INFLUENCE OF BULB SIZE AND BORON ON GROWTH AND YIELD OF TUBEROSE

Abstract

A field experiment was conducted at the Floriculture Research Field, Bangladesh Agricultural Research Institute, Gazipur from February 2013 to November 2013. The experiment consisted of two factors such as Factor A: bulb size (3 levels): S (1.0-1.5cm) , S 2: medium (>1.5-2.0 cm) and S large (>2.0-2.5 cm) and Factor B: Four levels of boron, B 0 : Control, B 1 : 1kg/ha, B 2 3: : 2 kg/ha and B : 3 kg/ha . The experiment was laid out in Randomized Complete Block Design with three replications. The results of the experiment showed that the bulb size significantly influenced the time taken for emergence, spike initiation, flowering, spike length, rachis length, flower durability, leaves/plant, florets/spike, spikes/ha and bulbs/ha.Large bulb produced flower earlier than small bulb and better quality spikes. The highest yield of spikes (3,40,000 no./ha) and bulb ( 9.0 t/ha) were also produced form S 3 All doses of boron significantly improve on the yield contributing characters of tuberose over control, while the most effective dose was B 2. 3. However, the treatment combination of large size bulb with 2 kg/ha boron contributed the best performance in respect of vegetative growth, flower and bulb production in tuberose.