Effects of Planting Date and Growth Hormone on Growth and Yield of Cauliflower

Abstract

An experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh, during the period from October 2014 to March 2015 to study the effects of planting date and growth hormone on the growth and yield of cauliflower. The experiment consisted of two factors; Factor A: Three planting dates, such as P₁: Planting on 1 November; P₂: Planting on 15 November and P₃: Planting on 1 December; Factor B: Four levels of Growth hormone, such as H₀: No Hormone (control); H₁: 10 ppm IAA (Indole-3 Acetic Acid); H₂: 70 ppm GA₃ (Gibberellic Acid) and H₃: 10 ppm IAA + 70 ppm GA₃. The experiment was laid out following Randomized Complete Block Design (RCBD) with three replications. In case of planting date, the highest plant height (63.26 cm), number of leaves per plant (24.13), leaf length (59.26 cm), leaf breadth (19.31 cm) at harvest, curd diameter (22.25 cm), marketable yield per hectare (28.11 t ha^-1) were recorded from P₂ and the lowest of those parameters were recorded from P₃. In case of growth hormone the highest plant height (63.10 cm), number of leaves per plant (23.66), leaf length (59.05 cm), leaf breadth (18.98 cm) at harvest, curd diameter (22.39 cm), marketable yield per hectare (29.88 t ha^-1) were recorded from H₃ and the lowest of those perameters were recorded from H₀. Combination of planting date and growth hormone the highest plant height (65.96 cm), number of leaves per plant (26.42), leaf length (63.64 cm), leaf breadth (20.92 cm) at harvest, curd diameter (25.75 cm), marketable yield per hectare (31.03 t ha^-1) were recorded from planting on 15 November and 10 ppm IAA with 70 ppm GA₃ (P₂H₃) and the lowest parameters (21.75 t ha^-1) were recorded from planting on 1 December and no hormone (P₃H₀). It is apparent from the above results that the combination of planting on 15 November and 10 ppm IAA with 70 ppm GA₃ (P₂H₃) was more productive from the other combinations.

J. Environ. Sci. & Natural Resources, 9(2): 143-150 2016