Micronutrient deficiency and suboptimal fertility levels in soil can significantly impact the growth, yield, and quality of agricultural crops, including onions (Allium cepa L.). Addressing these issues through targeted interventions, such as micronutrient fortification and bioenhancers, holds promise for enhancing crop productivity and nutritional quality. This research paper investigates the effect of varying fertility levels in combination with micronutrient fortification and bioenhancer application on the growth, yield, and quality of onion crops. The investigation entitled effect of fertility levels with micronutrient fortification and bio enhancer on growth and yield of onion (Allium cepa L.) was carried out during rabi season of 2020-21 and 2021-22 at College Farm, College of Horticulture, S. D. Agricultural University, Jagudan. A factorial experiment was conducted with a randomized block design, comprising three factors i.e., two levels of fertilizer i.e., 80 per cent RDF (L1) and 60 per cent RDF (L2); micronutrient fortification with six levels i.e., Zinc @ 5 kg/ha (M1), Zinc @ 10 kg/ha (M2), Iron @ 5 kg/ha (M3), Iron @ 10 kg/ha (M4), Zinc + Iron @ 2.5 kg/ha each (M5) and Zinc + Iron @ 5 kg/ha each (M6) and two levels of bioenhancer i.e., NPK consortium @ 5.0 l/ha at sowing (B1) and Jeevamrut @ 500 l/ha at sowing, 45 DAP and 90 DAP (B2). Thus, there were total 24 treatment combinations under study. The experiment was laid out in Randomized Block Design with factorial concept with three replications. Based on the findings of this study, it can be concluded that the application of 80 per cent RDF along with soil application of Zinc + Iron @ 5 kg/ha each and drenching of jeevamrut at sowing, 45 DAP and 90 DAP was the best in terms of growth and yield as well in economic return in rabi onion. The challenges may include intricacies in controlling and measuring nutrient interactions, potential variations in soil conditions, and the need for comprehensive data analysis to discern the nuanced impact on crop productivity.

Bio enhancer, Fertility levels, Fortification, Growth, Micronutrient, Onion, Yield

In conclusion, the research extensively examined various growth, yield, quality, plant analysis, soil analysis, post-harvest, and economic parameters in onion cultivation. The application of different treatments significantly influenced many of these parameters, demonstrating the importance of nutrient management strategies. Noteworthy findings include the positive impact of the NPK consortium on plant height, the role of Zinc + Iron in enhancing yield parameters, and the beneficial effects of Jeevamrut on both yield and quality parameters. Additionally, interactions between fertility levels, micronutrient fortification, and bio-enhancers were explored. The study provides valuable insights into optimizing onion cultivation practices for improved productivity, quality, and economic returns. Based on the results of this study, it can be concluded that the application of 80 per cent RDF along with soil application of Zinc + Iron @ 5 kg each and drenching of jeevamrut at sowing, 45 DAP and 90 DAP was the best in terms of growth and yield parameters in rabi onion.

A.R. Patel, Piyush Verma, Chandni V. Mori and V.K. Parmar (2023). Effect of Fertility Levels with Micronutrient Fortification and Bio Enhancer on Growth and Yield of Onion (Allium cepa L.). Biological Forum – An International Journal, 15(12): 34-44.