University of technology akure, ondo state, nigeria, between may 2012 and september 2012. Physical and mechanical properties of selected wood. Pdf ecogeographic variation in leaf morphology of african. Khaya senegalensis was introduced to sri lanka about 30 years ago and in the past 10 years it has become one of the priority species for timber plantation establishment in their dry zone ca. African mahoganys khaya ivorensis is a very large tree that attains a height of 4050 m and a dbh of up to 2 m. The species were khaya anthotheca ka, khaya ivorensis ki, khaya grandifoliola. Khaya ivorensis is a very large evergreen tree which can be deciduous in drier climates, that attains a height of 40 50 metres. Tree basal area models and density for selected plantation. Often further classified as to port of shipment or country of origin.
Sustained diurnal stimulation of cyclic electron flow in. Therefore, in this study the in vitro activities of the cold and hot extracts of the stem barks of the three khaya species used in the management of scd were evaluated using standard antisickling. The structures of compounds 14 were established on the basis of extensive spectroscopic analysis. Khaya senegalensis, khaya grandifoliola, khaya ivorensis, khaya. Ecogeographic variation in leaf morphology of african mahogany khaya anthotheca and khaya ivorensis provenances in ghana article pdf available in european journal of scientific research. The objectives of this study were to determine the initial effects of macronutrient deficiency on the growth and vigour of khaya ivorensis seedlings. African or dry zone mahogany khaya senegalensis desr. The experimental plantations included tree species that repre. Pdf khaya senegalensiscurrent use from its natural range. 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 identification of the species.
In accordance with their mandate and the reccomandations of their statutory bodies, fao and unep agreed to undertake a reassessment of the present situation and current evolution of the forest resources of the tropical world within the framework of the global environment monitoring system gems. 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. Khaya antotheka cannot be sliced due to the hardness of this wood. It grows many white flowers at the end of its branches. To examine its potential for clonal propagation, the effects of cutting length, leaf area, stockplant maturation, auxin, and smoke solution treatments were investigated. Khaya e um genero equatorial botanico pertencente a familia meliaceae, e nativo da africa. It is well known that diameter variation can help explain volume variation. Leaf morphometric variation in two species of african mahoganies. Khaya ivorensis and khaya anthotheca meliaceae article pdf available june 2011 with 474 reads how we measure reads. Unlike other khaya species which do not require much rainfall, it is reported to grow in the rain forest in lowlying areas within its range. Limonoids from the fruits of khaya ivorensis kailong ji 1,2, shanggao liao 3, xiaoling zheng 1,2, zhi na 1, huabin hu 1, ping zhang 1, and youkai xu 1. Meliaceae, a source of one of the most popular traditional african medicines, is mainly distributed throughout angola, cameroon, and nigeria adesida et al. Khaya is a genus of five species of trees in the mahogany family meliaceae.
The objectives of this study were, first, to determine and compare the growth of k. Wood database and searchable library woodworkers source. It is found in angola, cameroon, cote divoire, gabon, ghana, liberia, and nigeria where it grows primarily in lowland tropical rainforests. Meliaceae african mahogany benin mahogany senegal mahogany other common names. Comparative ecological wood anatomy of african mahogany khaya ivorensis with special reference to damage caused by hypsipyl robusta shootborer rinne e. Promotion and utilization of plantation grown timber species.
Antibacterial and toxicological properties of essential oils. Khaya grandifoliola khaya ivorensis hypsipyla robusta attack. Antifungal activity of limonoids from khaya ivorensis. Khaya ivorensis and citrus sinensis were evaluated for their proximate composition, chemical properties and fatty acid profiles. Other common names are gold coast mahogany, ivory coast mahogany, nigerian mahogany.
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. African mahogany khaya ivorensis in integrated croplivestockforest system in the eastern amazon. Tree growing in the african section of hoomaluhia botanical garden on oahu is it terminalia ivorensis. Meliaceae is a genus of eight species mainly distributed in africa and madagascar 3. 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. Biomass compaction improved its energetic and physicalmechanical characteristics and is the indicated technique for the energetic use of 7yearold k. Khaya ivorensis name synonyms khaya caudata stapf khaya caudata stapf ex hutch. World news of natural sciences 303 2020 281296 282 1. Khaya ivorensis, also called african mahogany or lagos mahogany, is a tall forest tree with a buttressed trunk in the family meliaceae. Khaya ivorensis exotic species and hopea odorata indigenous species are among the promising tree species for forest plantation in malaysia as alternatives to. Forestry research institute of ghana trial plots at benso in the wet evergreen forest ecological zone on ghana.
Std species group chip calibration scale b c e f g h j. Harvested from central africa, our khaya ivorensis is known to offer a more consistently unifom color, and an evenly textured grain, compared to other species of khaya. Nutrient deficiency may adversely affect the growth and quality of seedlings in forest nurseries. Munyama uganda, acajou dafrique ivory coast, dubini, dukuma fufu ghana, ogwango nigeria. Four triterpenoids from stem bark of khaya anthotheca article in phytochemistry 6610. National plant germplasm system covid19 update, march 23, 2020. Khaya ivorensis in the germplasm resources information network grin, u. Gum exudate from khaya ivorensis was evaluated for their physicochemical and rheological properties.
Usually sold as either quartered or flat sawn grain. Before requesting germplasm, scientists should consider their capacity to receive it. The present study was carried out to determine the antibacterial properties of the essential oils of these plants against the selected bacterial isolates and to establish or. The wood species includes meliceae excelsa, khaya ivorensis, triplochiton scleroxylon, afzelia africana and celtis mildbraedii. In plantations khaya ivorensis may suffer seriously from hypsipyla robusta shoot borers that kill the main stem of young trees, causing excessive branching and contributing to mortality. Spatial characteristics and economic value of threatened. Khaya senegalensis e khaya ivorensis j larix decidua c larix kaempferi c larix leptolepis c larix occidentalis f liquidamper styraciflua a lovoa klaineana j lovoa trichiloides j maesopsis eminii j mansonia altissima b millettia stuhimannii a mimusops heckelii b mitragyna ciliata e. African mahogany lumber wholesale supplier khaya ivorensis. Its ethanol stem bark extract has shown tissue toxicity, antimalarial and antiinflammatory activities 5. Khaya ivorensis, a key species of the african mahoganies, is included in the iucn. Mechanical values category green dry units weight 40 31 lbscu. Pdf developing african mahogany khaya senegalensis.
Chemical investigation of the diethyl ether extract of the stem bark of khaya ivorensis a chev meliaceae afforded ten limonoids of angolensates, ring d. Limonoids from the fruits of khaya ivorensis kailong ji 1,2, shanggao liao 3, xiaoling zheng 1,2, zhi na 1, huabin hu 1, ping zhang 1, and youkai xu 1, 1 cas key laboratory of tropical plant resource and sustainable use, xishuangbanna tropical botanical garden, chinese academy of sciences, menglun, mengla, yunnan 666303, china. Pdf growth performance and biomass accumulation of a. A ban on the export of timber in log form was introduced in ghana. 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. Lakehead university, faculty of forestry, thunder bay, ontario, canada. Department of agriculture agricultural research service. 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 identification of the. Four triterpenoids from stem bark of khaya anthotheca.
Khaya ivorensis is greatly used as timber and little is known about its extracts especially the essential oil of the seed. The psi activity as indicated by the maximum quantity of photooxidizable p700 was maintained stable during the daytime. Volume equations for khaya ivorensis in brazil 3287 classes with amplitude equal to the mean value plus and minus one standard deviation. The species is reported to be found in all the timber producing areas of west africa, from ivory coast to gabon and cabinda, and is primarily found in the ivory coast, ghana, and nigeria. Khaya ivorensis is a species in the african mahogany family. Interlocked grain is difficult to surface without tearing. Khaya senegalensis e khaya ivorensis j larix deciduas c larix kaempferi c larix leptolepis c larix occidentalis f liquidamper styraciflua a lovoa klaineana j lovoa trichiloides j maesopsis eminii j mansonia altissima b millettia stuhimannii a mimusops heckelii b mitragyna ciliate e. Khaya senegalensis is a multipurpose african timber species. Two new limonoids, namely 14,15didehydroruageanin a 1 and 3omethyl butyrylseneganolide a 2, were isolated from the fruits of khaya ivorensis along. Stem wood structure of four ghanaian khaya species. Africa mahogany khaya spp is a member of the family meliaceae distributed. Harvested from central africa, our khaya ivorensis is known to offer a more consistently unifom color, and an evenly tex.
The purpose of this investigation was to determine the antiplasmodial activity of khaya ivorensis k and alstonia boonei a preparations in the murine malaria model plasmodium bergheianopheles stephensi, to estimate their prophylactic potential and to assess acute and subacute toxicity of the formulations prepared according to the traditional recipes. 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. Its woody fruit is slightly thinner than those of khaya grandifoliola. The inhibition efficiencies of the gum were found to increase. Dialairi ivory coast, ghana, akuk, ogwango nigeria, eri kiree uganda, bandoro sudan. The timber of khaya is called african mahogany, and is valued as a substitute to genuine mahogany of the genus swietenia. Restoration of degraded dry semideciduous forest ecosystems.
Acajou dafrique page 2 of 3 tropix 7 19982012 cirad dissemination without express authorization is prohibited 11262014 drying rapid slight risk no slight risk. Heartwood and sapwood of two african mahogany species, khaya ivorensis and khaya senegalensis, were evaluated for resistance to decay by. The difference, however, can only be seen with great difficulty if at all. Department of biosciences, university of helsinki, po box 65, fi00014 university of helsinki, finland, email. Potential of a khaya ivorensis alstonia boonei extract. Effect of overstory tree species diversity and composition. Introduction forest is a highly complex, constantly changing environment made up of a variety of. General information khaya ivorensis is a very large evergreen tree which can be deciduous in drier climates, that attains a height of 40 50 metres. There was no information about the relationship between growth parameters, such as diameter and height and tree component biomass of khaya ivorensis plantations with different soil types. The development of clonal propagation could improve plantation establishment, which is currently impeded by mahogany shoot borer.
Common names africanmahogany in english ivory coast khaya in english lagosmahogany in english. Effects of macronutrient deficiencies on the growth and vigour of khaya ivorensis seedlings. In this study, the variation in chemical composition and natural durability of both plantation grown and natural african mahogany harvested in ghana were evaluated using tappi standards, astm d 175806 2008 and awpa e707 2008. Principally differentiation is made between two species. The wood were machined and trimmed to standard size of 20mm x 20mm x 60mm for the. Antisickling activities of the stem bark of three khaya. 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. Tepongning rn1, lucantoni l, nasuti cc, dori gu, yerbanga sr, lupidi g, marini c, rossi g, esposito f, habluetzel a. The biomass and charcoal characteristics of 7yearold khaya ivorensis indicated lower quality parameters than the main forest species used for energy purposes. The faounep tropical forest resources assessment project, signed on 8 november 1978 by both. Under the decree, uprooting or damage to this species is prohibited, as is the destruction of their fruits and seeds. Three species are found along the western african region and they are khaya senegalensis ks, khaya grandifoliola kg and khaya ivorensis ki.
Khaya anthotheca is a large evergreen tree up to 60 m tall up to 30 m in the garden with an elongated or rounded, muchbranched crown. The structures of the limonoids isolated were determined by comparison of their 1 h and c nmr data with those reported in the literature. Combining morphology and population genetic analysis. Four limonoids, 1odeacetyl6deoxykhayanolide e 1, 1odeacetyl2. Nov 11, 2016 little information exists on the properties of tropical tree species that are now being used in plantations in different tropical countries including ghana. 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. Moreover, khaya ivorensis recorded significantly p ivorensis is the only mahogany species which could be selectively extracted from bowiye and draw forest reserves. Guide technique du boisement programme solidarite eau. 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.
1199 412 796 131 1349 1294 64 415 786 37 999 296 848 118 579 1331 1511 1183 481 1103 479 1386 1112 89 472 169 714 353 1124 190 675 3 593 508 921 314 126 441 185 1104 171 675 37 452 762 482