Vegetative propagation of Tali (Palaquium polyanthum Engl.) for commercial harvest and landscape conservation

The experiment was conducted to find out suitable vegetative propagation techniques for Tali (Palaquium polyanthum Engl.), a native threatened tree species of Bangladesh. One year old stock plants growing in hedgerows were topped leaving 50-60 cm stump above the ground. The effects of different concentrations of IBA (Indole-3 Butyric Acid) hormones on the rooting ability of Tali were investigated in a non-mist propagator. IBA application significantly enhanced the rooting percentage of the species. The species showed (67±4.04)% rooting response with 0.4% IBA treatment after 87 days. There were significant differences among IBA treatments and control at 95% significant level. Maximum number of roots (5±1) was found in 0.8% IBA treated cuttings while the highest root length (3.05±0.27) cm was observed in 1.2% IBA treated cuttings. However, the highest survival percentage (100%) was observed in 0.4% IBA treated cuttings. The results suggest that rooting of juvenile leafy stem cuttings with IBA application may be an effective mean of rooting and suitable vegetative propagation technique for the species.