EFFECT OF PLANTING TIME AND GIBBERELLIC ACID ON THE GROWTH AND YIELD OF CABBAGE

Abstract

An experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from October 2013 to March 2014. The experiment consisted of two factors: Factor A: Planting time (three levels) as - T = 05 Nov; T 2 = 20 Nov and T 3 = 05 Dec and Factor B: Gibberellic acid (four levels) as- G = 0 ppm (control); G 1 = 75 ppm ; G 2 = 95 ppm and G ii 3 = 115 ppm GA , respectively. The two factors experiment was laid out in Randomized Complete Block Design with three replications. The variety of cabbage was Atlas-70. Due to different planting time, the maximum thickness of head (13.3 cm) and the highest marketable yield (49.1 t/ha) was obtained from T 2 3 and the minimum thickness of head (12.5 cm) and the lowest marketable yield (45.9 t/ha) was obtained from T 3 . For GA , the maximum thickness of head (14.2 cm) and the highest marketable yield (54.7 t/ha) was found from G 3 and the minimum thickness of head (11.4 cm) and the lowest marketable yield (41.2 t/ha) was found from G 0. For combined effect the maximum thickness of head (14.5 cm) and the highest marketable yield (59.4 t/ha) was found from T , 2 G and the minimum thickness of head (10.8 cm) and the lowest marketable yield (37.1 t/ha) was found from T 3 G 0. Economic analysis revealed that T 2 G 2 2 gave the maximum benefit cost ratio (2.57). So, 20 Nov planting along with 95 ppm GA was the best for growth and yield of cabbage.