Gmelina arborea (yemane, gmelina, white teak)

Viable seeds / kg (approx.): 1,170

Minimum purchase: 250 g




Description



G. arborea is native to Southeast
Asia, but due to its wide adaptation, rapid growth and versatile wood, it has
been introduced successfully in many tropical countries. It can reach 12-30 m
in height and diameters (DBH) of 60 -100 cm.



Uses



The wood is whitish, light to
moderately light, with good resistance to weight, which makes it an extremely
versatile wood, suitable for the manufacture of a wide variety of products such
as furniture, general construction, laminated beams, boards and pallets. It
presents dimensional stability and ease for the application of dyes, finishes
and gluing.



Environmental conditions



It is a very adaptable species to a
wide range of climatic conditions, with better development at altitudes of
0-900 masl, mean rainfall of 1000-4000 mm per year and dry seasons of 3-5
months.



Soils



It is suggested to plant in deep soils,
moist but well drained, with good contents of calcium and magnesium. It does
not tolerates flooded soils, even temporarily, very eroded, compacted or acids.



Seeds and nursery



As a pre-germination treatment it
is recommended to soak the seed in running water at room temperature for 24
hours. For the seedbed it is recommended to use a sterile and disinfected
substrate, such as river sand, well washed and sterilized, distributing the
seed uniformly (1 kg / m2). What it is normally called “seed” is
actually a drupe that contains 1-4 flattened seeds, so that from each drupe 2-3 seedlings can usually emerge. The highest germination occurs after 7-21 days.
Transplanting is done when the seedlings reach 3 to 5 cm and the first true leaves
appear. The root is usually very long, so it must be pruned to about 3 cm in
length. When transplanting, be sure to make a hole deep enough in the substrate
to avoid curving up of the roots. Shade should be provided for the first 2-3
weeks after transplanting, for instance using shade clothing (saran) 50%.  Seedlings in bags reach 20-30 cm after 1-2
months. A couple of weeks before planting out in the field it is recommended to
reduce watering to stimulate the lignification of the stems. It can also be
produced by pseudo-cuttings, although this system is no longer widely used.



Growth



G. arborea is one of the fastest
growing species in the tropics. With our improved seed, yields of 38 m3
/ ha / year or more can be achieved, with increments in height and diameter of
4.6 m and 4 cm respectively, and even more, in good sites. In a plantation
located in Sarapiquí, Costa Rica, heights of 25 m and 22.5 cm in diameter were
reported at 2.5 years.


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Banco de Semillas Forestales

Costa Rica

USD 80/kg