Talk:Acacia mangium

Improvements
Dear writers

I'd like to improve the wikipedia entry of Acacia mangium in different ways. I'd like to add the subjects: Cultivation, Use, Ecological aspects. There are lots of papers with interesting information I'd like to take to do so. regards --Schwepat (talk) 14:44, 7 November 2012 (UTC)


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Dear writers and users

I did some literature studies about Acacia Mangium and suggest the following restructurations and additional informations. If you have any corrections or suggestions please give me a feedback.

Acacia mangium is a species of flowering tree in the pea family, Fabaceae, that is native to northeastern Queensland in Australia, the Western Province of Papua New Guinea, Papua, and the eastern Maluku Islands. Common names include Black Wattle, Hickory Wattle, Mangium, and Forest Mangrove. Its uses include environmental management and wood.

Cultivation
Acacia mangium grows up to 30 m, often with a straight trunk. A. mangium has about 142,000 seeds/kg. To break down dormancy mature seed requires pre-germination treatment such as mechanical scarification (scratching the surface) or boiling water. This treatment leads to a fast germination and typically exceeds 75%. Like many other legumes, it is able to fix nitrogen in the soil. A. mangium is a popular species for forest plantation and used more and more also for agroforestry projects. In mixed cultures, plants can profit of the shadow from A. mangium and the nitrogen fixation A. mangium will tolerate low fertility soils with impeded drainage, but prefers fertile sites with good drainage. Soil depth and topographic position can influence yields. With respect to distance from the equator, there are significant differences in performance under cultivation. A mean annual height increase of about 3 to 4 m is usual near the equator. In areas further from the equator growth is lower.

Timber
A. mangium trees produce sapwood and heartwood. The heartwood’s colour is brownish yellow shimmery and medium textured. Because the timber is extremely heavy, hard, very strong, tough, and liable to warp and crack badly it is used for furniture, doors and window frames. The glossy and smooth surface finish after polishing leads also to a potential for making export orientated artifacts.

Ecological Aspects
Because Acacia mangium trees largely increase the turnover rate of N in the topsoil, it might improve also the mineral N availability in soils in mixed cultures. Due to the fact that it is a very fast growing tree it develops an intensive rooting system, particularly in a low fertility soil. That helps to recover degraded tropical lands for what A. Mangium is very useful. The Tree is widely used in Goa in the mining industry for rehabilitation of the waste dumps as it is a drought resistant species and binds the sterile mine waste consisting of lateritic strata.

Chemistry
The gum contains 5.4% ash, 0.98% N, 1.49% methoxyl, and by calculation, 32.2% uronic acid. The sugar composition after hydrolysis: 9.0% 4-0-methylglucuronic acid, 23.2% glucuronic acid, 56% galactose, 10% arabinose, and 2% rhamnose.

Gallery
mangium Category:Flora of New Guinea Category:Flora of Indonesia Category:Fabales of Australia Category:Flora of Queensland Category:Trees of Australia

Acacia mangium Acacia mangium Acacia mangium Plačialapė akacija മാഞ്ചിയം Acacia mangium กระถินเทพา Keo tai tượng

External links modified
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