EFFECT OF MICRONUTRIENTS AND PLANT GROWTH REGULATORS ON MORPHO-PHYSIOLOGICAL CHARACTERS AND YIELD OF CAULIFLOWER

Abstract

The experiment was conducted during the period from 7 November 2017 to 22 February 2018 in the experimental field of Sher-e- Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka which laid out in a Randomized Complete Block Design (RCBD) with three replications. The research on ‘Durga’ variety of cauliflower with a view to know the effects of micronutrients and plant growth regulators on Morpho-physiological characters and yield of cauliflower. Micronutrients were applied before transplanting as basal application except control treated plot along with urea, TSP, MP, Furadan 5G for field preparation and plant growth regulators were applied at two different days after transplanting as foliar application including seven treatments of both micronutrients and plant growth regulators which were statistically analyzed combindly for accurately detected and compared. Treatments)- T o , H o (Control) ; T 1 : 5s kg/ha B; T 2 = 5 kg/ha Zn; T 3 : 5 kg/ha B + 5 kg/ha Zn; T 4 : 5 kg/ha B + 5 kg/ha Zn + 50 ppm IAA; T 5 : 5 kg/ha B + 5 kg/ha Zn + 50 ppm GA 3; T 6 :

: 5 kg/ha B + 5 kg/ha Zn + 50ppm IAA + 50 ppm GA 3 . The maximum plant height, plant canopy, length of leaves at 40 DAT and chlorophyll content at 41 DAT were (45.32cm, 62.76cm, 28.21cm, 55.31 respectively) recorded from treatment T 6 but the maximum breadth (16.38cm) and num. of leaves (21.46) were found from treatment T 4 and

T 3 respectively while the minimum was (31.93cm, 42.03cm, 21.45cm, 50.17 respectively) found from treatment T o except length of leaves that found from T 1. At 55 DAT, the maximum plant height, plant canopy, length, breadth and number of leaves were (53.39cm, 71.73cm, 31.61cm, 18.3cm and 24.33 respectively) found from treatment T 6 while minimum were (35.13cm, 45.90cm, 23.32cm, 12.08cm, 15.13 respectively) found from control treatment T o . After harvesting maximum stem length, curd diameter, weight of leaves, roots, fresh curd, marketable curd and fresh curd yield per bed, marketable curd yield ton per hectare and dry weight of leaves, roots, fresh curd were (15.11cm, 23.89cm, 754.06gm, 155.87gm, 1549.33gm, 2113gm, 30986.67gm/bed, 70.43ton/ha, 60.67gm, 28.02gm, 44.30gm respectively) resulted from treatment T 6

while only micronutrients treated on plants showed their higher resulted were (11.52cm, 20.15cm, 766.73gm, 58.16gm, 904.40gm, 1427.66gm, 18088gm/bed, 47.59ton/ha, 61.03gm, 16.93gm, 33.93gm respectively) found from treatment T 3 except stem length (T 2 ), chlorophyll content and leaf area index (T 1 ) and minimum were (8.32cm, 9.98cm, 327.78gm, 43.66gm, 430.80gm, 512.06gm, 8616gm/bed, 17.06ton/ha, 33.32gm, 22.19gm, 13.56gm respectively) resulted from control treatment T o except weight of roots and dry roots which were found from treatment T 1 . Among those treatments, T 4 treated plots were taken very few intended (43no.) days from transplanting to curd initiation and T 6, combined treatment of micronutrient and plant growth regulators on plants induced superior result of Morphophysiological

characters and yield of cauliflower than only micronutrients treated plants or any other treatments.

B o , Zn o and T 6