Effect of potash and sulphur levels on growth, yield, quality parameters and economics in onion

Abstract

The research work was conducted at Krishi Vigyan Kendra, Sardarkrushinagar Dantiwada Agricultural University, Khedbrahma (Gujarat), during rabi season in three consecutive years (2019–2020; 2020–2021 and 2021–2022) to study the effect of potash and sulphur levels on growth, yield and quality of onion. Potash was applied @ 40, 60 and 80 kg ha-1 in combination with sulphur @ 0, 20, 40 and 60 kg ha-1 and their twelve treatment combinations were laid out in factorial randomized block design with three replications. Uniform dose of FYM (25 t ha-1) was applied to all the treatments. Data on plant height (cm), leaves plant-1 at 90 DAT, fresh bulb weight (g), bulb diameter (cm), fresh bulb yield (q ha-1) at harvest, S content of bulb (%) after harvest and Physiological Weight Loss (PLW %) after 1, 2 and 3 months of storage were recorded. It was found that application of potash and sulphur with recommended dose of nitrogen and phosphorus gave better results in relation to yield as well as quality characters. The results revealed that application of potash and sulphur with recommended dose of nitrogen and phosphorus (P2S1- 100:50:60:20 kg NPKS ha-1) gave better results in relation to yield, quality parameters like physiological weight loss and net return in onion.