In North Sumatra, one enterprise plants 16 000 ha annually and in South Sumatra 300 000 ha of forest land is planned to be planted, predominantly with A. mangium . The physical and mechanical properties of hybrid Acacia, produced from natural crossing between two introduced timber species (Acacia auriculiformis and Acacia mangium) were studied. Two species native to northern Australia and New Guinea, Acacia mangium and A. auriculiformis, and their hybrids, account for over 99% of this area. Wood showing fluorescence in UV light. Turnbull, J.W., Skelton, D.J., Subagyono, M. & Hardiyanto, E.B., 1983. A direct seeding trial with A. mangium in Sabah gave 66% survival after 3 months and 30% after 6 months. Scientific or Botanical Name Acacia auriculiformis Common Names Bengali Babul, auri, earleaf acacia, earpod wattle  This acacia was originally described as Mangium montanum Rumph. Es nativo de Australia, de Indonesia, y también de Papúa Nueva Guinea. The nailing and screwing properties are satisfactory. Fodder: Not widely used as fodder, but in India 1-year-old plantations are browsed by cattle. Its rapid early growth, even on infertile sites, and tolerance of both highly acidic and alkaline soils make it popular for stabilizing and revegetating mine spoils. Click on "show more" to view them. A su vez, las hojas presentan un pulvínulo, pudiendo s… Turnbull, J.W., 1986. Materials and methods A total of 56 A. mangium, 14 A. auriculiformis, and Acacia species are pioneers and demand full light for good development; in shade A. mangium grows stunted and spindly. 196 pp. It exhibits much variation in pubescence, size and venation of the leaflets and size of flowers and heads. National Academy Press, Washington D.C. 62 pp. [2 Descripción. In Thailand, preliminary results from research indicate that A. crassicarpa may prove to be a very valuable species for industrial plantations. For the production of seedlings, the pods should be processed as soon as possible after harvesting. Its phyllode is about 4–6 cm wide and 15–20 cm long, with four It also has associations with both ecto- and endo-mycorrhizal fungi. Erosion control: Its spreading, superficial and densely matted root system makes A. auriculiformis suitable for stabilizing eroded land. Another option is direct sowing in containers (polythene bags, open-ended hanging pots called "root trainers" or other permanent pots) followed by pricking out to maintain one seedling per container. Fibres (0.9-)1.1-1.2(-1.3) mm long, non-septate, thin-walled to moderately thick-walled, with inconspicuous and simple to minutely bordered pits; tension-wood fibres common. Silvicultural schedules, especially those regarding the spacing, pruning and thinning and management of subsequent rotations, are not well known yet or at least are not well publicised. Acacias for rural, industrial, and environmental development. A. leptocarpa is possibly very variable genetically, and selection of good provenances may easily raise the productivity in plantations. In their natural habitat the species are found in a wide variety of vegetation types, ranging from grassland, swamp grassland, savanna, savanna woodland, to dry evergreen monsoon forest. ex Benth. Parenchyma sparse to moderately abundant paratracheal, vasicentric, usually in prominent sheaths, 2-4 cells wide around the pores, tending to aliform particularly around the smaller pores, in 2-4-celled strands. Tropical Acacias in East Asia and the Pacific. A. auriculiformis wood contains 66% holocellulose, 35%α-cellulose, 31% lignin, 16% pentosan and 1.5% ash; the solubility is 9.7% in alcohol-benzene, 10.6% in hot water and 24.0% in alkali. Most Acacia species are fast growing and suitable for planting on Themeda and Imperata cylindrica grasslands (although the growth is not optimal under this condition) and sites degraded by logging. All affected wood at the site should be destroyed before replanting. It is recommended to saw the comparatively heavy wood of A. catechu when green. Most of the species are found on the Southern Hemisphere and the main centre of diversity is located in Australia and the Pacific. The hybrid's height and diameter increments are significantly better. caused by pruning) and is also known as white rot, as the affected wood becomes whitish, spongy or fibrous and is surrounded by a dark stain. Mangium and other fast-growing acacias for the humid tropics. The wood from these plantations is mainly used as pulp, but no statistics are available on production and trade. Heart rot is much less common in Sabah than in Peninsular Malaysia. Soil improver: Plantations of A. auriculiformis improve soil physio-chemical properties such as water-holding capacity, organic carbon, nitrogen and potassium through litter fall. Average annual rainfall is 1450-1900 mm in southern New Guinea, and 2100 mm in northern Queensland. Acacia auriculiformis, llamado comúnmente acacia de vaina orejuda, es un árbol de rápido crecimiento de aspecto poco agraciado y retorcido de la familia Fabaceae. The rates of shrinkage are fairly low to moderate: from green to 12% moisture content 1.0-1.4% radial and 2.3-4.2% tangential. The pulp is suitable for the manufacture of liner boards, bags, wrapping papers and multiwall sacks. timber but also to determine the conditions that are suit-able for the development of Acacia species which could provide wood with a lower moisture content. A. mearnsii and A. auriculiformis are generally outcrossing, and have estimated outcrossing rates of 67-89% and 93%, respectively. The timber is moderately heavy, strong and stable The species of Acacia mainly occur in savanna ecosystems, having a greater tendency to exploit arid or semi-arid regions rather than wetter forested regions, and may constitute a characteristic element of the vegetation there. Acacia species are often found associated with Melaleuca , Eucalyptus , Tristania , Alstonia , Dillenia , Xanthostemon , Grevillea , Planchonia and Syzygium spp. The large and mainly Australian subgenus Phyllodineae (DC.) It has been successfully introduced in all parts of the state. Extensive seed collections have been made by CSIRO (Australia) from a range of Acacia species in Indonesia (Moluccas, Irian Jaya), Papua New Guinea and in northern Queensland. However, rooting is reported to be slow. Fibre: The wood is extensively used for paper pulp. This document is ENH163, one of a series of the Environmental Horticulture Department, UF/IFAS Extension. The heartwood is moderately resistant to preservative treatment, but the sapwood is permeable. Species studied: A. aulacocarpa , A. auriculiformis , A. crassicarpa , A. decurrens (Wendl.) ex Benth. Even pure peat with a pH of 3.1 presented no problems. Some Rhizobium strains are more effective in promoting growth than others. In India, its wood and charcoal are widely used for fuel. In Papua New Guinea, plantations grown on a 7-8-year rotation for pulpwood are not thinned. It is hardy to zone (UK) 10 and is frost tender. It can fix Nitrogen. Only A. crassicarpa and A. leucophloea are resistant to fire. Leaves arranged spirally, bipinnate and consisting of many opposite, sessile or short-stalked leaflets, or a phyllode made up of a flattened petiole and the proximal part of the rachis; extrafloral nectaries usually present on petiole and rachis; stipules present, spinescent or not. A large international provenance trial has been set up for A. mangium , involving 24 provenances tested in 19 sites in 8 countries. international trials of Acacia species and provenances (Kha, 2003; Luangviriyasaeng & Pinyopusarerk, 2002; Nor Ainiet al., 1994; Yang & Zeng, 1991) have shown that Acacia auriculiformis is a useful multipurpose - tree species, being fast-growing and suitable for timber and pulp production (Nghia, 2003; Turnbull et al., 1997). Division of Chemical Technology, Commonwealth Scientific and Industrial Research Organization. Measurements of the diameter at breast height provide sufficiently accurate and reliable yield estimates in A. mangium plantations. can girdle young stems and branches, causing them to break. Journal of Tropical Forest Science 4(3): 206-214. A. mangium flowers precociously and viable seed can be harvested 24 months after planting. It is a native of New Guinea, North Australia and Queensland. It drills quite easily, provided the base is supported to prevent end-chipping, and it turns well under low to moderate pressure. Plants in the nursery do not need to be inoculated with Rhizobium , because nodulation is prolific; however, the seedlings should be checked for the presence of active nitrogen-fixing root nodules prior to planting. The natural occurrences in western Papua New Guinea and Irian Jaya are mainly on … is an important planting tree species, but little attention has been paid to its wood properties, such as shrinkage, stiffness, strength, and basic density, which are important for use in structural and appearance-grade timber applications. It can fix Nitrogen. Acacia auriculiformis seedling. In tests in Australia using the sulphate process, wood chips of A. mangium from a 9-year-old plantation required only moderate amounts of alkali to yield in excess of 50% of screened pulp with excellent paper-making properties. The tree is of medium size and medium strength. The observed A. mangium trees in Peninsular Malaysia have problems especially regarding early forking and damage by fungi and insects. The bulk, about 60%, is only fit for pulpwood. In Peninsular Malaysia, the Forestry Department recently suspended the planting of A. mangium , pending an evaluation of the impact of heart rot. Survival after planting out is high: 60% for A. mangium planted in a windbreak in Imperata grassland, and over 90% when planted on more favourable sites. It is excellent for turnery articles, toys, carom coins, chessmen and handicrafts. Thinnings in plantations for the production of quality saw logs generally reduce the initial numberof trees from 900/ha to 100-200/ha in two or three thinnings. Sulphate pulping characteristics of Acacia hybrid, Acacia mangium and Acacia auriculiformis from Sabah. About 50 000 ha of A. mangium plantations have been established in Sabah, and about 42 000 ha in Peninsular Malaysia. A.Cunn. The timber hybrid Acacia is of medium dense having specific gravity 0.56 at green condition which is less than that of teak (Tectona grandis). The timber kiln dries rapidly but marked collapse may occur in early stages of seasoning; this can be remedied by reconditioning. Introduction Akashmoni (Acacia auriculiformis), an exotic fast growing tree species, was introduced to Bangladesh in 1960s as the shade tree in tea estates. It is caused by a wide variety of fungi, but can be overcome with the use of fungicide. Awang, K. & Taylor, D.A. The hot water is then drained off, cold water is added, and the seed is left to imbibe for 24 hours. The natural stands are accessible but not threatened by logging. Extracts of Acacia auriculiformis heartwood inhibit fungi that attack wood. Mimosaceae (Leguminosae - Mimosoideae). Wattle is a medium-weight hardwood. There is little experience with bare-root planting stock, but in the Philippines plantations have been succesfully established using this technique. and Dalbergia sissoo Roxb. The timber of Acacia species is used for furniture and cabinet making, light to heavy construction, door and window frames, mouldings, light flooring, poles, posts, panelling, mine timber, boat building, carts, wheels, joinery, turnery, oil crushers, tool handles, agricultural implements, matchboxes and splints, particle board, hardboard, veneer and plywood, pulp and paper. Branchlets are angular and glabrous. ( P. noxius in the Philippines) and by Ganoderma spp., causing 29% mortality in Papua New Guinea after 5 years. Native to north Queensland, Australia, the trees are also found in Papua New Guinea and the Moluccas Islands of Indonesia. Plantation-grown trees have been found promising for the production of unbleached kraft pulp and high-quality, neutral, sulphite semi-chemical pulp. The tree is used to make an analgesic by indigenous Australians. Acacia auriculiformis A. Cunn. The trees are also planted in fire-breaks and wind-breaks, for shade, soil protection, and as ornamentals. Devasahayam, S. & Rema, J. It is identified by narrow oblong lanceolate phyllodes and yellow catkin flowers. In old trees and in A. aulacocarpa and A. crassicarpa the lower part of the bole is often fluted. A. mangium has a stronger tendency to selfing. A gum produced by the stem or the roots is also used in local medicine. ex Benth.. Click on "show more" to view them. Texture fine to medium, even; streaky figure sometimes evident due to darker coloured streaks, wood lustrous. Acacia auriculiformis map Throughout India except Jammu & Kashmir, Sikkim, Arunachal Pradesh.