Impact of Nitrogen, Sulphur, and Foliar Applied Thiourea on Growth, Oil Yield, and Fatty Acid Profile of Canola

Canola ( Brassica napus L) is cultivated on different types of soils, and as a result of that, many issues occur related to nutrition. Field and pot experiments were accomplished to determine canola performance in response to different sulfur and nitrogen sources. In this experiment, canola cv. "Super canola" was grown with five different nutrient treatments maintained as recommended NPK, nitrogen 220 kg ha-1 , sulfur 60 kg ha-1 , nitrogen-sulfur at 220-60 kg ha-1 and foliar-applied thiourea at 1000 mg L-1 at flowering initiation and pod formation. Application of thiourea improved the growth which was significantly similar to soil-applied N-S. Thiourea application also increased oil contents followed by a combined application of soil-applied N-S. Thiourea and N-S increased protein contents ranging from 19.28% to 23.50%. Among fatty acids, thiourea showed higher concentrations in linoleic (18.73%), oleic (58.39%), and linolenic acid (8.29%) while lowering the erucic acid concentration (2.92%). The highest erucic acid contents were observed when recommended NPK was applied. In conclusion, foliar-applied thiourea has the potential to boost canola growth, yield, oil quality, protein contents, and fatty acid profile while also being an economically viable and alternative source of N and S.