Influence of sulphur, zinc and boron on growth, yield and quality of onion

Abstract

Field experiments were carried out to study the response of onion to different levels of sulphur (0, 15, 30kg/ha), zinc (0, 2, 4 kg/ha) and boron (0, 1, 2 kg/ha) along with recommended dose of fertilizer. totally 27 treatment combinations were made, laid out in factorial randomized block design with two replications, conducted at Olericulture unit of Kittur Rani Channamma College of horticulture, Belgaum district (Karnataka), during kharif, 2016. Results revealed that application of sulphur (30 kg/ha) significantly increased the plant height (62.75cm), number of leaves (9.75), neck thickness (2.49cm) when applied with zinc (4kg/ha) and boron (2kg/ha). bulb yield (31.25t/ha), Total soluble solids (13.08 0B), sulphur content in bulbs(0.59%), polar diameter (6.05cm), equatorial diameter(6.33cm) fresh weight of bulb(107.07gm), dry weight of bulb (33.50gm) when applied with zinc (4kg/ha) and boron (2kg/ha). And minimum rotting loss (5.07%), sprouting loss (3.79%), physiological loss in weight (10.24%) are found significant with application of sulphur (30 kg/ha), zinc (4kg/ha) and boron (2kg/ha). The study indicated that application of sulphur (30 kg/ha), zinc (4kg/ha) and boron (2kg/ha) with recommended dose of fertilizers was found to be the most appropriate combination for getting higher yield compared to other treatments.