INFLUENCE OF BULB SIZE AND PHOSPHORUS ON GROWm AND FLOWERING OF TUBEROSE CV SINGLE

Abstract

The experiment was conducted in the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from April, 2007 to January, 2008. The experiment considered with two factors; Factor A: Three Bulb size i.e. small (B1:1-l.5 cm), medium (B2 :> 1.5-2.0 cm) and large (B3 :> 2.0-2.5 cm) in diameter; Factor B: Four levels of Phosphorus fertilizer i.e. F0: 0 kg, F1: 120 kg, Fi: 140 kg, F3: 160 k~~~ respectively. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. In case of bulb size, B3 produced tallest tuberose plant (55.32 cm), highest length of flower stalk (80.04 cm) B1 gave the lowest results in all and highest number of floret/spike (35.71) and cases. In case of phosphorus fertilizer tallest tuberose plant (55.4 cm), highest length of flower stalk (74.9cm) and highest number of floret/spike (31.6) was recorded in F2 and lowest results in control. For interaction effect the tallest tuberose plant (58. l cm), highest length of flower stalk (81.73cm) and highest number of floret/spike (39.5) was recorded in B3F2. So large size bulb with 140 kg P205/ha is best for growth and flowering of tuberose.