Effect of nitrogen nutrition and spacing on seed production of cauliflower

Field experiments were conducted at Horticultural Research Station, Kandaghat for two years (1988–90) to find out the response of cauliflower (PSB-1) to different levels of nitrogen (0, 50, 100, 150, 200 kglha) and plant spacing (60 x 30 cm, 60 x 45 cm and 60 x 60 cm). Maximum days to 50 per cent curd maturity, bolting and flowering were recorded when no nitrogen was applied for seed crop. However, maximum plant height and number of branches per plant were obtained at 200 kg N/ha. Maximum seed yield per plant as well as per hectare was obtained at 200 kg N/ha. It was noticed that plant spacing had no significant effect on days to 50 per cent curd maturity, bolting, flowering and plant height. However, highest number of branches per plant and maximum seed yield per plant, was recorded at 60 x 60 cm, whereas maximum seed yield per hectare was recorded at 60 x30 cm. It was concluded that an application of 200 kg N/ha and a plant spacing of 60 x 30 cm is best for obtaining maximum seed yield per hectare of cauliflower cv. PSB-1.