Hybrid Teak (Tectona grandis Linn.F.) in Thailand 2014.
The success of planting programmes depends not only on the site quality but also on the genetic quality of the planting materials. Although the growth and yield of the plantation can be largely improved through site selection, stem quality (i.e., straightness, persistence of stem axis, branching, flowering, etc.) is strongly controlled by genetic make-up (Keiding et al., 1986; Wellendorf and Kaosa-ard, 1988; Kaosa-ard, 1993).
PHOTO:HYBRID TEAK TREES @ 7 YEAR OLD , PHETCHABOON PROVINCE THAILAND.
Teak in Thailand is found extensively in the north and stretches along the western border down to latitude 14°N, i.e. the whole range extends from 14°N to 20°31 N and west to east longitude 97°30E to 104°30E at altitudes between 100-900 m above mean sea level (Mahaphol, 1954). Teak was associated with other species in the mixed deciduous forest, which at that time was estimated at 9,297,300 ha. It was assumed that approximately one-fourth of the forest land was under teak, i.e. the teak-bearing area was 2,324,300 ha. A number of factors control the distribution and growth of teak, including rainfall/soil moisture, temperature, light, geographical formation, and soil conditions (Kaosa-ard, 1980).
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