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Onion demand in domestic and international market is increasing day by day but non-availability of good quality seed is limitation for profitable seed production programme of onion. Hence an experiment was conducted to study the effect of dates of bulb planting and application of foliar nutrition on physiological parameters of onion during the Rabi season 2015-16 and 2016-17. The experiment consisted of five dates of bulb planting with four applications of foliar nutrition and was laid out in Randomized Complete Block Design (RCBD) with two factorial concepts. The experimental results revealed the significant effect of dates of bulb planting and application of foliar nutrition on physiological traits. Significantly less values were recorded in the parameters like chlorophyll content (69.50 and 72.50), dry matter accumulation (5.03 and 8.52 g) 40 and 60 days after planting, days to flower initiation (37.71), days to 50 % flowering (55.77), more values in pollen viability (87.23), pollen germination (70.07) were recorded by planting the bulbs on November-1st coupled with application of multi micronutrient mixture at 0.25 per cent (D3T3) and significantly the lowest was recorded by December-1st planting with without spray (D5T4).
Keywords: Chlorophyll, Foliar spray, Pollen, Onion