Effect of thiourea and zinc on growth and yield of cauliflower (Brassica oleracea var botrytis L.)

A field experiment was conducted to study the effect of thiourea and zinc on growth, and yield of cauliflower (Brassica oleracea var. botrytis L.) during rabi season of 2015–16 at Horticulture Farm, SKN. College of Agriculture, Jobner. The experiment consisted of 16 treatment combinations with four levels of thiourea (control, 500, 750 and 1000 ppm) and four levels of zinc (control, 2.5, 5.0 and 7.5 kg/ha) in a randomized block design with three replications. The results revealed that T₃Z₃ (thiourea 1000 ppm + zinc 7.5 kg/ha) significantly increased leaf area, total chlorophyll content, curd weight and curd yield, showing statistical equality with T₃Z₂ (1000 ppm thiourea + zinc 5.0 kg/ha). It could be recommended that thiourea in combination with micronutrient (zinc) are the most essential plant mineral nutrients for growth and curd yield of cauliflower under loamy sand soils of semi-arid condition.