Performance of Gurjan (Dipterocarpus turbinatus) and Teak (Tectona grandis) in Pure and Mixed Plantations at Kaptai, Bangladesh

Height and diameter at breast height of 26 year old gurjan and teak trees at one mixed (60 per cent Tectona grandis, 30 per cent Dipterocarpus turbinatus, 7 per cent Syzygium grande and 3 per cent Amoora rohituka) one gurjan and two teak plantations at Kaptai/Bangladesh were measured. Teak produced significantly higher girth in the mixed whereas gurjan showed better growth both in height and diameter in the pure plantation. The poor growth of teak in these sites is due to the strong soil acidity and resulting low available phosphorus content. Higher moisture content on the other hand, was associated with an increase in growth of teak.