Vol. 12, Issue 6 (2023)

Author(s):
K Basavaraj, Venkat Reddy, Maheshkumar, Chethan T and Rajesh NL

Abstract:
An investigation was undertaken with fifty mustard genotypes to study the correlation and path A field experiment was conducted consecutively on 2020 and 2021 at Gotur village of Kalagi taluka in Kalaburagi district of North Eastern Dry Zone (Zone-2) of Karnataka to study the effect of sulphur, zinc and boron on yield and quality of onion in vertisol. The experiment consisted of ten treatments which were laid out in randomized complete block design with three replications. The pooled results of two years revealed that, application of Sulphur @ 30 kg ha^-1 + Zinc @ 4 kg ha^-1 + Boron @ 1.5 kg ha^-1 along with recommended dose of fertilizers (T₁₀) significantly recorded highest plant height (33.71, 54.53, 63.39 cm at 30, 60, 90 DAT), number of leaves per plant (7.66, 9.64, 10.19 at 30, 60, 90 DAT), leaf length (24.88, 36.65, 42.92 cm at 30, 60, 90 DAT), bulb length (6.21 cm), bulb diameter (6.61 cm), weight of bulb (84.25 g), bulb yield per plot (33.92 kg), bulb yield per hectare (30.19 t ha^-1), total soluble solids (15.38 ^oBrix), ascorbic acid (13.37 mg 100g^-1) and protein content of bulb (15.18%) and it was found on par with application of Sulphur @ 20 kg ha^-1 + Zinc @ 2 kg ha^-1 + Boron @ 1 kg ha^-1 along with recommended dose of fertilizers (T₉). The results clearly indicated that application of Sulphur @ 30 kg ha^-1 + Zinc @ 4 kg ha^-1 + Boron @ 1.5 kg ha^-1 along with recommended dose of fertilizers (T₁₀) significantly improved growth, yield and quality parameters of onion compared to other treatments and also found highest gross return (₹483040), net return (₹395626) and B:C ratio (5.53) of onion.