KHAYA IVORENSIS PDF
The tree is widely exploited for its very valuable timber, which is traded internationally, and plantations have been established in several countries. A high. Identity. Top of page. Preferred Scientific Name. Khaya ivorensis A. Chev. Preferred Common Name. African mahogany. International Common. Khaya ivorensis is distributed from Côte d’Ivoire east to Cameroon and south to Cabinda (Angola); it possibly also occurs in Guinea, Liberia.
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Trees are sometimes leafless for a short ivorensos at the beginning of the dry season. Some of these showed significant antifeedant activity in ivorensi, and some antifungal and antibacterial activities. The wood is moderately durable and can be susceptible to termite and pinhole borer attacks. The combined effects of selection of provenances with genetic resistance and appropriate silvicultural practices could have a substantial positive impact on the damage caused by Hypsipyla robusta stem borers.
More research is needed on appropriate management systems in natural forest to ensure a sustainable exploitation. Young trees have a slender stem and a small crown. Later it was planted in lines as enrichment of degraded forests, mixed with other species, at a distance of 7—25 m between lines and 3—7 m within the line, and some trees showed an annual diameter growth of over 2.
Limonoids have been isolated from the bark and seeds. Its bark is ivorensiw and is used to make many things such as furniture and paneling.
Trees planted in the open in the evergreen forest zone reached an average height of 12 m and an average bole diameter of 15 cm after 8 years. The wood holds nails and screws well and glues satisfactorily. Articles lacking in-text citations from March All articles lacking in-text citations Articles with ‘species’ microformats Taxonomy articles created by Polbot.
The high buttresses at the base of the bole often igorensis the construction of a platform before felling can take place, or the removal of the buttresses before felling to recover more timber.
The proportion of Khaya ivorensis in these amounts is obscure. The heartwood jhaya strongly resistant to impregnation, the sapwood moderately resistant.
Ground young shoots and leaves are applied externally khayya an anodyne. Please help to improve this article by introducing more precise citations. It has been suggested that the addition of seeds at favourable sites is a realistic option to obtain sufficient regeneration after logging.
The grain is straight or interlocked, texture rather coarse. In other projects Wikispecies. It turns fairly well. The wood trade names: The bark showed anticonvulsant activity in mice.
The bitter-tasting bark is widely used in traditional medicine. The oil can be used as an additive in liquid soaps, and may act as an antibacterial and antifungal agent because of the presence of limonoids such as methylangolensate.
The wood is usually fairly easy to saw and work, although the presence of interlocked grain may cause some difficulties. Khaya species strongly resemble each other in flowers and fruits, and differences are most prominent in their leaflets.
Khaya ivorensis (PROTA) – PlantUse English
Once dry, the wood is fairly stable in service. In the nursery, light shade is advantageous for seedlings up to 2 years old; this reduces attacks by Hypsipyla shoot borers and the development of leaf galls. It is mostly found in West Africa and southern Nigeria. The heartwood is pale pinkish brown to pale red, darkening to deep brown with a golden lustre upon exposure. In Nigeria Khaya ivorensis trees are locally retained in cocoa plantations to serve as shade trees and ultimately for timber production.
Management under the tropical shelterwood system seems most appropriate. The seeds are used in soap production.
Logs may have a spongy or brittle heart, and care is needed in felling and sawing operations. Extensive lateral growth starts when the upper canopy of the forest has been reached. The tree’s bark is bitter and can be used as a natural remedy for coughs and whooping cough.
It is suitable for light construction, light flooring, ship building, vehicle bodies, handles, ladders, sporting goods, musical instruments, ivoeensis, novelties, precision equipment, carving, turnery and pulpwood. This may be partly due to some genetic resistance against Hypsipyla robusta attack.
Roberty and Triplochiton scleroxylon K. Views Read View source View history. The seeds are often already attacked by insects while they are still on the tree, and undamaged seeds should therefore be selected before sowing. The sapwood is often removed mhaya after felling to prevent attacks by ambrosia beetles. The monoaxial state may persist to a height of 10 m.
Khaya ivorensis typically grows in drier climates. Natural regeneration of Khaya ivorensis after logging is often poor due to the often low density of mature trees in the forest and low regeneration rates in heavily disturbed forest.
A natural forest tree with a bole diameter of 80 cm yields on average 6. Realistic rotation cycles in natural forest are probably khaua the range of 60—80 years. At 34 years after planting dominant trees were 76 cm in diameter, khata the bole was branchless for only 12 m. In Gabon 4-month-old seedlings have been planted after clear-cutting of the forest, and in other sites after removal of the forest undergrowth and thinning of the upper canopy.
The wood can be finished to a smooth surface, but the use of a filler is required in staining and varnishing. In moist evergreen forest Khaya ivorensis can be found flowering and fruiting throughout the year and bearing flowers and fruits at the same time; usually flowering is seasonal, in West Africa being most abundant in June—October.