Effect of different doses of nitrogen and boron on the performance of cauliflower (Brassica oleracea var. botrytis L.) in Chitwan, Nepal

A field experiment was conducted at Agriculture and Forestry University, Chitwan, Nepal during winter of 2017 to find out the effect of different doses of Nitrogen and Boron on the performance of cauliflower. A completely randomized block design (RCBD) with four replications and nine treatments were used with three different doses of Nitrogen (260, 200 and 140 Kg ha-1 ) as factor A, and three doses of Boron (1.7, 1.1 and 0.5 Kg ha-1 ) as factor B. In case of Nitrogen, all the morphological and yield parameters were recorded maximum from 260 Kg Nitrogen ha-1 at harvest and those parameters were recorded minimum from 140 Kg Nitrogen ha-1 at harvest. In case of Boron, all the morphological and yield parameters except curd diameter were recorded maximum from 1.7 Kg Boron ha-1 at harvest and those parameters were recorded minimum from 0.5 Kg Boron ha-1 at harvest. In case of combined effect, the highest curd yield (40.55 t ha-1 ) and lowest curd yield (34.05 t ha-1 ) were obtained from N1B2 and N3B3 respectively. Meanwhile, maximum curd dry matter (7.04 %) and minimum curd dry matter (5.39%) were obtained from N3B1 and N3B3 respectively. N1B3 accounted for the highest (19.33 cm) curd diameter which was statistically identical with all the other treatments except N3B3. N3B3 accounted for the minimum curd diameter (15.35 cm). Therefore, it can be concluded that the maximum curd yield and maximum curd diameter can be obtained from treatment N1B2 (260 Kg ha-1 + 1.1 Kg ha-1 ).