INFLUENCE OF GROWTH REGULATORS ON GROWTH FLOWERING AND BULB PRODUCTION OF TUBEROSE

Abstract

The experiment was conducted at the Floriculture Field of Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur during February, 2014 to March, 2015 to investigate the effect of plant growth regulators on growth, flowering and bulb production of tuberose. There were ten treatments comprising of three concentrations of three growth regulators along with control (soaked in water) namely T 1 : Control, T 2 : GA 3 100, T I 3 : GA 3 200, T 4 : GA : BAP 100, T 6 : BAP 200, T 7 : BAP 300, T 8 : CCC 250, T 9 : CCC 500 and T 3 : CCC 1000 ppm respectively. The experiment was laid out in a Randomized Complete Block Design with three replications. Vegetative growth, flower and yield characteristics of tuberose were influenced significantly by different level of growth regulators. Early bulb sprouting, flowering and maximum plant height, number of leaves/plant, spike length, rachis length, vase life and yield of spikes per hectare was increased with T 4, whereas T treatment increased plants per hill as well as bulb and bulblet production in tuberose. Finally, this result showed that the use of GA 3 5 @ 300 ppm, and BA @ 100 ppm are best because it helps to increase growth, flowering (4.8 lacs spikes/ha) and bulb production (12.5 t/ha) of tuberose.