EFFECT OF SOWING TIME AND GA3 ON GROWTHAN YIELD OF OKRA

Abstract

The experiment was conducted at the horticultural research field of Sher-e-Bangla Agricultural University, Dhaka, during the period from April to August 2017 to study the effect of sowing time and GA 3 on the growth and yield of okra. Two factors was considered for the present study such as four levels of gibberellic acid (GA 3 ) viz. G 0 = 0 ppm GA 3 , G 1 = 60 ppm GA 3 , G 2 = 80 ppm GA 3 and G 3 = 100 ppm GA 3 and three levels of sowing time viz. S 1 = 15 April 2017, S 2 = 30 April 2017 and S 3 = 15 May 2017. The experiment was laid out in Randomized Complete Block Design with three replications. Most of the studied parameters showed significant influence affected by gibberellic acid and time of sowing and their combination. The highest performance was found at the application of G 2 and lowest performance was found at the application of G 0 . In terms of sowing time, highest performance was found at okra seed sown at S 2 and lowest performance was found at S 3 . For combined effect the treatment combination of G 2 S 2 showed the highest number of branch

(5.00), dry weight (13.40%), fruit (11.60 cm), diameter of fruit (8.96 cm), number of flowers (35.50), fruits plant (22.60) and fruit yield ha -1 (18.90 t). But the highest plant height (123.00 cm), highest number of leaves plant -1 (29.10 cm), highest leaf length (50.43 cm), highest leaf breadth (30.00 cm), highest length of petiole (29.88 cm), highest stem diameter (3.50 cm) and highest length of internodes (7.33 cm) was found from G 3 S 1 . In terms of economic analysis, the highest BCR (3.12) was obtained from G 2 S 2 . Application of 80 ppm GA 3 and 30 April seed sowing was best for growth and yield of okra.