EFFECT OF PLANT GROWTH REGULATORS ON GROWTH CURD YIELD AND SEED PRODUCTION OF CAULIFLOWER

Abstract

Two (icEd experiments were conducted at the farm of the Horticulture Research Center (}-IRC), Bangladesh Agricultural Research institute (BAR1). Joydebpur, Gazipur during the period from October 2004 to March 2005. The objectives of the research work were to study the curd yield and seed production of I3ARE Fulkapi-1 as influenced by different levels of Gibberellic acid (GA 3 ) and Ethrel. Both the experiments were laid out in a randomized complete block design (RCBD). The field experiment had three replications There were live concentrations olGA 3 (50, 75. 100. 125 and 150 ppm) in the first experiment and three concentration of both GA3 and Ethrel (300. 350. 400 and 50, 75, 100 ppm) in the second experiment. For curd initiation the maximum time (85.00 days) was required in plants treated with 150 ppm GA3 while the minimum time (80.00 days) was required with 50 ppm GA 3. The maximum number of leaves (26) were obtained in 125 ppm GA1 and the minimum (23) in 50 ppm GA3 and control treatment. The maximum curd weight with Leaves 2.20 kg), markeiablc curd weight (1.50 kg), curd length (27 cm), curd breadth (240cm), yield per plot (20.20 kg) and yield per hectare (57.71 tons) were recorded by ISO ppm GA3 and control treatment showed the lowest performance. For curd production, the highest BCR value of 2.90 was observed in 150 ppm GA 7. The highest plant height (115 cm) was recorded in 350 ppm GA3 while lowest was (84.00 cm) recorded in 100 ppm Ethrel. The maximum number of pods per plant (2850), pod length (7.50 cm), seeds per pod (16,30). seed weight per plant (38.53 g), 1000 seed weight (4.97 g), seed yield (1.57 i/ha) and percentages of seed germination (97.50) were found in 350 ppm CiA3 . 350 ppm GA3 also had the highest 13CR value of 8.02 indicating the economic viability of using growTh regulator in seed production of cauliflower