. Khaya senegalensis occurs from mauritania and senegal east to northern uganda. Forest plantations in malaysia malaysian timber council. It is recommended that climax economic tree species such as khaya ivorensis and entandrophragma spp should be introduced. The wood were machined and trimmed to standard size of 20mm x 20mm x 60mm for the. It is commonly planted within its natural area of distribution, mainly as ornamental and roadside tree, and also outside this area, e. African mahogany is the common name for a multitude of species variants, the two most common of which are khaya ivorensis and khaya senegalensis at j. Principally differentiation is made between two species.
Khaya ivorensis is considered one of the most important timber species for plantations, combining fast growth and good timber quality. Pdf khaya anthotheca and khaya ivorensis trade name african mahogany of the family. Com as crescentes doses do metal, as plantas khaya ivorensis a. The wood of makore tieghemella is similar, but more durable.
Potential of a khaya ivorensis alstonia boonei extract. It has previously been investigated as a controlled release agent in comparison with hydroxypropylmethylcellulose hpmc using paracetamol water soluble and indomethacin water insoluble as model drugs. Meliaceous limonoids, the major metabolites of the meliaceae family, have attracted great interest in the natural products field due to their structural diversity and broad range of bioactivities 1,2. Moreover, khaya ivorensis recorded significantly p ivorensis is the only mahogany species which could be selectively extracted from bowiye and draw forest reserves.
Four limonoids, 1odeacetyl6deoxykhayanolide e 1, 1odeacetyl2. For instance, the united states imports african mahogany khaya spp. Effect of overstory tree species diversity and composition on ground foraging ants hymenoptera. Khaya senegalensis, also known as african dry zone mahogany or mubaba in the shona language, is also used. Tepongning rn1, lucantoni l, nasuti cc, dori gu, yerbanga sr, lupidi g, marini c, rossi g, esposito f, habluetzel a. Often further classified as to port of shipment or country of origin. In this study, the chemical constituents of khaya ivorensis stem bark and their termiticidal activity were investigated on triplochiton scleroxylon and vitex doniana woods.
Physical and mechanical properties of selected wood. Meliaceae is a genus of eight species mainly distributed in africa and madagascar 3. Spatial characteristics and economic value of threatened. Considering all the african mahogany species, khaya ivorensis is one of the most planted in brazil, due to its high wood quality and appearance, similar to swietenia macrophylla pinheiro et al.
Wagera aschool of forestry, northern arizona university. Its stunning colour, texture and grain give it a very close resemblance to the classic honduras mahogany. The structure of 1 was fully determined by spectroscopic analysis, singlecrystal xray diffraction, and bioinspired total synthesis. Pdf effects of macronutrient deficiencies on the growth. The psi activity as indicated by the maximum quantity of photooxidizable p700 was maintained stable during the daytime. Its distribution is tropical west, central, and east africa. Ivorenolide a 1, a novel 18membered macrolide featuring conjugated acetylenic bonds and five chiral centers, was isolated from khaya ivorensis.
The timber of khaya is called african mahogany, with properties generally regarded as the closest to genuine mahogany. Its ethanol stem bark extract has shown tissue toxicity, antimalarial and antiinflammatory activities 5. African mahoganys khaya ivorensis is a very large tree that attains a height of 4050 m and a dbh of up to 2 m. Relationship of stand attributes of some plantation. The wood of khaya senegalensis resembles true mahogany from swietenia spp. The weibull parameters of location, scale and shape were obtained for diameter data collected from plantations of lovoa trichilioides, khaya ivorensis and entandrophragma cylindricum in nigeria. Gibson mcilvain, we only stock a couple of these species, and we keep close track of which is which so we can supply consistency in color, grain, and workability to our customers. Usually sold as either quartered or flat sawn grain. Pdf provenance variation in khaya species for growth and. The writer is a senior research officer, kenya forestry research institute, karura regional research centre. Khaya ivorensis khaya ivorensis is the highest quality lumber in the african mahogany family, and is considered an acceptable and costconscious alternative to genuine mahogany sweitenia macrophylla. Forest plantations in malaysia in 2003 the malaysian timber council mtc completed and handed over to the ministry of plantation industries and commodities mpic, an important study on the establishment of large scale forest plantations in malaysia to alleviate the pressure on the countrys natural forests. The individual woods commercially available under the name khaya khaya mahogany are difficult to.
Both compound 1 and its synthetic enantiomer 2 showed potent and selective immunosuppressive. Effect of overstory tree species diversity and composition. Material and methods characterization of the study site biomass, charcoal and briquette evaluations were carried out using samples obtained from 7yearold k. The wood species includes meliceae excelsa, khaya ivorensis, triplochiton scleroxylon, afzelia africana and celtis mildbraedii. The gum was found to be soluble in water but insoluble in acetone, chloroform and sparingly soluble in ethanol indicating that the gum is ionic. Meliaceae, a source of one of the most popular traditional african medicines, is mainly. We determined the diurnal changes in psi and psii activities, light energy dissipation in psii and the p700 redox state in two tropical tree species erythrophleum guineense and khaya ivorensis grown in an open field. It is threatened by habitat loss khaya ivorensis is a species in the african mahogany family. Gum exudate from khaya ivorensis was evaluated for their physicochemical and rheological properties. Ivorenolide b, an immunosuppressive 17membered macrolide. Assessing forest plantation productivity of exotic and.
Extensive lateral growth starts when the upper canopy of the forest has been reached. The structures of compounds 14 were established on the basis of extensive spectroscopic analysis. Compound 1 showed significant immunosuppressive activity. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. The forest plantation is located in the municipality. Khaya species from western or central africa yield a reddish brown wood with little grain which is weather. Malaysian consumers perceived importance and knowledge of household furniture materials article pdf available in malaysian forester 741. Pdf physicochemical characterization of exudates from. Mahogany, ghana, identification, khaya species, qualitative, quantitative four closely related ghanaian khaya woods were studied for differences in anatomical, chemical and physical properties to enable clear. In nigeria khaya ivorensis trees are locally retained in cocoa plantations to serve as shade trees and ultimately for timber production.
Mahogany, african goosebay sawmill and lumber, inc. African mahogany lumber wholesale supplier khaya ivorensis. Pdf growth and nutritional status and quality of khaya. Interlocked grain is difficult to surface without tearing. Natural resistance of plantation grown african mahogany khaya ivorensis and khaya senegalensis from brazil to. Sustained diurnal stimulation of cyclic electron flow in. Khaya has become known as mahogany because it exhibits similar properties and overall appearance to american mahogany cuban and honduran. The coefficients obtained were then expressed as linear functions of stand attributes, viz. The journal publishes scientific articles concerned with forest management and conservation, and in particular the application of biological, ecological and social knowledge to the management of forests.
Its relatively hard and works well both with power and hand tools. Some writer had inquired whether the tropical rainforest could survive spears, 1979. Lakehead university, faculty of forestry, thunder bay, ontario, canada. General information khaya anthotheca is a large, fastgrowing, semideciduous tree with a dense crown, sometimes exceeding 60 metres in height, producing abundant panicles of. Pdf due to the shortage of information on both mineral fertilizer. Comparing the fertility of soils under khaya ivorensis plantation and regenerated degraded secondary forests 1yetti heryati, 1,2arifin abdu, 3mohd noor mahat, 1,2hazandy abdulhamid, 4shamshuddin jusop, 1nik muhamad majid, 1ika heriansyah, 1leslie ajang and 5khairulmazmi ahmad 1 department of forest management, faculty of forestry. Khaya ivorensis, also called african mahogany or lagos mahogany, is a tall forest tree with a buttressed trunk in the family meliaceae. The total phenolic and the condensed tannins content of the bark, the sapwood and the heartwood of khaya ivorensis k. Antifungal activity of limonoids from khaya ivorensis.