Vegetos

Abstract

Boron deficiency could impact production, physiology and chemical composition of parthenocarpic cucumber (Cucumissativus L.). A two-year greenhouse experiment was conducted to study response of boron fertilizers (1, 1.5kg/ha of borax, 0.25, 0.50% of boric acid and there combinations) on physiology and chemical composition of parthenocarpic cucumber cultivar ‘silyon’. The results revealed that, nitrogen, boron concentration of leaf tissue taken at 50 (4.25%, 57.88ppm respectively) and 100 days of sowing (2.49%, 48.09ppm respectively) with their uptake was shown higher in the soil application of boron at the rate of 1.5 kg ha⁻¹ along with foliar spray of boric acid 0.5% (82.47g, 159.55mg respectively). The treatment of Soil application of boron at the rate of 1.5 kg ha⁻¹ along with foliar spray of boric acid (0.25%) found(T8)best for phosphorus, potassium concentration of leaf tissue taken at 50 (0.390&2.78% respectively) and 100 days of sowing (0.229 &1.39% respectively) with their uptake (7.39& 44.82g respectively) and benefit cost ratio of 2.64 rupees under optimum economic boron rate (OEBR). However, in nine treatment combinations treatment T8[Soil application of boron at the rate of 1.5 kg ha⁻¹ along with foliar spray of boric acid (0.25%)] found to be optimum to enhance the overall productivity of green house parthenocarpic cucumber under tropical condition with reduction in curled and aborted fruit percentage (2.57 & 9.69% respectively). Similar studies with different soils in the country and initial soil-test boron levels are needed to conclude if these critical soil test values and OEBR can be applied across the region.