Legume Research - An International Journal

Field experiment was conducted to investigate the effect of foliar spray of nutrients and plant growth regulator on morphophysiological traits, biochemical parameters and yield of blackgram. The treatments viz., foliar spray of 2% DAP, 100 ppm salicylic acid + 2% DAP + 0.2% Boric acid + 0.5% FeSO₄ + 0.5% ZnSO₄ + 0.05% Na₂MoO₄, 2% urea, humic acid 20 kg soil application + 0.1% humic acid foliar spray, 1% KCl + humic acid 20 kg/ha as soil application + 0.1% humic acid foliar spray, 1% KCl + humic acid 20 kg/ha as soil application, brassinosteroid 0.1 ppm and control were imposed at 25 days after sowing and 15 days after first spray. Among the treatments, foliar spray of 2% urea had the profound effect in improving the growth attributes, chlorophyll content, soluble protein and nitrate reductase activity. Further foliar spray of 2% urea recorded the highest yield of 900 kg/ha with a yield increment of 20% over control. The yield enhancement might be due to the improved morpho-physiological traits and yield attributes.