Effects of varieties and different micronutrients on growth and yield of broccoli (Brassica oleracea var. italica)

An experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh, during the period of November 2021 to February 2022. The experiment consisted of two factors, such as factor A: three varieties of broccoli i.e. V1: Early You, V2: Barbara, V3: Green Crown and factor B: four levels of micronutrients i.e. T0: control, T1: Boron @ 3 kg/ha, T2: Zinc @ 2 kg/ha, T3: Boron + Zinc @ (3+2) kg/ha. The two-factor experiment was laid out in Randomized Complete Block Design with three replications. Variety and micronutrients influenced significantly on most of the parameters under the study. In case of variety, the highest curd yield (13.35 t/ha) was found from V3 (Green Crown) and the lowest curd yield (11.12 t/ha) was found from V1 (Early You). V2 (Barbara) showed higher dry matter content of broccoli curd, which is 15.72%. On the other hand, V¬1 (Early You) showed lower dry matter content, which is 13.34%. For micronutrients, T3 (Boron +Zinc @3+2 kg/ha) performed the highest in respect of curd yield (19.37 t/ha) and the lowest (6.32 t/ha) was from T0 (control). T3 (Boron+Zinc @3+2kg/ha) showed higher dry matter content (13.01%), whereas T0 (control) showed the least (11.02%). For combined treatment, the highest curd yield (21.61t/ha) was obtained from V3T3 (Green Crown and Boron +Zinc @ 3+2 kg/ha micronutrient dose) and the lowest curd yield (5.23 t/ha) from V0T0 (Early You and control). V2T3 (Boron+ Zinc @3+2 kg/ha with Barbara variety) produced the highest dry matter content of curd, which is 17.34%. On the other hand, the lowest dry matter content of broccoli curd is provided by V1T0 (Early You variety with control) treatment combination which is 12.49%. Therefore, it can be concluded that V3 (Green Crown) along with Boron+Zinc @ 3+2 kg/ha and V2 (Barbara) along with Boron+Zinc @ 3+2 kg/ha were found to be the best in respect of yield and dry matter content of broccoli, respectively, compared to other treatments.